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;
  40       } history[20];
  41       double anim_start;
  42       double anim_start2;
  43       double anim_start3;
  44       double onhold_vx, onhold_vy, onhold_tlast, onhold_vxe, onhold_vye;
  45       double extra_time;
  46       Evas_Coord hold_x, hold_y;
  47       Ecore_Animator *hold_animator;
  48       Ecore_Animator *onhold_animator;
  49       Ecore_Animator *momentum_animator;
  50       Ecore_Animator *bounce_x_animator;
  51       Ecore_Animator *bounce_y_animator;
  52       Evas_Coord locked_x, locked_y;
  53       int hdir, vdir;
  54       unsigned char now : 1;
  55       unsigned char cancelled : 1;
  56       unsigned char hold : 1;
  57       unsigned char hold_parent : 1;
  58       unsigned char want_dragged : 1;
  59       unsigned char dragged : 1;
  60       unsigned char dragged_began : 1;
  61       unsigned char dir_x : 1;
  62       unsigned char dir_y : 1;
  63       unsigned char locked : 1;
  64       unsigned char bounce_x_hold : 1;
  65       unsigned char bounce_y_hold : 1;
  66       unsigned char scroll : 1;
  67    } down;
  68
  69    struct {
  70       Evas_Coord w, h;
  71    } child;
  72    struct {
  73       Evas_Coord x, y;
  74    } step, page;
  75
  76    struct {
  77       void (*set) (Evas_Object *obj, Evas_Coord x, Evas_Coord y);
  78       void (*get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  79       void (*max_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  80       void (*min_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  81       void (*child_size_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y);
  82    } pan_func;
  83
  84    struct {
  85       struct {
  86          Evas_Coord start, end;
  87          double t_start, t_end;
  88          Ecore_Animator *animator;
  89       } x, y;
  90    } scrollto;
  91
  92    double pagerel_h, pagerel_v;
  93    Evas_Coord pagesize_h, pagesize_v;
  94
  95    unsigned char hbar_visible : 1;
  96    unsigned char vbar_visible : 1;
  97    unsigned char extern_pan : 1;
  98    unsigned char one_dir_at_a_time : 1;
  99    unsigned char hold : 1;
 100    unsigned char freeze : 1;
 101    unsigned char bouncemex : 1;
 102    unsigned char bouncemey : 1;
 103    unsigned char bounce_horiz : 1;
 104    unsigned char bounce_vert : 1;
 105    unsigned char momentum_animator_disabled :1;
 106    unsigned char bounce_animator_disabled :1;
 107    Eina_Bool is_mirrored : 1;
 108 };
 109
 110 /* local subsystem functions */
 111 static void _smart_child_del_hook(void *data, Evas *e, Evas_Object *obj, void *event_info);
 112 static void _smart_pan_changed_hook(void *data, Evas_Object *obj, void *event_info);
 113 static void _smart_pan_pan_changed_hook(void *data, Evas_Object *obj, void *event_info);
 114 static void _smart_event_wheel(void *data, Evas *e, Evas_Object *obj, void *event_info);
 115 static void _smart_event_mouse_down(void *data, Evas *e, Evas_Object *obj, void *event_info);
 116 static Eina_Bool  _smart_hold_animator(void *data);
 117 static Eina_Bool  _smart_momentum_animator(void *data);
 118 static void _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj, void *event_info);
 119 static Eina_Bool  _smart_onhold_animator(void *data);
 120 static void _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj, void *event_info);
 121 static void _smart_edje_drag_v_start(void *data, Evas_Object *obj, const char *emission, const char *source);
 122 static void _smart_edje_drag_v_stop(void *data, Evas_Object *obj, const char *emission, const char *source);
 123 static void _smart_edje_drag_v(void *data, Evas_Object *obj, const char *emission, const char *source);
 124 static void _smart_edje_drag_h_start(void *data, Evas_Object *obj, const char *emission, const char *source);
 125 static void _smart_edje_drag_h_stop(void *data, Evas_Object *obj, const char *emission, const char *source);
 126 static void _smart_edje_drag_h(void *data, Evas_Object *obj, const char *emission, const char *source);
 127 static void _smart_scrollbar_read(Smart_Data *sd);
 128 static void _smart_scrollbar_reset(Smart_Data *sd);
 129 static int  _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd);
 130 static int  _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd);
 131 static void _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd);
 132 static void _smart_scrollbar_size_adjust(Smart_Data *sd);
 133 static void _smart_reconfigure(Smart_Data *sd);
 134 static void _smart_add(Evas_Object *obj);
 135 static void _smart_del(Evas_Object *obj);
 136 static void _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y);
 137 static void _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h);
 138 static void _smart_show(Evas_Object *obj);
 139 static void _smart_hide(Evas_Object *obj);
 140 static void _smart_color_set(Evas_Object *obj, int r, int g, int b, int a);
 141 static void _smart_clip_set(Evas_Object *obj, Evas_Object *clip);
 142 static void _smart_clip_unset(Evas_Object *obj);
 143 static void _smart_init(void);
 144
 145 /* local subsystem globals */
 146 static Evas_Smart *_smart = NULL;
 147
 148 /* externally accessible functions */
 149 Evas_Object *
 150 elm_smart_scroller_add(Evas *evas)
 151 {
 152    _smart_init();
 153    return evas_object_smart_add(evas, _smart);
 154 }
 155
 156 static Evas_Coord
 157 _elm_smart_scroller_x_mirrored_get(Evas_Object *obj, Evas_Coord x)
 158 {
 159    API_ENTRY return x;
 160
 161    Evas_Coord cw, ch, w, ret;
 162    elm_smart_scroller_child_viewport_size_get(obj, &w, NULL);
 163    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 164    ret = (cw - (x + w));
 165    return (ret >= 0) ? ret : 0;
 166 }
 167
 168 void
 169 elm_smart_scroller_mirrored_set(Evas_Object *obj, Eina_Bool mirrored)
 170 {
 171    API_ENTRY return;
 172    Evas_Coord wx;
 173    if (sd->is_mirrored == mirrored)
 174      return;
 175
 176    sd->is_mirrored = mirrored;
 177    edje_object_mirrored_set(sd->edje_obj, mirrored);
 178
 179    if (sd->is_mirrored)
 180      wx = _elm_smart_scroller_x_mirrored_get(sd->smart_obj, sd->wx);
 181    else
 182      wx = sd->wx;
 183
 184    elm_smart_scroller_child_pos_set(sd->smart_obj, wx, sd->wy);
 185 }
 186
 187 void
 188 elm_smart_scroller_child_set(Evas_Object *obj, Evas_Object *child)
 189 {
 190    Evas_Coord w, h;
 191    Evas_Object *o;
 192
 193    API_ENTRY return;
 194    if (sd->child_obj)
 195      {
 196         _elm_smart_pan_child_set(sd->pan_obj, NULL);
 197         evas_object_event_callback_del_full(sd->child_obj, EVAS_CALLBACK_DEL, _smart_child_del_hook, sd);
 198      }
 199
 200    sd->child_obj = child;
 201    sd->wx = sd->wy = 0;
 202    /* (-1) means want viewports size */
 203    sd->ww = sd->wh = -1;
 204    if (!child) return;
 205
 206    if (!sd->pan_obj)
 207      {
 208         o = _elm_smart_pan_add(evas_object_evas_get(obj));
 209         sd->pan_obj = o;
 210         evas_object_smart_callback_add(o, "changed", _smart_pan_changed_hook, sd);
 211         evas_object_smart_callback_add(o, "pan_changed", _smart_pan_pan_changed_hook, sd);
 212         edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", o);
 213      }
 214
 215    sd->pan_func.set = _elm_smart_pan_set;
 216    sd->pan_func.get = _elm_smart_pan_get;
 217    sd->pan_func.max_get = _elm_smart_pan_max_get;
 218    sd->pan_func.min_get = _elm_smart_pan_min_get;
 219    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
 220
 221    evas_object_event_callback_add(child, EVAS_CALLBACK_DEL, _smart_child_del_hook, sd);
 222    _elm_smart_pan_child_set(sd->pan_obj, child);
 223    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
 224    sd->child.w = w;
 225    sd->child.h = h;
 226    _smart_scrollbar_size_adjust(sd);
 227    _smart_scrollbar_reset(sd);
 228 }
 229
 230 void
 231 elm_smart_scroller_extern_pan_set(Evas_Object *obj, Evas_Object *pan,
 232                                   void (*pan_set) (Evas_Object *obj, Evas_Coord x, Evas_Coord y),
 233                                   void (*pan_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 234                                   void (*pan_max_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 235                                   void (*pan_min_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y),
 236                                   void (*pan_child_size_get) (Evas_Object *obj, Evas_Coord *x, Evas_Coord *y))
 237 {
 238    API_ENTRY return;
 239
 240    elm_smart_scroller_child_set(obj, NULL);
 241
 242    if (sd->pan_obj)
 243      {
 244         evas_object_smart_callback_del(sd->pan_obj, "changed", _smart_pan_changed_hook);
 245         evas_object_smart_callback_del(sd->pan_obj, "pan_changed", _smart_pan_pan_changed_hook);
 246      }
 247
 248    if (sd->extern_pan)
 249      {
 250         if (sd->pan_obj)
 251           {
 252              edje_object_part_unswallow(sd->edje_obj, sd->pan_obj);
 253              sd->pan_obj = NULL;
 254           }
 255      }
 256    else
 257      {
 258         if (sd->pan_obj)
 259           {
 260              evas_object_del(sd->pan_obj);
 261              sd->pan_obj = NULL;
 262           }
 263      }
 264    if (!pan)
 265      {
 266         sd->extern_pan = 0;
 267         return;
 268      }
 269
 270    sd->pan_obj = pan;
 271    sd->pan_func.set = pan_set;
 272    sd->pan_func.get = pan_get;
 273    sd->pan_func.max_get = pan_max_get;
 274    sd->pan_func.min_get = pan_min_get;
 275    sd->pan_func.child_size_get = pan_child_size_get;
 276    sd->extern_pan = 1;
 277    evas_object_smart_callback_add(sd->pan_obj, "changed", _smart_pan_changed_hook, sd);
 278    evas_object_smart_callback_add(sd->pan_obj, "pan_changed", _smart_pan_pan_changed_hook, sd);
 279    edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
 280    evas_object_show(sd->pan_obj);
 281 }
 282
 283 void
 284 elm_smart_scroller_custom_edje_file_set(Evas_Object *obj, char *file, char *group)
 285 {
 286    API_ENTRY return;
 287
 288    edje_object_file_set(sd->edje_obj, file, group);
 289    if (sd->pan_obj)
 290      edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
 291    sd->vbar_visible = !sd->vbar_visible;
 292    sd->hbar_visible = !sd->hbar_visible;
 293    _smart_scrollbar_bar_visibility_adjust(sd);
 294    if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
 295      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,hbar", "elm");
 296    else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
 297      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
 298    else
 299      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,hbar", "elm");
 300    if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
 301      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,vbar", "elm");
 302    else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
 303      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
 304    else
 305      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,vbar", "elm");
 306 }
 307
 308 Eina_Bool
 309 elm_smart_scroller_momentum_animator_disabled_get(Evas_Object *obj)
 310 {
 311    API_ENTRY return EINA_FALSE;
 312    return sd->momentum_animator_disabled;
 313 }
 314
 315 void
 316 elm_smart_scroller_momentum_animator_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 317 {
 318    API_ENTRY return;
 319    sd->momentum_animator_disabled = disabled;
 320    if (sd->momentum_animator_disabled)
 321      {
 322         if (sd->down.momentum_animator)
 323           {
 324              ecore_animator_del(sd->down.momentum_animator);
 325              sd->down.momentum_animator = NULL;
 326           }
 327      }
 328 }
 329
 330 Eina_Bool
 331 elm_smart_scroller_bounce_animator_disabled_get(Evas_Object *obj)
 332 {
 333    API_ENTRY return EINA_FALSE;
 334    return sd->bounce_animator_disabled;
 335 }
 336
 337 void
 338 elm_smart_scroller_bounce_animator_disabled_set(Evas_Object *obj, Eina_Bool disabled)
 339 {
 340    API_ENTRY return;
 341    sd->bounce_animator_disabled = disabled;
 342    if (sd->bounce_animator_disabled)
 343      {
 344         if (sd->scrollto.x.animator)
 345           {
 346              ecore_animator_del(sd->scrollto.x.animator);
 347              sd->scrollto.x.animator = NULL;
 348           }
 349
 350         if (sd->scrollto.y.animator)
 351           {
 352              ecore_animator_del(sd->scrollto.y.animator);
 353              sd->scrollto.y.animator = NULL;
 354           }
 355      }
 356 }
 357
 358 /* Update the wanted coordinates according to the x, y passed
 359  * widget directionality, child size and etc. */
 360 static void
 361 _update_wanted_coordinates(Smart_Data *sd, Evas_Coord x, Evas_Coord y)
 362 {
 363    Evas_Coord cw, ch;
 364
 365    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 366
 367    /* Update wx/y/w/h - and if the requested positions aren't legal
 368     * adjust a bit. */
 369    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &sd->ww, &sd->wh);
 370    if (x < 0)
 371       sd->wx = 0;
 372    else if ((x + sd->ww) > cw)
 373       sd->wx = cw - sd->ww;
 374    else if (sd->is_mirrored)
 375       sd->wx = _elm_smart_scroller_x_mirrored_get(sd->smart_obj, x);
 376    else
 377       sd->wx = x;
 378    if (y < 0) sd->wy = 0;
 379    else if ((y + sd->wh) > ch) sd->wy = ch - sd->wh;
 380    else sd->wy = y;
 381 }
 382
 383 static void
 384 _smart_anim_start(Evas_Object *obj)
 385 {
 386    evas_object_smart_callback_call(obj, "animate,start", NULL);
 387 }
 388
 389 static void
 390 _smart_anim_stop(Evas_Object *obj)
 391 {
 392    evas_object_smart_callback_call(obj, "animate,stop", NULL);
 393 }
 394
 395 static void
 396 _smart_drag_start(Evas_Object *obj)
 397 {
 398    evas_object_smart_callback_call(obj, "drag,start", NULL);
 399 }
 400
 401 static void
 402 _smart_drag_stop(Evas_Object *obj)
 403 {
 404    evas_object_smart_callback_call(obj, "drag,stop", NULL);
 405 }
 406
 407 static Eina_Bool
 408 _smart_scrollto_x_animator(void *data)
 409 {
 410    Smart_Data *sd = data;
 411    Evas_Coord px, py;
 412    double t, tt;
 413
 414    t = ecore_loop_time_get();
 415    tt = (t - sd->scrollto.x.t_start) / (sd->scrollto.x.t_end - sd->scrollto.x.t_start);
 416    tt = 1.0 - tt;
 417    tt = 1.0 - (tt * tt);
 418    sd->pan_func.get(sd->pan_obj, &px, &py);
 419    px = (sd->scrollto.x.start * (1.0 - tt)) +
 420      (sd->scrollto.x.end * tt);
 421    if (t >= sd->scrollto.x.t_end)
 422      {
 423         px = sd->scrollto.x.end;
 424         elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 425         sd->scrollto.x.animator = NULL;
 426         if ((!sd->scrollto.y.animator) && (!sd->down.bounce_y_animator))
 427           _smart_anim_stop(sd->smart_obj);
 428         return ECORE_CALLBACK_CANCEL;
 429      }
 430    elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 431    return ECORE_CALLBACK_RENEW;
 432 }
 433
 434 static void
 435 _smart_momentum_end(Smart_Data *sd)
 436 {
 437    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator)) return;
 438    if (sd->down.momentum_animator)
 439      {
 440         Evas_Coord px, py;
 441         elm_smart_scroller_child_pos_get(sd->smart_obj, &px, &py);
 442         _update_wanted_coordinates(sd, px, py);
 443
 444         ecore_animator_del(sd->down.momentum_animator);
 445         sd->down.momentum_animator = NULL;
 446         sd->down.bounce_x_hold = 0;
 447         sd->down.bounce_y_hold = 0;
 448         sd->down.ax = 0;
 449         sd->down.ay = 0;
 450         sd->down.pdx = 0;
 451         sd->down.pdy = 0;
 452      }
 453 }
 454
 455 static void
 456 _smart_scrollto_x(Smart_Data *sd, double t_in, Evas_Coord pos_x)
 457 {
 458    Evas_Coord px, py, x, y, w, h;
 459    double t;
 460
 461    if (sd->freeze) return;
 462    if (t_in <= 0.0)
 463      {
 464         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 465         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 466         x = pos_x;
 467         elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 468         return;
 469      }
 470    t = ecore_loop_time_get();
 471    sd->pan_func.get(sd->pan_obj, &px, &py);
 472    sd->scrollto.x.start = px;
 473    sd->scrollto.x.end = pos_x;
 474    sd->scrollto.x.t_start = t;
 475    sd->scrollto.x.t_end = t + t_in;
 476    if (!sd->scrollto.x.animator)
 477      {
 478         if (!sd->scrollto.y.animator)
 479           _smart_anim_start(sd->smart_obj);
 480         sd->scrollto.x.animator = ecore_animator_add(_smart_scrollto_x_animator, sd);
 481      }
 482    if (sd->down.bounce_x_animator)
 483      {
 484         ecore_animator_del(sd->down.bounce_x_animator);
 485         sd->down.bounce_x_animator = NULL;
 486         _smart_momentum_end(sd);
 487      }
 488    sd->bouncemex = 0;
 489 }
 490
 491 static Eina_Bool
 492 _smart_scrollto_y_animator(void *data)
 493 {
 494    Smart_Data *sd = data;
 495    Evas_Coord px, py;
 496    double t, tt;
 497
 498    t = ecore_loop_time_get();
 499    tt = (t - sd->scrollto.y.t_start) / (sd->scrollto.y.t_end - sd->scrollto.y.t_start);
 500    tt = 1.0 - tt;
 501    tt = 1.0 - (tt * tt);
 502    sd->pan_func.get(sd->pan_obj, &px, &py);
 503    py = (sd->scrollto.y.start * (1.0 - tt)) +
 504      (sd->scrollto.y.end * tt);
 505    if (t >= sd->scrollto.y.t_end)
 506      {
 507         py = sd->scrollto.y.end;
 508         elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 509         sd->scrollto.y.animator = NULL;
 510         if ((!sd->scrollto.x.animator) && (!sd->down.bounce_x_animator))
 511           _smart_anim_stop(sd->smart_obj);
 512         return ECORE_CALLBACK_CANCEL;
 513      }
 514    elm_smart_scroller_child_pos_set(sd->smart_obj, px, py);
 515
 516    return ECORE_CALLBACK_RENEW;
 517 }
 518
 519 static void
 520 _smart_scrollto_y(Smart_Data *sd, double t_in, Evas_Coord pos_y)
 521 {
 522    Evas_Coord px, py, x, y, w, h;
 523    double t;
 524
 525    if (sd->freeze) return;
 526    if (t_in <= 0.0)
 527      {
 528         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 529         elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 530         y = pos_y;
 531         elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 532         return;
 533      }
 534    t = ecore_loop_time_get();
 535    sd->pan_func.get(sd->pan_obj, &px, &py);
 536    sd->scrollto.y.start = py;
 537    sd->scrollto.y.end = pos_y;
 538    sd->scrollto.y.t_start = t;
 539    sd->scrollto.y.t_end = t + t_in;
 540    if (!sd->scrollto.y.animator)
 541      {
 542         if (!sd->scrollto.x.animator)
 543           _smart_anim_start(sd->smart_obj);
 544         sd->scrollto.y.animator = ecore_animator_add(_smart_scrollto_y_animator, sd);
 545      }
 546    if (sd->down.bounce_y_animator)
 547      {
 548         ecore_animator_del(sd->down.bounce_y_animator);
 549         sd->down.bounce_y_animator = NULL;
 550         _smart_momentum_end(sd);
 551      }
 552    sd->bouncemey = 0;
 553 }
 554
 555 static Eina_Bool
 556 _smart_do_page(Smart_Data *sd)
 557 {
 558    if ((sd->pagerel_h == 0.0) && (!sd->pagesize_h) &&
 559        (sd->pagerel_v == 0.0) && (!sd->pagesize_v))
 560      return EINA_FALSE;
 561    return EINA_TRUE;
 562 }
 563
 564 static Evas_Coord
 565 _smart_page_x_get(Smart_Data *sd, int offset)
 566 {
 567    Evas_Coord x, y, w, h, cw, ch, minx = 0;
 568
 569    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 570    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 571    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 572    sd->pan_func.min_get(sd->pan_obj, &minx, NULL);
 573
 574    x += offset;
 575
 576    if (sd->pagerel_h > 0.0)
 577      {
 578         x = x + (w * sd->pagerel_h * 0.5);
 579         x = x / (w * sd->pagerel_h);
 580         x = x * (w * sd->pagerel_h);
 581      }
 582    else if (sd->pagesize_h > 0)
 583      {
 584         x = x + (sd->pagesize_h * 0.5);
 585         x = x / (sd->pagesize_h);
 586         x = x * (sd->pagesize_h);
 587      }
 588    if (x < minx) x = minx;
 589    else if ((x + w) > cw) x = cw - w;
 590    return x;
 591 }
 592
 593 static Evas_Coord
 594 _smart_page_y_get(Smart_Data *sd, int offset)
 595 {
 596    Evas_Coord x, y, w, h, cw, ch, miny = 0;
 597
 598    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 599    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 600    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
 601    sd->pan_func.min_get(sd->pan_obj, NULL, &miny);
 602
 603    y += offset;
 604
 605    if (sd->pagerel_v > 0.0)
 606      {
 607         y = y + (h * sd->pagerel_v * 0.5);
 608         y = y / (h * sd->pagerel_v);
 609         y = y * (h * sd->pagerel_v);
 610      }
 611    else if (sd->pagesize_v > 0)
 612      {
 613         y = y + (sd->pagesize_v * 0.5);
 614         y = y / (sd->pagesize_v);
 615         y = y * (sd->pagesize_v);
 616      }
 617    if (y < miny) y = miny;
 618    else if ((y + h) > ch) y = ch - h;
 619    return y;
 620 }
 621
 622 static void
 623 _smart_page_adjust(Smart_Data *sd)
 624 {
 625    Evas_Coord x, y, w, h;
 626
 627    if (!_smart_do_page(sd)) return;
 628
 629    elm_smart_scroller_child_viewport_size_get(sd->smart_obj, &w, &h);
 630
 631    x = _smart_page_x_get(sd, 0);
 632    y = _smart_page_y_get(sd, 0);
 633
 634    elm_smart_scroller_child_region_set(sd->smart_obj, x, y, w, h);
 635 }
 636
 637 static Eina_Bool
 638 _smart_bounce_x_animator(void *data)
 639 {
 640    Smart_Data *sd;
 641    Evas_Coord x, y, dx;
 642    double t, p, dt;
 643
 644    sd = data;
 645    t = ecore_loop_time_get();
 646    dt = t - sd->down.anim_start2;
 647    if (dt >= 0.0)
 648      {
 649         dt = dt / _elm_config->thumbscroll_bounce_friction;
 650         if (dt > 1.0) dt = 1.0;
 651         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 652         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 653         dx = sd->down.b2x - sd->down.bx;
 654         dx = (dx * p);
 655         x = sd->down.bx + dx;
 656         if (!sd->down.cancelled)
 657           elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 658         if (dt >= 1.0)
 659           {
 660              if (sd->down.momentum_animator)
 661                sd->down.bounce_x_hold = 1;
 662              else if ((!sd->down.bounce_y_animator) &&
 663                  (!sd->scrollto.y.animator))
 664                _smart_anim_stop(sd->smart_obj);
 665              sd->down.bounce_x_animator = NULL;
 666              sd->down.pdx = 0;
 667              sd->bouncemex = 0;
 668              _smart_momentum_end(sd);
 669              return ECORE_CALLBACK_CANCEL;
 670           }
 671      }
 672    return ECORE_CALLBACK_RENEW;
 673 }
 674
 675 static Eina_Bool
 676 _smart_bounce_y_animator(void *data)
 677 {
 678    Smart_Data *sd;
 679    Evas_Coord x, y, dy;
 680    double t, p, dt;
 681
 682    sd = data;
 683    t = ecore_loop_time_get();
 684    dt = t - sd->down.anim_start3;
 685    if (dt >= 0.0)
 686      {
 687         dt = dt / _elm_config->thumbscroll_bounce_friction;
 688         if (dt > 1.0) dt = 1.0;
 689         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 690         elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
 691         dy = sd->down.b2y - sd->down.by;
 692         dy = (dy * p);
 693         y = sd->down.by + dy;
 694         if (!sd->down.cancelled)
 695           elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 696         if (dt >= 1.0)
 697           {
 698              if (sd->down.momentum_animator)
 699                sd->down.bounce_y_hold = 1;
 700              else if ((!sd->down.bounce_x_animator) &&
 701                  (!sd->scrollto.y.animator))
 702                _smart_anim_stop(sd->smart_obj);
 703              sd->down.bounce_y_animator = NULL;
 704              sd->down.pdy = 0;
 705              sd->bouncemey = 0;
 706              _smart_momentum_end(sd);
 707              return ECORE_CALLBACK_CANCEL;
 708           }
 709      }
 710    return ECORE_CALLBACK_RENEW;
 711 }
 712
 713 #define LEFT 0
 714 #define RIGHT 1
 715 #define UP 2
 716 #define DOWN 3
 717 static Eina_Bool
 718 can_scroll(Smart_Data *sd, int dir)
 719 {
 720    Evas_Coord mx = 0, my = 0, px = 0, py = 0, minx = 0, miny = 0;
 721
 722    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 723    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 724    sd->pan_func.get(sd->pan_obj, &px, &py);
 725    switch (dir)
 726      {
 727      case LEFT:
 728         if (px > minx) return EINA_TRUE;
 729         break;
 730      case RIGHT:
 731         if ((px - minx) < mx) return EINA_TRUE;
 732         break;
 733      case UP:
 734         if (py > miny) return EINA_TRUE;
 735         break;
 736      case DOWN:
 737         if ((py - miny) < my) return EINA_TRUE;
 738         break;
 739      default:
 740         break;
 741      }
 742    return EINA_FALSE;
 743 }
 744
 745 static Eina_Bool
 746 _smart_momentum_animator(void *data)
 747 {
 748    Smart_Data *sd;
 749    double t, dt, p;
 750    Evas_Coord x, y, dx, dy, px, py, maxx, maxy, minx, miny;
 751    Eina_Bool no_bounce_x_end = EINA_FALSE, no_bounce_y_end = EINA_FALSE;
 752
 753    sd = data;
 754    t = ecore_loop_time_get();
 755    dt = t - sd->down.anim_start;
 756    if (dt >= 0.0)
 757      {
 758         /*
 759         if (sd->down.hold_parent)
 760           {
 761              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
 762                {
 763                   sd->down.dir_x = 0;
 764                }
 765              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
 766                {
 767                   sd->down.dir_y = 0;
 768                }
 769           }
 770         if ((!sd->down.dir_x) && (!sd->down.dir_y))
 771           {
 772              sd->down.cancelled = 1;
 773           }
 774          */
 775         dt = dt / (_elm_config->thumbscroll_friction + sd->down.extra_time);
 776         if (dt > 1.0) dt = 1.0;
 777         p = 1.0 - ((1.0 - dt) * (1.0 - dt));
 778         dx = (sd->down.dx * (_elm_config->thumbscroll_friction + sd->down.extra_time) * p);
 779         dy = (sd->down.dy * (_elm_config->thumbscroll_friction + sd->down.extra_time) * p);
 780         sd->down.ax = dx;
 781         sd->down.ay = dy;
 782         x = sd->down.sx - dx;
 783         y = sd->down.sy - dy;
 784         elm_smart_scroller_child_pos_get(sd->smart_obj, &px, &py);
 785         if ((sd->down.bounce_x_animator) ||
 786             (sd->down.bounce_x_hold))
 787           {
 788              sd->down.bx = sd->down.bx0 - dx + sd->down.b0x;
 789              x = px;
 790           }
 791         if ((sd->down.bounce_y_animator) ||
 792             (sd->down.bounce_y_hold))
 793           {
 794              sd->down.by = sd->down.by0 - dy + sd->down.b0y;
 795              y = py;
 796           }
 797         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
 798         sd->pan_func.max_get(sd->pan_obj, &maxx, &maxy);
 799         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 800         if (!sd->bounce_horiz)
 801           {
 802              if (x <= minx) no_bounce_x_end = EINA_TRUE;
 803              if ((x - minx) >= maxx) no_bounce_x_end = EINA_TRUE;
 804           }
 805         if (!sd->bounce_vert)
 806           {
 807              if (y <= miny) no_bounce_y_end = EINA_TRUE;
 808              if ((y - miny) >= maxy) no_bounce_y_end = EINA_TRUE;
 809           }
 810         if ((dt >= 1.0) ||
 811             ((sd->down.bounce_x_hold) && (sd->down.bounce_y_hold)) ||
 812             (no_bounce_x_end && no_bounce_y_end))
 813           {
 814              _smart_anim_stop(sd->smart_obj);
 815              _update_wanted_coordinates(sd, px, py);
 816
 817              sd->down.momentum_animator = NULL;
 818              sd->down.bounce_x_hold = 0;
 819              sd->down.bounce_y_hold = 0;
 820              sd->down.ax = 0;
 821              sd->down.ay = 0;
 822              sd->down.pdx = 0;
 823              sd->down.pdy = 0;
 824              return ECORE_CALLBACK_CANCEL;
 825           }
 826      }
 827    return ECORE_CALLBACK_RENEW;
 828 }
 829
 830 static void
 831 bounce_eval(Smart_Data *sd)
 832 {
 833    Evas_Coord mx, my, px, py, bx, by, b2x, b2y, minx = 0, miny = 0;
 834
 835    if (sd->freeze) return;
 836    if ((!sd->bouncemex) && (!sd->bouncemey)) return;
 837    if (sd->down.now) return; // down bounce while still held down
 838    if (sd->down.onhold_animator)
 839      {
 840         ecore_animator_del(sd->down.onhold_animator);
 841         sd->down.onhold_animator = NULL;
 842      }
 843    if (sd->down.hold_animator)
 844      {
 845         ecore_animator_del(sd->down.hold_animator);
 846         sd->down.hold_animator = NULL;
 847      }
 848    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 849    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 850    sd->pan_func.get(sd->pan_obj, &px, &py);
 851    bx = px;
 852    by = py;
 853    if (px < minx) px = minx;
 854    if ((px - minx) > mx) px = mx + minx;
 855    if (py < miny) py = miny;
 856    if ((py - miny) > my) py = my + miny;
 857    b2x = px;
 858    b2y = py;
 859    if ((!sd->widget) ||
 860        (!elm_widget_drag_child_locked_x_get(sd->widget)))
 861      {
 862         if (!sd->down.bounce_x_animator && !sd->bounce_animator_disabled)
 863           {
 864              if (sd->bouncemex)
 865                {
 866                   if (sd->scrollto.x.animator)
 867                     {
 868                        ecore_animator_del(sd->scrollto.x.animator);
 869                        sd->scrollto.x.animator = NULL;
 870                     }
 871                   sd->down.bounce_x_animator = ecore_animator_add(_smart_bounce_x_animator, sd);
 872                   sd->down.anim_start2 = ecore_loop_time_get();
 873                   sd->down.bx = bx;
 874                   sd->down.bx0 = bx;
 875                   sd->down.b2x = b2x;
 876                   if (sd->down.momentum_animator) sd->down.b0x = sd->down.ax;
 877                   else sd->down.b0x = 0;
 878                }
 879           }
 880      }
 881    if ((!sd->widget) ||
 882        (!elm_widget_drag_child_locked_y_get(sd->widget)))
 883      {
 884         if (!sd->down.bounce_y_animator && !sd->bounce_animator_disabled)
 885           {
 886              if (sd->bouncemey)
 887                {
 888                   if (sd->scrollto.y.animator)
 889                     {
 890                        ecore_animator_del(sd->scrollto.y.animator);
 891                        sd->scrollto.y.animator = NULL;
 892                     }
 893                   sd->down.bounce_y_animator = ecore_animator_add(_smart_bounce_y_animator, sd);
 894                   sd->down.anim_start3 = ecore_loop_time_get();
 895                   sd->down.by = by;
 896                   sd->down.by0 = by;
 897                   sd->down.b2y = b2y;
 898                   if (sd->down.momentum_animator) sd->down.b0y = sd->down.ay;
 899                   else sd->down.b0y = 0;
 900                }
 901           }
 902      }
 903 }
 904
 905 void
 906 elm_smart_scroller_child_pos_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
 907 {
 908    Evas_Coord mx = 0, my = 0, px = 0, py = 0, minx = 0, miny = 0;
 909    double vx, vy;
 910
 911    API_ENTRY return;
 912    // FIXME: allow for bounce outside of range
 913    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
 914    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
 915    if (mx > 0) vx = (double)(x - minx) / (double)mx;
 916    else vx = 0.0;
 917    if (vx < 0.0) vx = 0.0;
 918    else if (vx > 1.0) vx = 1.0;
 919    if (my > 0) vy = (double)(y - miny) / (double)my;
 920    else vy = 0.0;
 921    if (vy < 0.0) vy = 0.0;
 922    else if (vy > 1.0) vy = 1.0;
 923    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, vy);
 924    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", vx, 0.0);
 925    sd->pan_func.get(sd->pan_obj, &px, &py);
 926    if (!_elm_config->thumbscroll_bounce_enable)
 927      {
 928         if (x < minx) x = minx;
 929         if ((x - minx) > mx) x = mx + minx;
 930         if (y < miny) y = miny;
 931         if ((y - miny) > my) y = my + miny;
 932      }
 933
 934    if (!sd->bounce_horiz)
 935      {
 936         if (x < minx) x = minx;
 937         if ((x - minx) > mx) x = mx + minx;
 938      }
 939    if (!sd->bounce_vert)
 940      {
 941         if (y < miny) y = miny;
 942         if (y - miny > my) y = my + miny;
 943      }
 944
 945    sd->pan_func.set(sd->pan_obj, x, y);
 946    if ((px != x) || (py != y))
 947      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
 948    if (!sd->down.bounce_x_animator)
 949      {
 950         if ((x < minx) || (x > (mx + minx)))
 951           {
 952              sd->bouncemex = 1;
 953              bounce_eval(sd);
 954           }
 955      }
 956    if (!sd->down.bounce_y_animator)
 957      {
 958         if ((y < miny) || (y > my + miny))
 959           {
 960              sd->bouncemey = 1;
 961              bounce_eval(sd);
 962           }
 963      }
 964    if ((x != px) || (y != py))
 965      {
 966         evas_object_smart_callback_call(obj, "scroll", NULL);
 967      }
 968    if ((x != px)/* && (!sd->bouncemex)*/)
 969      {
 970         if (x == minx)
 971           evas_object_smart_callback_call(obj, "edge,left", NULL);
 972         if (x == (mx + minx))
 973           evas_object_smart_callback_call(obj, "edge,right", NULL);
 974      }
 975    if ((y != py)/* && (!sd->bouncemey)*/)
 976      {
 977         if (y == miny)
 978           evas_object_smart_callback_call(obj, "edge,top", NULL);
 979         if (y == my + miny)
 980           evas_object_smart_callback_call(obj, "edge,bottom", NULL);
 981      }
 982 }
 983
 984 void
 985 elm_smart_scroller_child_pos_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
 986 {
 987    API_ENTRY return;
 988    sd->pan_func.get(sd->pan_obj, x, y);
 989 }
 990
 991 /* "internal_call" actually toggles whether we should save the coords and do
 992  * extra "speedup" checks, or not. */
 993 static void
 994 _elm_smart_scroller_child_region_show_internal(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h, Eina_Bool internal_call)
 995 {
 996    Evas_Coord mx = 0, my = 0, cw = 0, ch = 0, px = 0, py = 0, nx, ny, minx = 0, miny = 0;
 997
 998    API_ENTRY return;
 999    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
1000    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1001    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
1002    sd->pan_func.get(sd->pan_obj, &px, &py);
1003
1004    nx = px;
1005    if ((x < px) && ((x + w) < (px + (cw - mx)))) nx = x;
1006    else if ((x > px) && ((x + w) > (px + (cw - mx)))) nx = x + w - (cw - mx);
1007    ny = py;
1008    if ((y < py) && ((y + h) < (py + (ch - my)))) ny = y;
1009    else if ((y > py) && ((y + h) > (py + (ch - my)))) ny = y + h - (ch - my);
1010    if (!internal_call)
1011      {
1012         sd->wx = x;
1013         sd->wy = y;
1014         sd->ww = w;
1015         sd->wh = h;
1016         if ((nx == px) && (ny == py)) return;
1017      }
1018
1019    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1020        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1021      {
1022         _smart_anim_stop(sd->smart_obj);
1023      }
1024    if (sd->scrollto.x.animator)
1025      {
1026         ecore_animator_del(sd->scrollto.x.animator);
1027         sd->scrollto.x.animator = NULL;
1028      }
1029    if (sd->scrollto.y.animator)
1030      {
1031         ecore_animator_del(sd->scrollto.y.animator);
1032         sd->scrollto.y.animator = NULL;
1033      }
1034    if (sd->down.bounce_x_animator)
1035      {
1036         ecore_animator_del(sd->down.bounce_x_animator);
1037         sd->down.bounce_x_animator = NULL;
1038         sd->bouncemex = 0;
1039      }
1040    if (sd->down.bounce_y_animator)
1041      {
1042         ecore_animator_del(sd->down.bounce_y_animator);
1043         sd->down.bounce_y_animator = NULL;
1044         sd->bouncemey = 0;
1045      }
1046    if (sd->down.hold_animator)
1047      {
1048         ecore_animator_del(sd->down.hold_animator);
1049         sd->down.hold_animator = NULL;
1050         _smart_drag_stop(sd->smart_obj);
1051      }
1052    if (sd->down.momentum_animator)
1053      {
1054         ecore_animator_del(sd->down.momentum_animator);
1055         sd->down.momentum_animator = NULL;
1056         sd->down.bounce_x_hold = 0;
1057         sd->down.bounce_y_hold = 0;
1058         sd->down.ax = 0;
1059         sd->down.ay = 0;
1060         sd->down.pdx = 0;
1061         sd->down.pdy = 0;
1062      }
1063    x = nx;
1064    if (x < minx) x = minx;
1065    else if ((x + w) > cw) x = cw - w;
1066    y = ny;
1067    if (y < miny) y = miny;
1068    else if ((y + h) > ch) y = ch - h;
1069    elm_smart_scroller_child_pos_set(obj, x, y);
1070 }
1071
1072 /* Set should be used for calculated positions, for example, when we move
1073  * because of an animation or because this is the correct position after
1074  * constraints. */
1075 void
1076 elm_smart_scroller_child_region_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1077 {
1078    _elm_smart_scroller_child_region_show_internal(obj, x, y, w, h, EINA_TRUE);
1079 }
1080
1081 /* Set should be used for setting the wanted position, for example a user scroll
1082  * or moving the cursor in an entry. */
1083 void
1084 elm_smart_scroller_child_region_show(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1085 {
1086    _elm_smart_scroller_child_region_show_internal(obj, x, y, w, h, EINA_FALSE);
1087 }
1088
1089 void
1090 elm_smart_scroller_child_viewport_size_get(Evas_Object *obj, Evas_Coord *w, Evas_Coord *h)
1091 {
1092    API_ENTRY return;
1093    if (!sd->pan_obj) return;
1094    edje_object_calc_force(sd->edje_obj);
1095    evas_object_geometry_get(sd->pan_obj, NULL, NULL, w, h);
1096 }
1097
1098 void
1099 elm_smart_scroller_step_size_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
1100 {
1101    API_ENTRY return;
1102    if (x < 1) x = 1;
1103    if (y < 1) y = 1;
1104    sd->step.x = x;
1105    sd->step.y = y;
1106    _smart_scrollbar_size_adjust(sd);
1107 }
1108
1109 void
1110 elm_smart_scroller_step_size_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1111 {
1112    API_ENTRY return;
1113    if (x) *x = sd->step.x;
1114    if (y) *y = sd->step.y;
1115 }
1116
1117 void
1118 elm_smart_scroller_page_size_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
1119 {
1120    API_ENTRY return;
1121    sd->page.x = x;
1122    sd->page.y = y;
1123    _smart_scrollbar_size_adjust(sd);
1124 }
1125
1126 void
1127 elm_smart_scroller_page_size_get(Evas_Object *obj, Evas_Coord *x, Evas_Coord *y)
1128 {
1129    API_ENTRY return;
1130    if (x) *x = sd->page.x;
1131    if (y) *y = sd->page.y;
1132 }
1133
1134 void
1135 elm_smart_scroller_policy_set(Evas_Object *obj, Elm_Smart_Scroller_Policy hbar, Elm_Smart_Scroller_Policy vbar)
1136 {
1137    API_ENTRY return;
1138    if ((sd->hbar_flags == hbar) && (sd->vbar_flags == vbar)) return;
1139    sd->hbar_flags = hbar;
1140    sd->vbar_flags = vbar;
1141    if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
1142      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,hbar", "elm");
1143    else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
1144      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
1145    else
1146      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,hbar", "elm");
1147    if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
1148      edje_object_signal_emit(sd->edje_obj, "elm,action,show_always,vbar", "elm");
1149    else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
1150      edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
1151    else
1152      edje_object_signal_emit(sd->edje_obj, "elm,action,show_notalways,vbar", "elm");
1153    _smart_scrollbar_size_adjust(sd);
1154 }
1155
1156 void
1157 elm_smart_scroller_policy_get(Evas_Object *obj, Elm_Smart_Scroller_Policy *hbar, Elm_Smart_Scroller_Policy *vbar)
1158 {
1159    API_ENTRY return;
1160    if (hbar) *hbar = sd->hbar_flags;
1161    if (vbar) *vbar = sd->vbar_flags;
1162 }
1163
1164 Evas_Object *
1165 elm_smart_scroller_edje_object_get(Evas_Object *obj)
1166 {
1167    API_ENTRY return NULL;
1168    return sd->edje_obj;
1169 }
1170
1171 void
1172 elm_smart_scroller_single_dir_set(Evas_Object *obj, Eina_Bool single_dir)
1173 {
1174    API_ENTRY return;
1175    sd->one_dir_at_a_time = single_dir;
1176 }
1177
1178 Eina_Bool
1179 elm_smart_scroller_single_dir_get(Evas_Object *obj)
1180 {
1181    API_ENTRY return EINA_FALSE;
1182    return sd->one_dir_at_a_time;
1183 }
1184
1185 void
1186 elm_smart_scroller_object_theme_set(Evas_Object *parent, Evas_Object *obj, const char *clas, const char *group, const char *style)
1187 {
1188    API_ENTRY return;
1189    Evas_Coord mw, mh;
1190    //Does this API require parent object absolutely? if then remove this exception.
1191    double parent_scale = parent ? elm_widget_scale_get(parent) : 1;
1192    _elm_theme_object_set(parent, sd->edje_obj, clas, group, style);
1193    edje_object_scale_set(sd->edje_obj, parent_scale * _elm_config->scale);
1194    if (sd->pan_obj)
1195      edje_object_part_swallow(sd->edje_obj, "elm.swallow.content", sd->pan_obj);
1196    mw = mh = -1;
1197    elm_coords_finger_size_adjust(1, &mw, 1, &mh);
1198    if (edje_object_part_exists(sd->edje_obj, "elm.scrollbar.base"))
1199      {
1200         Evas_Object *base;
1201         base = edje_object_part_swallow_get(sd->edje_obj, "elm.scrollbar.base");
1202         if (!base)
1203           {
1204              base = evas_object_rectangle_add(evas_object_evas_get(sd->edje_obj));
1205              evas_object_color_set(base, 0, 0, 0, 0);
1206              edje_object_part_swallow(sd->edje_obj, "elm.scrollbar.base", base);
1207           }
1208         if (!_elm_config->thumbscroll_enable)
1209            evas_object_size_hint_min_set(base, mw, mh);
1210      }
1211    sd->vbar_visible = !sd->vbar_visible;
1212    sd->hbar_visible = !sd->hbar_visible;
1213    _smart_scrollbar_bar_visibility_adjust(sd);
1214 }
1215
1216 void
1217 elm_smart_scroller_hold_set(Evas_Object *obj, Eina_Bool hold)
1218 {
1219    API_ENTRY return;
1220    sd->hold = hold;
1221 }
1222
1223 void
1224 elm_smart_scroller_freeze_set(Evas_Object *obj, Eina_Bool freeze)
1225 {
1226    API_ENTRY return;
1227    sd->freeze = freeze;
1228    if (sd->freeze)
1229      {
1230         if (sd->down.onhold_animator)
1231           {
1232              ecore_animator_del(sd->down.onhold_animator);
1233              sd->down.onhold_animator = NULL;
1234           }
1235      }
1236    else
1237      bounce_eval(sd);
1238 }
1239
1240 void
1241 elm_smart_scroller_bounce_allow_set(Evas_Object *obj, Eina_Bool horiz, Eina_Bool vert)
1242 {
1243    API_ENTRY return;
1244    sd->bounce_horiz = horiz;
1245    sd->bounce_vert = vert;
1246 }
1247
1248 void
1249 elm_smart_scroller_bounce_allow_get(const Evas_Object *obj, Eina_Bool *horiz, Eina_Bool *vert)
1250 {
1251    API_ENTRY return;
1252    *horiz = sd->bounce_horiz;
1253    *vert = sd->bounce_vert;
1254 }
1255
1256 void
1257 elm_smart_scroller_paging_set(Evas_Object *obj, double pagerel_h, double pagerel_v, Evas_Coord pagesize_h, Evas_Coord pagesize_v)
1258 {
1259    API_ENTRY return;
1260    sd->pagerel_h = pagerel_h;
1261    sd->pagerel_v = pagerel_v;
1262    sd->pagesize_h = pagesize_h;
1263    sd->pagesize_v = pagesize_v;
1264    _smart_page_adjust(sd);
1265 }
1266
1267 void
1268 elm_smart_scroller_paging_get(Evas_Object *obj, double *pagerel_h, double *pagerel_v, Evas_Coord *pagesize_h, Evas_Coord *pagesize_v)
1269 {
1270    API_ENTRY return;
1271    if(pagerel_h) *pagerel_h = sd->pagerel_h;
1272    if(pagerel_v) *pagerel_v = sd->pagerel_v;
1273    if(pagesize_h) *pagesize_h = sd->pagesize_h;
1274    if(pagesize_v) *pagesize_v = sd->pagesize_v;
1275 }
1276
1277 void
1278 elm_smart_scroller_region_bring_in(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1279 {
1280    Evas_Coord mx = 0, my = 0, cw = 0, ch = 0, px = 0, py = 0, nx, ny, minx = 0, miny = 0;
1281
1282    API_ENTRY return;
1283    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
1284    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1285    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
1286    sd->pan_func.get(sd->pan_obj, &px, &py);
1287
1288    nx = px;
1289    if ((x < px) && ((x + w) < (px + (cw - mx)))) nx = x;
1290    else if ((x > px) && ((x + w) > (px + (cw - mx)))) nx = x + w - (cw - mx);
1291    ny = py;
1292    if ((y < py) && ((y + h) < (py + (ch - my)))) ny = y;
1293    else if ((y > py) && ((y + h) > (py + (ch - my)))) ny = y + h - (ch - my);
1294    sd->wx = x;
1295    sd->wy = y;
1296    sd->ww = w;
1297    sd->wh = h;
1298    if ((nx == px) && (ny == py)) return;
1299    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1300        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1301      {
1302         _smart_anim_stop(sd->smart_obj);
1303      }
1304    if (sd->scrollto.x.animator)
1305      {
1306         ecore_animator_del(sd->scrollto.x.animator);
1307         sd->scrollto.x.animator = NULL;
1308      }
1309    if (sd->scrollto.y.animator)
1310      {
1311         ecore_animator_del(sd->scrollto.y.animator);
1312         sd->scrollto.y.animator = NULL;
1313      }
1314    if (sd->down.bounce_x_animator)
1315      {
1316         ecore_animator_del(sd->down.bounce_x_animator);
1317         sd->down.bounce_x_animator = NULL;
1318         sd->bouncemex = 0;
1319      }
1320    if (sd->down.bounce_y_animator)
1321      {
1322         ecore_animator_del(sd->down.bounce_y_animator);
1323         sd->down.bounce_y_animator = NULL;
1324         sd->bouncemey = 0;
1325      }
1326    if (sd->down.hold_animator)
1327      {
1328         ecore_animator_del(sd->down.hold_animator);
1329         sd->down.hold_animator = NULL;
1330         _smart_drag_stop(sd->smart_obj);
1331      }
1332    if (sd->down.momentum_animator)
1333      {
1334         ecore_animator_del(sd->down.momentum_animator);
1335         sd->down.momentum_animator = NULL;
1336         sd->down.bounce_x_hold = 0;
1337         sd->down.bounce_y_hold = 0;
1338         sd->down.ax = 0;
1339         sd->down.ay = 0;
1340         sd->down.pdx = 0;
1341         sd->down.pdy = 0;
1342      }
1343    x = nx;
1344    if (x < minx) x = minx;
1345    else if ((x + w) > cw) x = cw - w;
1346    _smart_scrollto_x(sd, _elm_config->bring_in_scroll_friction, x);
1347    y = ny;
1348    if (y < miny) y = miny;
1349    else if ((y + h) > ch) y = ch - h;
1350    _smart_scrollto_y(sd, _elm_config->bring_in_scroll_friction, y);
1351 }
1352
1353 void
1354 elm_smart_scroller_widget_set(Evas_Object *obj, Evas_Object *wid)
1355 {
1356    API_ENTRY return;
1357    sd->widget = wid;
1358 }
1359
1360 static void
1361 _elm_smart_scroller_wanted_region_set(Evas_Object *obj)
1362 {
1363    INTERNAL_ENTRY;
1364    Evas_Coord ww, wh, wx = sd->wx;
1365
1366    /* Flip to RTL cords only if init in RTL mode */
1367    if(sd->is_mirrored)
1368      wx = _elm_smart_scroller_x_mirrored_get(obj, sd->wx);
1369
1370    if (sd->ww == -1)
1371      {
1372         elm_smart_scroller_child_viewport_size_get(obj, &ww, &wh);
1373      }
1374    else
1375      {
1376         ww = sd->ww;
1377         wh = sd->wh;
1378      }
1379
1380    elm_smart_scroller_child_region_set(obj, wx, sd->wy, ww, wh);
1381 }
1382
1383 /* local subsystem functions */
1384 static void
1385 _smart_edje_drag_v_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1386 {
1387    Smart_Data *sd;
1388
1389    sd = data;
1390    _smart_scrollbar_read(sd);
1391    _smart_drag_start(sd->smart_obj);
1392    sd->freeze = EINA_TRUE;
1393 }
1394
1395 static void
1396 _smart_edje_drag_v_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1397 {
1398    Smart_Data *sd;
1399
1400    sd = data;
1401    _smart_scrollbar_read(sd);
1402    _smart_drag_stop(sd->smart_obj);
1403    sd->freeze = EINA_FALSE;
1404 }
1405
1406 static void
1407 _smart_edje_drag_v(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1408 {
1409    Smart_Data *sd;
1410
1411    sd = data;
1412    _smart_scrollbar_read(sd);
1413 }
1414
1415 static void
1416 _smart_edje_drag_h_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1417 {
1418    Smart_Data *sd;
1419
1420    sd = data;
1421    _smart_scrollbar_read(sd);
1422    _smart_drag_start(sd->smart_obj);
1423    sd->freeze = EINA_TRUE;
1424 }
1425
1426 static void
1427 _smart_edje_drag_h_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1428 {
1429    Smart_Data *sd;
1430
1431    sd = data;
1432    _smart_scrollbar_read(sd);
1433    _smart_drag_stop(sd->smart_obj);
1434    sd->freeze = EINA_FALSE;
1435 }
1436
1437 static void
1438 _smart_edje_drag_h(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1439 {
1440    Smart_Data *sd;
1441
1442    sd = data;
1443    _smart_scrollbar_read(sd);
1444 }
1445
1446 static void
1447 _smart_child_del_hook(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1448 {
1449    Smart_Data *sd;
1450
1451    sd = data;
1452    sd->child_obj = NULL;
1453    _smart_scrollbar_size_adjust(sd);
1454    _smart_scrollbar_reset(sd);
1455 }
1456
1457 static void
1458 _smart_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1459 {
1460    Evas_Coord w, h;
1461    Smart_Data *sd;
1462
1463    sd = data;
1464    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
1465    if ((w != sd->child.w) || (h != sd->child.h))
1466      {
1467         sd->child.w = w;
1468         sd->child.h = h;
1469         _smart_scrollbar_size_adjust(sd);
1470         evas_object_size_hint_min_set(sd->smart_obj, sd->child.w, sd->child.h);
1471         _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1472      }
1473 }
1474
1475 static void
1476 _smart_pan_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1477 {
1478    Smart_Data *sd;
1479
1480    sd = data;
1481    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1482        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1483      {
1484         _smart_anim_stop(sd->smart_obj);
1485      }
1486    if (sd->scrollto.x.animator)
1487      {
1488         ecore_animator_del(sd->scrollto.x.animator);
1489         sd->scrollto.x.animator = NULL;
1490      }
1491    if (sd->scrollto.y.animator)
1492      {
1493         ecore_animator_del(sd->scrollto.y.animator);
1494         sd->scrollto.y.animator = NULL;
1495      }
1496    if (sd->down.bounce_x_animator)
1497      {
1498         ecore_animator_del(sd->down.bounce_x_animator);
1499         sd->down.bounce_x_animator = NULL;
1500         sd->bouncemex = 0;
1501      }
1502    if (sd->down.bounce_y_animator)
1503      {
1504         ecore_animator_del(sd->down.bounce_y_animator);
1505         sd->down.bounce_y_animator = NULL;
1506         sd->bouncemey = 0;
1507      }
1508    _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1509 }
1510
1511 static void
1512 _smart_event_wheel(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1513 {
1514    Evas_Event_Mouse_Wheel *ev;
1515    Smart_Data *sd;
1516    Evas_Coord x = 0, y = 0;
1517
1518    sd = data;
1519    ev = event_info;
1520    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1521    if ((evas_key_modifier_is_set(ev->modifiers, "Control")) ||
1522        (evas_key_modifier_is_set(ev->modifiers, "Alt")) ||
1523        (evas_key_modifier_is_set(ev->modifiers, "Shift")) ||
1524        (evas_key_modifier_is_set(ev->modifiers, "Meta")) ||
1525        (evas_key_modifier_is_set(ev->modifiers, "Hyper")) ||
1526        (evas_key_modifier_is_set(ev->modifiers, "Super")))
1527      return;
1528    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1529    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1530        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1531      {
1532         _smart_anim_stop(sd->smart_obj);
1533      }
1534    if (sd->scrollto.x.animator)
1535      {
1536         ecore_animator_del(sd->scrollto.x.animator);
1537         sd->scrollto.x.animator = NULL;
1538      }
1539    if (sd->scrollto.y.animator)
1540      {
1541         ecore_animator_del(sd->scrollto.y.animator);
1542         sd->scrollto.y.animator = NULL;
1543      }
1544    if (sd->down.bounce_x_animator)
1545      {
1546         ecore_animator_del(sd->down.bounce_x_animator);
1547         sd->down.bounce_x_animator = NULL;
1548         sd->bouncemex = 0;
1549      }
1550    if (sd->down.bounce_y_animator)
1551      {
1552         ecore_animator_del(sd->down.bounce_y_animator);
1553         sd->down.bounce_y_animator = NULL;
1554         sd->bouncemey = 0;
1555      }
1556    if (!ev->direction)
1557      y += ev->z * sd->step.y;
1558    else if (ev->direction == 1)
1559      x += ev->z * sd->step.x;
1560
1561    if ((!sd->hold) && (!sd->freeze))
1562      {
1563         _update_wanted_coordinates(sd, x, y);
1564         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1565      }
1566 }
1567
1568 static void
1569 _smart_event_mouse_down(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1570 {
1571    Evas_Event_Mouse_Down *ev;
1572    Smart_Data *sd;
1573    Evas_Coord x = 0, y = 0;
1574
1575    sd = data;
1576    ev = event_info;
1577 //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1578    if (_elm_config->thumbscroll_enable)
1579      {
1580         sd->down.hold = 0;
1581         if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1582             (sd->down.momentum_animator) || (sd->scrollto.x.animator) ||
1583             (sd->scrollto.y.animator))
1584           {
1585              ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL | EVAS_EVENT_FLAG_ON_HOLD;
1586              sd->down.scroll = 1;
1587              sd->down.hold = 1;
1588              _smart_anim_stop(sd->smart_obj);
1589           }
1590         if (sd->scrollto.x.animator)
1591           {
1592              ecore_animator_del(sd->scrollto.x.animator);
1593              sd->scrollto.x.animator = NULL;
1594           }
1595         if (sd->scrollto.y.animator)
1596           {
1597              ecore_animator_del(sd->scrollto.y.animator);
1598              sd->scrollto.y.animator = NULL;
1599           }
1600         if (sd->down.bounce_x_animator)
1601           {
1602              ecore_animator_del(sd->down.bounce_x_animator);
1603              sd->down.bounce_x_animator = NULL;
1604              sd->bouncemex = 0;
1605           }
1606         if (sd->down.bounce_y_animator)
1607           {
1608              ecore_animator_del(sd->down.bounce_y_animator);
1609              sd->down.bounce_y_animator = NULL;
1610              sd->bouncemey = 0;
1611           }
1612         if (sd->down.hold_animator)
1613           {
1614              ecore_animator_del(sd->down.hold_animator);
1615              sd->down.hold_animator = NULL;
1616              _smart_drag_stop(sd->smart_obj);
1617           }
1618         if (sd->down.momentum_animator)
1619           {
1620              ecore_animator_del(sd->down.momentum_animator);
1621              sd->down.momentum_animator = NULL;
1622              sd->down.bounce_x_hold = 0;
1623              sd->down.bounce_y_hold = 0;
1624              sd->down.ax = 0;
1625              sd->down.ay = 0;
1626           }
1627         if (ev->button == 1)
1628           {
1629              sd->down.now = 1;
1630              sd->down.dragged = 0;
1631              sd->down.dir_x = 0;
1632              sd->down.dir_y = 0;
1633              sd->down.x = ev->canvas.x;
1634              sd->down.y = ev->canvas.y;
1635              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1636              sd->down.sx = x;
1637              sd->down.sy = y;
1638              sd->down.locked = 0;
1639              memset(&(sd->down.history[0]), 0, sizeof(sd->down.history[0]) * 20);
1640 #ifdef EVTIME
1641              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
1642 #else
1643              sd->down.history[0].timestamp = ecore_loop_time_get();
1644 #endif
1645              sd->down.history[0].x = ev->canvas.x;
1646              sd->down.history[0].y = ev->canvas.y;
1647           }
1648         sd->down.dragged_began = 0;
1649         sd->down.hold_parent = 0;
1650         sd->down.cancelled = 0;
1651      }
1652 }
1653
1654 static Eina_Bool
1655 _smart_hold_animator(void *data)
1656 {
1657    Smart_Data *sd = data;
1658    Evas_Coord ox, oy;
1659
1660    elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
1661    if (sd->down.dir_x)
1662      {
1663         if ((!sd->widget) ||
1664             (!elm_widget_drag_child_locked_x_get(sd->widget)))
1665           {
1666              ox = sd->down.hold_x;
1667           }
1668      }
1669    if (sd->down.dir_y)
1670      {
1671         if ((!sd->widget) ||
1672             (!elm_widget_drag_child_locked_y_get(sd->widget)))
1673           {
1674              oy = sd->down.hold_y;
1675           }
1676      }
1677    elm_smart_scroller_child_pos_set(sd->smart_obj, ox, oy);
1678    return ECORE_CALLBACK_RENEW;
1679 }
1680
1681 static Eina_Bool
1682 _smart_event_post_up(void *data, Evas *e __UNUSED__)
1683 {
1684    Smart_Data *sd = data;
1685    if (sd->widget)
1686      {
1687         if (sd->down.dragged)
1688           {
1689              elm_widget_drag_lock_x_set(sd->widget, 0);
1690              elm_widget_drag_lock_y_set(sd->widget, 0);
1691           }
1692      }
1693    return EINA_TRUE;
1694 }
1695
1696 static void
1697 _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
1698 {
1699    Evas_Event_Mouse_Down *ev;
1700    Smart_Data *sd;
1701    Evas_Coord x = 0, y = 0, ox = 0, oy = 0;
1702
1703    sd = data;
1704    ev = event_info;
1705    sd->down.hold_parent = 0;
1706 //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1707    evas_post_event_callback_push(e, _smart_event_post_up, sd);
1708    // FIXME: respect elm_widget_scroll_hold_get of parent container
1709    if (_elm_config->thumbscroll_enable)
1710      {
1711         if (ev->button == 1)
1712           {
1713              if (sd->down.onhold_animator)
1714                {
1715                   ecore_animator_del(sd->down.onhold_animator);
1716                   sd->down.onhold_animator = NULL;
1717                }
1718              x = ev->canvas.x - sd->down.x;
1719              y = ev->canvas.y - sd->down.y;
1720              if (sd->down.dragged)
1721                {
1722                   _smart_drag_stop(sd->smart_obj);
1723                   if ((!sd->hold) && (!sd->freeze))
1724                     {
1725                        double t, at, dt;
1726                        int i;
1727                        Evas_Coord ax, ay, dx, dy, vel;
1728
1729 #ifdef EVTIME
1730                        t = ev->timestamp / 1000.0;
1731 #else
1732                        t = ecore_loop_time_get();
1733 #endif
1734                        ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1735                        ax = ev->canvas.x;
1736                        ay = ev->canvas.y;
1737                        at = 0.0;
1738 #ifdef SCROLLDBG
1739                        printf("------ %i %i\n", ev->canvas.x, ev->canvas.y);
1740 #endif
1741                        for (i = 0; i < 20; i++)
1742                          {
1743                             dt = t - sd->down.history[i].timestamp;
1744                             if (dt > 0.2) break;
1745 #ifdef SCROLLDBG
1746                             printf("H: %i %i @ %1.3f\n",
1747                                    sd->down.history[i].x,
1748                                    sd->down.history[i].y, dt);
1749 #endif
1750                             at += dt;
1751                             ax += sd->down.history[i].x;
1752                             ay += sd->down.history[i].y;
1753                          }
1754                        ax /= (i + 1);
1755                        ay /= (i + 1);
1756                        at /= (i + 1);
1757                        at *= 4.0;
1758                        dx = ev->canvas.x - ax;
1759                        dy = ev->canvas.y - ay;
1760                        if (at > 0)
1761                          {
1762                             vel = sqrt((dx * dx) + (dy * dy)) / at;
1763                             if ((_elm_config->thumbscroll_friction > 0.0) &&
1764                                 (vel > _elm_config->thumbscroll_momentum_threshold))
1765                               {
1766                                  sd->down.dx = ((double)dx / at);
1767                                  sd->down.dy = ((double)dy / at);
1768                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1769                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)))
1770                                    sd->down.dx += (double)sd->down.pdx * 1.5; // FIXME: * 1.5 - probably should be config
1771                                  if (((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1772                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1773                                    sd->down.dy += (double)sd->down.pdy * 1.5; // FIXME: * 1.5 - probably should be config
1774                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1775                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)) ||
1776                                      ((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1777                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1778                                   {
1779                                     double t = ecore_loop_time_get();
1780                                     double dt = t - sd->down.anim_start;
1781
1782                                     if (dt < 0.0) dt = 0.0;
1783                                     else if (dt > _elm_config->thumbscroll_friction)
1784                                       dt = _elm_config->thumbscroll_friction;
1785                                     sd->down.extra_time = _elm_config->thumbscroll_friction - dt;
1786                                   }
1787                                  else
1788                                   sd->down.extra_time = 0.0;
1789                                  sd->down.pdx = sd->down.dx;
1790                                  sd->down.pdy = sd->down.dy;
1791                                  ox = -sd->down.dx;
1792                                  oy = -sd->down.dy;
1793                                  if (!_smart_do_page(sd))
1794                                    {
1795                                       if (!sd->down.momentum_animator && !sd->momentum_animator_disabled)
1796                                         {
1797                                            sd->down.momentum_animator = ecore_animator_add(_smart_momentum_animator, sd);
1798                                            ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1799                                            _smart_anim_start(sd->smart_obj);
1800                                         }
1801                                       sd->down.anim_start = ecore_loop_time_get();
1802                                       elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1803                                       sd->down.sx = x;
1804                                       sd->down.sy = y;
1805                                       sd->down.b0x = 0;
1806                                       sd->down.b0y = 0;
1807                                    }
1808                               }
1809                          }
1810                        if (sd->down.hold_animator)
1811                          {
1812                             ecore_animator_del(sd->down.hold_animator);
1813                             sd->down.hold_animator = NULL;
1814                          }
1815                     }
1816                   else
1817                     {
1818                        sd->down.pdx = 0;
1819                        sd->down.pdy = 0;
1820                     }
1821                   evas_event_feed_hold(e, 0, ev->timestamp, ev->data);
1822                   if (_smart_do_page(sd))
1823                     {
1824                        Evas_Coord pgx, pgy;
1825
1826                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1827                        if ((!sd->widget) ||
1828                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
1829                          {
1830                             pgx = _smart_page_x_get(sd, ox);
1831                             if (pgx != x)
1832                               {
1833                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1834                                  _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
1835                               }
1836                          }
1837                        if ((!sd->widget) ||
1838                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
1839                          {
1840                             pgy = _smart_page_y_get(sd, oy);
1841                             if (pgy != y)
1842                               {
1843                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1844                                  _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
1845                               }
1846                          }
1847                     }
1848                }
1849              else
1850                {
1851                   sd->down.pdx = 0;
1852                   sd->down.pdy = 0;
1853                   if (_smart_do_page(sd))
1854                     {
1855                        Evas_Coord pgx, pgy;
1856
1857                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1858                        if ((!sd->widget) ||
1859                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
1860                          {
1861                             pgx = _smart_page_x_get(sd, ox);
1862                             if (pgx != x) _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
1863                          }
1864                        if ((!sd->widget) ||
1865                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
1866                          {
1867                             pgy = _smart_page_y_get(sd, oy);
1868                             if (pgy != y) _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
1869                          }
1870                     }
1871                   if (sd->down.hold_animator)
1872                     {
1873                        ecore_animator_del(sd->down.hold_animator);
1874                        sd->down.hold_animator = NULL;
1875                     }
1876                }
1877              if (sd->down.scroll)
1878                {
1879                   ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1880                   sd->down.scroll = 0;
1881                }
1882              if (sd->down.hold)
1883                {
1884                   ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1885                   sd->down.hold = 0;
1886                }
1887              sd->down.dragged_began = 0;
1888              sd->down.dir_x = 0;
1889              sd->down.dir_y = 0;
1890              sd->down.want_dragged = 0;
1891              sd->down.dragged = 0;
1892              sd->down.now = 0;
1893              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1894              elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1895              _update_wanted_coordinates(sd, x, y);
1896
1897              if (!_smart_do_page(sd))
1898                bounce_eval(sd);
1899           }
1900      }
1901 }
1902
1903 static Eina_Bool
1904 _smart_onhold_animator(void *data)
1905 {
1906    Smart_Data *sd;
1907    double t, td;
1908    double vx, vy;
1909    Evas_Coord x, y, ox, oy;
1910
1911    sd = data;
1912    t = ecore_loop_time_get();
1913    if (sd->down.onhold_tlast > 0.0)
1914      {
1915         td = t - sd->down.onhold_tlast;
1916         vx = sd->down.onhold_vx * td * (double)_elm_config->thumbscroll_threshold * 2.0;
1917         vy = sd->down.onhold_vy * td * (double)_elm_config->thumbscroll_threshold * 2.0;
1918         elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
1919         x = ox;
1920         y = oy;
1921
1922         if (sd->down.dir_x)
1923           {
1924              if ((!sd->widget) ||
1925                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
1926                {
1927                   sd->down.onhold_vxe += vx;
1928                   x = ox + (int)sd->down.onhold_vxe;
1929                   sd->down.onhold_vxe -= (int)sd->down.onhold_vxe;
1930                }
1931           }
1932
1933         if (sd->down.dir_y)
1934           {
1935              if ((!sd->widget) ||
1936                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
1937                {
1938                   sd->down.onhold_vye += vy;
1939                   y = oy + (int)sd->down.onhold_vye;
1940                   sd->down.onhold_vye -= (int)sd->down.onhold_vye;
1941                }
1942           }
1943
1944         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1945      }
1946    sd->down.onhold_tlast = t;
1947    return ECORE_CALLBACK_RENEW;
1948 }
1949
1950 static Eina_Bool
1951 _smart_event_post_move(void *data, Evas *e __UNUSED__)
1952 {
1953    Smart_Data *sd = data;
1954
1955    if (sd->down.want_dragged)
1956      {
1957         int start = 0;
1958
1959         if (sd->down.hold_parent)
1960           {
1961              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
1962                {
1963                   sd->down.dir_x = 0;
1964                }
1965              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
1966                {
1967                   sd->down.dir_y = 0;
1968                }
1969           }
1970         if (sd->down.dir_x)
1971           {
1972              if ((!sd->widget) ||
1973                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
1974                {
1975                   sd->down.want_dragged = 0;
1976                   sd->down.dragged = 1;
1977                   if (sd->widget)
1978                     {
1979                        elm_widget_drag_lock_x_set(sd->widget, 1);
1980                     }
1981                   start = 1;
1982                }
1983              else
1984                sd->down.dir_x = 0;
1985           }
1986         if (sd->down.dir_y)
1987           {
1988              if ((!sd->widget) ||
1989                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
1990                {
1991                   sd->down.want_dragged = 0;
1992                   sd->down.dragged = 1;
1993                   if (sd->widget)
1994                     {
1995                        elm_widget_drag_lock_y_set(sd->widget, 1);
1996                     }
1997                   start = 1;
1998                }
1999              else
2000                sd->down.dir_y = 0;
2001           }
2002         if ((!sd->down.dir_x) && (!sd->down.dir_y))
2003           {
2004              sd->down.cancelled = 1;
2005           }
2006         if (start) _smart_drag_start(sd->smart_obj);
2007      }
2008    return EINA_TRUE;
2009 }
2010
2011 static void
2012 _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
2013 {
2014    Evas_Event_Mouse_Move *ev;
2015    Smart_Data *sd;
2016    Evas_Coord x = 0, y = 0;
2017
2018    sd = data;
2019    ev = event_info;
2020 //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
2021    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) sd->down.hold_parent = 1;
2022    evas_post_event_callback_push(e, _smart_event_post_move, sd);
2023    // FIXME: respect elm_widget_scroll_hold_get of parent container
2024    if (_elm_config->thumbscroll_enable)
2025      {
2026         if (sd->down.now)
2027           {
2028              int dodir = 0;
2029
2030 #ifdef SCROLLDBG
2031              printf("::: %i %i\n", ev->cur.canvas.x, ev->cur.canvas.y);
2032 #endif
2033              memmove(&(sd->down.history[1]), &(sd->down.history[0]),
2034                      sizeof(sd->down.history[0]) * 19);
2035 #ifdef EVTIME
2036              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
2037 #else
2038              sd->down.history[0].timestamp = ecore_loop_time_get();
2039 #endif
2040              sd->down.history[0].x = ev->cur.canvas.x;
2041              sd->down.history[0].y = ev->cur.canvas.y;
2042
2043              if (!sd->down.dragged_began)
2044                {
2045                   x = ev->cur.canvas.x - sd->down.x;
2046                   y = ev->cur.canvas.y - sd->down.y;
2047
2048                   sd->down.hdir = -1;
2049                   sd->down.vdir = -1;
2050
2051                   if      (x > 0) sd->down.hdir = LEFT;
2052                   else if (x < 0) sd->down.hdir = RIGHT;
2053                   if      (y > 0) sd->down.vdir = UP;
2054                   else if (y < 0) sd->down.vdir = DOWN;
2055
2056                   if (x < 0) x = -x;
2057                   if (y < 0) y = -y;
2058
2059                   if ((sd->one_dir_at_a_time) &&
2060                       (!((sd->down.dir_x) || (sd->down.dir_y))))
2061                     {
2062                        if (x > _elm_config->thumbscroll_threshold)
2063                          {
2064                             if (x > (y * 2))
2065                               {
2066                                  sd->down.dir_x = 1;
2067                                  sd->down.dir_y = 0;
2068                                  dodir++;
2069                               }
2070                          }
2071                        if (y > _elm_config->thumbscroll_threshold)
2072                          {
2073                             if (y > (x * 2))
2074                               {
2075                                  sd->down.dir_x = 0;
2076                                  sd->down.dir_y = 1;
2077                                  dodir++;
2078                               }
2079                          }
2080                        if (!dodir)
2081                          {
2082                             sd->down.dir_x = 1;
2083                             sd->down.dir_y = 1;
2084                          }
2085                     }
2086                   else
2087                     {
2088 //                       can_scroll(sd, LEFT);
2089 //                       can_scroll(sd, RIGHT);
2090 //                       can_scroll(sd, UP);
2091 //                       can_scroll(sd, DOWN);
2092                        sd->down.dir_x = 1;
2093                        sd->down.dir_y = 1;
2094                     }
2095                }
2096              if ((!sd->hold) && (!sd->freeze))
2097                {
2098                   if ((sd->down.dragged) ||
2099                       (((x * x) + (y * y)) >
2100                        (_elm_config->thumbscroll_threshold *
2101                         _elm_config->thumbscroll_threshold)))
2102                     {
2103                        sd->down.dragged_began = 1;
2104                        if (!sd->down.dragged)
2105                          {
2106                             sd->down.want_dragged = 1;
2107                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2108 //                            evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2109 //                            _smart_drag_start(sd->smart_obj);
2110                          }
2111                        if (sd->down.dragged)
2112                          {
2113                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2114                          }
2115 //                       ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2116 //                       sd->down.dragged = 1;
2117                        if (sd->down.dir_x)
2118                          x = sd->down.sx - (ev->cur.canvas.x - sd->down.x);
2119                        else
2120                          x = sd->down.sx;
2121                        if (sd->down.dir_y)
2122                          y = sd->down.sy - (ev->cur.canvas.y - sd->down.y);
2123                        else
2124                          y = sd->down.sy;
2125                        if ((sd->down.dir_x) || (sd->down.dir_y))
2126                          {
2127                             if (!sd->down.locked)
2128                               {
2129                                  sd->down.locked_x = x;
2130                                  sd->down.locked_y = y;
2131                                  sd->down.locked = 1;
2132                               }
2133                             if (!((sd->down.dir_x) && (sd->down.dir_y)))
2134                               {
2135                                  if (sd->down.dir_x) y = sd->down.locked_y;
2136                                  else x = sd->down.locked_x;
2137                               }
2138                          }
2139                        if (_elm_config->thumbscroll_border_friction > 0.0)
2140                          {
2141                             Evas_Coord minx, miny;
2142                             sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2143                             if (y < miny)
2144                                y += (miny - y) *
2145                                   _elm_config->thumbscroll_border_friction;
2146                             else if (sd->child.h <= sd->h)
2147                                y += (sd->down.sy - y) *
2148                                   _elm_config->thumbscroll_border_friction;
2149                             else if ((sd->child.h - sd->h + miny) < y)
2150                                y += (sd->child.h - sd->h + miny - y) *
2151                                   _elm_config->thumbscroll_border_friction;
2152                             if (x < minx)
2153                                x += (minx - x) *
2154                                   _elm_config->thumbscroll_border_friction;
2155                             else if (sd->child.w <= sd->w)
2156                                x += (sd->down.sx - x) *
2157                                   _elm_config->thumbscroll_border_friction;
2158                             else if ((sd->child.w - sd->w + minx) < x)
2159                                x += (sd->child.w - sd->w + minx - x) *
2160                                   _elm_config->thumbscroll_border_friction;
2161                          }
2162
2163                        sd->down.hold_x = x;
2164                        sd->down.hold_y = y;
2165                        if (!sd->down.hold_animator)
2166                          sd->down.hold_animator =
2167                             ecore_animator_add(_smart_hold_animator, sd);
2168 //                       printf("a %i %i\n", sd->down.hold_x, sd->down.hold_y);
2169 //                       _smart_onhold_animator(sd);
2170 //                       elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2171                     }
2172                   else
2173                     {
2174                        if (sd->down.dragged_began)
2175                          {
2176                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2177                             if (!sd->down.hold)
2178                               {
2179                                  sd->down.hold = 1;
2180                                  evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2181                               }
2182                          }
2183                     }
2184                }
2185              else if (!sd->freeze)
2186                {
2187                   Evas_Coord ex, ey, ew, eh;
2188                   double vx = 0.0, vy = 0.0;
2189
2190                   evas_object_geometry_get(sd->event_obj, &ex, &ey, &ew, &eh);
2191                   x = ev->cur.canvas.x - ex;
2192                   y = ev->cur.canvas.y - ey;
2193                   if (x < _elm_config->thumbscroll_threshold)
2194                     {
2195                        if (_elm_config->thumbscroll_threshold > 0.0)
2196                          vx = -(double)(_elm_config->thumbscroll_threshold - x) /
2197                          _elm_config->thumbscroll_threshold;
2198                        else
2199                          vx = -1.0;
2200                     }
2201                   else if (x > (ew - _elm_config->thumbscroll_threshold))
2202                     {
2203                        if (_elm_config->thumbscroll_threshold > 0.0)
2204                          vx = (double)(_elm_config->thumbscroll_threshold - (ew - x)) /
2205                          _elm_config->thumbscroll_threshold;
2206                        else
2207                          vx = 1.0;
2208                     }
2209                   if (y < _elm_config->thumbscroll_threshold)
2210                     {
2211                        if (_elm_config->thumbscroll_threshold > 0.0)
2212                          vy = -(double)(_elm_config->thumbscroll_threshold - y) /
2213                          _elm_config->thumbscroll_threshold;
2214                        else
2215                          vy = -1.0;
2216                     }
2217                   else if (y > (eh - _elm_config->thumbscroll_threshold))
2218                     {
2219                        if (_elm_config->thumbscroll_threshold > 0.0)
2220                          vy = (double)(_elm_config->thumbscroll_threshold - (eh - y)) /
2221                          _elm_config->thumbscroll_threshold;
2222                        else
2223                          vy = 1.0;
2224                     }
2225                   if ((vx != 0.0) || (vy != 0.0))
2226                     {
2227                        sd->down.onhold_vx = vx;
2228                        sd->down.onhold_vy = vy;
2229                        if (!sd->down.onhold_animator)
2230                          {
2231                             sd->down.onhold_vxe = 0.0;
2232                             sd->down.onhold_vye = 0.0;
2233                             sd->down.onhold_tlast = 0.0;
2234                             sd->down.onhold_animator = ecore_animator_add(_smart_onhold_animator, sd);
2235                          }
2236 //                       printf("b %i %i\n", sd->down.hold_x, sd->down.hold_y);
2237                     }
2238                   else
2239                     {
2240                        if (sd->down.onhold_animator)
2241                          {
2242                             ecore_animator_del(sd->down.onhold_animator);
2243                             sd->down.onhold_animator = NULL;
2244                          }
2245                     }
2246                }
2247           }
2248      }
2249 }
2250
2251 static void
2252 _smart_scrollbar_read(Smart_Data *sd)
2253 {
2254    Evas_Coord x, y, mx = 0, my = 0, px, py, minx = 0, miny = 0;
2255    double vx, vy;
2256
2257    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2258    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2259    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2260    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2261    x = vx * (double)mx + minx;
2262    y = vy * (double)my + miny;
2263    sd->pan_func.get(sd->pan_obj, &px, &py);
2264    sd->pan_func.set(sd->pan_obj, x, y);
2265    if ((px != x) || (py != y))
2266      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2267 }
2268
2269 static void
2270 _smart_scrollbar_reset(Smart_Data *sd)
2271 {
2272    Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2273
2274    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2275    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2276    if ((!sd->child_obj) && (!sd->extern_pan))
2277      {
2278         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2279         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2280      }
2281    if (sd->pan_obj)
2282      {
2283         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2284         sd->pan_func.get(sd->pan_obj, &px, &py);
2285         sd->pan_func.set(sd->pan_obj, minx, miny);
2286      }
2287    if ((px != minx) || (py != miny))
2288      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2289 }
2290
2291 static int
2292 _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd)
2293 {
2294    int scroll_v_vis_change = 0;
2295    Evas_Coord h, vw = 0, vh = 0;
2296
2297    h = sd->child.h;
2298    if (sd->pan_obj)
2299      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2300    if (sd->vbar_visible)
2301      {
2302         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2303           {
2304              if ((sd->child_obj) || (sd->extern_pan))
2305                {
2306                   if (h <= vh)
2307                     {
2308                        scroll_v_vis_change = 1;
2309                        sd->vbar_visible = 0;
2310                     }
2311                }
2312              else
2313                {
2314                   scroll_v_vis_change = 1;
2315                   sd->vbar_visible = 0;
2316                }
2317           }
2318         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2319           {
2320              scroll_v_vis_change = 1;
2321              sd->vbar_visible = 0;
2322           }
2323      }
2324    else
2325      {
2326         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2327           {
2328              if ((sd->child_obj) || (sd->extern_pan))
2329                {
2330                   if (h > vh)
2331                     {
2332                        scroll_v_vis_change = 1;
2333                        sd->vbar_visible = 1;
2334                     }
2335                }
2336           }
2337         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2338           {
2339              scroll_v_vis_change = 1;
2340              sd->vbar_visible = 1;
2341           }
2342      }
2343    if (scroll_v_vis_change)
2344      {
2345         if (sd->vbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2346           {
2347              if (sd->vbar_visible)
2348                edje_object_signal_emit(sd->edje_obj, "elm,action,show,vbar", "elm");
2349              else
2350                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2351              edje_object_message_signal_process(sd->edje_obj);
2352              _smart_scrollbar_size_adjust(sd);
2353           }
2354         else
2355           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2356      }
2357    return scroll_v_vis_change;
2358 }
2359
2360 static int
2361 _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd)
2362 {
2363    int scroll_h_vis_change = 0;
2364    Evas_Coord w, vw = 0, vh = 0;
2365
2366    w = sd->child.w;
2367    if (sd->pan_obj)
2368      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2369    if (sd->hbar_visible)
2370      {
2371         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2372           {
2373              if ((sd->child_obj) || (sd->extern_pan))
2374                {
2375                   if (w <= vw)
2376                     {
2377                        scroll_h_vis_change = 1;
2378                        sd->hbar_visible = 0;
2379                     }
2380                }
2381              else
2382                {
2383                   scroll_h_vis_change = 1;
2384                   sd->hbar_visible = 0;
2385                }
2386           }
2387         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2388           {
2389              scroll_h_vis_change = 1;
2390              sd->hbar_visible = 0;
2391           }
2392      }
2393    else
2394      {
2395         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2396           {
2397              if ((sd->child_obj) || (sd->extern_pan))
2398                {
2399                   if (w > vw)
2400                     {
2401                        scroll_h_vis_change = 1;
2402                        sd->hbar_visible = 1;
2403                     }
2404                }
2405           }
2406         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2407           {
2408              scroll_h_vis_change = 1;
2409              sd->hbar_visible = 1;
2410           }
2411      }
2412    if (scroll_h_vis_change)
2413      {
2414         if (sd->hbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2415           {
2416              if (sd->hbar_visible)
2417                edje_object_signal_emit(sd->edje_obj, "elm,action,show,hbar", "elm");
2418              else
2419                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2420              edje_object_message_signal_process(sd->edje_obj);
2421              _smart_scrollbar_size_adjust(sd);
2422           }
2423         else
2424           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2425         _smart_scrollbar_size_adjust(sd);
2426      }
2427    return scroll_h_vis_change;
2428 }
2429
2430 static void
2431 _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd)
2432 {
2433    int changed = 0;
2434
2435    changed |= _smart_scrollbar_bar_h_visibility_adjust(sd);
2436    changed |= _smart_scrollbar_bar_v_visibility_adjust(sd);
2437    if (changed)
2438      {
2439         _smart_scrollbar_bar_h_visibility_adjust(sd);
2440         _smart_scrollbar_bar_v_visibility_adjust(sd);
2441      }
2442 }
2443
2444 static void
2445 _smart_scrollbar_size_adjust(Smart_Data *sd)
2446 {
2447    if ((sd->child_obj) || (sd->extern_pan))
2448      {
2449         Evas_Coord x, y, w, h, mx = 0, my = 0, vw = 0, vh = 0, px, py, minx = 0, miny = 0;
2450         double vx, vy, size;
2451
2452         edje_object_part_geometry_get(sd->edje_obj, "elm.swallow.content",
2453                                       NULL, NULL, &vw, &vh);
2454         w = sd->child.w;
2455         if (w < 1) w = 1;
2456         size = (double)vw / (double)w;
2457         if (size > 1.0)
2458           {
2459              size = 1.0;
2460              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2461           }
2462         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", size, 1.0);
2463
2464         h = sd->child.h;
2465         if (h < 1) h = 1;
2466         size = (double)vh / (double)h;
2467         if (size > 1.0)
2468           {
2469              size = 1.0;
2470              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2471           }
2472         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, size);
2473
2474         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2475         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2476         sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2477         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2478         x = vx * mx + minx;
2479         y = vy * my + miny;
2480
2481         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->step.x / (double)w, 0.0);
2482         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->step.y / (double)h);
2483         if (sd->page.x > 0)
2484           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->page.x / (double)w, 0.0);
2485         else
2486           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", -((double)sd->page.x * ((double)vw / (double)w)) / 100.0, 0.0);
2487         if (sd->page.y > 0)
2488           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->page.y / (double)h);
2489         else
2490           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, -((double)sd->page.y * ((double)vh / (double)h)) / 100.0);
2491
2492         sd->pan_func.get(sd->pan_obj, &px, &py);
2493         if (vx != mx) x = px;
2494         if (vy != my) y = py;
2495         sd->pan_func.set(sd->pan_obj, x, y);
2496 //      if ((px != 0) || (py != 0))
2497 //        edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2498      }
2499    else
2500      {
2501         Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2502
2503         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2504         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2505         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2506         sd->pan_func.get(sd->pan_obj, &px, &py);
2507         sd->pan_func.set(sd->pan_obj, minx, miny);
2508         if ((px != minx) || (py != miny))
2509           edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2510      }
2511    _smart_scrollbar_bar_visibility_adjust(sd);
2512 }
2513
2514 static void
2515 _smart_reconfigure(Smart_Data *sd)
2516 {
2517    evas_object_move(sd->edje_obj, sd->x, sd->y);
2518    evas_object_resize(sd->edje_obj, sd->w, sd->h);
2519    evas_object_move(sd->event_obj, sd->x, sd->y);
2520    evas_object_resize(sd->event_obj, sd->w, sd->h);
2521    _smart_scrollbar_size_adjust(sd);
2522 }
2523
2524 static void
2525 _smart_add(Evas_Object *obj)
2526 {
2527    Smart_Data *sd;
2528    Evas_Object *o;
2529
2530    sd = calloc(1, sizeof(Smart_Data));
2531    if (!sd) return;
2532    evas_object_smart_data_set(obj, sd);
2533
2534    sd->smart_obj = obj;
2535    sd->x = 0;
2536    sd->y = 0;
2537    sd->w = 0;
2538    sd->h = 0;
2539    sd->step.x = 32;
2540    sd->step.y = 32;
2541    sd->page.x = -50;
2542    sd->page.y = -50;
2543    sd->hbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2544    sd->vbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2545    sd->hbar_visible = 1;
2546    sd->vbar_visible = 1;
2547
2548    sd->bounce_horiz = 1;
2549    sd->bounce_vert = 1;
2550
2551    sd->one_dir_at_a_time = 1;
2552    sd->momentum_animator_disabled = 0;
2553    sd->bounce_animator_disabled = 0;
2554
2555    o = edje_object_add(evas_object_evas_get(obj));
2556    evas_object_propagate_events_set(o, 0);
2557    sd->edje_obj = o;
2558    elm_smart_scroller_object_theme_set(NULL, obj, "scroller", "base", "default");
2559    edje_object_signal_callback_add(o, "drag", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2560    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.vbar", _smart_edje_drag_v_start, sd);
2561    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.vbar", _smart_edje_drag_v_stop, sd);
2562    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2563    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2564    edje_object_signal_callback_add(o, "drag", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2565    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.hbar", _smart_edje_drag_h_start, sd);
2566    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.hbar", _smart_edje_drag_h_stop, sd);
2567    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2568    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2569    evas_object_smart_member_add(o, obj);
2570
2571    o = evas_object_rectangle_add(evas_object_evas_get(obj));
2572    sd->event_obj = o;
2573    evas_object_color_set(o, 0, 0, 0, 0);
2574    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
2575    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN, _smart_event_mouse_down, sd);
2576    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_UP, _smart_event_mouse_up, sd);
2577    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_MOVE, _smart_event_mouse_move, sd);
2578    evas_object_smart_member_add(o, obj);
2579    evas_object_repeat_events_set(o, 1);
2580
2581    sd->pan_func.set = _elm_smart_pan_set;
2582    sd->pan_func.get = _elm_smart_pan_get;
2583    sd->pan_func.max_get = _elm_smart_pan_max_get;
2584    sd->pan_func.min_get = _elm_smart_pan_min_get;
2585    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
2586
2587    _smart_scrollbar_reset(sd);
2588 }
2589
2590 static void
2591 _smart_del(Evas_Object *obj)
2592 {
2593    INTERNAL_ENTRY;
2594    elm_smart_scroller_child_set(obj, NULL);
2595    if (!sd->extern_pan) evas_object_del(sd->pan_obj);
2596    evas_object_del(sd->edje_obj);
2597    evas_object_del(sd->event_obj);
2598    if (sd->down.hold_animator) ecore_animator_del(sd->down.hold_animator);
2599    if (sd->down.onhold_animator) ecore_animator_del(sd->down.onhold_animator);
2600    if (sd->down.momentum_animator) ecore_animator_del(sd->down.momentum_animator);
2601    if (sd->down.bounce_x_animator) ecore_animator_del(sd->down.bounce_x_animator);
2602    if (sd->down.bounce_y_animator) ecore_animator_del(sd->down.bounce_y_animator);
2603    if (sd->scrollto.x.animator) ecore_animator_del(sd->scrollto.x.animator);
2604    if (sd->scrollto.y.animator) ecore_animator_del(sd->scrollto.y.animator);
2605    free(sd);
2606    evas_object_smart_data_set(obj, NULL);
2607 }
2608
2609 static void
2610 _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
2611 {
2612    INTERNAL_ENTRY;
2613    sd->x = x;
2614    sd->y = y;
2615    _smart_reconfigure(sd);
2616 }
2617
2618 static void
2619 _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
2620 {
2621    INTERNAL_ENTRY;
2622    sd->w = w;
2623    sd->h = h;
2624    _smart_reconfigure(sd);
2625    _elm_smart_scroller_wanted_region_set(obj);
2626 }
2627
2628 static void
2629 _smart_show(Evas_Object *obj)
2630 {
2631    INTERNAL_ENTRY;
2632    evas_object_show(sd->edje_obj);
2633    evas_object_show(sd->event_obj);
2634 }
2635
2636 static void
2637 _smart_hide(Evas_Object *obj)
2638 {
2639    INTERNAL_ENTRY;
2640    evas_object_hide(sd->edje_obj);
2641    evas_object_hide(sd->event_obj);
2642 }
2643
2644 static void
2645 _smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
2646 {
2647    INTERNAL_ENTRY;
2648    evas_object_color_set(sd->edje_obj, r, g, b, a);
2649 }
2650
2651 static void
2652 _smart_clip_set(Evas_Object *obj, Evas_Object *clip)
2653 {
2654    INTERNAL_ENTRY;
2655    evas_object_clip_set(sd->edje_obj, clip);
2656    evas_object_clip_set(sd->event_obj, clip);
2657 }
2658
2659 static void
2660 _smart_clip_unset(Evas_Object *obj)
2661 {
2662    INTERNAL_ENTRY;
2663    evas_object_clip_unset(sd->edje_obj);
2664    evas_object_clip_unset(sd->event_obj);
2665 }
2666
2667 /* never need to touch this */
2668
2669 static void
2670 _smart_init(void)
2671 {
2672    if (_smart) return;
2673      {
2674         static const Evas_Smart_Class sc =
2675           {
2676              SMART_NAME,
2677                EVAS_SMART_CLASS_VERSION,
2678                _smart_add,
2679                _smart_del,
2680                _smart_move,
2681                _smart_resize,
2682                _smart_show,
2683                _smart_hide,
2684                _smart_color_set,
2685                _smart_clip_set,
2686                _smart_clip_unset,
2687                NULL,
2688                NULL,
2689                NULL,
2690                NULL,
2691                NULL,
2692                NULL,
2693                NULL
2694           };
2695         _smart = evas_smart_class_new(&sc);
2696      }
2697 }
2698