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    } down;
  72
  73    struct {
  74       Evas_Coord w, h;
  75    } child;
  76    struct {
  77       Evas_Coord x, y;
  78    } step, page;
  79
  80    struct {
  81       void (*set) (Evas_Object *obj, Evas_Coord x, Evas_Coord y);
  82       void (*get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  83       void (*max_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  84       void (*min_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  85       void (*child_size_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  86    } pan_func;
  87
  88    struct {
  89       struct {
  90          Evas_Coord start, end;
  91          double t_start, t_end;
  92          Ecore_Animator *animator;
  93       } x, y;
  94    } scrollto;
  95
  96    double pagerel_h, pagerel_v;
  97    Evas_Coord pagesize_h, pagesize_v;
  98
  99    unsigned char hbar_visible : 1;
 100    unsigned char vbar_visible : 1;
 101    unsigned char extern_pan : 1;
 102    unsigned char one_dir_at_a_time : 1;
 103    unsigned char hold : 1;
 104    unsigned char freeze : 1;
 105    unsigned char bouncemex : 1;
 106    unsigned char bouncemey : 1;
 107    unsigned char bounce_horiz : 1;
 108    unsigned char bounce_vert : 1;
 109    Eina_Bool momentum_animator_disabled :1;
 110    Eina_Bool bounce_animator_disabled :1;
 111    Eina_Bool is_mirrored : 1;
 112    Eina_Bool wheel_disabled : 1;
 113 };
 114
 115 /* local subsystem functions */
 116 static void _smart_child_del_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
 117 static void _smart_pan_changed_hook(void *data, Evas_Object *obj, void *event_info);
 118 static void _smart_pan_pan_changed_hook(void *data, Evas_Object *obj, void *event_info);
 119 static void _smart_event_wheel(void *data, Evas *e, Evas_Object *obj, void *event_info);
 120 static void _smart_event_mouse_down(void *data, Evas *e, Evas_Object *obj, void *event_info);
 121 static Eina_Bool  _smart_hold_animator(void *data);
 122 static Eina_Bool  _smart_momentum_animator(void *data);
 123 static void _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj, void *event_info);
 124 static Eina_Bool  _smart_onhold_animator(void *data);
 125 static void _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj, void *event_info);
 126 static void _smart_edje_drag_v_start(void *data, Evas_Object *obj, const char *emission, const char *source);
 127 static void _smart_edje_drag_v_stop(void *data, Evas_Object *obj, const char *emission, const char *source);
 128 static void _smart_edje_drag_v(void *data, Evas_Object *obj, const char *emission, const char *source);
 129 static void _smart_edje_drag_h_start(void *data, Evas_Object *obj, const char *emission, const char *source);
 130 static void _smart_edje_drag_h_stop(void *data, Evas_Object *obj, const char *emission, const char *source);
 131 static void _smart_edje_drag_h(void *data, Evas_Object *obj, const char *emission, const char *source);
 132 static void _smart_scrollbar_read(Smart_Data *sd);
 133 static void _smart_scrollbar_reset(Smart_Data *sd);
 134 static int  _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd);
 135 static int  _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd);
 136 static void _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd);
 137 static void _smart_scrollbar_size_adjust(Smart_Data *sd);
 138 static void _smart_reconfigure(Smart_Data *sd);
 139 static void _smart_add(Evas_Object *obj);
 140 static void _smart_del(Evas_Object *obj);
 141 static void _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
 142 static void _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
 143 static void _smart_show(Evas_Object *obj);
 144 static void _smart_hide(Evas_Object *obj);
 145 static void _smart_color_set(Evas_Object *obj, int r, int g, int b, int a);
 146 static void _smart_clip_set(Evas_Object *obj, Evas_Object *clip);
 147 static void _smart_clip_unset(Evas_Object *obj);
 148 static void _smart_init(void);
 149
 150 /* local subsystem globals */
 151 static Evas_Smart *_smart = NULL;
 152
 153 /* externally accessible functions */
 154 Evas_Object *
 155 elm_smart_scroller_add(Evas *evas)
 156 {
 157    _smart_init();
 158    return evas_object_smart_add(evas, _smart);
 159 }
 160
 161 static Evas_Coord
 162 _elm_smart_scroller_x_mirrored_get(Evas_Object *obj, Evas_Coord x)
 163 {
 164    API_ENTRY return x;
 165
 166    Evas_Coord cw, ch, w, ret;
 167    elm_smart_scroller_child_viewport_size_get(obj, &w, NULL);
 168    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 169    ret = (cw - (x + w));
 170    return (ret >= 0) ? ret : 0;
 171 }
 172
 173 void
 174 elm_smart_scroller_mirrored_set(Evas_Object *obj, Eina_Bool mirrored)
 175 {
 176    API_ENTRY return;
 177    Evas_Coord wx;
 178    if (sd->is_mirrored == mirrored)
 179      return;
 180
 181    sd->is_mirrored = mirrored;
 182    edje_object_mirrored_set(sd->edje_obj, mirrored);
 183
 184    if (sd->is_mirrored)
 185      wx = _elm_smart_scroller_x_mirrored_get(sd->smart_obj, sd->wx);
 186    else
 187      wx = sd->wx;
 188
 189    elm_smart_scroller_child_pos_set(sd->smart_obj, wx, sd->wy);
 190 }
 191
 192 void
 193 elm_smart_scroller_child_set(Evas_Object *obj, Evas_Object *child)
 194 {
 195    Evas_Coord w, h;
 196    Evas_Object *o;
 197
 198    API_ENTRY return;
 199    if (sd->child_obj)
 200      {
 201         _elm_smart_pan_child_set(sd->pan_obj, NULL);
 202         evas_object_event_callback_del_full(sd->child_obj, EVAS_CALLBACK_DEL, _smart_child_del_hook, sd);
 203      }
 204
 205    sd->child_obj = child;
 206    sd->wx = sd->wy = 0;
 207    /* (-1) means want viewports size */
 208    sd->ww = sd->wh = -1;
 209    if (!child) return;
 210
 211    if (!sd->pan_obj)
 212      {
 213         o = _elm_smart_pan_add(evas_object_evas_get(obj));
 214         sd->pan_obj = o;
 215         evas_object_smart_callback_add(o, "changed", _smart_pan_changed_hook, sd);
 216         evas_object_smart_callback_add(o, "pan_changed", _smart_pan_pan_changed_hook, sd);
 217         edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", o);
 218      }
 219
 220    sd->pan_func.set = _elm_smart_pan_set;
 221    sd->pan_func.get = _elm_smart_pan_get;
 222    sd->pan_func.max_get = _elm_smart_pan_max_get;
 223    sd->pan_func.min_get = _elm_smart_pan_min_get;
 224    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
 225
 226    evas_object_event_callback_add(child, EVAS_CALLBACK_DEL, _smart_child_del_hook, sd);
 227    _elm_smart_pan_child_set(sd->pan_obj, child);
 228    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
 229    sd->child.w = w;
 230    sd->child.h = h;
 231    _smart_scrollbar_size_adjust(sd);
 232    _smart_scrollbar_reset(sd);
 233 }
 234
 235 void
 236 elm_smart_scroller_extern_pan_set(Evas_Object *obj, Evas_Object *pan,
 237                                   void (*pan_set) (Evas_Object *obj, Evas_Coord x, Evas_Coord y),
 238                                   void (*pan_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 239                                   void (*pan_max_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 240                                   void (*pan_min_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 241                                   void (*pan_child_size_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y))
 242 {
 243    API_ENTRY return;
 244
 245    elm_smart_scroller_child_set(obj, NULL);
 246
 247    if (sd->pan_obj)
 248      {
 249         evas_object_smart_callback_del(sd->pan_obj, "changed", _smart_pan_changed_hook);
 250         evas_object_smart_callback_del(sd->pan_obj, "pan_changed", _smart_pan_pan_changed_hook);
 251      }
 252
 253    if (sd->extern_pan)
 254      {
 255         if (sd->pan_obj)
 256           {
 257              edje_object_part_unswallow(sd->edje_obj, sd->pan_obj);
 258              sd->pan_obj = NULL;
 259           }
 260      }
 261    else
 262      {
 263         if (sd->pan_obj)
 264           {
 265              evas_object_del(sd->pan_obj);
 266              sd->pan_obj = NULL;
 267           }
 268      }
 269    if (!pan)
 270      {
 271         sd->extern_pan = 0;
 272         return;
 273      }
 274
 275    sd->pan_obj = pan;
 276    sd->pan_func.set = pan_set;
 277    sd->pan_func.get = pan_get;
 278    sd->pan_func.max_get = pan_max_get;
 279    sd->pan_func.min_get = pan_min_get;
 280    sd->pan_func.child_size_get = pan_child_size_get;
 281    sd->extern_pan = 1;
 282    evas_object_smart_callback_add(sd->pan_obj, "changed", _smart_pan_changed_hook, sd);
 283    evas_object_smart_callback_add(sd->pan_obj, "pan_changed", _smart_pan_pan_changed_hook, sd);
 284    edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
 285    evas_object_show(sd->pan_obj);
 286 }
 287
 288 void
 289 elm_smart_scroller_custom_edje_file_set(Evas_Object *obj, char *file, char *group)
 290 {
 291    API_ENTRY return;
 292
 293    edje_object_file_set(sd->edje_obj, file, group);
 294    if (sd->pan_obj)
 295      edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
 296    sd->vbar_visible = !sd->vbar_visible;
 297    sd->hbar_visible = !sd->hbar_visible;
 298    _smart_scrollbar_bar_visibility_adjust(sd);
 299    if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
 300      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,hbar", "elm");
 301    else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
 302      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
 303    else
 304      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,hbar", "elm");
 305    if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
 306      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,vbar", "elm");
 307    else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
 308      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
 309    else
 310      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,vbar", "elm");
 311 }
 312
 313 Eina_Bool
 314 elm_smart_scroller_momentum_animator_disabled_get(Evas_Object *obj)
 315 {
 316    API_ENTRY return EINA_FALSE;
 317    return sd->momentum_animator_disabled;
 318 }
 319
 320 void
 321 elm_smart_scroller_momentum_animator_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 322 {
 323    API_ENTRY return;
 324    sd->momentum_animator_disabled = disabled;
 325    if (sd->momentum_animator_disabled)
 326      {
 327         if (sd->down.momentum_animator)
 328           {
 329              ecore_animator_del(sd->down.momentum_animator);
 330              sd->down.momentum_animator = NULL;
 331           }
 332      }
 333 }
 334
 335 Eina_Bool
 336 elm_smart_scroller_bounce_animator_disabled_get(Evas_Object *obj)
 337 {
 338    API_ENTRY return EINA_FALSE;
 339    return sd->bounce_animator_disabled;
 340 }
 341
 342 void
 343 elm_smart_scroller_bounce_animator_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 344 {
 345    API_ENTRY return;
 346    sd->bounce_animator_disabled = disabled;
 347    if (sd->bounce_animator_disabled)
 348      {
 349         if (sd->scrollto.x.animator)
 350           {
 351              ecore_animator_del(sd->scrollto.x.animator);
 352              sd->scrollto.x.animator = NULL;
 353           }
 354
 355         if (sd->scrollto.y.animator)
 356           {
 357              ecore_animator_del(sd->scrollto.y.animator);
 358              sd->scrollto.y.animator = NULL;
 359           }
 360      }
 361 }
 362
 363 Eina_Bool
 364 elm_smart_scroller_wheel_disabled_get(Evas_Object *obj)
 365 {
 366    API_ENTRY return EINA_FALSE;
 367    return sd->wheel_disabled;
 368 }
 369
 370 void
 371 elm_smart_scroller_wheel_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 372 {
 373    API_ENTRY return;
 374    if ((!sd->wheel_disabled) && (disabled))
 375      evas_object_event_callback_del_full(sd->event_obj, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
 376    else if ((sd->wheel_disabled) && (!disabled))
 377      evas_object_event_callback_add(sd->event_obj, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
 378    sd->wheel_disabled = disabled;
 379 }
 380
 381 /* Update the wanted coordinates according to the x, y passed
 382  * widget directionality, child size and etc. */
 383 static void
 384 _update_wanted_coordinates(Smart_Data *sd, Evas_Coord x, Evas_Coord y)
 385 {
 386    Evas_Coord cw, ch;
 387
 388    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 389
 390    /* Update wx/y/w/h - and if the requested positions aren't legal
 391     * adjust a bit. */
 392    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &sd->ww, &sd->wh);
 393    if (x < 0)
 394       sd->wx = 0;
 395    else if ((x + sd->ww) > cw)
 396       sd->wx = cw - sd->ww;
 397    else if (sd->is_mirrored)
 398       sd->wx = _elm_smart_scroller_x_mirrored_get(sd->smart_obj, x);
 399    else
 400       sd->wx = x;
 401    if (y < 0) sd->wy = 0;
 402    else if ((y + sd->wh) > ch) sd->wy = ch - sd->wh;
 403    else sd->wy = y;
 404 }
 405
 406 static void
 407 _smart_anim_start(Evas_Object *obj)
 408 {
 409    evas_object_smart_callback_call(obj, "animate,start", NULL);
 410 }
 411
 412 static void
 413 _smart_anim_stop(Evas_Object *obj)
 414 {
 415    evas_object_smart_callback_call(obj, "animate,stop", NULL);
 416 }
 417
 418 static void
 419 _smart_drag_start(Evas_Object *obj)
 420 {
 421    evas_object_smart_callback_call(obj, "drag,start", NULL);
 422 }
 423
 424 static void
 425 _smart_drag_stop(Evas_Object *obj)
 426 {
 427    evas_object_smart_callback_call(obj, "drag,stop", NULL);
 428 }
 429
 430 static Eina_Bool
 431 _smart_scrollto_x_animator(void *data)
 432 {
 433    Smart_Data *sd = data;
 434    Evas_Coord px, py;
 435    double t, tt;
 436
 437    t = ecore_loop_time_get();
 438    tt = (t - sd->scrollto.x.t_start) / (sd->scrollto.x.t_end - sd->scrollto.x.t_start);
 439    tt = 1.0 - tt;
 440    tt = 1.0 - (tt * tt);
 441    sd->pan_func.get(sd->pan_obj, &px, &py);
 442    px = (sd->scrollto.x.start * (1.0 - tt)) +
 443      (sd->scrollto.x.end * tt);
 444    if (t >= sd->scrollto.x.t_end)
 445      {
 446         px = sd->scrollto.x.end;
 447         elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 448         sd->scrollto.x.animator = NULL;
 449         if ((!sd->scrollto.y.animator) && (!sd->down.bounce_y_animator))
 450           _smart_anim_stop(sd->smart_obj);
 451         return ECORE_CALLBACK_CANCEL;
 452      }
 453    elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 454    return ECORE_CALLBACK_RENEW;
 455 }
 456
 457 static void
 458 _smart_momentum_end(Smart_Data *sd)
 459 {
 460    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator)) return;
 461    if (sd->down.momentum_animator)
 462      {
 463         Evas_Coord px, py;
 464         elm_smart_scroller_child_pos_get(sd->smart_obj, &px, &py);
 465         _update_wanted_coordinates(sd, px, py);
 466
 467         ecore_animator_del(sd->down.momentum_animator);
 468         sd->down.momentum_animator = NULL;
 469         sd->down.bounce_x_hold = 0;
 470         sd->down.bounce_y_hold = 0;
 471         sd->down.ax = 0;
 472         sd->down.ay = 0;
 473         sd->down.pdx = 0;
 474         sd->down.pdy = 0;
 475      }
 476 }
 477
 478 static void
 479 _smart_scrollto_x(Smart_Data *sd, double t_in, Evas_Coord pos_x)
 480 {
 481    Evas_Coord px, py, x, y, w, h;
 482    double t;
 483
 484    if (sd->freeze) return;
 485    if (t_in <= 0.0)
 486      {
 487         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 488         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 489         x = pos_x;
 490         elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 491         return;
 492      }
 493    t = ecore_loop_time_get();
 494    sd->pan_func.get(sd->pan_obj, &px, &py);
 495    sd->scrollto.x.start = px;
 496    sd->scrollto.x.end = pos_x;
 497    sd->scrollto.x.t_start = t;
 498    sd->scrollto.x.t_end = t + t_in;
 499    if (!sd->scrollto.x.animator)
 500      {
 501         if (!sd->scrollto.y.animator)
 502           _smart_anim_start(sd->smart_obj);
 503         sd->scrollto.x.animator = ecore_animator_add(_smart_scrollto_x_animator, sd);
 504      }
 505    if (sd->down.bounce_x_animator)
 506      {
 507         ecore_animator_del(sd->down.bounce_x_animator);
 508         sd->down.bounce_x_animator = NULL;
 509         _smart_momentum_end(sd);
 510      }
 511    sd->bouncemex = 0;
 512 }
 513
 514 static Eina_Bool
 515 _smart_scrollto_y_animator(void *data)
 516 {
 517    Smart_Data *sd = data;
 518    Evas_Coord px, py;
 519    double t, tt;
 520
 521    t = ecore_loop_time_get();
 522    tt = (t - sd->scrollto.y.t_start) / (sd->scrollto.y.t_end - sd->scrollto.y.t_start);
 523    tt = 1.0 - tt;
 524    tt = 1.0 - (tt * tt);
 525    sd->pan_func.get(sd->pan_obj, &px, &py);
 526    py = (sd->scrollto.y.start * (1.0 - tt)) +
 527      (sd->scrollto.y.end * tt);
 528    if (t >= sd->scrollto.y.t_end)
 529      {
 530         py = sd->scrollto.y.end;
 531         elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 532         sd->scrollto.y.animator = NULL;
 533         if ((!sd->scrollto.x.animator) && (!sd->down.bounce_x_animator))
 534           _smart_anim_stop(sd->smart_obj);
 535         return ECORE_CALLBACK_CANCEL;
 536      }
 537    elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 538
 539    return ECORE_CALLBACK_RENEW;
 540 }
 541
 542 static void
 543 _smart_scrollto_y(Smart_Data *sd, double t_in, Evas_Coord pos_y)
 544 {
 545    Evas_Coord px, py, x, y, w, h;
 546    double t;
 547
 548    if (sd->freeze) return;
 549    if (t_in <= 0.0)
 550      {
 551         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 552         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 553         y = pos_y;
 554         elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 555         return;
 556      }
 557    t = ecore_loop_time_get();
 558    sd->pan_func.get(sd->pan_obj, &px, &py);
 559    sd->scrollto.y.start = py;
 560    sd->scrollto.y.end = pos_y;
 561    sd->scrollto.y.t_start = t;
 562    sd->scrollto.y.t_end = t + t_in;
 563    if (!sd->scrollto.y.animator)
 564      {
 565         if (!sd->scrollto.x.animator)
 566           _smart_anim_start(sd->smart_obj);
 567         sd->scrollto.y.animator = ecore_animator_add(_smart_scrollto_y_animator, sd);
 568      }
 569    if (sd->down.bounce_y_animator)
 570      {
 571         ecore_animator_del(sd->down.bounce_y_animator);
 572         sd->down.bounce_y_animator = NULL;
 573         _smart_momentum_end(sd);
 574      }
 575    sd->bouncemey = 0;
 576 }
 577
 578 static Eina_Bool
 579 _smart_do_page(Smart_Data *sd)
 580 {
 581    if ((sd->pagerel_h == 0.0) && (!sd->pagesize_h) &&
 582        (sd->pagerel_v == 0.0) && (!sd->pagesize_v))
 583      return EINA_FALSE;
 584    return EINA_TRUE;
 585 }
 586
 587 static Evas_Coord
 588 _smart_page_x_get(Smart_Data *sd, int offset)
 589 {
 590    Evas_Coord x, y, w, h, cw, ch, minx = 0;
 591
 592    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 593    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 594    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 595    sd->pan_func.min_get(sd->pan_obj, &minx, NULL);
 596
 597    x += offset;
 598
 599    if (sd->pagerel_h > 0.0)
 600      {
 601         x = x + (w * sd->pagerel_h * 0.5);
 602         x = x / (w * sd->pagerel_h);
 603         x = x * (w * sd->pagerel_h);
 604      }
 605    else if (sd->pagesize_h > 0)
 606      {
 607         x = x + (sd->pagesize_h * 0.5);
 608         x = x / (sd->pagesize_h);
 609         x = x * (sd->pagesize_h);
 610      }
 611    if ((x + w) > cw) x = cw - w;
 612    if (x < minx) x = minx;
 613    return x;
 614 }
 615
 616 static Evas_Coord
 617 _smart_page_y_get(Smart_Data *sd, int offset)
 618 {
 619    Evas_Coord x, y, w, h, cw, ch, miny = 0;
 620
 621    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 622    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 623    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 624    sd->pan_func.min_get(sd->pan_obj, NULL, &miny);
 625
 626    y += offset;
 627
 628    if (sd->pagerel_v > 0.0)
 629      {
 630         y = y + (h * sd->pagerel_v * 0.5);
 631         y = y / (h * sd->pagerel_v);
 632         y = y * (h * sd->pagerel_v);
 633      }
 634    else if (sd->pagesize_v > 0)
 635      {
 636         y = y + (sd->pagesize_v * 0.5);
 637         y = y / (sd->pagesize_v);
 638         y = y * (sd->pagesize_v);
 639      }
 640    if ((y + h) > ch) y = ch - h;
 641    if (y < miny) y = miny;
 642    return y;
 643 }
 644
 645 static void
 646 _smart_page_adjust(Smart_Data *sd)
 647 {
 648    Evas_Coord x, y, w, h;
 649
 650    if (!_smart_do_page(sd)) return;
 651
 652    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 653
 654    x = _smart_page_x_get(sd, 0);
 655    y = _smart_page_y_get(sd, 0);
 656
 657    elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 658 }
 659
 660 static Eina_Bool
 661 _smart_bounce_x_animator(void *data)
 662 {
 663    Smart_Data *sd;
 664    Evas_Coord x, y, dx;
 665    double t, p, dt;
 666
 667    sd = data;
 668    t = ecore_loop_time_get();
 669    dt = t - sd->down.anim_start2;
 670    if (dt >= 0.0)
 671      {
 672         dt = dt / _elm_config->thumbscroll_bounce_friction;
 673         if (dt > 1.0) dt = 1.0;
 674         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 675         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 676         dx = sd->down.b2x - sd->down.bx;
 677         dx = (dx * p);
 678         x = sd->down.bx + dx;
 679         if (!sd->down.cancelled)
 680           elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 681         if (dt >= 1.0)
 682           {
 683              if (sd->down.momentum_animator)
 684                sd->down.bounce_x_hold = 1;
 685              else if ((!sd->down.bounce_y_animator) &&
 686                       (!sd->scrollto.y.animator))
 687                _smart_anim_stop(sd->smart_obj);
 688              sd->down.bounce_x_animator = NULL;
 689              sd->down.pdx = 0;
 690              sd->bouncemex = 0;
 691              _smart_momentum_end(sd);
 692              return ECORE_CALLBACK_CANCEL;
 693           }
 694      }
 695    return ECORE_CALLBACK_RENEW;
 696 }
 697
 698 static Eina_Bool
 699 _smart_bounce_y_animator(void *data)
 700 {
 701    Smart_Data *sd;
 702    Evas_Coord x, y, dy;
 703    double t, p, dt;
 704
 705    sd = data;
 706    t = ecore_loop_time_get();
 707    dt = t - sd->down.anim_start3;
 708    if (dt >= 0.0)
 709      {
 710         dt = dt / _elm_config->thumbscroll_bounce_friction;
 711         if (dt > 1.0) dt = 1.0;
 712         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 713         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 714         dy = sd->down.b2y - sd->down.by;
 715         dy = (dy * p);
 716         y = sd->down.by + dy;
 717         if (!sd->down.cancelled)
 718           elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 719         if (dt >= 1.0)
 720           {
 721              if (sd->down.momentum_animator)
 722                sd->down.bounce_y_hold = 1;
 723              else if ((!sd->down.bounce_x_animator) &&
 724                  (!sd->scrollto.y.animator))
 725                _smart_anim_stop(sd->smart_obj);
 726              sd->down.bounce_y_animator = NULL;
 727              sd->down.pdy = 0;
 728              sd->bouncemey = 0;
 729              _smart_momentum_end(sd);
 730              return ECORE_CALLBACK_CANCEL;
 731           }
 732      }
 733    return ECORE_CALLBACK_RENEW;
 734 }
 735
 736 #define LEFT 0
 737 #define RIGHT 1
 738 #define UP 2
 739 #define DOWN 3
 740 static Eina_Bool
 741 can_scroll(Smart_Data *sd, int dir)
 742 {
 743    Evas_Coord mx = 0, my = 0, px = 0, py = 0, minx = 0, miny = 0;
 744
 745    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 746    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 747    sd->pan_func.get(sd->pan_obj, &px, &py);
 748    switch (dir)
 749      {
 750      case LEFT:
 751         if (px > minx) return EINA_TRUE;
 752         break;
 753      case RIGHT:
 754         if ((px - minx) < mx) return EINA_TRUE;
 755         break;
 756      case UP:
 757         if (py > miny) return EINA_TRUE;
 758         break;
 759      case DOWN:
 760         if ((py - miny) < my) return EINA_TRUE;
 761         break;
 762      default:
 763         break;
 764      }
 765    return EINA_FALSE;
 766 }
 767
 768 static Eina_Bool
 769 _smart_momentum_animator(void *data)
 770 {
 771    Smart_Data *sd;
 772    double t, dt, p;
 773    Evas_Coord x, y, dx, dy, px, py, maxx, maxy, minx, miny;
 774    Eina_Bool no_bounce_x_end = EINA_FALSE, no_bounce_y_end = EINA_FALSE;
 775
 776    sd = data;
 777    t = ecore_loop_time_get();
 778    dt = t - sd->down.anim_start;
 779    if (dt >= 0.0)
 780      {
 781         /*
 782         if (sd->down.hold_parent)
 783           {
 784              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
 785                {
 786                   sd->down.dir_x = 0;
 787                }
 788              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
 789                {
 790                   sd->down.dir_y = 0;
 791                   }
 792                   }
 793                   if ((!sd->down.dir_x) && (!sd->down.dir_y))
 794                   {
 795                   sd->down.cancelled = 1;
 796                   }
 797          */
 798         dt = dt / (_elm_config->thumbscroll_friction + sd->down.extra_time);
 799         if (dt > 1.0) dt = 1.0;
 800         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 801         dx = (sd->down.dx * (_elm_config->thumbscroll_friction + sd->down.extra_time) * p);
 802         dy = (sd->down.dy * (_elm_config->thumbscroll_friction + sd->down.extra_time) * p);
 803         sd->down.ax = dx;
 804         sd->down.ay = dy;
 805         x = sd->down.sx - dx;
 806         y = sd->down.sy - dy;
 807         elm_smart_scroller_child_pos_get(sd->smart_obj, &px, &py);
 808         if ((sd->down.bounce_x_animator) ||
 809             (sd->down.bounce_x_hold))
 810           {
 811              sd->down.bx = sd->down.bx0 - dx + sd->down.b0x;
 812              x = px;
 813           }
 814         if ((sd->down.bounce_y_animator) ||
 815             (sd->down.bounce_y_hold))
 816           {
 817              sd->down.by = sd->down.by0 - dy + sd->down.b0y;
 818              y = py;
 819           }
 820         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 821         _update_wanted_coordinates(sd, x, y);
 822         sd->pan_func.max_get(sd->pan_obj, &maxx, &maxy);
 823         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 824         if (!sd->bounce_horiz)
 825           {
 826              if (x <= minx) no_bounce_x_end = EINA_TRUE;
 827              if ((x - minx) >= maxx) no_bounce_x_end = EINA_TRUE;
 828           }
 829         if (!sd->bounce_vert)
 830           {
 831              if (y <= miny) no_bounce_y_end = EINA_TRUE;
 832              if ((y - miny) >= maxy) no_bounce_y_end = EINA_TRUE;
 833           }
 834         if ((dt >= 1.0) ||
 835             ((sd->down.bounce_x_hold) && (sd->down.bounce_y_hold)) ||
 836             (no_bounce_x_end && no_bounce_y_end))
 837           {
 838              _smart_anim_stop(sd->smart_obj);
 839
 840              sd->down.momentum_animator = NULL;
 841              sd->down.bounce_x_hold = 0;
 842              sd->down.bounce_y_hold = 0;
 843              sd->down.ax = 0;
 844              sd->down.ay = 0;
 845              sd->down.pdx = 0;
 846              sd->down.pdy = 0;
 847              return ECORE_CALLBACK_CANCEL;
 848           }
 849      }
 850    return ECORE_CALLBACK_RENEW;
 851 }
 852
 853 static void
 854 bounce_eval(Smart_Data *sd)
 855 {
 856    Evas_Coord mx, my, px, py, bx, by, b2x, b2y, minx = 0, miny = 0;
 857
 858    if (sd->freeze) return;
 859    if ((!sd->bouncemex) && (!sd->bouncemey)) return;
 860    if (sd->down.now) return; // down bounce while still held down
 861    if (sd->down.onhold_animator)
 862      {
 863         ecore_animator_del(sd->down.onhold_animator);
 864         sd->down.onhold_animator = NULL;
 865      }
 866    if (sd->down.hold_animator)
 867      {
 868         ecore_animator_del(sd->down.hold_animator);
 869         sd->down.hold_animator = NULL;
 870      }
 871    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 872    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 873    sd->pan_func.get(sd->pan_obj, &px, &py);
 874    bx = px;
 875    by = py;
 876    if (px < minx) px = minx;
 877    if ((px - minx) > mx) px = mx + minx;
 878    if (py < miny) py = miny;
 879    if ((py - miny) > my) py = my + miny;
 880    b2x = px;
 881    b2y = py;
 882    if ((!sd->widget) ||
 883        (!elm_widget_drag_child_locked_x_get(sd->widget)))
 884      {
 885         if ((!sd->down.bounce_x_animator) && (!sd->bounce_animator_disabled))
 886           {
 887              if (sd->bouncemex)
 888                {
 889                   if (sd->scrollto.x.animator)
 890                     {
 891                        ecore_animator_del(sd->scrollto.x.animator);
 892                        sd->scrollto.x.animator = NULL;
 893                     }
 894                   sd->down.bounce_x_animator = ecore_animator_add(_smart_bounce_x_animator, sd);
 895                   sd->down.anim_start2 = ecore_loop_time_get();
 896                   sd->down.bx = bx;
 897                   sd->down.bx0 = bx;
 898                   sd->down.b2x = b2x;
 899                   if (sd->down.momentum_animator) sd->down.b0x = sd->down.ax;
 900                   else sd->down.b0x = 0;
 901                }
 902           }
 903      }
 904    if ((!sd->widget) ||
 905        (!elm_widget_drag_child_locked_y_get(sd->widget)))
 906      {
 907         if ((!sd->down.bounce_y_animator) && (!sd->bounce_animator_disabled))
 908           {
 909              if (sd->bouncemey)
 910                {
 911                   if (sd->scrollto.y.animator)
 912                     {
 913                        ecore_animator_del(sd->scrollto.y.animator);
 914                        sd->scrollto.y.animator = NULL;
 915                     }
 916                   sd->down.bounce_y_animator = ecore_animator_add(_smart_bounce_y_animator, sd);
 917                   sd->down.anim_start3 = ecore_loop_time_get();
 918                   sd->down.by = by;
 919                   sd->down.by0 = by;
 920                   sd->down.b2y = b2y;
 921                   if (sd->down.momentum_animator) sd->down.b0y = sd->down.ay;
 922                   else sd->down.b0y = 0;
 923                }
 924           }
 925      }
 926 }
 927
 928 void
 929 elm_smart_scroller_child_pos_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
 930 {
 931    Evas_Coord mx = 0, my = 0, px = 0, py = 0, minx = 0, miny = 0;
 932    double vx, vy;
 933
 934    API_ENTRY return;
 935    // FIXME: allow for bounce outside of range
 936    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 937    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 938    if (mx > 0) vx = (double)(x - minx) / (double)mx;
 939    else vx = 0.0;
 940    if (vx < 0.0) vx = 0.0;
 941    else if (vx > 1.0) vx = 1.0;
 942    if (my > 0) vy = (double)(y - miny) / (double)my;
 943    else vy = 0.0;
 944    if (vy < 0.0) vy = 0.0;
 945    else if (vy > 1.0) vy = 1.0;
 946    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, vy);
 947    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", vx, 0.0);
 948    sd->pan_func.get(sd->pan_obj, &px, &py);
 949    if (!_elm_config->thumbscroll_bounce_enable)
 950      {
 951         if (x < minx) x = minx;
 952         if ((x - minx) > mx) x = mx + minx;
 953         if (y < miny) y = miny;
 954         if ((y - miny) > my) y = my + miny;
 955      }
 956
 957    if (!sd->bounce_horiz)
 958      {
 959         if (x < minx) x = minx;
 960         if ((x - minx) > mx) x = mx + minx;
 961      }
 962    if (!sd->bounce_vert)
 963      {
 964         if (y < miny) y = miny;
 965         if (y - miny > my) y = my + miny;
 966      }
 967
 968    sd->pan_func.set(sd->pan_obj, x, y);
 969    if ((px != x) || (py != y))
 970      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
 971    if (!sd->down.bounce_x_animator)
 972      {
 973         if ((x < minx) || (x > (mx + minx)))
 974           {
 975              sd->bouncemex = 1;
 976              bounce_eval(sd);
 977           }
 978      }
 979    if (!sd->down.bounce_y_animator)
 980      {
 981         if ((y < miny) || (y > my + miny))
 982           {
 983              sd->bouncemey = 1;
 984              bounce_eval(sd);
 985           }
 986      }
 987    if ((x != px) || (y != py))
 988      {
 989         evas_object_smart_callback_call(obj, "scroll", NULL);
 990      }
 991    if ((x != px)/* && (!sd->bouncemex)*/)
 992      {
 993         if (x == minx)
 994           evas_object_smart_callback_call(obj, "edge,left", NULL);
 995         if (x == (mx + minx))
 996           evas_object_smart_callback_call(obj, "edge,right", NULL);
 997      }
 998    if ((y != py)/* && (!sd->bouncemey)*/)
 999      {
1000         if (y == miny)
1001           evas_object_smart_callback_call(obj, "edge,top", NULL);
1002         if (y == my + miny)
1003           evas_object_smart_callback_call(obj, "edge,bottom", NULL);
1004      }
1005 }
1006
1007 void
1008 elm_smart_scroller_child_pos_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1009 {
1010    API_ENTRY return;
1011    sd->pan_func.get(sd->pan_obj, x, y);
1012 }
1013
1014 /* returns TRUE when we need to move the scroller, FALSE otherwise.
1015  * Updates w and h either way, so save them if you need them. */
1016 static Eina_Bool
1017 _elm_smart_scroller_child_region_show_internal(Evas_Object *obj, Evas_Coord *_x, Evas_Coord *_y, Evas_Coord w, Evas_Coord h)
1018 {
1019    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;
1020
1021    API_ENTRY return EINA_FALSE;
1022    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
1023    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1024    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
1025    sd->pan_func.get(sd->pan_obj, &px, &py);
1026    evas_object_geometry_get(sd->pan_obj, NULL, NULL, &pw, &ph);
1027
1028    nx = px;
1029    if ((x < px) && ((x + w) < (px + (cw - mx)))) nx = x;
1030    else if ((x > px) && ((x + w) > (px + (cw - mx)))) nx = x + w - (cw - mx);
1031    ny = py;
1032    if ((y < py) && ((y + h) < (py + (ch - my)))) ny = y;
1033    else if ((y > py) && ((y + h) > (py + (ch - my)))) ny = y + h - (ch - my);
1034
1035    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1036        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1037      {
1038         _smart_anim_stop(sd->smart_obj);
1039      }
1040    if (sd->scrollto.x.animator)
1041      {
1042         ecore_animator_del(sd->scrollto.x.animator);
1043         sd->scrollto.x.animator = NULL;
1044      }
1045    if (sd->scrollto.y.animator)
1046      {
1047         ecore_animator_del(sd->scrollto.y.animator);
1048         sd->scrollto.y.animator = NULL;
1049      }
1050    if (sd->down.bounce_x_animator)
1051      {
1052         ecore_animator_del(sd->down.bounce_x_animator);
1053         sd->down.bounce_x_animator = NULL;
1054         sd->bouncemex = 0;
1055      }
1056    if (sd->down.bounce_y_animator)
1057      {
1058         ecore_animator_del(sd->down.bounce_y_animator);
1059         sd->down.bounce_y_animator = NULL;
1060         sd->bouncemey = 0;
1061      }
1062    if (sd->down.hold_animator)
1063      {
1064         ecore_animator_del(sd->down.hold_animator);
1065         sd->down.hold_animator = NULL;
1066         _smart_drag_stop(sd->smart_obj);
1067      }
1068    if (sd->down.momentum_animator)
1069      {
1070         ecore_animator_del(sd->down.momentum_animator);
1071         sd->down.momentum_animator = NULL;
1072         sd->down.bounce_x_hold = 0;
1073         sd->down.bounce_y_hold = 0;
1074         sd->down.ax = 0;
1075         sd->down.ay = 0;
1076         sd->down.pdx = 0;
1077         sd->down.pdy = 0;
1078      }
1079
1080    x = nx;
1081    if ((x + pw) > cw) x = cw - pw;
1082    if (x < minx) x = minx;
1083    y = ny;
1084    if ((y + ph) > ch) y = ch - ph;
1085    if (y < miny) y = miny;
1086
1087    if ((x == px) && (y == py)) return EINA_FALSE;
1088    *_x = x;
1089    *_y = y;
1090    return EINA_TRUE;
1091 }
1092
1093 /* Set should be used for calculated positions, for example, when we move
1094  * because of an animation or because this is the correct position after
1095  * constraints. */
1096 void
1097 elm_smart_scroller_child_region_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1098 {
1099    if (_elm_smart_scroller_child_region_show_internal(obj, &x, &y, w, h))
1100       elm_smart_scroller_child_pos_set(obj, x, y);
1101 }
1102
1103 /* Set should be used for setting the wanted position, for example a user scroll
1104  * or moving the cursor in an entry. */
1105 void
1106 elm_smart_scroller_child_region_show(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1107 {
1108    API_ENTRY return;
1109    sd->wx = x;
1110    sd->wy = y;
1111    sd->ww = w;
1112    sd->wh = h;
1113    if (_elm_smart_scroller_child_region_show_internal(obj, &x, &y, w, h))
1114       elm_smart_scroller_child_pos_set(obj, x, y);
1115 }
1116
1117 void
1118 elm_smart_scroller_child_viewport_size_get(Evas_Object *obj, Evas_Coord *w, Evas_Coord *h)
1119 {
1120    API_ENTRY return;
1121    if (!sd->pan_obj) return;
1122    edje_object_calc_force(sd->edje_obj);
1123    evas_object_geometry_get(sd->pan_obj, NULL, NULL, w, h);
1124 }
1125
1126 void
1127 elm_smart_scroller_step_size_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
1128 {
1129    API_ENTRY return;
1130    if (x < 1) x = 1;
1131    if (y < 1) y = 1;
1132    sd->step.x = x;
1133    sd->step.y = y;
1134    _smart_scrollbar_size_adjust(sd);
1135 }
1136
1137 void
1138 elm_smart_scroller_step_size_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1139 {
1140    API_ENTRY return;
1141    if (x) *x = sd->step.x;
1142    if (y) *y = sd->step.y;
1143 }
1144
1145 void
1146 elm_smart_scroller_page_size_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
1147 {
1148    API_ENTRY return;
1149    sd->page.x = x;
1150    sd->page.y = y;
1151    _smart_scrollbar_size_adjust(sd);
1152 }
1153
1154 void
1155 elm_smart_scroller_page_size_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1156 {
1157    API_ENTRY return;
1158    if (x) *x = sd->page.x;
1159    if (y) *y = sd->page.y;
1160 }
1161
1162 void
1163 elm_smart_scroller_policy_set(Evas_Object *obj, Elm_Smart_Scroller_Policy hbar, Elm_Smart_Scroller_Policy vbar)
1164 {
1165    API_ENTRY return;
1166    if ((sd->hbar_flags == hbar) && (sd->vbar_flags == vbar)) return;
1167    sd->hbar_flags = hbar;
1168    sd->vbar_flags = vbar;
1169    if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
1170      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,hbar", "elm");
1171    else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
1172      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
1173    else
1174      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,hbar", "elm");
1175    if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
1176      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,vbar", "elm");
1177    else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
1178      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
1179    else
1180      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,vbar", "elm");
1181    _smart_scrollbar_size_adjust(sd);
1182 }
1183
1184 void
1185 elm_smart_scroller_policy_get(Evas_Object *obj, Elm_Smart_Scroller_Policy *hbar, Elm_Smart_Scroller_Policy *vbar)
1186 {
1187    API_ENTRY return;
1188    if (hbar) *hbar = sd->hbar_flags;
1189    if (vbar) *vbar = sd->vbar_flags;
1190 }
1191
1192 Evas_Object *
1193 elm_smart_scroller_edje_object_get(Evas_Object *obj)
1194 {
1195    API_ENTRY return NULL;
1196    return sd->edje_obj;
1197 }
1198
1199 void
1200 elm_smart_scroller_single_dir_set(Evas_Object *obj, Eina_Bool single_dir)
1201 {
1202    API_ENTRY return;
1203    sd->one_dir_at_a_time = single_dir;
1204 }
1205
1206 Eina_Bool
1207 elm_smart_scroller_single_dir_get(Evas_Object *obj)
1208 {
1209    API_ENTRY return EINA_FALSE;
1210    return sd->one_dir_at_a_time;
1211 }
1212
1213 void
1214 elm_smart_scroller_object_theme_set(Evas_Object *parent, Evas_Object *obj, const char *clas, const char *group, const char *style)
1215 {
1216    API_ENTRY return;
1217    Evas_Coord mw, mh;
1218    //Does this API require parent object absolutely? if then remove this exception.
1219    double parent_scale = parent ? elm_widget_scale_get(parent) : 1;
1220    _elm_theme_object_set(parent, sd->edje_obj, clas, group, style);
1221    edje_object_scale_set(sd->edje_obj, parent_scale * _elm_config->scale);
1222    if (sd->pan_obj)
1223      edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
1224    mw = mh = -1;
1225    elm_coords_finger_size_adjust(1, &mw, 1, &mh);
1226    if (edje_object_part_exists(sd->edje_obj, "elm.scrollbar.base"))
1227      {
1228         Evas_Object *base;
1229         base = edje_object_part_swallow_get(sd->edje_obj, "elm.scrollbar.base");
1230         if (!base)
1231           {
1232              base = evas_object_rectangle_add(evas_object_evas_get(sd->edje_obj));
1233              evas_object_color_set(base, 0, 0, 0, 0);
1234              edje_object_part_swallow(sd->edje_obj, "elm.scrollbar.base", base);
1235           }
1236         if (!_elm_config->thumbscroll_enable)
1237            evas_object_size_hint_min_set(base, mw, mh);
1238      }
1239    sd->vbar_visible = !sd->vbar_visible;
1240    sd->hbar_visible = !sd->hbar_visible;
1241    _smart_scrollbar_bar_visibility_adjust(sd);
1242 }
1243
1244 void
1245 elm_smart_scroller_hold_set(Evas_Object *obj, Eina_Bool hold)
1246 {
1247    API_ENTRY return;
1248    sd->hold = hold;
1249 }
1250
1251 void
1252 elm_smart_scroller_freeze_set(Evas_Object *obj, Eina_Bool freeze)
1253 {
1254    API_ENTRY return;
1255    sd->freeze = freeze;
1256    if (sd->freeze)
1257      {
1258         if (sd->down.onhold_animator)
1259           {
1260              ecore_animator_del(sd->down.onhold_animator);
1261              sd->down.onhold_animator = NULL;
1262           }
1263      }
1264    else
1265      bounce_eval(sd);
1266 }
1267
1268 void
1269 elm_smart_scroller_bounce_allow_set(Evas_Object *obj, Eina_Bool horiz, Eina_Bool vert)
1270 {
1271    API_ENTRY return;
1272    sd->bounce_horiz = horiz;
1273    sd->bounce_vert = vert;
1274 }
1275
1276 void
1277 elm_smart_scroller_bounce_allow_get(const Evas_Object *obj, Eina_Bool *horiz, Eina_Bool *vert)
1278 {
1279    API_ENTRY return;
1280    *horiz = sd->bounce_horiz;
1281    *vert = sd->bounce_vert;
1282 }
1283
1284 void
1285 elm_smart_scroller_paging_set(Evas_Object *obj, double pagerel_h, double pagerel_v, Evas_Coord pagesize_h, Evas_Coord pagesize_v)
1286 {
1287    API_ENTRY return;
1288    sd->pagerel_h = pagerel_h;
1289    sd->pagerel_v = pagerel_v;
1290    sd->pagesize_h = pagesize_h;
1291    sd->pagesize_v = pagesize_v;
1292    _smart_page_adjust(sd);
1293 }
1294
1295 void
1296 elm_smart_scroller_paging_get(Evas_Object *obj, double *pagerel_h, double *pagerel_v, Evas_Coord *pagesize_h, Evas_Coord *pagesize_v)
1297 {
1298    API_ENTRY return;
1299    if(pagerel_h) *pagerel_h = sd->pagerel_h;
1300    if(pagerel_v) *pagerel_v = sd->pagerel_v;
1301    if(pagesize_h) *pagesize_h = sd->pagesize_h;
1302    if(pagesize_v) *pagesize_v = sd->pagesize_v;
1303 }
1304
1305 void
1306 elm_smart_scroller_region_bring_in(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1307 {
1308    API_ENTRY return;
1309    if (_elm_smart_scroller_child_region_show_internal(obj, &x, &y, w, h))
1310      {
1311         _smart_scrollto_x(sd, _elm_config->bring_in_scroll_friction, x);
1312         _smart_scrollto_y(sd, _elm_config->bring_in_scroll_friction, y);
1313      }
1314 }
1315
1316 void
1317 elm_smart_scroller_widget_set(Evas_Object *obj, Evas_Object *wid)
1318 {
1319    API_ENTRY return;
1320    sd->widget = wid;
1321 }
1322
1323 static void
1324 _elm_smart_scroller_wanted_region_set(Evas_Object *obj)
1325 {
1326    INTERNAL_ENTRY;
1327    Evas_Coord ww, wh, wx = sd->wx;
1328
1329    if (sd->down.now || sd->down.momentum_animator ||
1330        sd->down.bounce_x_animator || sd->down.bounce_y_animator ||
1331        sd->down.hold_animator || sd->down.onhold_animator) return;
1332
1333    /* Flip to RTL cords only if init in RTL mode */
1334    if(sd->is_mirrored)
1335      wx = _elm_smart_scroller_x_mirrored_get(obj, sd->wx);
1336
1337    if (sd->ww == -1)
1338      {
1339         elm_smart_scroller_child_viewport_size_get(obj, &ww, &wh);
1340      }
1341    else
1342      {
1343         ww = sd->ww;
1344         wh = sd->wh;
1345      }
1346
1347    elm_smart_scroller_child_region_set(obj, wx, sd->wy, ww, wh);
1348 }
1349
1350 /* local subsystem functions */
1351 static void
1352 _smart_edje_drag_v_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1353 {
1354    Smart_Data *sd;
1355
1356    sd = data;
1357    _smart_scrollbar_read(sd);
1358    _smart_drag_start(sd->smart_obj);
1359    sd->freeze = EINA_TRUE;
1360 }
1361
1362 static void
1363 _smart_edje_drag_v_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1364 {
1365    Smart_Data *sd;
1366
1367    sd = data;
1368    _smart_scrollbar_read(sd);
1369    _smart_drag_stop(sd->smart_obj);
1370    sd->freeze = EINA_FALSE;
1371 }
1372
1373 static void
1374 _smart_edje_drag_v(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1375 {
1376    Smart_Data *sd;
1377
1378    sd = data;
1379    _smart_scrollbar_read(sd);
1380 }
1381
1382 static void
1383 _smart_edje_drag_h_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1384 {
1385    Smart_Data *sd;
1386
1387    sd = data;
1388    _smart_scrollbar_read(sd);
1389    _smart_drag_start(sd->smart_obj);
1390    sd->freeze = EINA_TRUE;
1391 }
1392
1393 static void
1394 _smart_edje_drag_h_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1395 {
1396    Smart_Data *sd;
1397
1398    sd = data;
1399    _smart_scrollbar_read(sd);
1400    _smart_drag_stop(sd->smart_obj);
1401    sd->freeze = EINA_FALSE;
1402 }
1403
1404 static void
1405 _smart_edje_drag_h(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1406 {
1407    Smart_Data *sd;
1408
1409    sd = data;
1410    _smart_scrollbar_read(sd);
1411 }
1412
1413 static void
1414 _smart_child_del_hook(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1415 {
1416    Smart_Data *sd;
1417
1418    sd = data;
1419    sd->child_obj = NULL;
1420    _smart_scrollbar_size_adjust(sd);
1421    _smart_scrollbar_reset(sd);
1422 }
1423
1424 static void
1425 _smart_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1426 {
1427    Evas_Coord w, h;
1428    Smart_Data *sd;
1429
1430    sd = data;
1431    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
1432    if ((w != sd->child.w) || (h != sd->child.h))
1433      {
1434         sd->child.w = w;
1435         sd->child.h = h;
1436         _smart_scrollbar_size_adjust(sd);
1437         evas_object_size_hint_min_set(sd->smart_obj, sd->child.w, sd->child.h);
1438         _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1439      }
1440 }
1441
1442 static void
1443 _smart_pan_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1444 {
1445    Smart_Data *sd;
1446
1447    sd = data;
1448    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1449        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1450      {
1451         _smart_anim_stop(sd->smart_obj);
1452      }
1453    if (sd->scrollto.x.animator)
1454      {
1455         ecore_animator_del(sd->scrollto.x.animator);
1456         sd->scrollto.x.animator = NULL;
1457      }
1458    if (sd->scrollto.y.animator)
1459      {
1460         ecore_animator_del(sd->scrollto.y.animator);
1461         sd->scrollto.y.animator = NULL;
1462      }
1463    if (sd->down.bounce_x_animator)
1464      {
1465         ecore_animator_del(sd->down.bounce_x_animator);
1466         sd->down.bounce_x_animator = NULL;
1467         sd->bouncemex = 0;
1468      }
1469    if (sd->down.bounce_y_animator)
1470      {
1471         ecore_animator_del(sd->down.bounce_y_animator);
1472         sd->down.bounce_y_animator = NULL;
1473         sd->bouncemey = 0;
1474      }
1475    _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1476 }
1477
1478 static void
1479 _smart_event_wheel(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1480 {
1481    Evas_Event_Mouse_Wheel *ev;
1482    Smart_Data *sd;
1483    Evas_Coord x = 0, y = 0;
1484
1485    sd = data;
1486    ev = event_info;
1487    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1488    if ((evas_key_modifier_is_set(ev->modifiers, "Control")) ||
1489        (evas_key_modifier_is_set(ev->modifiers, "Alt")) ||
1490        (evas_key_modifier_is_set(ev->modifiers, "Shift")) ||
1491        (evas_key_modifier_is_set(ev->modifiers, "Meta")) ||
1492        (evas_key_modifier_is_set(ev->modifiers, "Hyper")) ||
1493        (evas_key_modifier_is_set(ev->modifiers, "Super")))
1494      return;
1495    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1496    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1497        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1498      {
1499         _smart_anim_stop(sd->smart_obj);
1500      }
1501    if (sd->scrollto.x.animator)
1502      {
1503         ecore_animator_del(sd->scrollto.x.animator);
1504         sd->scrollto.x.animator = NULL;
1505      }
1506    if (sd->scrollto.y.animator)
1507      {
1508         ecore_animator_del(sd->scrollto.y.animator);
1509         sd->scrollto.y.animator = NULL;
1510      }
1511    if (sd->down.bounce_x_animator)
1512      {
1513         ecore_animator_del(sd->down.bounce_x_animator);
1514         sd->down.bounce_x_animator = NULL;
1515         sd->bouncemex = 0;
1516      }
1517    if (sd->down.bounce_y_animator)
1518      {
1519         ecore_animator_del(sd->down.bounce_y_animator);
1520         sd->down.bounce_y_animator = NULL;
1521         sd->bouncemey = 0;
1522      }
1523    if (!ev->direction)
1524      y += ev->z * sd->step.y;
1525    else if (ev->direction == 1)
1526      x += ev->z * sd->step.x;
1527
1528    if ((!sd->hold) && (!sd->freeze))
1529      {
1530         _update_wanted_coordinates(sd, x, y);
1531         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1532      }
1533 }
1534
1535 static void
1536 _smart_event_mouse_down(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1537 {
1538    Evas_Event_Mouse_Down *ev;
1539    Smart_Data *sd;
1540    Evas_Coord x = 0, y = 0;
1541
1542    sd = data;
1543    ev = event_info;
1544    //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1545    if (_elm_config->thumbscroll_enable)
1546      {
1547         sd->down.hold = 0;
1548         if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1549             (sd->down.momentum_animator) || (sd->scrollto.x.animator) ||
1550             (sd->scrollto.y.animator))
1551           {
1552              ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL | EVAS_EVENT_FLAG_ON_HOLD;
1553              sd->down.scroll = 1;
1554              sd->down.hold = 1;
1555              _smart_anim_stop(sd->smart_obj);
1556           }
1557         if (sd->scrollto.x.animator)
1558           {
1559              ecore_animator_del(sd->scrollto.x.animator);
1560              sd->scrollto.x.animator = NULL;
1561           }
1562         if (sd->scrollto.y.animator)
1563           {
1564              ecore_animator_del(sd->scrollto.y.animator);
1565              sd->scrollto.y.animator = NULL;
1566           }
1567         if (sd->down.bounce_x_animator)
1568           {
1569              ecore_animator_del(sd->down.bounce_x_animator);
1570              sd->down.bounce_x_animator = NULL;
1571              sd->bouncemex = 0;
1572           }
1573         if (sd->down.bounce_y_animator)
1574           {
1575              ecore_animator_del(sd->down.bounce_y_animator);
1576              sd->down.bounce_y_animator = NULL;
1577              sd->bouncemey = 0;
1578           }
1579         if (sd->down.hold_animator)
1580           {
1581              ecore_animator_del(sd->down.hold_animator);
1582              sd->down.hold_animator = NULL;
1583              _smart_drag_stop(sd->smart_obj);
1584           }
1585         if (sd->down.momentum_animator)
1586           {
1587              ecore_animator_del(sd->down.momentum_animator);
1588              sd->down.momentum_animator = NULL;
1589              sd->down.bounce_x_hold = 0;
1590              sd->down.bounce_y_hold = 0;
1591              sd->down.ax = 0;
1592              sd->down.ay = 0;
1593           }
1594         if (ev->button == 1)
1595           {
1596              sd->down.hist.est_timestamp_diff =
1597                 ecore_loop_time_get() - ((double)ev->timestamp / 1000.0);
1598              sd->down.now = 1;
1599              sd->down.dragged = 0;
1600              sd->down.dir_x = 0;
1601              sd->down.dir_y = 0;
1602              sd->down.x = ev->canvas.x;
1603              sd->down.y = ev->canvas.y;
1604              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1605              sd->down.sx = x;
1606              sd->down.sy = y;
1607              sd->down.locked = 0;
1608              memset(&(sd->down.history[0]), 0, sizeof(sd->down.history[0]) * 60);
1609 #ifdef EVTIME
1610              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
1611              sd->down.history[0].localtimestamp = ecore_loop_time_get();
1612 #else
1613              sd->down.history[0].timestamp = ecore_loop_time_get();
1614 #endif
1615              sd->down.history[0].x = ev->canvas.x;
1616              sd->down.history[0].y = ev->canvas.y;
1617           }
1618         sd->down.dragged_began = 0;
1619         sd->down.hold_parent = 0;
1620         sd->down.cancelled = 0;
1621      }
1622 }
1623
1624 static void
1625 _down_coord_eval(Smart_Data *sd, Evas_Coord *x, Evas_Coord *y)
1626 {
1627    Evas_Coord minx, miny;
1628
1629    if (sd->down.dir_x) *x = sd->down.sx - (*x - sd->down.x);
1630    else *x = sd->down.sx;
1631    if (sd->down.dir_y) *y = sd->down.sy - (*y - sd->down.y);
1632    else *y = sd->down.sy;
1633
1634    if ((sd->down.dir_x) || (sd->down.dir_y))
1635      {
1636         if (!((sd->down.dir_x) && (sd->down.dir_y)))
1637           {
1638              if (sd->down.dir_x) *y = sd->down.locked_y;
1639              else *x = sd->down.locked_x;
1640           }
1641      }
1642
1643    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1644
1645    if (*x < minx)
1646       *x += (minx - *x) * _elm_config->thumbscroll_border_friction;
1647    else if (sd->child.w <= sd->w)
1648       *x += (sd->down.sx - *x) * _elm_config->thumbscroll_border_friction;
1649    else if ((sd->child.w - sd->w + minx) < *x)
1650       *x += (sd->child.w - sd->w + minx - *x) *
1651       _elm_config->thumbscroll_border_friction;
1652
1653    if (*y < miny)
1654       *y += (miny - *y) * _elm_config->thumbscroll_border_friction;
1655    else if (sd->child.h <= sd->h)
1656       *y += (sd->down.sy - *y) * _elm_config->thumbscroll_border_friction;
1657    else if ((sd->child.h - sd->h + miny) < *y)
1658       *y += (sd->child.h - sd->h + miny - *y) *
1659       _elm_config->thumbscroll_border_friction;
1660 }
1661
1662 static Eina_Bool
1663 _smart_hold_animator(void *data)
1664 {
1665    Smart_Data *sd = data;
1666    Evas_Coord ox = 0, oy = 0, fx, fy;
1667
1668    fx = sd->down.hold_x;
1669    fy = sd->down.hold_y;
1670    if (_elm_config->scroll_smooth_amount > 0.0)
1671      {
1672         int i, count = 0;
1673         Evas_Coord basex, basey, x, y;
1674         double dt, t, tdiff, tnow;
1675         struct {
1676            Evas_Coord x, y, dx, dy;
1677            double t, dt;
1678         } pos[60];
1679
1680         // FIXME: assume server and client have the same "timezone"
1681         // (0 timepoint) for now. this needs to be figured out in advance
1682         // though.
1683         tdiff = sd->down.hist.est_timestamp_diff;
1684         tnow = ecore_time_get() - tdiff;
1685         t = tnow;
1686         for (i = 0; i < 60; i++)
1687           {
1688              // oldest point is sd->down.history[i]
1689              // newset is sd->down.history[0]
1690              dt = t - sd->down.history[i].timestamp;
1691              if (dt > 0.1)
1692                {
1693                   i--;
1694                   break;
1695                }
1696              x = sd->down.history[i].x;
1697              y = sd->down.history[i].y;
1698              _down_coord_eval(sd, &x, &y);
1699              if (i == 0)
1700                {
1701                   basex = x;
1702                   basey = y;
1703                }
1704              pos[i].x = x - basex;
1705              pos[i].y = y - basey;
1706              pos[i].t =
1707                 sd->down.history[i].timestamp - sd->down.history[0].timestamp;
1708              count++;
1709           }
1710         count = i;
1711         if (count >= 2)
1712           {
1713              double dtsum = 0.0, tadd, maxdt;
1714              double dxsum = 0.0, dysum = 0.0, xsum = 0.0, ysum = 0.0;
1715
1716              for (i = 0; i < (count - 1); i++)
1717                {
1718                   pos[i].dx = pos[i].x - pos[i + 1].x;
1719                   pos[i].dy = pos[i].y - pos[i + 1].y;
1720                   pos[i].dt = pos[i].t - pos[i + 1].t;
1721                   dxsum += pos[i].dx;
1722                   dysum += pos[i].dy;
1723                   dtsum += pos[i].dt;
1724                   xsum += pos[i].x;
1725                   ysum += pos[i].y;
1726                }
1727              maxdt = pos[i].t;
1728              dxsum /= (double)i;
1729              dysum /= (double)i;
1730              dtsum /= (double)i;
1731              xsum /= (double)i;
1732              ysum /= (double)i;
1733              tadd = tnow - sd->down.history[0].timestamp + _elm_config->scroll_smooth_future_time;
1734              tadd = tadd - (maxdt / 2);
1735 #define WEIGHT(n, o, v) n = (o * (v - 1.0)) + (n * v)
1736              WEIGHT(tadd, sd->down.hist.tadd, _elm_config->scroll_smooth_history_weight);
1737              WEIGHT(dxsum, sd->down.hist.dxsum, _elm_config->scroll_smooth_history_weight);
1738              WEIGHT(dysum, sd->down.hist.dysum, _elm_config->scroll_smooth_history_weight);
1739              fx = basex + xsum + ((dxsum * tadd) / dtsum);
1740              fy = basey + ysum + ((dysum * tadd) / dtsum);
1741              sd->down.hist.tadd = tadd;
1742              sd->down.hist.dxsum = dxsum;
1743              sd->down.hist.dysum = dysum;
1744              fx = WEIGHT(fx, sd->down.hold_x, _elm_config->scroll_smooth_amount);
1745              fy = WEIGHT(fy, sd->down.hold_y, _elm_config->scroll_smooth_amount);
1746           }
1747      }
1748
1749    elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
1750    if (sd->down.dir_x)
1751      {
1752         if ((!sd->widget) ||
1753             (!elm_widget_drag_child_locked_x_get(sd->widget)))
1754           {
1755              ox = sd->down.hold_x;
1756              ox = fx;
1757           }
1758      }
1759    if (sd->down.dir_y)
1760      {
1761         if ((!sd->widget) ||
1762             (!elm_widget_drag_child_locked_y_get(sd->widget)))
1763           {
1764              oy = sd->down.hold_y;
1765              oy = fy;
1766           }
1767      }
1768
1769    elm_smart_scroller_child_pos_set(sd->smart_obj, ox, oy);
1770    return ECORE_CALLBACK_RENEW;
1771 }
1772
1773 static Eina_Bool
1774 _smart_event_post_up(void *data, Evas *e __UNUSED__)
1775 {
1776    Smart_Data *sd = data;
1777    if (sd->widget)
1778      {
1779         if (sd->down.dragged)
1780           {
1781              elm_widget_drag_lock_x_set(sd->widget, 0);
1782              elm_widget_drag_lock_y_set(sd->widget, 0);
1783           }
1784      }
1785    return EINA_TRUE;
1786 }
1787
1788 static void
1789 _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
1790 {
1791    Evas_Event_Mouse_Down *ev;
1792    Smart_Data *sd;
1793    Evas_Coord x = 0, y = 0, ox = 0, oy = 0;
1794
1795    sd = data;
1796    ev = event_info;
1797    sd->down.hold_parent = 0;
1798    //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1799    evas_post_event_callback_push(e, _smart_event_post_up, sd);
1800    // FIXME: respect elm_widget_scroll_hold_get of parent container
1801    if (_elm_config->thumbscroll_enable)
1802      {
1803         if (ev->button == 1)
1804           {
1805              if (sd->down.onhold_animator)
1806                {
1807                   ecore_animator_del(sd->down.onhold_animator);
1808                   sd->down.onhold_animator = NULL;
1809                }
1810              x = ev->canvas.x - sd->down.x;
1811              y = ev->canvas.y - sd->down.y;
1812              if (sd->down.dragged)
1813                {
1814                   _smart_drag_stop(sd->smart_obj);
1815                   if ((!sd->hold) && (!sd->freeze))
1816                     {
1817                        double t, at, dt;
1818                        int i;
1819                        Evas_Coord ax, ay, dx, dy, vel;
1820
1821 #ifdef EVTIME
1822                        t = ev->timestamp / 1000.0;
1823 #else
1824                        t = ecore_loop_time_get();
1825 #endif
1826                        ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1827                        ax = ev->canvas.x;
1828                        ay = ev->canvas.y;
1829                        at = 0.0;
1830 #ifdef SCROLLDBG
1831                        printf("------ %i %i\n", ev->canvas.x, ev->canvas.y);
1832 #endif
1833                        for (i = 0; i < 60; i++)
1834                          {
1835                             dt = t - sd->down.history[i].timestamp;
1836                             if (dt > 0.2) break;
1837 #ifdef SCROLLDBG
1838                             printf("H: %i %i @ %1.3f\n",
1839                                    sd->down.history[i].x,
1840                                    sd->down.history[i].y, dt);
1841 #endif
1842                             at += dt;
1843                             ax += sd->down.history[i].x;
1844                             ay += sd->down.history[i].y;
1845                          }
1846                        ax /= (i + 1);
1847                        ay /= (i + 1);
1848                        at /= (i + 1);
1849                        at *= 4.0; // magic number! just trial and error shows this makes it behave "nicer" and not run off at high speed all the time
1850                        dx = ev->canvas.x - ax;
1851                        dy = ev->canvas.y - ay;
1852                        if (at > 0)
1853                          {
1854                             vel = sqrt((dx * dx) + (dy * dy)) / at;
1855                             if ((_elm_config->thumbscroll_friction > 0.0) &&
1856                                 (vel > _elm_config->thumbscroll_momentum_threshold))
1857                               {
1858                                  sd->down.dx = ((double)dx / at);
1859                                  sd->down.dy = ((double)dy / at);
1860                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1861                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)))
1862                                    sd->down.dx += (double)sd->down.pdx * 1.5; // FIXME: * 1.5 - probably should be config
1863                                  if (((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1864                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1865                                    sd->down.dy += (double)sd->down.pdy * 1.5; // FIXME: * 1.5 - probably should be config
1866                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1867                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)) ||
1868                                      ((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1869                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1870                                    {
1871                                       double t = ecore_loop_time_get();
1872                                       double dt = t - sd->down.anim_start;
1873
1874                                       if (dt < 0.0) dt = 0.0;
1875                                       else if (dt > _elm_config->thumbscroll_friction)
1876                                         dt = _elm_config->thumbscroll_friction;
1877                                       sd->down.extra_time = _elm_config->thumbscroll_friction - dt;
1878                                    }
1879                                  else
1880                                    sd->down.extra_time = 0.0;
1881                                  sd->down.pdx = sd->down.dx;
1882                                  sd->down.pdy = sd->down.dy;
1883                                  ox = -sd->down.dx;
1884                                  oy = -sd->down.dy;
1885                                  if (!_smart_do_page(sd))
1886                                    {
1887                                       if ((!sd->down.momentum_animator) && (!sd->momentum_animator_disabled))
1888                                         {
1889                                            sd->down.momentum_animator = ecore_animator_add(_smart_momentum_animator, sd);
1890                                            ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1891                                            _smart_anim_start(sd->smart_obj);
1892                                         }
1893                                       sd->down.anim_start = ecore_loop_time_get();
1894                                       elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1895                                       sd->down.sx = x;
1896                                       sd->down.sy = y;
1897                                       sd->down.b0x = 0;
1898                                       sd->down.b0y = 0;
1899                                    }
1900                               }
1901                          }
1902                        if (sd->down.hold_animator)
1903                          {
1904                             ecore_animator_del(sd->down.hold_animator);
1905                             sd->down.hold_animator = NULL;
1906                          }
1907                     }
1908                   else
1909                     {
1910                        sd->down.pdx = 0;
1911                        sd->down.pdy = 0;
1912                     }
1913                   evas_event_feed_hold(e, 0, ev->timestamp, ev->data);
1914                   if (_smart_do_page(sd))
1915                     {
1916                        Evas_Coord pgx, pgy;
1917
1918                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1919                        if ((!sd->widget) ||
1920                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
1921                          {
1922                             pgx = _smart_page_x_get(sd, ox);
1923                             if (pgx != x)
1924                               {
1925                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1926                                  _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
1927                               }
1928                          }
1929                        if ((!sd->widget) ||
1930                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
1931                          {
1932                             pgy = _smart_page_y_get(sd, oy);
1933                             if (pgy != y)
1934                               {
1935                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1936                                  _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
1937                               }
1938                          }
1939                     }
1940                }
1941              else
1942                {
1943                   sd->down.pdx = 0;
1944                   sd->down.pdy = 0;
1945                   if (_smart_do_page(sd))
1946                     {
1947                        Evas_Coord pgx, pgy;
1948
1949                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1950                        if ((!sd->widget) ||
1951                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
1952                          {
1953                             pgx = _smart_page_x_get(sd, ox);
1954                             if (pgx != x) _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
1955                          }
1956                        if ((!sd->widget) ||
1957                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
1958                          {
1959                             pgy = _smart_page_y_get(sd, oy);
1960                             if (pgy != y) _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
1961                          }
1962                     }
1963                   if (sd->down.hold_animator)
1964                     {
1965                        ecore_animator_del(sd->down.hold_animator);
1966                        sd->down.hold_animator = NULL;
1967                     }
1968                }
1969              if (sd->down.scroll)
1970                {
1971                   ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1972                   sd->down.scroll = 0;
1973                }
1974              if (sd->down.hold)
1975                {
1976                   ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1977                   sd->down.hold = 0;
1978                }
1979              sd->down.dragged_began = 0;
1980              sd->down.dir_x = 0;
1981              sd->down.dir_y = 0;
1982              sd->down.want_dragged = 0;
1983              sd->down.dragged = 0;
1984              sd->down.now = 0;
1985              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1986              elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1987              _update_wanted_coordinates(sd, x, y);
1988
1989              if (!_smart_do_page(sd))
1990                bounce_eval(sd);
1991           }
1992      }
1993 }
1994
1995 static Eina_Bool
1996 _smart_onhold_animator(void *data)
1997 {
1998    Smart_Data *sd;
1999    double t, td;
2000    double vx, vy;
2001    Evas_Coord x, y, ox, oy;
2002
2003    sd = data;
2004    t = ecore_loop_time_get();
2005    if (sd->down.onhold_tlast > 0.0)
2006      {
2007         td = t - sd->down.onhold_tlast;
2008         vx = sd->down.onhold_vx * td * (double)_elm_config->thumbscroll_threshold * 2.0;
2009         vy = sd->down.onhold_vy * td * (double)_elm_config->thumbscroll_threshold * 2.0;
2010         elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
2011         x = ox;
2012         y = oy;
2013
2014         if (sd->down.dir_x)
2015           {
2016              if ((!sd->widget) ||
2017                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
2018                {
2019                   sd->down.onhold_vxe += vx;
2020                   x = ox + (int)sd->down.onhold_vxe;
2021                   sd->down.onhold_vxe -= (int)sd->down.onhold_vxe;
2022                }
2023           }
2024
2025         if (sd->down.dir_y)
2026           {
2027              if ((!sd->widget) ||
2028                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
2029                {
2030                   sd->down.onhold_vye += vy;
2031                   y = oy + (int)sd->down.onhold_vye;
2032                   sd->down.onhold_vye -= (int)sd->down.onhold_vye;
2033                }
2034           }
2035
2036         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2037      }
2038    sd->down.onhold_tlast = t;
2039    return ECORE_CALLBACK_RENEW;
2040 }
2041
2042 static Eina_Bool
2043 _smart_event_post_move(void *data, Evas *e __UNUSED__)
2044 {
2045    Smart_Data *sd = data;
2046
2047    if (sd->down.want_dragged)
2048      {
2049         int start = 0;
2050
2051         if (sd->down.hold_parent)
2052           {
2053              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
2054                {
2055                   sd->down.dir_x = 0;
2056                }
2057              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
2058                {
2059                   sd->down.dir_y = 0;
2060                }
2061           }
2062         if (sd->down.dir_x)
2063           {
2064              if ((!sd->widget) ||
2065                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
2066                {
2067                   sd->down.want_dragged = 0;
2068                   sd->down.dragged = 1;
2069                   if (sd->widget)
2070                     {
2071                        elm_widget_drag_lock_x_set(sd->widget, 1);
2072                     }
2073                   start = 1;
2074                }
2075              else
2076                sd->down.dir_x = 0;
2077           }
2078         if (sd->down.dir_y)
2079           {
2080              if ((!sd->widget) ||
2081                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
2082                {
2083                   sd->down.want_dragged = 0;
2084                   sd->down.dragged = 1;
2085                   if (sd->widget)
2086                     {
2087                        elm_widget_drag_lock_y_set(sd->widget, 1);
2088                     }
2089                   start = 1;
2090                }
2091              else
2092                sd->down.dir_y = 0;
2093           }
2094         if ((!sd->down.dir_x) && (!sd->down.dir_y))
2095           {
2096              sd->down.cancelled = 1;
2097           }
2098         if (start) _smart_drag_start(sd->smart_obj);
2099      }
2100    return EINA_TRUE;
2101 }
2102
2103 static void
2104 _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
2105 {
2106    Evas_Event_Mouse_Move *ev;
2107    Smart_Data *sd;
2108    Evas_Coord x = 0, y = 0;
2109
2110    sd = data;
2111    ev = event_info;
2112    //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
2113    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) sd->down.hold_parent = 1;
2114    evas_post_event_callback_push(e, _smart_event_post_move, sd);
2115    // FIXME: respect elm_widget_scroll_hold_get of parent container
2116    if (_elm_config->thumbscroll_enable)
2117      {
2118         if (sd->down.now)
2119           {
2120              int dodir = 0;
2121
2122 #ifdef SCROLLDBG
2123              printf("::: %i %i\n", ev->cur.canvas.x, ev->cur.canvas.y);
2124 #endif
2125              memmove(&(sd->down.history[1]), &(sd->down.history[0]),
2126                      sizeof(sd->down.history[0]) * (60 - 1));
2127 #ifdef EVTIME
2128              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
2129              sd->down.history[0].localtimestamp = ecore_loop_time_get();
2130 #else
2131              sd->down.history[0].timestamp = ecore_loop_time_get();
2132 #endif
2133              sd->down.history[0].x = ev->cur.canvas.x;
2134              sd->down.history[0].y = ev->cur.canvas.y;
2135
2136              if (!sd->down.dragged_began)
2137                {
2138                   x = ev->cur.canvas.x - sd->down.x;
2139                   y = ev->cur.canvas.y - sd->down.y;
2140
2141                   sd->down.hdir = -1;
2142                   sd->down.vdir = -1;
2143
2144                   if      (x > 0) sd->down.hdir = LEFT;
2145                   else if (x < 0) sd->down.hdir = RIGHT;
2146                   if      (y > 0) sd->down.vdir = UP;
2147                   else if (y < 0) sd->down.vdir = DOWN;
2148
2149                   if (x < 0) x = -x;
2150                   if (y < 0) y = -y;
2151
2152                   if ((sd->one_dir_at_a_time) &&
2153                       (!((sd->down.dir_x) || (sd->down.dir_y))))
2154                     {
2155                        if (x > _elm_config->thumbscroll_threshold)
2156                          {
2157                             if (x > (y * 2))
2158                               {
2159                                  sd->down.dir_x = 1;
2160                                  sd->down.dir_y = 0;
2161                                  dodir++;
2162                               }
2163                          }
2164                        if (y > _elm_config->thumbscroll_threshold)
2165                          {
2166                             if (y > (x * 2))
2167                               {
2168                                  sd->down.dir_x = 0;
2169                                  sd->down.dir_y = 1;
2170                                  dodir++;
2171                               }
2172                          }
2173                        if (!dodir)
2174                          {
2175                             sd->down.dir_x = 1;
2176                             sd->down.dir_y = 1;
2177                          }
2178                     }
2179                   else
2180                     {
2181                        //                       can_scroll(sd, LEFT);
2182                        //                       can_scroll(sd, RIGHT);
2183                        //                       can_scroll(sd, UP);
2184                        //                       can_scroll(sd, DOWN);
2185                        sd->down.dir_x = 1;
2186                        sd->down.dir_y = 1;
2187                     }
2188                }
2189              if ((!sd->hold) && (!sd->freeze))
2190                {
2191                   if ((sd->down.dragged) ||
2192                       (((x * x) + (y * y)) >
2193                        (_elm_config->thumbscroll_threshold *
2194                         _elm_config->thumbscroll_threshold)))
2195                     {
2196                        sd->down.dragged_began = 1;
2197                        if (!sd->down.dragged)
2198                          {
2199                             sd->down.want_dragged = 1;
2200                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2201                             //                            evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2202                             //                            _smart_drag_start(sd->smart_obj);
2203                          }
2204                        if (sd->down.dragged)
2205                          {
2206                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2207                          }
2208                        //                       ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2209                        //                       sd->down.dragged = 1;
2210                        if (sd->down.dir_x)
2211                          x = sd->down.sx - (ev->cur.canvas.x - sd->down.x);
2212                        else
2213                          x = sd->down.sx;
2214                        if (sd->down.dir_y)
2215                          y = sd->down.sy - (ev->cur.canvas.y - sd->down.y);
2216                        else
2217                          y = sd->down.sy;
2218                        if ((sd->down.dir_x) || (sd->down.dir_y))
2219                          {
2220                             if (!sd->down.locked)
2221                               {
2222                                  sd->down.locked_x = x;
2223                                  sd->down.locked_y = y;
2224                                  sd->down.locked = 1;
2225                               }
2226                             if (!((sd->down.dir_x) && (sd->down.dir_y)))
2227                               {
2228                                  if (sd->down.dir_x) y = sd->down.locked_y;
2229                                  else x = sd->down.locked_x;
2230                               }
2231                          }
2232                          {
2233                             Evas_Coord minx, miny;
2234                             sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2235                             if (y < miny)
2236                               y += (miny - y) *
2237                                  _elm_config->thumbscroll_border_friction;
2238                             else if (sd->child.h <= sd->h)
2239                               y += (sd->down.sy - y) *
2240                                  _elm_config->thumbscroll_border_friction;
2241                             else if ((sd->child.h - sd->h + miny) < y)
2242                               y += (sd->child.h - sd->h + miny - y) *
2243                                  _elm_config->thumbscroll_border_friction;
2244                             if (x < minx)
2245                               x += (minx - x) *
2246                                  _elm_config->thumbscroll_border_friction;
2247                             else if (sd->child.w <= sd->w)
2248                               x += (sd->down.sx - x) *
2249                                  _elm_config->thumbscroll_border_friction;
2250                             else if ((sd->child.w - sd->w + minx) < x)
2251                               x += (sd->child.w - sd->w + minx - x) *
2252                                  _elm_config->thumbscroll_border_friction;
2253                          }
2254
2255                        sd->down.hold_x = x;
2256                        sd->down.hold_y = y;
2257                        if (!sd->down.hold_animator)
2258                          sd->down.hold_animator =
2259                             ecore_animator_add(_smart_hold_animator, sd);
2260                        //                       printf("a %i %i\n", sd->down.hold_x, sd->down.hold_y);
2261                        //                       _smart_onhold_animator(sd);
2262                        //                       elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2263                     }
2264                   else
2265                     {
2266                        if (sd->down.dragged_began)
2267                          {
2268                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2269                             if (!sd->down.hold)
2270                               {
2271                                  sd->down.hold = 1;
2272                                  evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2273                               }
2274                          }
2275                     }
2276                }
2277              else if (!sd->freeze)
2278                {
2279                   Evas_Coord ex, ey, ew, eh;
2280                   double vx = 0.0, vy = 0.0;
2281
2282                   evas_object_geometry_get(sd->event_obj, &ex, &ey, &ew, &eh);
2283                   x = ev->cur.canvas.x - ex;
2284                   y = ev->cur.canvas.y - ey;
2285                   if (x < _elm_config->thumbscroll_threshold)
2286                     {
2287                        if (_elm_config->thumbscroll_threshold > 0.0)
2288                          vx = -(double)(_elm_config->thumbscroll_threshold - x) /
2289                             _elm_config->thumbscroll_threshold;
2290                        else
2291                          vx = -1.0;
2292                     }
2293                   else if (x > (ew - _elm_config->thumbscroll_threshold))
2294                     {
2295                        if (_elm_config->thumbscroll_threshold > 0.0)
2296                          vx = (double)(_elm_config->thumbscroll_threshold - (ew - x)) /
2297                             _elm_config->thumbscroll_threshold;
2298                        else
2299                          vx = 1.0;
2300                     }
2301                   if (y < _elm_config->thumbscroll_threshold)
2302                     {
2303                        if (_elm_config->thumbscroll_threshold > 0.0)
2304                          vy = -(double)(_elm_config->thumbscroll_threshold - y) /
2305                             _elm_config->thumbscroll_threshold;
2306                        else
2307                          vy = -1.0;
2308                     }
2309                   else if (y > (eh - _elm_config->thumbscroll_threshold))
2310                     {
2311                        if (_elm_config->thumbscroll_threshold > 0.0)
2312                          vy = (double)(_elm_config->thumbscroll_threshold - (eh - y)) /
2313                             _elm_config->thumbscroll_threshold;
2314                        else
2315                          vy = 1.0;
2316                     }
2317                   if ((vx != 0.0) || (vy != 0.0))
2318                     {
2319                        sd->down.onhold_vx = vx;
2320                        sd->down.onhold_vy = vy;
2321                        if (!sd->down.onhold_animator)
2322                          {
2323                             sd->down.onhold_vxe = 0.0;
2324                             sd->down.onhold_vye = 0.0;
2325                             sd->down.onhold_tlast = 0.0;
2326                             sd->down.onhold_animator = ecore_animator_add(_smart_onhold_animator, sd);
2327                          }
2328                        //                       printf("b %i %i\n", sd->down.hold_x, sd->down.hold_y);
2329                     }
2330                   else
2331                     {
2332                        if (sd->down.onhold_animator)
2333                          {
2334                             ecore_animator_del(sd->down.onhold_animator);
2335                             sd->down.onhold_animator = NULL;
2336                          }
2337                     }
2338                }
2339           }
2340      }
2341 }
2342
2343 static void
2344 _smart_scrollbar_read(Smart_Data *sd)
2345 {
2346    Evas_Coord x, y, mx = 0, my = 0, px, py, minx = 0, miny = 0;
2347    double vx, vy;
2348
2349    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2350    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2351    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2352    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2353    x = vx * (double)mx + minx;
2354    y = vy * (double)my + miny;
2355    sd->pan_func.get(sd->pan_obj, &px, &py);
2356    sd->pan_func.set(sd->pan_obj, x, y);
2357    if ((px != x) || (py != y))
2358      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2359 }
2360
2361 static void
2362 _smart_scrollbar_reset(Smart_Data *sd)
2363 {
2364    Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2365
2366    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2367    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2368    if ((!sd->child_obj) && (!sd->extern_pan))
2369      {
2370         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2371         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2372      }
2373    if (sd->pan_obj)
2374      {
2375         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2376         sd->pan_func.get(sd->pan_obj, &px, &py);
2377         sd->pan_func.set(sd->pan_obj, minx, miny);
2378      }
2379    if ((px != minx) || (py != miny))
2380      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2381 }
2382
2383 static int
2384 _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd)
2385 {
2386    int scroll_v_vis_change = 0;
2387    Evas_Coord h, vw = 0, vh = 0;
2388
2389    h = sd->child.h;
2390    if (sd->pan_obj)
2391      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2392    if (sd->vbar_visible)
2393      {
2394         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2395           {
2396              if ((sd->child_obj) || (sd->extern_pan))
2397                {
2398                   if (h <= vh)
2399                     {
2400                        scroll_v_vis_change = 1;
2401                        sd->vbar_visible = 0;
2402                     }
2403                }
2404              else
2405                {
2406                   scroll_v_vis_change = 1;
2407                   sd->vbar_visible = 0;
2408                }
2409           }
2410         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2411           {
2412              scroll_v_vis_change = 1;
2413              sd->vbar_visible = 0;
2414           }
2415      }
2416    else
2417      {
2418         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2419           {
2420              if ((sd->child_obj) || (sd->extern_pan))
2421                {
2422                   if (h > vh)
2423                     {
2424                        scroll_v_vis_change = 1;
2425                        sd->vbar_visible = 1;
2426                     }
2427                }
2428           }
2429         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2430           {
2431              scroll_v_vis_change = 1;
2432              sd->vbar_visible = 1;
2433           }
2434      }
2435    if (scroll_v_vis_change)
2436      {
2437         if (sd->vbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2438           {
2439              if (sd->vbar_visible)
2440                edje_object_signal_emit(sd->edje_obj, "elm,action,show,vbar", "elm");
2441              else
2442                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2443              edje_object_message_signal_process(sd->edje_obj);
2444              _smart_scrollbar_size_adjust(sd);
2445           }
2446         else
2447           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2448      }
2449    return scroll_v_vis_change;
2450 }
2451
2452 static int
2453 _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd)
2454 {
2455    int scroll_h_vis_change = 0;
2456    Evas_Coord w, vw = 0, vh = 0;
2457
2458    w = sd->child.w;
2459    if (sd->pan_obj)
2460      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2461    if (sd->hbar_visible)
2462      {
2463         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2464           {
2465              if ((sd->child_obj) || (sd->extern_pan))
2466                {
2467                   if (w <= vw)
2468                     {
2469                        scroll_h_vis_change = 1;
2470                        sd->hbar_visible = 0;
2471                     }
2472                }
2473              else
2474                {
2475                   scroll_h_vis_change = 1;
2476                   sd->hbar_visible = 0;
2477                }
2478           }
2479         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2480           {
2481              scroll_h_vis_change = 1;
2482              sd->hbar_visible = 0;
2483           }
2484      }
2485    else
2486      {
2487         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2488           {
2489              if ((sd->child_obj) || (sd->extern_pan))
2490                {
2491                   if (w > vw)
2492                     {
2493                        scroll_h_vis_change = 1;
2494                        sd->hbar_visible = 1;
2495                     }
2496                }
2497           }
2498         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2499           {
2500              scroll_h_vis_change = 1;
2501              sd->hbar_visible = 1;
2502           }
2503      }
2504    if (scroll_h_vis_change)
2505      {
2506         if (sd->hbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2507           {
2508              if (sd->hbar_visible)
2509                edje_object_signal_emit(sd->edje_obj, "elm,action,show,hbar", "elm");
2510              else
2511                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2512              edje_object_message_signal_process(sd->edje_obj);
2513              _smart_scrollbar_size_adjust(sd);
2514           }
2515         else
2516           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2517         _smart_scrollbar_size_adjust(sd);
2518      }
2519    return scroll_h_vis_change;
2520 }
2521
2522 static void
2523 _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd)
2524 {
2525    int changed = 0;
2526
2527    changed |= _smart_scrollbar_bar_h_visibility_adjust(sd);
2528    changed |= _smart_scrollbar_bar_v_visibility_adjust(sd);
2529    if (changed)
2530      {
2531         _smart_scrollbar_bar_h_visibility_adjust(sd);
2532         _smart_scrollbar_bar_v_visibility_adjust(sd);
2533      }
2534 }
2535
2536 static void
2537 _smart_scrollbar_size_adjust(Smart_Data *sd)
2538 {
2539    if ((sd->child_obj) || (sd->extern_pan))
2540      {
2541         Evas_Coord x, y, w, h, mx = 0, my = 0, vw = 0, vh = 0, px, py, minx = 0, miny = 0;
2542         double vx, vy, size;
2543
2544         edje_object_part_geometry_get(sd->edje_obj, "elm.swallow.content",
2545                                       NULL, NULL, &vw, &vh);
2546         w = sd->child.w;
2547         if (w < 1) w = 1;
2548         size = (double)vw / (double)w;
2549         if (size > 1.0)
2550           {
2551              size = 1.0;
2552              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2553           }
2554         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", size, 1.0);
2555
2556         h = sd->child.h;
2557         if (h < 1) h = 1;
2558         size = (double)vh / (double)h;
2559         if (size > 1.0)
2560           {
2561              size = 1.0;
2562              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2563           }
2564         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, size);
2565
2566         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2567         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2568         sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2569         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2570         x = vx * mx + minx;
2571         y = vy * my + miny;
2572
2573         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->step.x / (double)w, 0.0);
2574         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->step.y / (double)h);
2575         if (sd->page.x > 0)
2576           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->page.x / (double)w, 0.0);
2577         else
2578           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", -((double)sd->page.x * ((double)vw / (double)w)) / 100.0, 0.0);
2579         if (sd->page.y > 0)
2580           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->page.y / (double)h);
2581         else
2582           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, -((double)sd->page.y * ((double)vh / (double)h)) / 100.0);
2583
2584         sd->pan_func.get(sd->pan_obj, &px, &py);
2585         if (vx != mx) x = px;
2586         if (vy != my) y = py;
2587         sd->pan_func.set(sd->pan_obj, x, y);
2588         //      if ((px != 0) || (py != 0))
2589         //        edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2590      }
2591    else
2592      {
2593         Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2594
2595         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2596         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2597         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2598         sd->pan_func.get(sd->pan_obj, &px, &py);
2599         sd->pan_func.set(sd->pan_obj, minx, miny);
2600         if ((px != minx) || (py != miny))
2601           edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2602      }
2603    _smart_scrollbar_bar_visibility_adjust(sd);
2604 }
2605
2606 static void
2607 _smart_reconfigure(Smart_Data *sd)
2608 {
2609    evas_object_move(sd->edje_obj, sd->x, sd->y);
2610    evas_object_resize(sd->edje_obj, sd->w, sd->h);
2611    evas_object_move(sd->event_obj, sd->x, sd->y);
2612    evas_object_resize(sd->event_obj, sd->w, sd->h);
2613    _smart_scrollbar_size_adjust(sd);
2614 }
2615
2616 static void
2617 _smart_add(Evas_Object *obj)
2618 {
2619    Smart_Data *sd;
2620    Evas_Object *o;
2621
2622    sd = calloc(1, sizeof(Smart_Data));
2623    if (!sd) return;
2624    evas_object_smart_data_set(obj, sd);
2625
2626    sd->smart_obj = obj;
2627    sd->x = 0;
2628    sd->y = 0;
2629    sd->w = 0;
2630    sd->h = 0;
2631    sd->step.x = 32;
2632    sd->step.y = 32;
2633    sd->page.x = -50;
2634    sd->page.y = -50;
2635    sd->hbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2636    sd->vbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2637    sd->hbar_visible = 1;
2638    sd->vbar_visible = 1;
2639
2640    sd->bounce_horiz = 1;
2641    sd->bounce_vert = 1;
2642
2643    sd->one_dir_at_a_time = 1;
2644    sd->momentum_animator_disabled = EINA_FALSE;
2645    sd->bounce_animator_disabled = EINA_FALSE;
2646
2647    o = edje_object_add(evas_object_evas_get(obj));
2648    evas_object_propagate_events_set(o, 0);
2649    sd->edje_obj = o;
2650    elm_smart_scroller_object_theme_set(NULL, obj, "scroller", "base", "default");
2651    edje_object_signal_callback_add(o, "drag", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2652    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.vbar", _smart_edje_drag_v_start, sd);
2653    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.vbar", _smart_edje_drag_v_stop, sd);
2654    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2655    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2656    edje_object_signal_callback_add(o, "drag", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2657    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.hbar", _smart_edje_drag_h_start, sd);
2658    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.hbar", _smart_edje_drag_h_stop, sd);
2659    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2660    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2661    evas_object_smart_member_add(o, obj);
2662
2663    o = evas_object_rectangle_add(evas_object_evas_get(obj));
2664    sd->event_obj = o;
2665    evas_object_color_set(o, 0, 0, 0, 0);
2666    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
2667    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN, _smart_event_mouse_down, sd);
2668    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_UP, _smart_event_mouse_up, sd);
2669    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_MOVE, _smart_event_mouse_move, sd);
2670    evas_object_smart_member_add(o, obj);
2671    evas_object_repeat_events_set(o, 1);
2672
2673    sd->pan_func.set = _elm_smart_pan_set;
2674    sd->pan_func.get = _elm_smart_pan_get;
2675    sd->pan_func.max_get = _elm_smart_pan_max_get;
2676    sd->pan_func.min_get = _elm_smart_pan_min_get;
2677    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
2678
2679    _smart_scrollbar_reset(sd);
2680 }
2681
2682 static void
2683 _smart_del(Evas_Object *obj)
2684 {
2685    INTERNAL_ENTRY;
2686    elm_smart_scroller_child_set(obj, NULL);
2687    if (!sd->extern_pan) evas_object_del(sd->pan_obj);
2688    evas_object_del(sd->edje_obj);
2689    evas_object_del(sd->event_obj);
2690    if (sd->down.hold_animator) ecore_animator_del(sd->down.hold_animator);
2691    if (sd->down.onhold_animator) ecore_animator_del(sd->down.onhold_animator);
2692    if (sd->down.momentum_animator) ecore_animator_del(sd->down.momentum_animator);
2693    if (sd->down.bounce_x_animator) ecore_animator_del(sd->down.bounce_x_animator);
2694    if (sd->down.bounce_y_animator) ecore_animator_del(sd->down.bounce_y_animator);
2695    if (sd->scrollto.x.animator) ecore_animator_del(sd->scrollto.x.animator);
2696    if (sd->scrollto.y.animator) ecore_animator_del(sd->scrollto.y.animator);
2697    free(sd);
2698    evas_object_smart_data_set(obj, NULL);
2699 }
2700
2701 static void
2702 _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
2703 {
2704    INTERNAL_ENTRY;
2705    sd->x = x;
2706    sd->y = y;
2707    _smart_reconfigure(sd);
2708 }
2709
2710 static void
2711 _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
2712 {
2713    INTERNAL_ENTRY;
2714    sd->w = w;
2715    sd->h = h;
2716    _smart_reconfigure(sd);
2717    _elm_smart_scroller_wanted_region_set(obj);
2718 }
2719
2720 static void
2721 _smart_show(Evas_Object *obj)
2722 {
2723    INTERNAL_ENTRY;
2724    evas_object_show(sd->edje_obj);
2725    evas_object_show(sd->event_obj);
2726 }
2727
2728 static void
2729 _smart_hide(Evas_Object *obj)
2730 {
2731    INTERNAL_ENTRY;
2732    evas_object_hide(sd->edje_obj);
2733    evas_object_hide(sd->event_obj);
2734 }
2735
2736 static void
2737 _smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
2738 {
2739    INTERNAL_ENTRY;
2740    evas_object_color_set(sd->edje_obj, r, g, b, a);
2741 }
2742
2743 static void
2744 _smart_clip_set(Evas_Object *obj, Evas_Object *clip)
2745 {
2746    INTERNAL_ENTRY;
2747    evas_object_clip_set(sd->edje_obj, clip);
2748    evas_object_clip_set(sd->event_obj, clip);
2749 }
2750
2751 static void
2752 _smart_clip_unset(Evas_Object *obj)
2753 {
2754    INTERNAL_ENTRY;
2755    evas_object_clip_unset(sd->edje_obj);
2756    evas_object_clip_unset(sd->event_obj);
2757 }
2758
2759 /* never need to touch this */
2760
2761 static void
2762 _smart_init(void)
2763 {
2764    if (_smart) return;
2765      {
2766         static const Evas_Smart_Class sc =
2767           {
2768              SMART_NAME,
2769              EVAS_SMART_CLASS_VERSION,
2770              _smart_add,
2771              _smart_del,
2772              _smart_move,
2773              _smart_resize,
2774              _smart_show,
2775              _smart_hide,
2776              _smart_color_set,
2777              _smart_clip_set,
2778              _smart_clip_unset,
2779              NULL,
2780              NULL,
2781              NULL,
2782              NULL,
2783              NULL,
2784              NULL,
2785              NULL
2786           };
2787         _smart = evas_smart_class_new(&sc);
2788      }
2789 }