src/lib/els_scroller.c

   1 #include <Elementary.h>
   2 #include "elm_priv.h"
   3
   4 #define SMART_NAME "els_scroller"
   5 #define API_ENTRY Smart_Data *sd; sd = evas_object_smart_data_get(obj); if ((!obj) || (!sd) || (evas_object_type_get(obj) && strcmp(evas_object_type_get(obj), SMART_NAME)))
   6 #define INTERNAL_ENTRY Smart_Data *sd; sd = evas_object_smart_data_get(obj); if (!sd) return;
   7 typedef struct _Smart_Data Smart_Data;
   8
   9 #define EVTIME 1
  10 //#define SCROLLDBG 1
  11
  12 struct _Smart_Data
  13 {
  14    Evas_Coord   x, y, w, h;
  15    Evas_Coord   wx, wy, ww, wh; /* Last "wanted" geometry */
  16
  17    Evas_Object *smart_obj;
  18    Evas_Object *child_obj;
  19    Evas_Object *pan_obj;
  20    Evas_Object *edje_obj;
  21    Evas_Object *event_obj;
  22
  23    Evas_Object *widget;
  24
  25    Elm_Smart_Scroller_Policy hbar_flags, vbar_flags;
  26
  27    struct {
  28         Evas_Coord x, y;
  29         Evas_Coord sx, sy;
  30         Evas_Coord dx, dy;
  31         Evas_Coord pdx, pdy;
  32         Evas_Coord bx, by;
  33         Evas_Coord ax, ay;
  34         Evas_Coord bx0, by0;
  35         Evas_Coord b0x, b0y;
  36         Evas_Coord b2x, b2y;
  37         struct {
  38              Evas_Coord    x, y;
  39              double        timestamp, localtimestamp;
  40         } history[60];
  41         struct {
  42            double tadd, dxsum, dysum;
  43            double est_timestamp_diff;
  44         } hist;
  45       double anim_start;
  46       double anim_start2;
  47       double anim_start3;
  48       double onhold_vx, onhold_vy, onhold_tlast, onhold_vxe, onhold_vye;
  49       double extra_time;
  50       Evas_Coord hold_x, hold_y;
  51       Ecore_Animator *hold_animator;
  52       Ecore_Animator *onhold_animator;
  53       Ecore_Animator *momentum_animator;
  54       Ecore_Animator *bounce_x_animator;
  55       Ecore_Animator *bounce_y_animator;
  56       Evas_Coord locked_x, locked_y;
  57       int hdir, vdir;
  58       unsigned char now : 1;
  59       unsigned char cancelled : 1;
  60       unsigned char hold : 1;
  61       unsigned char hold_parent : 1;
  62       unsigned char want_dragged : 1;
  63       unsigned char dragged : 1;
  64       unsigned char dragged_began : 1;
  65       unsigned char dir_x : 1;
  66       unsigned char dir_y : 1;
  67       unsigned char locked : 1;
  68       unsigned char bounce_x_hold : 1;
  69       unsigned char bounce_y_hold : 1;
  70       unsigned char scroll : 1;
  71       unsigned char want_reset : 1;
  72    } down;
  73
  74    struct {
  75       Evas_Coord w, h;
  76    } child;
  77    struct {
  78       Evas_Coord x, y;
  79    } step, page;
  80
  81    struct {
  82       void (*set) (Evas_Object *obj, Evas_Coord x, Evas_Coord y);
  83       void (*get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  84       void (*max_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  85       void (*min_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  86       void (*child_size_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  87       void (*gravity_set) (Evas_Object *obj, double x, double y);
  88       void (*gravity_get) (Evas_Object *obj, double *x, double *y);
  89    } pan_func;
  90
  91    struct {
  92       struct {
  93          Evas_Coord start, end;
  94          double t_start, t_end;
  95          Ecore_Animator *animator;
  96       } x, y;
  97    } scrollto;
  98
  99    double pagerel_h, pagerel_v;
 100    Evas_Coord pagesize_h, pagesize_v;
 101
 102    unsigned char hbar_visible : 1;
 103    unsigned char vbar_visible : 1;
 104    unsigned char extern_pan : 1;
 105    unsigned char one_dir_at_a_time : 1;
 106    unsigned char hold : 1;
 107    unsigned char freeze : 1;
 108    unsigned char bouncemex : 1;
 109    unsigned char bouncemey : 1;
 110    unsigned char bounce_horiz : 1;
 111    unsigned char bounce_vert : 1;
 112    unsigned char event_propagation :1;
 113    Eina_Bool momentum_animator_disabled :1;
 114    Eina_Bool bounce_animator_disabled :1;
 115    Eina_Bool is_mirrored : 1;
 116    Eina_Bool wheel_disabled : 1;
 117 };
 118
 119 /* local subsystem functions */
 120 static void _smart_child_del_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
 121 static void _smart_pan_changed_hook(void *data, Evas_Object *obj, void *event_info);
 122 static void _smart_pan_pan_changed_hook(void *data, Evas_Object *obj, void *event_info);
 123 static void _smart_event_wheel(void *data, Evas *e, Evas_Object *obj, void *event_info);
 124 static void _smart_event_mouse_down(void *data, Evas *e, Evas_Object *obj, void *event_info);
 125 static Eina_Bool  _smart_hold_animator(void *data);
 126 static Eina_Bool  _smart_momentum_animator(void *data);
 127 static void _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj, void *event_info);
 128 static Eina_Bool  _smart_onhold_animator(void *data);
 129 static void _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj, void *event_info);
 130 static void _smart_edje_drag_v_start(void *data, Evas_Object *obj, const char *emission, const char *source);
 131 static void _smart_edje_drag_v_stop(void *data, Evas_Object *obj, const char *emission, const char *source);
 132 static void _smart_edje_drag_v(void *data, Evas_Object *obj, const char *emission, const char *source);
 133 static void _smart_edje_drag_h_start(void *data, Evas_Object *obj, const char *emission, const char *source);
 134 static void _smart_edje_drag_h_stop(void *data, Evas_Object *obj, const char *emission, const char *source);
 135 static void _smart_edje_drag_h(void *data, Evas_Object *obj, const char *emission, const char *source);
 136 static void _smart_scrollbar_read(Smart_Data *sd);
 137 static void _smart_scrollbar_reset(Smart_Data *sd);
 138 static int  _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd);
 139 static int  _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd);
 140 static void _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd);
 141 static void _smart_scrollbar_size_adjust(Smart_Data *sd);
 142 static void _smart_reconfigure(Smart_Data *sd);
 143 static void _smart_add(Evas_Object *obj);
 144 static void _smart_del(Evas_Object *obj);
 145 static void _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
 146 static void _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
 147 static void _smart_show(Evas_Object *obj);
 148 static void _smart_hide(Evas_Object *obj);
 149 static void _smart_color_set(Evas_Object *obj, int r, int g, int b, int a);
 150 static void _smart_clip_set(Evas_Object *obj, Evas_Object *clip);
 151 static void _smart_clip_unset(Evas_Object *obj);
 152 static void _smart_init(void);
 153
 154 /* local subsystem globals */
 155 static Evas_Smart *_smart = NULL;
 156
 157 /* externally accessible functions */
 158 Evas_Object *
 159 elm_smart_scroller_add(Evas *evas)
 160 {
 161    _smart_init();
 162    return evas_object_smart_add(evas, _smart);
 163 }
 164
 165 static Evas_Coord
 166 _elm_smart_scroller_x_mirrored_get(Evas_Object *obj, Evas_Coord x)
 167 {
 168    API_ENTRY return x;
 169
 170    Evas_Coord cw, ch, w, ret;
 171    elm_smart_scroller_child_viewport_size_get(obj, &w, NULL);
 172    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 173    ret = (cw - (x + w));
 174    return (ret >= 0) ? ret : 0;
 175 }
 176
 177 void
 178 elm_smart_scroller_mirrored_set(Evas_Object *obj, Eina_Bool mirrored)
 179 {
 180    API_ENTRY return;
 181    Evas_Coord wx;
 182    if (sd->is_mirrored == mirrored)
 183      return;
 184
 185    sd->is_mirrored = mirrored;
 186    edje_object_mirrored_set(sd->edje_obj, mirrored);
 187
 188    if (sd->is_mirrored)
 189      wx = _elm_smart_scroller_x_mirrored_get(sd->smart_obj, sd->wx);
 190    else
 191      wx = sd->wx;
 192
 193    elm_smart_scroller_child_pos_set(sd->smart_obj, wx, sd->wy);
 194 }
 195
 196 void
 197 elm_smart_scroller_child_set(Evas_Object *obj, Evas_Object *child)
 198 {
 199    Evas_Coord w, h;
 200    Evas_Object *o;
 201
 202    API_ENTRY return;
 203    if (sd->child_obj)
 204      {
 205         _elm_smart_pan_child_set(sd->pan_obj, NULL);
 206         evas_object_event_callback_del_full(sd->child_obj, EVAS_CALLBACK_DEL, _smart_child_del_hook, sd);
 207      }
 208
 209    sd->child_obj = child;
 210    sd->wx = sd->wy = 0;
 211    /* (-1) means want viewports size */
 212    sd->ww = sd->wh = -1;
 213    if (!child) return;
 214
 215    if (!sd->pan_obj)
 216      {
 217         o = _elm_smart_pan_add(evas_object_evas_get(obj));
 218         sd->pan_obj = o;
 219         evas_object_smart_callback_add(o, "changed", _smart_pan_changed_hook, sd);
 220         evas_object_smart_callback_add(o, "pan_changed", _smart_pan_pan_changed_hook, sd);
 221         edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", o);
 222      }
 223
 224    sd->pan_func.set = _elm_smart_pan_set;
 225    sd->pan_func.get = _elm_smart_pan_get;
 226    sd->pan_func.max_get = _elm_smart_pan_max_get;
 227    sd->pan_func.min_get = _elm_smart_pan_min_get;
 228    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
 229    sd->pan_func.gravity_set = _elm_smart_pan_gravity_set;
 230    sd->pan_func.gravity_get = _elm_smart_pan_gravity_get;
 231
 232    evas_object_event_callback_add(child, EVAS_CALLBACK_DEL, _smart_child_del_hook, sd);
 233    _elm_smart_pan_child_set(sd->pan_obj, child);
 234    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
 235    sd->child.w = w;
 236    sd->child.h = h;
 237    _smart_scrollbar_size_adjust(sd);
 238    _smart_scrollbar_reset(sd);
 239 }
 240
 241 void
 242 elm_smart_scroller_extern_pan_set(Evas_Object *obj, Evas_Object *pan,
 243                                   void (*pan_set) (Evas_Object *obj, Evas_Coord x, Evas_Coord y),
 244                                   void (*pan_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 245                                   void (*pan_max_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 246                                   void (*pan_min_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 247                                   void (*pan_child_size_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y))
 248 {
 249    API_ENTRY return;
 250
 251    elm_smart_scroller_child_set(obj, NULL);
 252
 253    if (sd->pan_obj)
 254      {
 255         evas_object_smart_callback_del(sd->pan_obj, "changed", _smart_pan_changed_hook);
 256         evas_object_smart_callback_del(sd->pan_obj, "pan_changed", _smart_pan_pan_changed_hook);
 257      }
 258
 259    if (sd->extern_pan)
 260      {
 261         if (sd->pan_obj)
 262           {
 263              edje_object_part_unswallow(sd->edje_obj, sd->pan_obj);
 264              sd->pan_obj = NULL;
 265           }
 266      }
 267    else
 268      {
 269         if (sd->pan_obj)
 270           {
 271              evas_object_del(sd->pan_obj);
 272              sd->pan_obj = NULL;
 273           }
 274      }
 275    if (!pan)
 276      {
 277         sd->extern_pan = 0;
 278         return;
 279      }
 280
 281    sd->pan_obj = pan;
 282    sd->pan_func.set = pan_set;
 283    sd->pan_func.get = pan_get;
 284    sd->pan_func.max_get = pan_max_get;
 285    sd->pan_func.min_get = pan_min_get;
 286    sd->pan_func.child_size_get = pan_child_size_get;
 287    sd->pan_func.gravity_set = _elm_smart_pan_gravity_set;
 288    sd->pan_func.gravity_get = _elm_smart_pan_gravity_get;
 289    sd->extern_pan = 1;
 290    evas_object_smart_callback_add(sd->pan_obj, "changed", _smart_pan_changed_hook, sd);
 291    evas_object_smart_callback_add(sd->pan_obj, "pan_changed", _smart_pan_pan_changed_hook, sd);
 292    edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
 293    evas_object_show(sd->pan_obj);
 294 }
 295
 296 void
 297 elm_smart_scroller_custom_edje_file_set(Evas_Object *obj, char *file, char *group)
 298 {
 299    API_ENTRY return;
 300
 301    edje_object_file_set(sd->edje_obj, file, group);
 302    if (sd->pan_obj)
 303      edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
 304    sd->vbar_visible = !sd->vbar_visible;
 305    sd->hbar_visible = !sd->hbar_visible;
 306    _smart_scrollbar_bar_visibility_adjust(sd);
 307    if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
 308      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,hbar", "elm");
 309    else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
 310      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
 311    else
 312      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,hbar", "elm");
 313    if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
 314      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,vbar", "elm");
 315    else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
 316      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
 317    else
 318      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,vbar", "elm");
 319 }
 320
 321 Eina_Bool
 322 elm_smart_scroller_momentum_animator_disabled_get(Evas_Object *obj)
 323 {
 324    API_ENTRY return EINA_FALSE;
 325    return sd->momentum_animator_disabled;
 326 }
 327
 328 void
 329 elm_smart_scroller_momentum_animator_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 330 {
 331    API_ENTRY return;
 332    sd->momentum_animator_disabled = disabled;
 333    if (sd->momentum_animator_disabled)
 334      {
 335         if (sd->down.momentum_animator)
 336           {
 337              ecore_animator_del(sd->down.momentum_animator);
 338              sd->down.momentum_animator = NULL;
 339           }
 340      }
 341 }
 342
 343 Eina_Bool
 344 elm_smart_scroller_bounce_animator_disabled_get(Evas_Object *obj)
 345 {
 346    API_ENTRY return EINA_FALSE;
 347    return sd->bounce_animator_disabled;
 348 }
 349
 350 void
 351 elm_smart_scroller_bounce_animator_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 352 {
 353    API_ENTRY return;
 354    sd->bounce_animator_disabled = disabled;
 355    if (sd->bounce_animator_disabled)
 356      {
 357         if (sd->scrollto.x.animator)
 358           {
 359              ecore_animator_del(sd->scrollto.x.animator);
 360              sd->scrollto.x.animator = NULL;
 361           }
 362
 363         if (sd->scrollto.y.animator)
 364           {
 365              ecore_animator_del(sd->scrollto.y.animator);
 366              sd->scrollto.y.animator = NULL;
 367           }
 368      }
 369 }
 370
 371 Eina_Bool
 372 elm_smart_scroller_wheel_disabled_get(Evas_Object *obj)
 373 {
 374    API_ENTRY return EINA_FALSE;
 375    return sd->wheel_disabled;
 376 }
 377
 378 void
 379 elm_smart_scroller_wheel_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 380 {
 381    API_ENTRY return;
 382    if ((!sd->wheel_disabled) && (disabled))
 383      evas_object_event_callback_del_full(sd->event_obj, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
 384    else if ((sd->wheel_disabled) && (!disabled))
 385      evas_object_event_callback_add(sd->event_obj, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
 386    sd->wheel_disabled = disabled;
 387 }
 388
 389 /* Update the wanted coordinates according to the x, y passed
 390  * widget directionality, child size and etc. */
 391 static void
 392 _update_wanted_coordinates(Smart_Data *sd, Evas_Coord x, Evas_Coord y)
 393 {
 394    Evas_Coord cw, ch;
 395
 396    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 397
 398    /* Update wx/y/w/h - and if the requested positions aren't legal
 399     * adjust a bit. */
 400    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &sd->ww, &sd->wh);
 401    if (x < 0)
 402       sd->wx = 0;
 403    else if ((x + sd->ww) > cw)
 404       sd->wx = cw - sd->ww;
 405    else if (sd->is_mirrored)
 406       sd->wx = _elm_smart_scroller_x_mirrored_get(sd->smart_obj, x);
 407    else
 408       sd->wx = x;
 409    if (y < 0) sd->wy = 0;
 410    else if ((y + sd->wh) > ch) sd->wy = ch - sd->wh;
 411    else sd->wy = y;
 412 }
 413
 414 static void
 415 _smart_anim_start(Evas_Object *obj)
 416 {
 417    evas_object_smart_callback_call(obj, "animate,start", NULL);
 418 }
 419
 420 static void
 421 _smart_anim_stop(Evas_Object *obj)
 422 {
 423    evas_object_smart_callback_call(obj, "animate,stop", NULL);
 424 }
 425
 426 static void
 427 _smart_drag_start(Evas_Object *obj)
 428 {
 429    evas_object_smart_callback_call(obj, "drag,start", NULL);
 430 }
 431
 432 static void
 433 _smart_drag_stop(Evas_Object *obj)
 434 {
 435    evas_object_smart_callback_call(obj, "drag,stop", NULL);
 436 }
 437
 438 static Eina_Bool
 439 _smart_scrollto_x_animator(void *data)
 440 {
 441    Smart_Data *sd = data;
 442    Evas_Coord px, py;
 443    double t, tt;
 444
 445    t = ecore_loop_time_get();
 446    tt = (t - sd->scrollto.x.t_start) / (sd->scrollto.x.t_end - sd->scrollto.x.t_start);
 447    tt = 1.0 - tt;
 448    tt = 1.0 - (tt * tt);
 449    sd->pan_func.get(sd->pan_obj, &px, &py);
 450    px = (sd->scrollto.x.start * (1.0 - tt)) +
 451      (sd->scrollto.x.end * tt);
 452    if (t >= sd->scrollto.x.t_end)
 453      {
 454         px = sd->scrollto.x.end;
 455         elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 456         _update_wanted_coordinates(sd, px, py);
 457         sd->scrollto.x.animator = NULL;
 458         if ((!sd->scrollto.y.animator) && (!sd->down.bounce_y_animator))
 459           _smart_anim_stop(sd->smart_obj);
 460         return ECORE_CALLBACK_CANCEL;
 461      }
 462    elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 463    _update_wanted_coordinates(sd, px, py);
 464    return ECORE_CALLBACK_RENEW;
 465 }
 466
 467 static void
 468 _smart_momentum_end(Smart_Data *sd)
 469 {
 470    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator)) return;
 471    if (sd->down.momentum_animator)
 472      {
 473         Evas_Coord px, py;
 474         elm_smart_scroller_child_pos_get(sd->smart_obj, &px, &py);
 475         _update_wanted_coordinates(sd, px, py);
 476
 477         ecore_animator_del(sd->down.momentum_animator);
 478         sd->down.momentum_animator = NULL;
 479         sd->down.bounce_x_hold = 0;
 480         sd->down.bounce_y_hold = 0;
 481         sd->down.ax = 0;
 482         sd->down.ay = 0;
 483         sd->down.dx = 0;
 484         sd->down.dy = 0;
 485         sd->down.pdx = 0;
 486         sd->down.pdy = 0;
 487      }
 488 }
 489
 490 static void
 491 _smart_scrollto_x(Smart_Data *sd, double t_in, Evas_Coord pos_x)
 492 {
 493    Evas_Coord px, py, x, y, w, h;
 494    double t;
 495
 496    if (sd->freeze) return;
 497    if (t_in <= 0.0)
 498      {
 499         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 500         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 501         x = pos_x;
 502         elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 503         return;
 504      }
 505    t = ecore_loop_time_get();
 506    sd->pan_func.get(sd->pan_obj, &px, &py);
 507    sd->scrollto.x.start = px;
 508    sd->scrollto.x.end = pos_x;
 509    sd->scrollto.x.t_start = t;
 510    sd->scrollto.x.t_end = t + t_in;
 511    if (!sd->scrollto.x.animator)
 512      {
 513         sd->scrollto.x.animator = ecore_animator_add(_smart_scrollto_x_animator, sd);
 514         if (!sd->scrollto.y.animator)
 515           _smart_anim_start(sd->smart_obj);
 516      }
 517    if (sd->down.bounce_x_animator)
 518      {
 519         ecore_animator_del(sd->down.bounce_x_animator);
 520         sd->down.bounce_x_animator = NULL;
 521         _smart_momentum_end(sd);
 522      }
 523    sd->bouncemex = 0;
 524 }
 525
 526 static Eina_Bool
 527 _smart_scrollto_y_animator(void *data)
 528 {
 529    Smart_Data *sd = data;
 530    Evas_Coord px, py;
 531    double t, tt;
 532
 533    t = ecore_loop_time_get();
 534    tt = (t - sd->scrollto.y.t_start) / (sd->scrollto.y.t_end - sd->scrollto.y.t_start);
 535    tt = 1.0 - tt;
 536    tt = 1.0 - (tt * tt);
 537    sd->pan_func.get(sd->pan_obj, &px, &py);
 538    py = (sd->scrollto.y.start * (1.0 - tt)) +
 539      (sd->scrollto.y.end * tt);
 540    if (t >= sd->scrollto.y.t_end)
 541      {
 542         py = sd->scrollto.y.end;
 543         elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 544         _update_wanted_coordinates(sd, px, py);
 545         sd->scrollto.y.animator = NULL;
 546         if ((!sd->scrollto.x.animator) && (!sd->down.bounce_x_animator))
 547           _smart_anim_stop(sd->smart_obj);
 548         return ECORE_CALLBACK_CANCEL;
 549      }
 550    elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 551    _update_wanted_coordinates(sd, px, py);
 552
 553    return ECORE_CALLBACK_RENEW;
 554 }
 555
 556 static void
 557 _smart_scrollto_y(Smart_Data *sd, double t_in, Evas_Coord pos_y)
 558 {
 559    Evas_Coord px, py, x, y, w, h;
 560    double t;
 561
 562    if (sd->freeze) return;
 563    if (t_in <= 0.0)
 564      {
 565         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 566         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 567         y = pos_y;
 568         elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 569         return;
 570      }
 571    t = ecore_loop_time_get();
 572    sd->pan_func.get(sd->pan_obj, &px, &py);
 573    sd->scrollto.y.start = py;
 574    sd->scrollto.y.end = pos_y;
 575    sd->scrollto.y.t_start = t;
 576    sd->scrollto.y.t_end = t + t_in;
 577    if (!sd->scrollto.y.animator)
 578      {
 579         sd->scrollto.y.animator = ecore_animator_add(_smart_scrollto_y_animator, sd);
 580         if (!sd->scrollto.x.animator)
 581           _smart_anim_start(sd->smart_obj);
 582      }
 583    if (sd->down.bounce_y_animator)
 584      {
 585         ecore_animator_del(sd->down.bounce_y_animator);
 586         sd->down.bounce_y_animator = NULL;
 587         _smart_momentum_end(sd);
 588      }
 589    sd->bouncemey = 0;
 590 }
 591
 592 static Eina_Bool
 593 _smart_do_page(Smart_Data *sd)
 594 {
 595    if ((sd->pagerel_h == 0.0) && (!sd->pagesize_h) &&
 596        (sd->pagerel_v == 0.0) && (!sd->pagesize_v))
 597      return EINA_FALSE;
 598    return EINA_TRUE;
 599 }
 600
 601 static Evas_Coord
 602 _smart_page_x_get(Smart_Data *sd, int offset)
 603 {
 604    Evas_Coord x, y, w, h, cw, ch, minx = 0;
 605
 606    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 607    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 608    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 609    sd->pan_func.min_get(sd->pan_obj, &minx, NULL);
 610
 611    x += offset;
 612
 613    if (sd->pagerel_h > 0.0)
 614      {
 615         x = x + (w * sd->pagerel_h * 0.5);
 616         x = x / (w * sd->pagerel_h);
 617         x = x * (w * sd->pagerel_h);
 618      }
 619    else if (sd->pagesize_h > 0)
 620      {
 621         x = x + (sd->pagesize_h * 0.5);
 622         x = x / (sd->pagesize_h);
 623         x = x * (sd->pagesize_h);
 624      }
 625    if ((x + w) > cw) x = cw - w;
 626    if (x < minx) x = minx;
 627    return x;
 628 }
 629
 630 static Evas_Coord
 631 _smart_page_y_get(Smart_Data *sd, int offset)
 632 {
 633    Evas_Coord x, y, w, h, cw, ch, miny = 0;
 634
 635    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 636    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 637    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 638    sd->pan_func.min_get(sd->pan_obj, NULL, &miny);
 639
 640    y += offset;
 641
 642    if (sd->pagerel_v > 0.0)
 643      {
 644         y = y + (h * sd->pagerel_v * 0.5);
 645         y = y / (h * sd->pagerel_v);
 646         y = y * (h * sd->pagerel_v);
 647      }
 648    else if (sd->pagesize_v > 0)
 649      {
 650         y = y + (sd->pagesize_v * 0.5);
 651         y = y / (sd->pagesize_v);
 652         y = y * (sd->pagesize_v);
 653      }
 654    if ((y + h) > ch) y = ch - h;
 655    if (y < miny) y = miny;
 656    return y;
 657 }
 658
 659 static void
 660 _smart_page_adjust(Smart_Data *sd)
 661 {
 662    Evas_Coord x, y, w, h;
 663
 664    if (!_smart_do_page(sd)) return;
 665
 666    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 667
 668    x = _smart_page_x_get(sd, 0);
 669    y = _smart_page_y_get(sd, 0);
 670
 671    elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 672 }
 673
 674 static Eina_Bool
 675 _smart_bounce_x_animator(void *data)
 676 {
 677    Smart_Data *sd;
 678    Evas_Coord x, y, dx, w, odx, ed, md;
 679    double t, p, dt, pd, r;
 680
 681    sd = data;
 682    t = ecore_loop_time_get();
 683    dt = t - sd->down.anim_start2;
 684    if (dt >= 0.0)
 685      {
 686         dt = dt / _elm_config->thumbscroll_bounce_friction;
 687         odx = sd->down.b2x - sd->down.bx;
 688         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, NULL);
 689         if (!sd->down.momentum_animator && (w > abs(odx)))
 690           {
 691              pd = (double)odx / (double)w;
 692              pd = (pd > 0) ? pd : -pd;
 693              pd = 1.0 - ((1.0 - pd) * (1.0 - pd));
 694              dt = dt / pd;
 695           }
 696         if (dt > 1.0) dt = 1.0;
 697         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 698         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 699         dx = (odx * p);
 700         r = 1.0;
 701         if (sd->down.momentum_animator)
 702           {
 703              ed = abs(sd->down.dx * (_elm_config->thumbscroll_friction + sd->down.extra_time) - sd->down.b0x);
 704              md = abs(_elm_config->thumbscroll_friction*5*w);
 705              if (ed > md) r = (double)(md)/(double)ed;
 706           }
 707         x = sd->down.b2x + (int)((double)(dx - odx)*r);
 708         if (!sd->down.cancelled)
 709           elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 710         if (dt >= 1.0)
 711           {
 712              if (sd->down.momentum_animator)
 713                sd->down.bounce_x_hold = 1;
 714              else if ((!sd->down.bounce_y_animator) &&
 715                       (!sd->scrollto.y.animator))
 716                _smart_anim_stop(sd->smart_obj);
 717              sd->down.bounce_x_animator = NULL;
 718              sd->down.pdx = 0;
 719              sd->bouncemex = 0;
 720              _smart_momentum_end(sd);
 721              return ECORE_CALLBACK_CANCEL;
 722           }
 723      }
 724    return ECORE_CALLBACK_RENEW;
 725 }
 726
 727 static Eina_Bool
 728 _smart_bounce_y_animator(void *data)
 729 {
 730    Smart_Data *sd;
 731    Evas_Coord x, y, dy, h, ody, ed, md;
 732    double t, p, dt, pd, r;
 733
 734    sd = data;
 735    t = ecore_loop_time_get();
 736    dt = t - sd->down.anim_start3;
 737    if (dt >= 0.0)
 738      {
 739         dt = dt / _elm_config->thumbscroll_bounce_friction;
 740         ody = sd->down.b2y - sd->down.by;
 741         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, NULL, &h);
 742         if (!sd->down.momentum_animator && (h > abs(ody)))
 743           {
 744              pd = (double)ody / (double)h;
 745              pd = (pd > 0) ? pd : -pd;
 746              pd = 1.0 - ((1.0 - pd) * (1.0 - pd));
 747              dt = dt / pd;
 748           }
 749         if (dt > 1.0) dt = 1.0;
 750         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 751         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 752         dy = (ody * p);
 753         r = 1.0;
 754         if (sd->down.momentum_animator)
 755           {
 756              ed = abs(sd->down.dy * (_elm_config->thumbscroll_friction + sd->down.extra_time) - sd->down.b0y);
 757              md = abs(_elm_config->thumbscroll_friction*5*h);
 758              if (ed > md) r = (double)(md)/(double)ed;
 759           }
 760         y = sd->down.b2y + (int)((double)(dy - ody)*r);
 761         if (!sd->down.cancelled)
 762           elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 763         if (dt >= 1.0)
 764           {
 765              if (sd->down.momentum_animator)
 766                sd->down.bounce_y_hold = 1;
 767              else if ((!sd->down.bounce_x_animator) &&
 768                  (!sd->scrollto.y.animator))
 769                _smart_anim_stop(sd->smart_obj);
 770              sd->down.bounce_y_animator = NULL;
 771              sd->down.pdy = 0;
 772              sd->bouncemey = 0;
 773              _smart_momentum_end(sd);
 774              return ECORE_CALLBACK_CANCEL;
 775           }
 776      }
 777    return ECORE_CALLBACK_RENEW;
 778 }
 779
 780 #define LEFT 0
 781 #define RIGHT 1
 782 #define UP 2
 783 #define DOWN 3
 784 static Eina_Bool
 785 can_scroll(Smart_Data *sd, int dir)
 786 {
 787    Evas_Coord mx = 0, my = 0, px = 0, py = 0, minx = 0, miny = 0;
 788
 789    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 790    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 791    sd->pan_func.get(sd->pan_obj, &px, &py);
 792    switch (dir)
 793      {
 794      case LEFT:
 795         if (px > minx) return EINA_TRUE;
 796         break;
 797      case RIGHT:
 798         if ((px - minx) < mx) return EINA_TRUE;
 799         break;
 800      case UP:
 801         if (py > miny) return EINA_TRUE;
 802         break;
 803      case DOWN:
 804         if ((py - miny) < my) return EINA_TRUE;
 805         break;
 806      default:
 807         break;
 808      }
 809    return EINA_FALSE;
 810 }
 811
 812 static Eina_Bool
 813 _smart_momentum_animator(void *data)
 814 {
 815    Smart_Data *sd;
 816    double t, dt, p;
 817    Evas_Coord x, y, dx, dy, px, py, maxx, maxy, minx, miny;
 818    Eina_Bool no_bounce_x_end = EINA_FALSE, no_bounce_y_end = EINA_FALSE;
 819
 820    sd = data;
 821    t = ecore_loop_time_get();
 822    dt = t - sd->down.anim_start;
 823    if (dt >= 0.0)
 824      {
 825         /*
 826         if (sd->down.hold_parent)
 827           {
 828              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
 829                {
 830                   sd->down.dir_x = 0;
 831                }
 832              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
 833                {
 834                   sd->down.dir_y = 0;
 835                   }
 836                   }
 837                   if ((!sd->down.dir_x) && (!sd->down.dir_y))
 838                   {
 839                   sd->down.cancelled = 1;
 840                   }
 841          */
 842         dt = dt / (_elm_config->thumbscroll_friction + sd->down.extra_time);
 843         if (dt > 1.0) dt = 1.0;
 844         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 845         dx = (sd->down.dx * (_elm_config->thumbscroll_friction + sd->down.extra_time) * p);
 846         dy = (sd->down.dy * (_elm_config->thumbscroll_friction + sd->down.extra_time) * p);
 847         sd->down.ax = dx;
 848         sd->down.ay = dy;
 849         x = sd->down.sx - dx;
 850         y = sd->down.sy - dy;
 851         elm_smart_scroller_child_pos_get(sd->smart_obj, &px, &py);
 852         if ((sd->down.bounce_x_animator) ||
 853             (sd->down.bounce_x_hold))
 854           {
 855              sd->down.bx = sd->down.bx0 - dx + sd->down.b0x;
 856              x = px;
 857           }
 858         if ((sd->down.bounce_y_animator) ||
 859             (sd->down.bounce_y_hold))
 860           {
 861              sd->down.by = sd->down.by0 - dy + sd->down.b0y;
 862              y = py;
 863           }
 864         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 865         _update_wanted_coordinates(sd, x, y);
 866         sd->pan_func.max_get(sd->pan_obj, &maxx, &maxy);
 867         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 868         if (!sd->bounce_horiz)
 869           {
 870              if (x <= minx) no_bounce_x_end = EINA_TRUE;
 871              if ((x - minx) >= maxx) no_bounce_x_end = EINA_TRUE;
 872           }
 873         if (!sd->bounce_vert)
 874           {
 875              if (y <= miny) no_bounce_y_end = EINA_TRUE;
 876              if ((y - miny) >= maxy) no_bounce_y_end = EINA_TRUE;
 877           }
 878         if ((dt >= 1.0) ||
 879             ((sd->down.bounce_x_hold) && (sd->down.bounce_y_hold)) ||
 880             (no_bounce_x_end && no_bounce_y_end))
 881           {
 882              _smart_anim_stop(sd->smart_obj);
 883
 884              sd->down.momentum_animator = NULL;
 885              sd->down.bounce_x_hold = 0;
 886              sd->down.bounce_y_hold = 0;
 887              sd->down.ax = 0;
 888              sd->down.ay = 0;
 889              sd->down.pdx = 0;
 890              sd->down.pdy = 0;
 891              return ECORE_CALLBACK_CANCEL;
 892           }
 893      }
 894    return ECORE_CALLBACK_RENEW;
 895 }
 896
 897 static void
 898 bounce_eval(Smart_Data *sd)
 899 {
 900    Evas_Coord mx, my, px, py, bx, by, b2x, b2y, minx = 0, miny = 0;
 901
 902    if (sd->freeze) return;
 903    if ((!sd->bouncemex) && (!sd->bouncemey)) return;
 904    if (sd->down.now) return; // down bounce while still held down
 905    if (sd->down.onhold_animator)
 906      {
 907         ecore_animator_del(sd->down.onhold_animator);
 908         sd->down.onhold_animator = NULL;
 909      }
 910    if (sd->down.hold_animator)
 911      {
 912         ecore_animator_del(sd->down.hold_animator);
 913         sd->down.hold_animator = NULL;
 914      }
 915    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 916    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 917    sd->pan_func.get(sd->pan_obj, &px, &py);
 918    bx = px;
 919    by = py;
 920    if (px < minx) px = minx;
 921    if ((px - minx) > mx) px = mx + minx;
 922    if (py < miny) py = miny;
 923    if ((py - miny) > my) py = my + miny;
 924    b2x = px;
 925    b2y = py;
 926    if ((!sd->widget) ||
 927        (!elm_widget_drag_child_locked_x_get(sd->widget)))
 928      {
 929         if ((!sd->down.bounce_x_animator) && (!sd->bounce_animator_disabled))
 930           {
 931              if (sd->bouncemex)
 932                {
 933                   if (sd->scrollto.x.animator)
 934                     {
 935                        ecore_animator_del(sd->scrollto.x.animator);
 936                        sd->scrollto.x.animator = NULL;
 937                     }
 938                   sd->down.bounce_x_animator = ecore_animator_add(_smart_bounce_x_animator, sd);
 939                   sd->down.anim_start2 = ecore_loop_time_get();
 940                   sd->down.bx = bx;
 941                   sd->down.bx0 = bx;
 942                   sd->down.b2x = b2x;
 943                   if (sd->down.momentum_animator) sd->down.b0x = sd->down.ax;
 944                   else sd->down.b0x = 0;
 945                }
 946           }
 947      }
 948    if ((!sd->widget) ||
 949        (!elm_widget_drag_child_locked_y_get(sd->widget)))
 950      {
 951         if ((!sd->down.bounce_y_animator) && (!sd->bounce_animator_disabled))
 952           {
 953              if (sd->bouncemey)
 954                {
 955                   if (sd->scrollto.y.animator)
 956                     {
 957                        ecore_animator_del(sd->scrollto.y.animator);
 958                        sd->scrollto.y.animator = NULL;
 959                     }
 960                   sd->down.bounce_y_animator = ecore_animator_add(_smart_bounce_y_animator, sd);
 961                   sd->down.anim_start3 = ecore_loop_time_get();
 962                   sd->down.by = by;
 963                   sd->down.by0 = by;
 964                   sd->down.b2y = b2y;
 965                   if (sd->down.momentum_animator) sd->down.b0y = sd->down.ay;
 966                   else sd->down.b0y = 0;
 967                }
 968           }
 969      }
 970 }
 971
 972 void
 973 elm_smart_scroller_child_pos_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
 974 {
 975    Evas_Coord mx = 0, my = 0, px = 0, py = 0, minx = 0, miny = 0;
 976    double vx, vy;
 977
 978    API_ENTRY return;
 979    // FIXME: allow for bounce outside of range
 980    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 981    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 982    if (mx > 0) vx = (double)(x - minx) / (double)mx;
 983    else vx = 0.0;
 984    if (vx < 0.0) vx = 0.0;
 985    else if (vx > 1.0) vx = 1.0;
 986    if (my > 0) vy = (double)(y - miny) / (double)my;
 987    else vy = 0.0;
 988    if (vy < 0.0) vy = 0.0;
 989    else if (vy > 1.0) vy = 1.0;
 990    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, vy);
 991    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", vx, 0.0);
 992    sd->pan_func.get(sd->pan_obj, &px, &py);
 993    if (!_elm_config->thumbscroll_bounce_enable)
 994      {
 995         if (x < minx) x = minx;
 996         if ((x - minx) > mx) x = mx + minx;
 997         if (y < miny) y = miny;
 998         if ((y - miny) > my) y = my + miny;
 999      }
1000
1001    if (!sd->bounce_horiz)
1002      {
1003         if (x < minx) x = minx;
1004         if ((x - minx) > mx) x = mx + minx;
1005      }
1006    if (!sd->bounce_vert)
1007      {
1008         if (y < miny) y = miny;
1009         if (y - miny > my) y = my + miny;
1010      }
1011
1012    sd->pan_func.set(sd->pan_obj, x, y);
1013    if ((px != x) || (py != y))
1014      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
1015    if (!sd->down.bounce_x_animator)
1016      {
1017         if (((x < minx) && (0 <= sd->down.dx)) ||
1018             ((x > (mx + minx)) && (0 >= sd->down.dx)))
1019           {
1020              sd->bouncemex = 1;
1021              bounce_eval(sd);
1022           }
1023         else
1024            sd->bouncemex = 0;
1025      }
1026    if (!sd->down.bounce_y_animator)
1027      {
1028         if (((y < miny) && (0 <= sd->down.dy)) ||
1029             ((y > (my + miny)) && (0 >= sd->down.dy)))
1030           {
1031              sd->bouncemey = 1;
1032              bounce_eval(sd);
1033           }
1034         else
1035            sd->bouncemey = 0;
1036      }
1037    if ((x != px) || (y != py))
1038      {
1039         evas_object_smart_callback_call(obj, "scroll", NULL);
1040      }
1041    if ((x != px)/* && (!sd->bouncemex)*/)
1042      {
1043         if (x == minx)
1044           evas_object_smart_callback_call(obj, "edge,left", NULL);
1045         if (x == (mx + minx))
1046           evas_object_smart_callback_call(obj, "edge,right", NULL);
1047      }
1048    if ((y != py)/* && (!sd->bouncemey)*/)
1049      {
1050         if (y == miny)
1051           evas_object_smart_callback_call(obj, "edge,top", NULL);
1052         if (y == my + miny)
1053           evas_object_smart_callback_call(obj, "edge,bottom", NULL);
1054      }
1055 }
1056
1057 void
1058 elm_smart_scroller_child_pos_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1059 {
1060    API_ENTRY return;
1061    sd->pan_func.get(sd->pan_obj, x, y);
1062 }
1063
1064 /* returns TRUE when we need to move the scroller, FALSE otherwise.
1065  * Updates w and h either way, so save them if you need them. */
1066 static Eina_Bool
1067 _elm_smart_scroller_child_region_show_internal(Evas_Object *obj, Evas_Coord *_x, Evas_Coord *_y, Evas_Coord w, Evas_Coord h)
1068 {
1069    Evas_Coord mx = 0, my = 0, cw = 0, ch = 0, px = 0, py = 0, nx, ny, minx = 0, miny = 0, pw = 0, ph = 0, x = *_x, y = *_y;
1070
1071    API_ENTRY return EINA_FALSE;
1072    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
1073    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1074    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
1075    sd->pan_func.get(sd->pan_obj, &px, &py);
1076    evas_object_geometry_get(sd->pan_obj, NULL, NULL, &pw, &ph);
1077
1078    nx = px;
1079    if ((x < px) && ((x + w) < (px + (cw - mx)))) nx = x;
1080    else if ((x > px) && ((x + w) > (px + (cw - mx)))) nx = x + w - (cw - mx);
1081    ny = py;
1082    if ((y < py) && ((y + h) < (py + (ch - my)))) ny = y;
1083    else if ((y > py) && ((y + h) > (py + (ch - my)))) ny = y + h - (ch - my);
1084
1085    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1086        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1087      {
1088         _smart_anim_stop(sd->smart_obj);
1089      }
1090    if (sd->scrollto.x.animator)
1091      {
1092         ecore_animator_del(sd->scrollto.x.animator);
1093         sd->scrollto.x.animator = NULL;
1094      }
1095    if (sd->scrollto.y.animator)
1096      {
1097         ecore_animator_del(sd->scrollto.y.animator);
1098         sd->scrollto.y.animator = NULL;
1099      }
1100    if (sd->down.bounce_x_animator)
1101      {
1102         ecore_animator_del(sd->down.bounce_x_animator);
1103         sd->down.bounce_x_animator = NULL;
1104         sd->bouncemex = 0;
1105      }
1106    if (sd->down.bounce_y_animator)
1107      {
1108         ecore_animator_del(sd->down.bounce_y_animator);
1109         sd->down.bounce_y_animator = NULL;
1110         sd->bouncemey = 0;
1111      }
1112    if (sd->down.hold_animator)
1113      {
1114         ecore_animator_del(sd->down.hold_animator);
1115         sd->down.hold_animator = NULL;
1116         _smart_drag_stop(sd->smart_obj);
1117      }
1118    if (sd->down.momentum_animator)
1119      {
1120         ecore_animator_del(sd->down.momentum_animator);
1121         sd->down.momentum_animator = NULL;
1122         sd->down.bounce_x_hold = 0;
1123         sd->down.bounce_y_hold = 0;
1124         sd->down.ax = 0;
1125         sd->down.ay = 0;
1126         sd->down.pdx = 0;
1127         sd->down.pdy = 0;
1128      }
1129
1130    x = nx;
1131    if ((x + pw) > cw) x = cw - pw;
1132    if (x < minx) x = minx;
1133    y = ny;
1134    if ((y + ph) > ch) y = ch - ph;
1135    if (y < miny) y = miny;
1136
1137    if ((x == px) && (y == py)) return EINA_FALSE;
1138    *_x = x;
1139    *_y = y;
1140    return EINA_TRUE;
1141 }
1142
1143 /* Set should be used for calculated positions, for example, when we move
1144  * because of an animation or because this is the correct position after
1145  * constraints. */
1146 void
1147 elm_smart_scroller_child_region_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1148 {
1149    if (_elm_smart_scroller_child_region_show_internal(obj, &x, &y, w, h))
1150       elm_smart_scroller_child_pos_set(obj, x, y);
1151 }
1152
1153 /* Set should be used for setting the wanted position, for example a user scroll
1154  * or moving the cursor in an entry. */
1155 void
1156 elm_smart_scroller_child_region_show(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1157 {
1158    API_ENTRY return;
1159    sd->wx = x;
1160    sd->wy = y;
1161    sd->ww = w;
1162    sd->wh = h;
1163    if (_elm_smart_scroller_child_region_show_internal(obj, &x, &y, w, h))
1164       elm_smart_scroller_child_pos_set(obj, x, y);
1165 }
1166
1167 void
1168 elm_smart_scroller_child_viewport_size_get(Evas_Object *obj, Evas_Coord *w, Evas_Coord *h)
1169 {
1170    API_ENTRY return;
1171    if (!sd->pan_obj) return;
1172    edje_object_calc_force(sd->edje_obj);
1173    evas_object_geometry_get(sd->pan_obj, NULL, NULL, w, h);
1174 }
1175
1176 void
1177 elm_smart_scroller_step_size_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
1178 {
1179    API_ENTRY return;
1180    if (x < 1) x = 1;
1181    if (y < 1) y = 1;
1182    sd->step.x = x;
1183    sd->step.y = y;
1184    _smart_scrollbar_size_adjust(sd);
1185 }
1186
1187 void
1188 elm_smart_scroller_step_size_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1189 {
1190    API_ENTRY return;
1191    if (x) *x = sd->step.x;
1192    if (y) *y = sd->step.y;
1193 }
1194
1195 void
1196 elm_smart_scroller_page_size_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
1197 {
1198    API_ENTRY return;
1199    sd->page.x = x;
1200    sd->page.y = y;
1201    _smart_scrollbar_size_adjust(sd);
1202 }
1203
1204 void
1205 elm_smart_scroller_page_size_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1206 {
1207    API_ENTRY return;
1208    if (x) *x = sd->page.x;
1209    if (y) *y = sd->page.y;
1210 }
1211
1212 void
1213 elm_smart_scroller_policy_set(Evas_Object *obj, Elm_Smart_Scroller_Policy hbar, Elm_Smart_Scroller_Policy vbar)
1214 {
1215    API_ENTRY return;
1216    if ((sd->hbar_flags == hbar) && (sd->vbar_flags == vbar)) return;
1217    sd->hbar_flags = hbar;
1218    sd->vbar_flags = vbar;
1219    if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
1220      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,hbar", "elm");
1221    else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
1222      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
1223    else
1224      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,hbar", "elm");
1225    if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
1226      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,vbar", "elm");
1227    else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
1228      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
1229    else
1230      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,vbar", "elm");
1231    _smart_scrollbar_size_adjust(sd);
1232 }
1233
1234 void
1235 elm_smart_scroller_policy_get(Evas_Object *obj, Elm_Smart_Scroller_Policy *hbar, Elm_Smart_Scroller_Policy *vbar)
1236 {
1237    API_ENTRY return;
1238    if (hbar) *hbar = sd->hbar_flags;
1239    if (vbar) *vbar = sd->vbar_flags;
1240 }
1241
1242 Evas_Object *
1243 elm_smart_scroller_edje_object_get(Evas_Object *obj)
1244 {
1245    API_ENTRY return NULL;
1246    return sd->edje_obj;
1247 }
1248
1249 void
1250 elm_smart_scroller_single_dir_set(Evas_Object *obj, Eina_Bool single_dir)
1251 {
1252    API_ENTRY return;
1253    sd->one_dir_at_a_time = single_dir;
1254 }
1255
1256 Eina_Bool
1257 elm_smart_scroller_single_dir_get(Evas_Object *obj)
1258 {
1259    API_ENTRY return EINA_FALSE;
1260    return sd->one_dir_at_a_time;
1261 }
1262
1263 void
1264 elm_smart_scroller_propagate_events_set(Evas_Object *obj, Eina_Bool propagation)
1265 {
1266    API_ENTRY return;
1267    sd->event_propagation = propagation;
1268
1269    evas_object_propagate_events_set(sd->edje_obj, propagation);
1270 }
1271
1272 Eina_Bool
1273 elm_smart_scroller_propagate_events_get(Evas_Object *obj)
1274 {
1275    API_ENTRY return EINA_FALSE;
1276    return sd->event_propagation;
1277 }
1278
1279 void
1280 elm_smart_scroller_object_theme_set(Evas_Object *parent, Evas_Object *obj, const char *clas, const char *group, const char *style)
1281 {
1282    API_ENTRY return;
1283    Evas_Coord mw, mh;
1284    //Does this API require parent object absolutely? if then remove this exception.
1285    double parent_scale = parent ? elm_widget_scale_get(parent) : 1;
1286    _elm_theme_object_set(parent, sd->edje_obj, clas, group, style);
1287    edje_object_scale_set(sd->edje_obj, parent_scale * _elm_config->scale);
1288    if (sd->pan_obj)
1289      edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
1290    mw = mh = -1;
1291    elm_coords_finger_size_adjust(1, &mw, 1, &mh);
1292    if (edje_object_part_exists(sd->edje_obj, "elm.scrollbar.base"))
1293      {
1294         Evas_Object *base;
1295         base = edje_object_part_swallow_get(sd->edje_obj, "elm.scrollbar.base");
1296         if (!base)
1297           {
1298              base = evas_object_rectangle_add(evas_object_evas_get(sd->edje_obj));
1299              evas_object_color_set(base, 0, 0, 0, 0);
1300              edje_object_part_swallow(sd->edje_obj, "elm.scrollbar.base", base);
1301           }
1302         if (!_elm_config->thumbscroll_enable)
1303            evas_object_size_hint_min_set(base, mw, mh);
1304      }
1305    sd->vbar_visible = !sd->vbar_visible;
1306    sd->hbar_visible = !sd->hbar_visible;
1307    _smart_scrollbar_bar_visibility_adjust(sd);
1308 }
1309
1310 void
1311 elm_smart_scroller_hold_set(Evas_Object *obj, Eina_Bool hold)
1312 {
1313    API_ENTRY return;
1314    sd->hold = hold;
1315 }
1316
1317 void
1318 elm_smart_scroller_freeze_set(Evas_Object *obj, Eina_Bool freeze)
1319 {
1320    API_ENTRY return;
1321    sd->freeze = freeze;
1322    if (sd->freeze)
1323      {
1324         if (sd->down.onhold_animator)
1325           {
1326              ecore_animator_del(sd->down.onhold_animator);
1327              sd->down.onhold_animator = NULL;
1328           }
1329      }
1330    else
1331      bounce_eval(sd);
1332 }
1333
1334 void
1335 elm_smart_scroller_bounce_allow_set(Evas_Object *obj, Eina_Bool horiz, Eina_Bool vert)
1336 {
1337    API_ENTRY return;
1338    sd->bounce_horiz = horiz;
1339    sd->bounce_vert = vert;
1340 }
1341
1342 void
1343 elm_smart_scroller_bounce_allow_get(const Evas_Object *obj, Eina_Bool *horiz, Eina_Bool *vert)
1344 {
1345    API_ENTRY return;
1346    if (horiz) *horiz = sd->bounce_horiz;
1347    if (vert) *vert = sd->bounce_vert;
1348 }
1349
1350 void
1351 elm_smart_scroller_paging_set(Evas_Object *obj, double pagerel_h, double pagerel_v, Evas_Coord pagesize_h, Evas_Coord pagesize_v)
1352 {
1353    API_ENTRY return;
1354    sd->pagerel_h = pagerel_h;
1355    sd->pagerel_v = pagerel_v;
1356    sd->pagesize_h = pagesize_h;
1357    sd->pagesize_v = pagesize_v;
1358    _smart_page_adjust(sd);
1359 }
1360
1361 void
1362 elm_smart_scroller_paging_get(Evas_Object *obj, double *pagerel_h, double *pagerel_v, Evas_Coord *pagesize_h, Evas_Coord *pagesize_v)
1363 {
1364    API_ENTRY return;
1365    if(pagerel_h) *pagerel_h = sd->pagerel_h;
1366    if(pagerel_v) *pagerel_v = sd->pagerel_v;
1367    if(pagesize_h) *pagesize_h = sd->pagesize_h;
1368    if(pagesize_v) *pagesize_v = sd->pagesize_v;
1369 }
1370
1371 void
1372 elm_smart_scroller_region_bring_in(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1373 {
1374    API_ENTRY return;
1375    if (_elm_smart_scroller_child_region_show_internal(obj, &x, &y, w, h))
1376      {
1377         _smart_scrollto_x(sd, _elm_config->bring_in_scroll_friction, x);
1378         _smart_scrollto_y(sd, _elm_config->bring_in_scroll_friction, y);
1379      }
1380 }
1381
1382 void
1383 elm_smart_scroller_widget_set(Evas_Object *obj, Evas_Object *wid)
1384 {
1385    API_ENTRY return;
1386    sd->widget = wid;
1387 }
1388
1389 static void
1390 _elm_smart_scroller_wanted_region_set(Evas_Object *obj)
1391 {
1392    INTERNAL_ENTRY;
1393    Evas_Coord ww, wh, wx = sd->wx;
1394
1395    if (sd->down.now || sd->down.momentum_animator ||
1396        sd->down.bounce_x_animator || sd->down.bounce_y_animator ||
1397        sd->down.hold_animator || sd->down.onhold_animator) return;
1398
1399    /* Flip to RTL cords only if init in RTL mode */
1400    if(sd->is_mirrored)
1401      wx = _elm_smart_scroller_x_mirrored_get(obj, sd->wx);
1402
1403    if (sd->ww == -1)
1404      {
1405         elm_smart_scroller_child_viewport_size_get(obj, &ww, &wh);
1406      }
1407    else
1408      {
1409         ww = sd->ww;
1410         wh = sd->wh;
1411      }
1412
1413    elm_smart_scroller_child_region_set(obj, wx, sd->wy, ww, wh);
1414 }
1415
1416 /* local subsystem functions */
1417 static void
1418 _smart_edje_drag_v_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1419 {
1420    Smart_Data *sd;
1421
1422    sd = data;
1423    _smart_scrollbar_read(sd);
1424    _smart_drag_start(sd->smart_obj);
1425    sd->freeze = EINA_TRUE;
1426 }
1427
1428 static void
1429 _smart_edje_drag_v_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1430 {
1431    Smart_Data *sd;
1432
1433    sd = data;
1434    _smart_scrollbar_read(sd);
1435    _smart_drag_stop(sd->smart_obj);
1436    sd->freeze = EINA_FALSE;
1437 }
1438
1439 static void
1440 _smart_edje_drag_v(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1441 {
1442    Smart_Data *sd;
1443
1444    sd = data;
1445    _smart_scrollbar_read(sd);
1446 }
1447
1448 static void
1449 _smart_edje_drag_h_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1450 {
1451    Smart_Data *sd;
1452
1453    sd = data;
1454    _smart_scrollbar_read(sd);
1455    _smart_drag_start(sd->smart_obj);
1456    sd->freeze = EINA_TRUE;
1457 }
1458
1459 static void
1460 _smart_edje_drag_h_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1461 {
1462    Smart_Data *sd;
1463
1464    sd = data;
1465    _smart_scrollbar_read(sd);
1466    _smart_drag_stop(sd->smart_obj);
1467    sd->freeze = EINA_FALSE;
1468 }
1469
1470 static void
1471 _smart_edje_drag_h(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1472 {
1473    Smart_Data *sd;
1474
1475    sd = data;
1476    _smart_scrollbar_read(sd);
1477 }
1478
1479 static void
1480 _smart_child_del_hook(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1481 {
1482    Smart_Data *sd;
1483
1484    sd = data;
1485    sd->child_obj = NULL;
1486    _smart_scrollbar_size_adjust(sd);
1487    _smart_scrollbar_reset(sd);
1488 }
1489
1490 static void
1491 _smart_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1492 {
1493    Evas_Coord w, h;
1494    Smart_Data *sd;
1495
1496    sd = data;
1497    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
1498    if ((w != sd->child.w) || (h != sd->child.h))
1499      {
1500         sd->child.w = w;
1501         sd->child.h = h;
1502         _smart_scrollbar_size_adjust(sd);
1503         evas_object_size_hint_min_set(sd->smart_obj, sd->child.w, sd->child.h);
1504         _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1505      }
1506 }
1507
1508 static void
1509 _smart_pan_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1510 {
1511    Smart_Data *sd;
1512
1513    sd = data;
1514    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1515        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1516      {
1517         _smart_anim_stop(sd->smart_obj);
1518      }
1519    if (sd->scrollto.x.animator)
1520      {
1521         ecore_animator_del(sd->scrollto.x.animator);
1522         sd->scrollto.x.animator = NULL;
1523      }
1524    if (sd->scrollto.y.animator)
1525      {
1526         ecore_animator_del(sd->scrollto.y.animator);
1527         sd->scrollto.y.animator = NULL;
1528      }
1529    if (sd->down.bounce_x_animator)
1530      {
1531         ecore_animator_del(sd->down.bounce_x_animator);
1532         sd->down.bounce_x_animator = NULL;
1533         sd->bouncemex = 0;
1534      }
1535    if (sd->down.bounce_y_animator)
1536      {
1537         ecore_animator_del(sd->down.bounce_y_animator);
1538         sd->down.bounce_y_animator = NULL;
1539         sd->bouncemey = 0;
1540      }
1541    _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1542 }
1543
1544 void
1545 elm_smart_scroller_gravity_set(Evas_Object *obj, double x, double y)
1546 {
1547    API_ENTRY return;
1548
1549    sd->pan_func.gravity_set(sd->pan_obj, x, y);
1550 }
1551
1552 void
1553 elm_smart_scroller_gravity_get(Evas_Object *obj, double *x, double *y)
1554 {
1555    API_ENTRY return;
1556
1557    sd->pan_func.gravity_get(sd->pan_obj, x, y);
1558 }
1559
1560 static void
1561 _smart_event_wheel(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1562 {
1563    Evas_Event_Mouse_Wheel *ev;
1564    Smart_Data *sd;
1565    Evas_Coord x = 0, y = 0;
1566
1567    sd = data;
1568    ev = event_info;
1569    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1570    if ((evas_key_modifier_is_set(ev->modifiers, "Control")) ||
1571        (evas_key_modifier_is_set(ev->modifiers, "Alt")) ||
1572        (evas_key_modifier_is_set(ev->modifiers, "Shift")) ||
1573        (evas_key_modifier_is_set(ev->modifiers, "Meta")) ||
1574        (evas_key_modifier_is_set(ev->modifiers, "Hyper")) ||
1575        (evas_key_modifier_is_set(ev->modifiers, "Super")))
1576      return;
1577    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1578    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1579        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1580      {
1581         _smart_anim_stop(sd->smart_obj);
1582      }
1583    if (sd->scrollto.x.animator)
1584      {
1585         ecore_animator_del(sd->scrollto.x.animator);
1586         sd->scrollto.x.animator = NULL;
1587      }
1588    if (sd->scrollto.y.animator)
1589      {
1590         ecore_animator_del(sd->scrollto.y.animator);
1591         sd->scrollto.y.animator = NULL;
1592      }
1593    if (sd->down.bounce_x_animator)
1594      {
1595         ecore_animator_del(sd->down.bounce_x_animator);
1596         sd->down.bounce_x_animator = NULL;
1597         sd->bouncemex = 0;
1598      }
1599    if (sd->down.bounce_y_animator)
1600      {
1601         ecore_animator_del(sd->down.bounce_y_animator);
1602         sd->down.bounce_y_animator = NULL;
1603         sd->bouncemey = 0;
1604      }
1605    if (!ev->direction)
1606      y += ev->z * sd->step.y;
1607    else if (ev->direction == 1)
1608      x += ev->z * sd->step.x;
1609
1610    if ((!sd->hold) && (!sd->freeze))
1611      {
1612         _update_wanted_coordinates(sd, x, y);
1613         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1614      }
1615 }
1616
1617 static void
1618 _smart_event_mouse_down(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1619 {
1620    Evas_Event_Mouse_Down *ev;
1621    Smart_Data *sd;
1622    Evas_Coord x = 0, y = 0;
1623
1624    sd = data;
1625    ev = event_info;
1626    //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1627    if (_elm_config->thumbscroll_enable)
1628      {
1629         sd->down.hold = 0;
1630         if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1631             (sd->down.momentum_animator) || (sd->scrollto.x.animator) ||
1632             (sd->scrollto.y.animator))
1633           {
1634              ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL | EVAS_EVENT_FLAG_ON_HOLD;
1635              sd->down.scroll = 1;
1636              sd->down.hold = 1;
1637              _smart_anim_stop(sd->smart_obj);
1638           }
1639         if (sd->scrollto.x.animator)
1640           {
1641              ecore_animator_del(sd->scrollto.x.animator);
1642              sd->scrollto.x.animator = NULL;
1643           }
1644         if (sd->scrollto.y.animator)
1645           {
1646              ecore_animator_del(sd->scrollto.y.animator);
1647              sd->scrollto.y.animator = NULL;
1648           }
1649         if (sd->down.bounce_x_animator)
1650           {
1651              ecore_animator_del(sd->down.bounce_x_animator);
1652              sd->down.bounce_x_animator = NULL;
1653              sd->bouncemex = 0;
1654           }
1655         if (sd->down.bounce_y_animator)
1656           {
1657              ecore_animator_del(sd->down.bounce_y_animator);
1658              sd->down.bounce_y_animator = NULL;
1659              sd->bouncemey = 0;
1660           }
1661         if (sd->down.hold_animator)
1662           {
1663              ecore_animator_del(sd->down.hold_animator);
1664              sd->down.hold_animator = NULL;
1665              _smart_drag_stop(sd->smart_obj);
1666           }
1667         if (sd->down.momentum_animator)
1668           {
1669              ecore_animator_del(sd->down.momentum_animator);
1670              sd->down.momentum_animator = NULL;
1671              sd->down.bounce_x_hold = 0;
1672              sd->down.bounce_y_hold = 0;
1673              sd->down.ax = 0;
1674              sd->down.ay = 0;
1675           }
1676         if (ev->button == 1)
1677           {
1678              sd->down.hist.est_timestamp_diff =
1679                 ecore_loop_time_get() - ((double)ev->timestamp / 1000.0);
1680              sd->down.hist.tadd = 0.0;
1681              sd->down.hist.dxsum = 0.0;
1682              sd->down.hist.dysum = 0.0;
1683              sd->down.now = 1;
1684              sd->down.dragged = 0;
1685              sd->down.dir_x = 0;
1686              sd->down.dir_y = 0;
1687              sd->down.x = ev->canvas.x;
1688              sd->down.y = ev->canvas.y;
1689              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1690              sd->down.sx = x;
1691              sd->down.sy = y;
1692              sd->down.locked = 0;
1693              memset(&(sd->down.history[0]), 0, sizeof(sd->down.history[0]) * 60);
1694 #ifdef EVTIME
1695              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
1696              sd->down.history[0].localtimestamp = ecore_loop_time_get();
1697 #else
1698              sd->down.history[0].timestamp = ecore_loop_time_get();
1699 #endif
1700              sd->down.history[0].x = ev->canvas.x;
1701              sd->down.history[0].y = ev->canvas.y;
1702           }
1703         sd->down.dragged_began = 0;
1704         sd->down.hold_parent = 0;
1705         sd->down.cancelled = 0;
1706         if(sd->hold || sd->freeze)
1707            sd->down.want_reset = 1;
1708         else
1709            sd->down.want_reset = 0;
1710      }
1711 }
1712
1713 static void
1714 _down_coord_eval(Smart_Data *sd, Evas_Coord *x, Evas_Coord *y)
1715 {
1716    Evas_Coord minx, miny;
1717
1718    if (sd->down.dir_x) *x = sd->down.sx - (*x - sd->down.x);
1719    else *x = sd->down.sx;
1720    if (sd->down.dir_y) *y = sd->down.sy - (*y - sd->down.y);
1721    else *y = sd->down.sy;
1722
1723    if ((sd->down.dir_x) || (sd->down.dir_y))
1724      {
1725         if (!((sd->down.dir_x) && (sd->down.dir_y)))
1726           {
1727              if (sd->down.dir_x) *y = sd->down.locked_y;
1728              else *x = sd->down.locked_x;
1729           }
1730      }
1731
1732    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1733
1734    if (*x < minx)
1735       *x += (minx - *x) * _elm_config->thumbscroll_border_friction;
1736    else if (sd->child.w <= sd->w)
1737       *x += (sd->down.sx - *x) * _elm_config->thumbscroll_border_friction;
1738    else if ((sd->child.w - sd->w + minx) < *x)
1739       *x += (sd->child.w - sd->w + minx - *x) *
1740       _elm_config->thumbscroll_border_friction;
1741
1742    if (*y < miny)
1743       *y += (miny - *y) * _elm_config->thumbscroll_border_friction;
1744    else if (sd->child.h <= sd->h)
1745       *y += (sd->down.sy - *y) * _elm_config->thumbscroll_border_friction;
1746    else if ((sd->child.h - sd->h + miny) < *y)
1747       *y += (sd->child.h - sd->h + miny - *y) *
1748       _elm_config->thumbscroll_border_friction;
1749 }
1750
1751 static Eina_Bool
1752 _smart_hold_animator(void *data)
1753 {
1754    Smart_Data *sd = data;
1755    Evas_Coord ox = 0, oy = 0, fx = 0, fy= 0;
1756
1757    fx = sd->down.hold_x;
1758    fy = sd->down.hold_y;
1759
1760    if ((!sd->hold) && (!sd->freeze) && (_elm_config->scroll_smooth_time_interval > 0.0))
1761      {
1762         int i, count = 0; //count for the real event number we have to deal with
1763         int queue_size = 10; //for event queue size
1764         int src_index = 0, dst_index = 0;
1765         int xsum = 0, ysum=0;
1766         Evas_Coord  x=0, y=0;
1767
1768         struct {
1769              Evas_Coord x, y;
1770              double t;
1771         } pos[queue_size];
1772
1773         double tdiff, tnow;
1774         double time_interval=_elm_config->scroll_smooth_time_interval;
1775         // FIXME: assume server and client have the same "timezone"
1776         // (0 timepoint) for now. this needs to be figured out in advance
1777         // though.
1778         tdiff = sd->down.hist.est_timestamp_diff;
1779         tnow = ecore_time_get() - tdiff;
1780
1781         for(i = 0; i < queue_size; i++)
1782           {
1783              x = sd->down.history[i].x;
1784              y = sd->down.history[i].y;
1785
1786              //if there is no history value , we don't deal with it
1787              //if there is better wat to know existance of history value , I will modify this code to it
1788              if ( (x == 0) && (y == 0) )
1789                {
1790                   break;
1791                }
1792              _down_coord_eval(sd, &x, &y);
1793
1794              pos[i].x = x;
1795              pos[i].y = y;
1796              pos[i].t = tnow - sd->down.history[i].timestamp;
1797           }
1798         count = --i;
1799
1800         // we only deal with smooth scroll there is enough history
1801         for(i = 0; i < queue_size; i++)
1802           {
1803              if (src_index > count) break;
1804              if (i == 0)
1805                {
1806                   xsum = pos[i].x;
1807                   ysum = pos[i].y;
1808                   dst_index++;
1809                   continue;
1810                }
1811              while ((pos[src_index].t < time_interval *i) &&
1812                      (src_index <= count))
1813                {
1814                   src_index++;
1815                }
1816              if (src_index <= count)
1817                {
1818                   xsum += pos[src_index].x;
1819                   ysum += pos[src_index].y;
1820                   dst_index++;
1821                }
1822           }
1823         fx = xsum / dst_index;
1824         fy = ysum / dst_index;
1825      }
1826
1827    elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
1828    if (sd->down.dir_x)
1829      {
1830         if ((!sd->widget) ||
1831             (!elm_widget_drag_child_locked_x_get(sd->widget)))
1832           {
1833              ox = fx;
1834           }
1835      }
1836    if (sd->down.dir_y)
1837      {
1838         if ((!sd->widget) ||
1839             (!elm_widget_drag_child_locked_y_get(sd->widget)))
1840           {
1841              oy = fy;
1842           }
1843      }
1844    elm_smart_scroller_child_pos_set(sd->smart_obj, ox, oy);
1845    return ECORE_CALLBACK_RENEW;
1846 }
1847
1848 static Eina_Bool
1849 _smart_event_post_up(void *data, Evas *e __UNUSED__)
1850 {
1851    Smart_Data *sd = data;
1852    if (sd->widget)
1853      {
1854         if (sd->down.dragged)
1855           {
1856              elm_widget_drag_lock_x_set(sd->widget, 0);
1857              elm_widget_drag_lock_y_set(sd->widget, 0);
1858           }
1859      }
1860    return EINA_TRUE;
1861 }
1862
1863 static void
1864 _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
1865 {
1866    Evas_Event_Mouse_Down *ev;
1867    Smart_Data *sd;
1868    Evas_Coord x = 0, y = 0, ox = 0, oy = 0;
1869    Evas_Coord vw, vh, aw, ah;
1870
1871    sd = data;
1872    ev = event_info;
1873    sd->down.hold_parent = 0;
1874    sd->down.dx = 0;
1875    sd->down.dy = 0;
1876    //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1877    evas_post_event_callback_push(e, _smart_event_post_up, sd);
1878    // FIXME: respect elm_widget_scroll_hold_get of parent container
1879    if (_elm_config->thumbscroll_enable)
1880      {
1881         if (ev->button == 1)
1882           {
1883              if (sd->down.onhold_animator)
1884                {
1885                   ecore_animator_del(sd->down.onhold_animator);
1886                   sd->down.onhold_animator = NULL;
1887                }
1888              x = ev->canvas.x - sd->down.x;
1889              y = ev->canvas.y - sd->down.y;
1890              if (sd->down.dragged)
1891                {
1892                   _smart_drag_stop(sd->smart_obj);
1893                   if ((!sd->hold) && (!sd->freeze))
1894                     {
1895                        double t, at, dt;
1896                        int i;
1897                        Evas_Coord ax, ay, dx, dy, vel;
1898
1899 #ifdef EVTIME
1900                        t = ev->timestamp / 1000.0;
1901 #else
1902                        t = ecore_loop_time_get();
1903 #endif
1904                        ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1905                        ax = ev->canvas.x;
1906                        ay = ev->canvas.y;
1907                        at = 0.0;
1908 #ifdef SCROLLDBG
1909                        printf("------ %i %i\n", ev->canvas.x, ev->canvas.y);
1910 #endif
1911                        for (i = 0; i < 60; i++)
1912                          {
1913                             dt = t - sd->down.history[i].timestamp;
1914                             if (dt > 0.2) break;
1915 #ifdef SCROLLDBG
1916                             printf("H: %i %i @ %1.3f\n",
1917                                    sd->down.history[i].x,
1918                                    sd->down.history[i].y, dt);
1919 #endif
1920                             at += dt;
1921                             ax += sd->down.history[i].x;
1922                             ay += sd->down.history[i].y;
1923                          }
1924                        ax /= (i + 1);
1925                        ay /= (i + 1);
1926                        at /= (i + 1);
1927                        at /= _elm_config->thumbscroll_sensitivity_friction;
1928                        dx = ev->canvas.x - ax;
1929                        dy = ev->canvas.y - ay;
1930                        if (at > 0)
1931                          {
1932                             vel = sqrt((dx * dx) + (dy * dy)) / at;
1933                             if ((_elm_config->thumbscroll_friction > 0.0) &&
1934                                 (vel > _elm_config->thumbscroll_momentum_threshold))
1935                               {
1936                                  int minx, miny, mx, my, px, py;
1937                                  sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1938                                  sd->pan_func.max_get(sd->pan_obj, &mx, &my);
1939                                  sd->pan_func.get(sd->pan_obj, &px, &py);
1940                                  sd->down.dx = ((double)dx / at);
1941                                  sd->down.dy = ((double)dy / at);
1942                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1943                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)))
1944                                    if (px > minx && px < mx)
1945                                      sd->down.dx += (double)sd->down.pdx * 1.5; // FIXME: * 1.5 - probably should be config
1946                                  if (((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1947                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1948                                    if (py > miny && py < my)
1949                                      sd->down.dy += (double)sd->down.pdy * 1.5; // FIXME: * 1.5 - probably should be config
1950                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1951                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)) ||
1952                                      ((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1953                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1954                                    {
1955                                       double t = ecore_loop_time_get();
1956                                       double dt = t - sd->down.anim_start;
1957
1958                                       if (dt < 0.0) dt = 0.0;
1959                                       else if (dt > _elm_config->thumbscroll_friction)
1960                                         dt = _elm_config->thumbscroll_friction;
1961                                       sd->down.extra_time = _elm_config->thumbscroll_friction - dt;
1962                                    }
1963                                  else
1964                                    sd->down.extra_time = 0.0;
1965                                  elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &vw, &vh);
1966                                  aw = abs(sd->down.dx);
1967                                  if (aw  > vw*3)
1968                                    {
1969                                       if (sd->down.dx > 0) sd->down.dx = vw*3;
1970                                       else sd->down.dx = -(vw*3);
1971                                    }
1972                                  ah = abs(sd->down.dy);
1973                                  if (ah  > vh*3)
1974                                    {
1975                                       if (sd->down.dy > 0) sd->down.dy = vh*3;
1976                                       else sd->down.dy = -(vh*3);
1977                                    }
1978                                  sd->down.pdx = sd->down.dx;
1979                                  sd->down.pdy = sd->down.dy;
1980                                  ox = -sd->down.dx;
1981                                  oy = -sd->down.dy;
1982                                  if (!_smart_do_page(sd))
1983                                    {
1984                                       if ((!sd->down.momentum_animator) && (!sd->momentum_animator_disabled))
1985                                         {
1986                                            sd->down.momentum_animator = ecore_animator_add(_smart_momentum_animator, sd);
1987                                            ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1988                                            _smart_anim_start(sd->smart_obj);
1989                                         }
1990                                       sd->down.anim_start = ecore_loop_time_get();
1991                                       elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1992                                       sd->down.sx = x;
1993                                       sd->down.sy = y;
1994                                       sd->down.b0x = 0;
1995                                       sd->down.b0y = 0;
1996                                    }
1997                               }
1998                          }
1999                     }
2000                   else
2001                     {
2002                        sd->down.pdx = 0;
2003                        sd->down.pdy = 0;
2004                     }
2005                   evas_event_feed_hold(e, 0, ev->timestamp, ev->data);
2006                   if (_smart_do_page(sd))
2007                     {
2008                        Evas_Coord pgx, pgy;
2009
2010                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
2011                        if ((!sd->widget) ||
2012                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
2013                          {
2014                             pgx = _smart_page_x_get(sd, ox);
2015                             if (pgx != x)
2016                               {
2017                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
2018                                  _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
2019                               }
2020                          }
2021                        if ((!sd->widget) ||
2022                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
2023                          {
2024                             pgy = _smart_page_y_get(sd, oy);
2025                             if (pgy != y)
2026                               {
2027                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
2028                                  _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
2029                               }
2030                          }
2031                     }
2032                }
2033              else
2034                {
2035                   sd->down.pdx = 0;
2036                   sd->down.pdy = 0;
2037                   if (_smart_do_page(sd))
2038                     {
2039                        Evas_Coord pgx, pgy;
2040
2041                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
2042                        if ((!sd->widget) ||
2043                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
2044                          {
2045                             pgx = _smart_page_x_get(sd, ox);
2046                             if (pgx != x) _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
2047                          }
2048                        if ((!sd->widget) ||
2049                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
2050                          {
2051                             pgy = _smart_page_y_get(sd, oy);
2052                             if (pgy != y) _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
2053                          }
2054                     }
2055                }
2056              if (sd->down.hold_animator)
2057                {
2058                   ecore_animator_del(sd->down.hold_animator);
2059                   sd->down.hold_animator = NULL;
2060                }
2061              if (sd->down.scroll)
2062                {
2063                   ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
2064                   sd->down.scroll = 0;
2065                }
2066              if (sd->down.hold)
2067                {
2068                   ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2069                   sd->down.hold = 0;
2070                }
2071              sd->down.dragged_began = 0;
2072              sd->down.dir_x = 0;
2073              sd->down.dir_y = 0;
2074              sd->down.want_dragged = 0;
2075              sd->down.dragged = 0;
2076              sd->down.now = 0;
2077              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
2078              elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2079              _update_wanted_coordinates(sd, x, y);
2080
2081              if (!_smart_do_page(sd))
2082                bounce_eval(sd);
2083           }
2084      }
2085 }
2086
2087 static Eina_Bool
2088 _smart_onhold_animator(void *data)
2089 {
2090    Smart_Data *sd;
2091    double t, td;
2092    double vx, vy;
2093    Evas_Coord x, y, ox, oy;
2094
2095    sd = data;
2096    t = ecore_loop_time_get();
2097    if (sd->down.onhold_tlast > 0.0)
2098      {
2099         td = t - sd->down.onhold_tlast;
2100         vx = sd->down.onhold_vx * td * (double)_elm_config->thumbscroll_threshold * 2.0;
2101         vy = sd->down.onhold_vy * td * (double)_elm_config->thumbscroll_threshold * 2.0;
2102         elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
2103         x = ox;
2104         y = oy;
2105
2106         if (sd->down.dir_x)
2107           {
2108              if ((!sd->widget) ||
2109                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
2110                {
2111                   sd->down.onhold_vxe += vx;
2112                   x = ox + (int)sd->down.onhold_vxe;
2113                   sd->down.onhold_vxe -= (int)sd->down.onhold_vxe;
2114                }
2115           }
2116
2117         if (sd->down.dir_y)
2118           {
2119              if ((!sd->widget) ||
2120                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
2121                {
2122                   sd->down.onhold_vye += vy;
2123                   y = oy + (int)sd->down.onhold_vye;
2124                   sd->down.onhold_vye -= (int)sd->down.onhold_vye;
2125                }
2126           }
2127
2128         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2129      }
2130    sd->down.onhold_tlast = t;
2131    return ECORE_CALLBACK_RENEW;
2132 }
2133
2134 static Eina_Bool
2135 _smart_event_post_move(void *data, Evas *e __UNUSED__)
2136 {
2137    Smart_Data *sd = data;
2138
2139    if (sd->down.want_dragged)
2140      {
2141         int start = 0;
2142
2143         if (sd->down.hold_parent)
2144           {
2145              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
2146                {
2147                   sd->down.dir_x = 0;
2148                }
2149              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
2150                {
2151                   sd->down.dir_y = 0;
2152                }
2153           }
2154         if (sd->down.dir_x)
2155           {
2156              if ((!sd->widget) ||
2157                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
2158                {
2159                   sd->down.want_dragged = 0;
2160                   sd->down.dragged = 1;
2161                   if (sd->widget)
2162                     {
2163                        elm_widget_drag_lock_x_set(sd->widget, 1);
2164                     }
2165                   start = 1;
2166                }
2167              else
2168                sd->down.dir_x = 0;
2169           }
2170         if (sd->down.dir_y)
2171           {
2172              if ((!sd->widget) ||
2173                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
2174                {
2175                   sd->down.want_dragged = 0;
2176                   sd->down.dragged = 1;
2177                   if (sd->widget)
2178                     {
2179                        elm_widget_drag_lock_y_set(sd->widget, 1);
2180                     }
2181                   start = 1;
2182                }
2183              else
2184                sd->down.dir_y = 0;
2185           }
2186         if ((!sd->down.dir_x) && (!sd->down.dir_y))
2187           {
2188              sd->down.cancelled = 1;
2189           }
2190         if (start) _smart_drag_start(sd->smart_obj);
2191      }
2192    return EINA_TRUE;
2193 }
2194
2195 static void
2196 _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
2197 {
2198    Evas_Event_Mouse_Move *ev;
2199    Smart_Data *sd;
2200    Evas_Coord x = 0, y = 0;
2201
2202    sd = data;
2203    ev = event_info;
2204    //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
2205    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) sd->down.hold_parent = 1;
2206    evas_post_event_callback_push(e, _smart_event_post_move, sd);
2207    // FIXME: respect elm_widget_scroll_hold_get of parent container
2208    if (_elm_config->thumbscroll_enable)
2209      {
2210         if (sd->down.now)
2211           {
2212              int dodir = 0;
2213
2214 #ifdef SCROLLDBG
2215              printf("::: %i %i\n", ev->cur.canvas.x, ev->cur.canvas.y);
2216 #endif
2217              memmove(&(sd->down.history[1]), &(sd->down.history[0]),
2218                      sizeof(sd->down.history[0]) * (60 - 1));
2219 #ifdef EVTIME
2220              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
2221              sd->down.history[0].localtimestamp = ecore_loop_time_get();
2222 #else
2223              sd->down.history[0].timestamp = ecore_loop_time_get();
2224 #endif
2225              sd->down.history[0].x = ev->cur.canvas.x;
2226              sd->down.history[0].y = ev->cur.canvas.y;
2227
2228              if (!sd->down.dragged_began)
2229                {
2230                   x = ev->cur.canvas.x - sd->down.x;
2231                   y = ev->cur.canvas.y - sd->down.y;
2232
2233                   sd->down.hdir = -1;
2234                   sd->down.vdir = -1;
2235
2236                   if      (x > 0) sd->down.hdir = LEFT;
2237                   else if (x < 0) sd->down.hdir = RIGHT;
2238                   if      (y > 0) sd->down.vdir = UP;
2239                   else if (y < 0) sd->down.vdir = DOWN;
2240
2241                   if (x < 0) x = -x;
2242                   if (y < 0) y = -y;
2243
2244                   if ((sd->one_dir_at_a_time) &&
2245                       (!((sd->down.dir_x) || (sd->down.dir_y))))
2246                     {
2247                        if (x > _elm_config->thumbscroll_threshold)
2248                          {
2249                             if (x > (y * 2))
2250                               {
2251                                  sd->down.dir_x = 1;
2252                                  sd->down.dir_y = 0;
2253                                  dodir++;
2254                               }
2255                          }
2256                        if (y > _elm_config->thumbscroll_threshold)
2257                          {
2258                             if (y > (x * 2))
2259                               {
2260                                  sd->down.dir_x = 0;
2261                                  sd->down.dir_y = 1;
2262                                  dodir++;
2263                               }
2264                          }
2265                        if (!dodir)
2266                          {
2267                             sd->down.dir_x = 1;
2268                             sd->down.dir_y = 1;
2269                          }
2270                     }
2271                   else
2272                     {
2273                        //                       can_scroll(sd, LEFT);
2274                        //                       can_scroll(sd, RIGHT);
2275                        //                       can_scroll(sd, UP);
2276                        //                       can_scroll(sd, DOWN);
2277                        sd->down.dir_x = 1;
2278                        sd->down.dir_y = 1;
2279                     }
2280                }
2281              if ((!sd->hold) && (!sd->freeze))
2282                {
2283                   if ((sd->down.dragged) ||
2284                       (((x * x) + (y * y)) >
2285                        (_elm_config->thumbscroll_threshold *
2286                         _elm_config->thumbscroll_threshold)))
2287                     {
2288                        sd->down.dragged_began = 1;
2289                        if (!sd->down.dragged)
2290                          {
2291                             sd->down.want_dragged = 1;
2292                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2293                             //                            evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2294                             //                            _smart_drag_start(sd->smart_obj);
2295                          }
2296                        if (sd->down.dragged)
2297                          {
2298                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2299                          }
2300                        //                       ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2301                        //                       sd->down.dragged = 1;
2302                        if (sd->down.dir_x)
2303                          x = sd->down.sx - (ev->cur.canvas.x - sd->down.x);
2304                        else
2305                          x = sd->down.sx;
2306                        if (sd->down.dir_y)
2307                          y = sd->down.sy - (ev->cur.canvas.y - sd->down.y);
2308                        else
2309                          y = sd->down.sy;
2310                        if(sd->down.want_reset)
2311                          {
2312                             sd->down.x = ev->cur.canvas.x;
2313                             sd->down.y = ev->cur.canvas.y;
2314                             sd->down.want_reset = 0;
2315                          }
2316                        if ((sd->down.dir_x) || (sd->down.dir_y))
2317                          {
2318                             if (!sd->down.locked)
2319                               {
2320                                  sd->down.locked_x = x;
2321                                  sd->down.locked_y = y;
2322                                  sd->down.locked = 1;
2323                               }
2324                             if (!((sd->down.dir_x) && (sd->down.dir_y)))
2325                               {
2326                                  if (sd->down.dir_x) y = sd->down.locked_y;
2327                                  else x = sd->down.locked_x;
2328                               }
2329                          }
2330                          {
2331                             Evas_Coord minx, miny;
2332                             sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2333                             if (y < miny)
2334                               y += (miny - y) *
2335                                  _elm_config->thumbscroll_border_friction;
2336                             else if (sd->child.h <= sd->h)
2337                               y += (sd->down.sy - y) *
2338                                  _elm_config->thumbscroll_border_friction;
2339                             else if ((sd->child.h - sd->h + miny) < y)
2340                               y += (sd->child.h - sd->h + miny - y) *
2341                                  _elm_config->thumbscroll_border_friction;
2342                             if (x < minx)
2343                               x += (minx - x) *
2344                                  _elm_config->thumbscroll_border_friction;
2345                             else if (sd->child.w <= sd->w)
2346                               x += (sd->down.sx - x) *
2347                                  _elm_config->thumbscroll_border_friction;
2348                             else if ((sd->child.w - sd->w + minx) < x)
2349                               x += (sd->child.w - sd->w + minx - x) *
2350                                  _elm_config->thumbscroll_border_friction;
2351                          }
2352
2353                        sd->down.hold_x = x;
2354                        sd->down.hold_y = y;
2355                        if (!sd->down.hold_animator)
2356                          sd->down.hold_animator =
2357                             ecore_animator_add(_smart_hold_animator, sd);
2358                        //                       printf("a %i %i\n", sd->down.hold_x, sd->down.hold_y);
2359                        //                       _smart_onhold_animator(sd);
2360                        //                       elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2361                     }
2362                   else
2363                     {
2364                        if (sd->down.dragged_began)
2365                          {
2366                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2367                             if (!sd->down.hold)
2368                               {
2369                                  sd->down.hold = 1;
2370                                  evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2371                               }
2372                          }
2373                     }
2374                }
2375              else if (!sd->freeze)
2376                {
2377                   Evas_Coord ex, ey, ew, eh;
2378                   double vx = 0.0, vy = 0.0;
2379
2380                   evas_object_geometry_get(sd->event_obj, &ex, &ey, &ew, &eh);
2381                   x = ev->cur.canvas.x - ex;
2382                   y = ev->cur.canvas.y - ey;
2383                   if (x < _elm_config->thumbscroll_threshold)
2384                     {
2385                        if (_elm_config->thumbscroll_threshold > 0.0)
2386                          vx = -(double)(_elm_config->thumbscroll_threshold - x) /
2387                             _elm_config->thumbscroll_threshold;
2388                        else
2389                          vx = -1.0;
2390                     }
2391                   else if (x > (ew - _elm_config->thumbscroll_threshold))
2392                     {
2393                        if (_elm_config->thumbscroll_threshold > 0.0)
2394                          vx = (double)(_elm_config->thumbscroll_threshold - (ew - x)) /
2395                             _elm_config->thumbscroll_threshold;
2396                        else
2397                          vx = 1.0;
2398                     }
2399                   if (y < _elm_config->thumbscroll_threshold)
2400                     {
2401                        if (_elm_config->thumbscroll_threshold > 0.0)
2402                          vy = -(double)(_elm_config->thumbscroll_threshold - y) /
2403                             _elm_config->thumbscroll_threshold;
2404                        else
2405                          vy = -1.0;
2406                     }
2407                   else if (y > (eh - _elm_config->thumbscroll_threshold))
2408                     {
2409                        if (_elm_config->thumbscroll_threshold > 0.0)
2410                          vy = (double)(_elm_config->thumbscroll_threshold - (eh - y)) /
2411                             _elm_config->thumbscroll_threshold;
2412                        else
2413                          vy = 1.0;
2414                     }
2415                   if ((vx != 0.0) || (vy != 0.0))
2416                     {
2417                        sd->down.onhold_vx = vx;
2418                        sd->down.onhold_vy = vy;
2419                        if (!sd->down.onhold_animator)
2420                          {
2421                             sd->down.onhold_vxe = 0.0;
2422                             sd->down.onhold_vye = 0.0;
2423                             sd->down.onhold_tlast = 0.0;
2424                             sd->down.onhold_animator = ecore_animator_add(_smart_onhold_animator, sd);
2425                          }
2426                        //                       printf("b %i %i\n", sd->down.hold_x, sd->down.hold_y);
2427                     }
2428                   else
2429                     {
2430                        if (sd->down.onhold_animator)
2431                          {
2432                             ecore_animator_del(sd->down.onhold_animator);
2433                             sd->down.onhold_animator = NULL;
2434                          }
2435                     }
2436                }
2437           }
2438      }
2439 }
2440
2441 static void
2442 _smart_scrollbar_read(Smart_Data *sd)
2443 {
2444    Evas_Coord x, y, mx = 0, my = 0, px, py, minx = 0, miny = 0;
2445    double vx, vy;
2446
2447    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2448    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2449    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2450    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2451    x = vx * (double)mx + minx;
2452    y = vy * (double)my + miny;
2453    sd->pan_func.get(sd->pan_obj, &px, &py);
2454    sd->pan_func.set(sd->pan_obj, x, y);
2455    if ((px != x) || (py != y))
2456      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2457 }
2458
2459 static void
2460 _smart_scrollbar_reset(Smart_Data *sd)
2461 {
2462    Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2463
2464    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2465    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2466    if ((!sd->child_obj) && (!sd->extern_pan))
2467      {
2468         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2469         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2470      }
2471    if (sd->pan_obj)
2472      {
2473         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2474         sd->pan_func.get(sd->pan_obj, &px, &py);
2475         sd->pan_func.set(sd->pan_obj, minx, miny);
2476      }
2477    if ((px != minx) || (py != miny))
2478      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2479 }
2480
2481 static int
2482 _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd)
2483 {
2484    int scroll_v_vis_change = 0;
2485    Evas_Coord h, vw = 0, vh = 0;
2486
2487    h = sd->child.h;
2488    if (sd->pan_obj)
2489      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2490    if (sd->vbar_visible)
2491      {
2492         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2493           {
2494              if ((sd->child_obj) || (sd->extern_pan))
2495                {
2496                   if (h <= vh)
2497                     {
2498                        scroll_v_vis_change = 1;
2499                        sd->vbar_visible = 0;
2500                     }
2501                }
2502              else
2503                {
2504                   scroll_v_vis_change = 1;
2505                   sd->vbar_visible = 0;
2506                }
2507           }
2508         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2509           {
2510              scroll_v_vis_change = 1;
2511              sd->vbar_visible = 0;
2512           }
2513      }
2514    else
2515      {
2516         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2517           {
2518              if ((sd->child_obj) || (sd->extern_pan))
2519                {
2520                   if (h > vh)
2521                     {
2522                        scroll_v_vis_change = 1;
2523                        sd->vbar_visible = 1;
2524                     }
2525                }
2526           }
2527         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2528           {
2529              scroll_v_vis_change = 1;
2530              sd->vbar_visible = 1;
2531           }
2532      }
2533    if (scroll_v_vis_change)
2534      {
2535         if (sd->vbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2536           {
2537              if (sd->vbar_visible)
2538                edje_object_signal_emit(sd->edje_obj, "elm,action,show,vbar", "elm");
2539              else
2540                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2541              edje_object_message_signal_process(sd->edje_obj);
2542              _smart_scrollbar_size_adjust(sd);
2543           }
2544         else
2545           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2546      }
2547    return scroll_v_vis_change;
2548 }
2549
2550 static int
2551 _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd)
2552 {
2553    int scroll_h_vis_change = 0;
2554    Evas_Coord w, vw = 0, vh = 0;
2555
2556    w = sd->child.w;
2557    if (sd->pan_obj)
2558      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2559    if (sd->hbar_visible)
2560      {
2561         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2562           {
2563              if ((sd->child_obj) || (sd->extern_pan))
2564                {
2565                   if (w <= vw)
2566                     {
2567                        scroll_h_vis_change = 1;
2568                        sd->hbar_visible = 0;
2569                     }
2570                }
2571              else
2572                {
2573                   scroll_h_vis_change = 1;
2574                   sd->hbar_visible = 0;
2575                }
2576           }
2577         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2578           {
2579              scroll_h_vis_change = 1;
2580              sd->hbar_visible = 0;
2581           }
2582      }
2583    else
2584      {
2585         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2586           {
2587              if ((sd->child_obj) || (sd->extern_pan))
2588                {
2589                   if (w > vw)
2590                     {
2591                        scroll_h_vis_change = 1;
2592                        sd->hbar_visible = 1;
2593                     }
2594                }
2595           }
2596         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2597           {
2598              scroll_h_vis_change = 1;
2599              sd->hbar_visible = 1;
2600           }
2601      }
2602    if (scroll_h_vis_change)
2603      {
2604         if (sd->hbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2605           {
2606              if (sd->hbar_visible)
2607                edje_object_signal_emit(sd->edje_obj, "elm,action,show,hbar", "elm");
2608              else
2609                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2610              edje_object_message_signal_process(sd->edje_obj);
2611              _smart_scrollbar_size_adjust(sd);
2612           }
2613         else
2614           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2615         _smart_scrollbar_size_adjust(sd);
2616      }
2617    return scroll_h_vis_change;
2618 }
2619
2620 static void
2621 _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd)
2622 {
2623    int changed = 0;
2624
2625    changed |= _smart_scrollbar_bar_h_visibility_adjust(sd);
2626    changed |= _smart_scrollbar_bar_v_visibility_adjust(sd);
2627    if (changed)
2628      {
2629         _smart_scrollbar_bar_h_visibility_adjust(sd);
2630         _smart_scrollbar_bar_v_visibility_adjust(sd);
2631      }
2632 }
2633
2634 static void
2635 _smart_scrollbar_size_adjust(Smart_Data *sd)
2636 {
2637    if ((sd->child_obj) || (sd->extern_pan))
2638      {
2639         Evas_Coord x, y, w, h, mx = 0, my = 0, vw = 0, vh = 0, px, py, minx = 0, miny = 0;
2640         double vx, vy, size;
2641
2642         edje_object_part_geometry_get(sd->edje_obj, "elm.swallow.content",
2643                                       NULL, NULL, &vw, &vh);
2644         w = sd->child.w;
2645         if (w < 1) w = 1;
2646         size = (double)vw / (double)w;
2647         if (size > 1.0)
2648           {
2649              size = 1.0;
2650              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2651           }
2652         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", size, 1.0);
2653
2654         h = sd->child.h;
2655         if (h < 1) h = 1;
2656         size = (double)vh / (double)h;
2657         if (size > 1.0)
2658           {
2659              size = 1.0;
2660              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2661           }
2662         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, size);
2663
2664         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2665         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2666         sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2667         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2668         x = vx * mx + minx;
2669         y = vy * my + miny;
2670
2671         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->step.x / (double)w, 0.0);
2672         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->step.y / (double)h);
2673         if (sd->page.x > 0)
2674           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->page.x / (double)w, 0.0);
2675         else
2676           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", -((double)sd->page.x * ((double)vw / (double)w)) / 100.0, 0.0);
2677         if (sd->page.y > 0)
2678           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->page.y / (double)h);
2679         else
2680           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, -((double)sd->page.y * ((double)vh / (double)h)) / 100.0);
2681
2682         sd->pan_func.get(sd->pan_obj, &px, &py);
2683         if (vx != mx) x = px;
2684         if (vy != my) y = py;
2685         sd->pan_func.set(sd->pan_obj, x, y);
2686         //      if ((px != 0) || (py != 0))
2687         //        edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2688      }
2689    else
2690      {
2691         Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2692
2693         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2694         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2695         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2696         sd->pan_func.get(sd->pan_obj, &px, &py);
2697         sd->pan_func.set(sd->pan_obj, minx, miny);
2698         if ((px != minx) || (py != miny))
2699           edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2700      }
2701    _smart_scrollbar_bar_visibility_adjust(sd);
2702 }
2703
2704 static void
2705 _smart_reconfigure(Smart_Data *sd)
2706 {
2707    evas_object_move(sd->edje_obj, sd->x, sd->y);
2708    evas_object_resize(sd->edje_obj, sd->w, sd->h);
2709    evas_object_move(sd->event_obj, sd->x, sd->y);
2710    evas_object_resize(sd->event_obj, sd->w, sd->h);
2711    _smart_scrollbar_size_adjust(sd);
2712 }
2713
2714 static void
2715 _smart_add(Evas_Object *obj)
2716 {
2717    Smart_Data *sd;
2718    Evas_Object *o;
2719
2720    sd = calloc(1, sizeof(Smart_Data));
2721    if (!sd) return;
2722    evas_object_smart_data_set(obj, sd);
2723
2724    sd->smart_obj = obj;
2725    sd->x = 0;
2726    sd->y = 0;
2727    sd->w = 0;
2728    sd->h = 0;
2729    sd->step.x = 32;
2730    sd->step.y = 32;
2731    sd->page.x = -50;
2732    sd->page.y = -50;
2733    sd->hbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2734    sd->vbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2735    sd->hbar_visible = 1;
2736    sd->vbar_visible = 1;
2737
2738    sd->bounce_horiz = 1;
2739    sd->bounce_vert = 1;
2740
2741    sd->one_dir_at_a_time = 1;
2742    sd->momentum_animator_disabled = EINA_FALSE;
2743    sd->bounce_animator_disabled = EINA_FALSE;
2744
2745    o = edje_object_add(evas_object_evas_get(obj));
2746    evas_object_propagate_events_set(o, 0);
2747    sd->edje_obj = o;
2748    elm_smart_scroller_object_theme_set(NULL, obj, "scroller", "base", "default");
2749    edje_object_signal_callback_add(o, "drag", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2750    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.vbar", _smart_edje_drag_v_start, sd);
2751    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.vbar", _smart_edje_drag_v_stop, sd);
2752    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2753    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2754    edje_object_signal_callback_add(o, "drag", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2755    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.hbar", _smart_edje_drag_h_start, sd);
2756    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.hbar", _smart_edje_drag_h_stop, sd);
2757    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2758    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2759    evas_object_smart_member_add(o, obj);
2760
2761    o = evas_object_rectangle_add(evas_object_evas_get(obj));
2762    sd->event_obj = o;
2763    evas_object_color_set(o, 0, 0, 0, 0);
2764    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
2765    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN, _smart_event_mouse_down, sd);
2766    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_UP, _smart_event_mouse_up, sd);
2767    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_MOVE, _smart_event_mouse_move, sd);
2768    evas_object_smart_member_add(o, obj);
2769    evas_object_repeat_events_set(o, 1);
2770
2771    sd->pan_func.set = _elm_smart_pan_set;
2772    sd->pan_func.get = _elm_smart_pan_get;
2773    sd->pan_func.max_get = _elm_smart_pan_max_get;
2774    sd->pan_func.min_get = _elm_smart_pan_min_get;
2775    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
2776
2777    _smart_scrollbar_reset(sd);
2778 }
2779
2780 static void
2781 _smart_del(Evas_Object *obj)
2782 {
2783    INTERNAL_ENTRY;
2784    elm_smart_scroller_child_set(obj, NULL);
2785    if (!sd->extern_pan) evas_object_del(sd->pan_obj);
2786    evas_object_del(sd->edje_obj);
2787    evas_object_del(sd->event_obj);
2788    if (sd->down.hold_animator) ecore_animator_del(sd->down.hold_animator);
2789    if (sd->down.onhold_animator) ecore_animator_del(sd->down.onhold_animator);
2790    if (sd->down.momentum_animator) ecore_animator_del(sd->down.momentum_animator);
2791    if (sd->down.bounce_x_animator) ecore_animator_del(sd->down.bounce_x_animator);
2792    if (sd->down.bounce_y_animator) ecore_animator_del(sd->down.bounce_y_animator);
2793    if (sd->scrollto.x.animator) ecore_animator_del(sd->scrollto.x.animator);
2794    if (sd->scrollto.y.animator) ecore_animator_del(sd->scrollto.y.animator);
2795    free(sd);
2796    evas_object_smart_data_set(obj, NULL);
2797 }
2798
2799 static void
2800 _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
2801 {
2802    INTERNAL_ENTRY;
2803    sd->x = x;
2804    sd->y = y;
2805    _smart_reconfigure(sd);
2806 }
2807
2808 static void
2809 _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
2810 {
2811    INTERNAL_ENTRY;
2812    sd->w = w;
2813    sd->h = h;
2814    _smart_reconfigure(sd);
2815    _elm_smart_scroller_wanted_region_set(obj);
2816 }
2817
2818 static void
2819 _smart_show(Evas_Object *obj)
2820 {
2821    INTERNAL_ENTRY;
2822    evas_object_show(sd->edje_obj);
2823    evas_object_show(sd->event_obj);
2824 }
2825
2826 static void
2827 _smart_hide(Evas_Object *obj)
2828 {
2829    INTERNAL_ENTRY;
2830    evas_object_hide(sd->edje_obj);
2831    evas_object_hide(sd->event_obj);
2832 }
2833
2834 static void
2835 _smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
2836 {
2837    INTERNAL_ENTRY;
2838    evas_object_color_set(sd->edje_obj, r, g, b, a);
2839 }
2840
2841 static void
2842 _smart_clip_set(Evas_Object *obj, Evas_Object *clip)
2843 {
2844    INTERNAL_ENTRY;
2845    evas_object_clip_set(sd->edje_obj, clip);
2846    evas_object_clip_set(sd->event_obj, clip);
2847 }
2848
2849 static void
2850 _smart_clip_unset(Evas_Object *obj)
2851 {
2852    INTERNAL_ENTRY;
2853    evas_object_clip_unset(sd->edje_obj);
2854    evas_object_clip_unset(sd->event_obj);
2855 }
2856
2857 /* never need to touch this */
2858
2859 static void
2860 _smart_init(void)
2861 {
2862    if (_smart) return;
2863      {
2864         static const Evas_Smart_Class sc =
2865           {
2866              SMART_NAME,
2867              EVAS_SMART_CLASS_VERSION,
2868              _smart_add,
2869              _smart_del,
2870              _smart_move,
2871              _smart_resize,
2872              _smart_show,
2873              _smart_hide,
2874              _smart_color_set,
2875              _smart_clip_set,
2876              _smart_clip_unset,
2877              NULL,
2878              NULL,
2879              NULL,
2880              NULL,
2881              NULL,
2882              NULL,
2883              NULL
2884           };
2885         _smart = evas_smart_class_new(&sc);
2886      }
2887 }