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 }
1237
1238 void
1239 elm_smart_scroller_bounce_allow_set(Evas_Object *obj, Eina_Bool horiz, Eina_Bool vert)
1240 {
1241    API_ENTRY return;
1242    sd->bounce_horiz = horiz;
1243    sd->bounce_vert = vert;
1244 }
1245
1246 void
1247 elm_smart_scroller_bounce_allow_get(const Evas_Object *obj, Eina_Bool *horiz, Eina_Bool *vert)
1248 {
1249    API_ENTRY return;
1250    *horiz = sd->bounce_horiz;
1251    *vert = sd->bounce_vert;
1252 }
1253
1254 void
1255 elm_smart_scroller_paging_set(Evas_Object *obj, double pagerel_h, double pagerel_v, Evas_Coord pagesize_h, Evas_Coord pagesize_v)
1256 {
1257    API_ENTRY return;
1258    sd->pagerel_h = pagerel_h;
1259    sd->pagerel_v = pagerel_v;
1260    sd->pagesize_h = pagesize_h;
1261    sd->pagesize_v = pagesize_v;
1262    _smart_page_adjust(sd);
1263 }
1264
1265 void
1266 elm_smart_scroller_paging_get(Evas_Object *obj, double *pagerel_h, double *pagerel_v, Evas_Coord *pagesize_h, Evas_Coord *pagesize_v)
1267 {
1268    API_ENTRY return;
1269    if(pagerel_h) *pagerel_h = sd->pagerel_h;
1270    if(pagerel_v) *pagerel_v = sd->pagerel_v;
1271    if(pagesize_h) *pagesize_h = sd->pagesize_h;
1272    if(pagesize_v) *pagesize_v = sd->pagesize_v;
1273 }
1274
1275 void
1276 elm_smart_scroller_region_bring_in(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h)
1277 {
1278    Evas_Coord mx = 0, my = 0, cw = 0, ch = 0, px = 0, py = 0, nx, ny, minx = 0, miny = 0;
1279
1280    API_ENTRY return;
1281    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
1282    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
1283    sd->pan_func.child_size_get(sd->pan_obj, &cw, &ch);
1284    sd->pan_func.get(sd->pan_obj, &px, &py);
1285
1286    nx = px;
1287    if ((x < px) && ((x + w) < (px + (cw - mx)))) nx = x;
1288    else if ((x > px) && ((x + w) > (px + (cw - mx)))) nx = x + w - (cw - mx);
1289    ny = py;
1290    if ((y < py) && ((y + h) < (py + (ch - my)))) ny = y;
1291    else if ((y > py) && ((y + h) > (py + (ch - my)))) ny = y + h - (ch - my);
1292    sd->wx = x;
1293    sd->wy = y;
1294    sd->ww = w;
1295    sd->wh = h;
1296    if ((nx == px) && (ny == py)) return;
1297    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1298        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1299      {
1300         _smart_anim_stop(sd->smart_obj);
1301      }
1302    if (sd->scrollto.x.animator)
1303      {
1304         ecore_animator_del(sd->scrollto.x.animator);
1305         sd->scrollto.x.animator = NULL;
1306      }
1307    if (sd->scrollto.y.animator)
1308      {
1309         ecore_animator_del(sd->scrollto.y.animator);
1310         sd->scrollto.y.animator = NULL;
1311      }
1312    if (sd->down.bounce_x_animator)
1313      {
1314         ecore_animator_del(sd->down.bounce_x_animator);
1315         sd->down.bounce_x_animator = NULL;
1316         sd->bouncemex = 0;
1317      }
1318    if (sd->down.bounce_y_animator)
1319      {
1320         ecore_animator_del(sd->down.bounce_y_animator);
1321         sd->down.bounce_y_animator = NULL;
1322         sd->bouncemey = 0;
1323      }
1324    if (sd->down.hold_animator)
1325      {
1326         ecore_animator_del(sd->down.hold_animator);
1327         sd->down.hold_animator = NULL;
1328         _smart_drag_stop(sd->smart_obj);
1329      }
1330    if (sd->down.momentum_animator)
1331      {
1332         ecore_animator_del(sd->down.momentum_animator);
1333         sd->down.momentum_animator = NULL;
1334         sd->down.bounce_x_hold = 0;
1335         sd->down.bounce_y_hold = 0;
1336         sd->down.ax = 0;
1337         sd->down.ay = 0;
1338         sd->down.pdx = 0;
1339         sd->down.pdy = 0;
1340      }
1341    x = nx;
1342    if (x < minx) x = minx;
1343    else if ((x + w) > cw) x = cw - w;
1344    _smart_scrollto_x(sd, _elm_config->bring_in_scroll_friction, x);
1345    y = ny;
1346    if (y < miny) y = miny;
1347    else if ((y + h) > ch) y = ch - h;
1348    _smart_scrollto_y(sd, _elm_config->bring_in_scroll_friction, y);
1349 }
1350
1351 void
1352 elm_smart_scroller_widget_set(Evas_Object *obj, Evas_Object *wid)
1353 {
1354    API_ENTRY return;
1355    sd->widget = wid;
1356 }
1357
1358 static void
1359 _elm_smart_scroller_wanted_region_set(Evas_Object *obj)
1360 {
1361    INTERNAL_ENTRY;
1362    Evas_Coord ww, wh, wx = sd->wx;
1363
1364    /* Flip to RTL cords only if init in RTL mode */
1365    if(sd->is_mirrored)
1366      wx = _elm_smart_scroller_x_mirrored_get(obj, sd->wx);
1367
1368    if (sd->ww == -1)
1369      {
1370         elm_smart_scroller_child_viewport_size_get(obj, &ww, &wh);
1371      }
1372    else
1373      {
1374         ww = sd->ww;
1375         wh = sd->wh;
1376      }
1377
1378    elm_smart_scroller_child_region_set(obj, wx, sd->wy, ww, wh);
1379 }
1380
1381 /* local subsystem functions */
1382 static void
1383 _smart_edje_drag_v_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1384 {
1385    Smart_Data *sd;
1386
1387    sd = data;
1388    _smart_scrollbar_read(sd);
1389    _smart_drag_start(sd->smart_obj);
1390    sd->freeze = EINA_TRUE;
1391 }
1392
1393 static void
1394 _smart_edje_drag_v_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1395 {
1396    Smart_Data *sd;
1397
1398    sd = data;
1399    _smart_scrollbar_read(sd);
1400    _smart_drag_stop(sd->smart_obj);
1401    sd->freeze = EINA_FALSE;
1402 }
1403
1404 static void
1405 _smart_edje_drag_v(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1406 {
1407    Smart_Data *sd;
1408
1409    sd = data;
1410    _smart_scrollbar_read(sd);
1411 }
1412
1413 static void
1414 _smart_edje_drag_h_start(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1415 {
1416    Smart_Data *sd;
1417
1418    sd = data;
1419    _smart_scrollbar_read(sd);
1420    _smart_drag_start(sd->smart_obj);
1421    sd->freeze = EINA_TRUE;
1422 }
1423
1424 static void
1425 _smart_edje_drag_h_stop(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1426 {
1427    Smart_Data *sd;
1428
1429    sd = data;
1430    _smart_scrollbar_read(sd);
1431    _smart_drag_stop(sd->smart_obj);
1432    sd->freeze = EINA_FALSE;
1433 }
1434
1435 static void
1436 _smart_edje_drag_h(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
1437 {
1438    Smart_Data *sd;
1439
1440    sd = data;
1441    _smart_scrollbar_read(sd);
1442 }
1443
1444 static void
1445 _smart_child_del_hook(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1446 {
1447    Smart_Data *sd;
1448
1449    sd = data;
1450    sd->child_obj = NULL;
1451    _smart_scrollbar_size_adjust(sd);
1452    _smart_scrollbar_reset(sd);
1453 }
1454
1455 static void
1456 _smart_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1457 {
1458    Evas_Coord w, h;
1459    Smart_Data *sd;
1460
1461    sd = data;
1462    sd->pan_func.child_size_get(sd->pan_obj, &w, &h);
1463    if ((w != sd->child.w) || (h != sd->child.h))
1464      {
1465         sd->child.w = w;
1466         sd->child.h = h;
1467         _smart_scrollbar_size_adjust(sd);
1468         evas_object_size_hint_min_set(sd->smart_obj, sd->child.w, sd->child.h);
1469         _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1470      }
1471 }
1472
1473 static void
1474 _smart_pan_pan_changed_hook(void *data, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
1475 {
1476    Smart_Data *sd;
1477
1478    sd = data;
1479    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1480        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1481      {
1482         _smart_anim_stop(sd->smart_obj);
1483      }
1484    if (sd->scrollto.x.animator)
1485      {
1486         ecore_animator_del(sd->scrollto.x.animator);
1487         sd->scrollto.x.animator = NULL;
1488      }
1489    if (sd->scrollto.y.animator)
1490      {
1491         ecore_animator_del(sd->scrollto.y.animator);
1492         sd->scrollto.y.animator = NULL;
1493      }
1494    if (sd->down.bounce_x_animator)
1495      {
1496         ecore_animator_del(sd->down.bounce_x_animator);
1497         sd->down.bounce_x_animator = NULL;
1498         sd->bouncemex = 0;
1499      }
1500    if (sd->down.bounce_y_animator)
1501      {
1502         ecore_animator_del(sd->down.bounce_y_animator);
1503         sd->down.bounce_y_animator = NULL;
1504         sd->bouncemey = 0;
1505      }
1506    _elm_smart_scroller_wanted_region_set(sd->smart_obj);
1507 }
1508
1509 static void
1510 _smart_event_wheel(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1511 {
1512    Evas_Event_Mouse_Wheel *ev;
1513    Smart_Data *sd;
1514    Evas_Coord x = 0, y = 0;
1515
1516    sd = data;
1517    ev = event_info;
1518    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1519    if ((evas_key_modifier_is_set(ev->modifiers, "Control")) ||
1520        (evas_key_modifier_is_set(ev->modifiers, "Alt")) ||
1521        (evas_key_modifier_is_set(ev->modifiers, "Shift")) ||
1522        (evas_key_modifier_is_set(ev->modifiers, "Meta")) ||
1523        (evas_key_modifier_is_set(ev->modifiers, "Hyper")) ||
1524        (evas_key_modifier_is_set(ev->modifiers, "Super")))
1525      return;
1526    elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1527    if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1528        (sd->scrollto.x.animator) || (sd->scrollto.y.animator))
1529      {
1530         _smart_anim_stop(sd->smart_obj);
1531      }
1532    if (sd->scrollto.x.animator)
1533      {
1534         ecore_animator_del(sd->scrollto.x.animator);
1535         sd->scrollto.x.animator = NULL;
1536      }
1537    if (sd->scrollto.y.animator)
1538      {
1539         ecore_animator_del(sd->scrollto.y.animator);
1540         sd->scrollto.y.animator = NULL;
1541      }
1542    if (sd->down.bounce_x_animator)
1543      {
1544         ecore_animator_del(sd->down.bounce_x_animator);
1545         sd->down.bounce_x_animator = NULL;
1546         sd->bouncemex = 0;
1547      }
1548    if (sd->down.bounce_y_animator)
1549      {
1550         ecore_animator_del(sd->down.bounce_y_animator);
1551         sd->down.bounce_y_animator = NULL;
1552         sd->bouncemey = 0;
1553      }
1554    if (!ev->direction)
1555      y += ev->z * sd->step.y;
1556    else if (ev->direction == 1)
1557      x += ev->z * sd->step.x;
1558
1559    if ((!sd->hold) && (!sd->freeze))
1560      {
1561         _update_wanted_coordinates(sd, x, y);
1562         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1563      }
1564 }
1565
1566 static void
1567 _smart_event_mouse_down(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info)
1568 {
1569    Evas_Event_Mouse_Down *ev;
1570    Smart_Data *sd;
1571    Evas_Coord x = 0, y = 0;
1572
1573    sd = data;
1574    ev = event_info;
1575 //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1576    if (_elm_config->thumbscroll_enable)
1577      {
1578         sd->down.hold = 0;
1579         if ((sd->down.bounce_x_animator) || (sd->down.bounce_y_animator) ||
1580             (sd->down.momentum_animator) || (sd->scrollto.x.animator) ||
1581             (sd->scrollto.y.animator))
1582           {
1583              ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL | EVAS_EVENT_FLAG_ON_HOLD;
1584              sd->down.scroll = 1;
1585              sd->down.hold = 1;
1586              _smart_anim_stop(sd->smart_obj);
1587           }
1588         if (sd->scrollto.x.animator)
1589           {
1590              ecore_animator_del(sd->scrollto.x.animator);
1591              sd->scrollto.x.animator = NULL;
1592           }
1593         if (sd->scrollto.y.animator)
1594           {
1595              ecore_animator_del(sd->scrollto.y.animator);
1596              sd->scrollto.y.animator = NULL;
1597           }
1598         if (sd->down.bounce_x_animator)
1599           {
1600              ecore_animator_del(sd->down.bounce_x_animator);
1601              sd->down.bounce_x_animator = NULL;
1602              sd->bouncemex = 0;
1603           }
1604         if (sd->down.bounce_y_animator)
1605           {
1606              ecore_animator_del(sd->down.bounce_y_animator);
1607              sd->down.bounce_y_animator = NULL;
1608              sd->bouncemey = 0;
1609           }
1610         if (sd->down.hold_animator)
1611           {
1612              ecore_animator_del(sd->down.hold_animator);
1613              sd->down.hold_animator = NULL;
1614              _smart_drag_stop(sd->smart_obj);
1615           }
1616         if (sd->down.momentum_animator)
1617           {
1618              ecore_animator_del(sd->down.momentum_animator);
1619              sd->down.momentum_animator = NULL;
1620              sd->down.bounce_x_hold = 0;
1621              sd->down.bounce_y_hold = 0;
1622              sd->down.ax = 0;
1623              sd->down.ay = 0;
1624           }
1625         if (ev->button == 1)
1626           {
1627              sd->down.now = 1;
1628              sd->down.dragged = 0;
1629              sd->down.dir_x = 0;
1630              sd->down.dir_y = 0;
1631              sd->down.x = ev->canvas.x;
1632              sd->down.y = ev->canvas.y;
1633              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1634              sd->down.sx = x;
1635              sd->down.sy = y;
1636              sd->down.locked = 0;
1637              memset(&(sd->down.history[0]), 0, sizeof(sd->down.history[0]) * 20);
1638 #ifdef EVTIME
1639              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
1640 #else
1641              sd->down.history[0].timestamp = ecore_loop_time_get();
1642 #endif
1643              sd->down.history[0].x = ev->canvas.x;
1644              sd->down.history[0].y = ev->canvas.y;
1645           }
1646         sd->down.dragged_began = 0;
1647         sd->down.hold_parent = 0;
1648         sd->down.cancelled = 0;
1649      }
1650 }
1651
1652 static Eina_Bool
1653 _smart_hold_animator(void *data)
1654 {
1655    Smart_Data *sd = data;
1656    Evas_Coord ox, oy;
1657
1658    elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
1659    if (sd->down.dir_x)
1660      {
1661         if ((!sd->widget) ||
1662             (!elm_widget_drag_child_locked_x_get(sd->widget)))
1663           {
1664              ox = sd->down.hold_x;
1665           }
1666      }
1667    if (sd->down.dir_y)
1668      {
1669         if ((!sd->widget) ||
1670             (!elm_widget_drag_child_locked_y_get(sd->widget)))
1671           {
1672              oy = sd->down.hold_y;
1673           }
1674      }
1675    elm_smart_scroller_child_pos_set(sd->smart_obj, ox, oy);
1676    return ECORE_CALLBACK_RENEW;
1677 }
1678
1679 static Eina_Bool
1680 _smart_event_post_up(void *data, Evas *e __UNUSED__)
1681 {
1682    Smart_Data *sd = data;
1683    if (sd->widget)
1684      {
1685         if (sd->down.dragged)
1686           {
1687              elm_widget_drag_lock_x_set(sd->widget, 0);
1688              elm_widget_drag_lock_y_set(sd->widget, 0);
1689           }
1690      }
1691    return EINA_TRUE;
1692 }
1693
1694 static void
1695 _smart_event_mouse_up(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
1696 {
1697    Evas_Event_Mouse_Down *ev;
1698    Smart_Data *sd;
1699    Evas_Coord x = 0, y = 0, ox = 0, oy = 0;
1700
1701    sd = data;
1702    ev = event_info;
1703    sd->down.hold_parent = 0;
1704 //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
1705    evas_post_event_callback_push(e, _smart_event_post_up, sd);
1706    // FIXME: respect elm_widget_scroll_hold_get of parent container
1707    if (_elm_config->thumbscroll_enable)
1708      {
1709         if (ev->button == 1)
1710           {
1711              if (sd->down.onhold_animator)
1712                {
1713                   ecore_animator_del(sd->down.onhold_animator);
1714                   sd->down.onhold_animator = NULL;
1715                }
1716              x = ev->canvas.x - sd->down.x;
1717              y = ev->canvas.y - sd->down.y;
1718              if (sd->down.dragged)
1719                {
1720                   _smart_drag_stop(sd->smart_obj);
1721                   if ((!sd->hold) && (!sd->freeze))
1722                     {
1723                        double t, at, dt;
1724                        int i;
1725                        Evas_Coord ax, ay, dx, dy, vel;
1726
1727 #ifdef EVTIME
1728                        t = ev->timestamp / 1000.0;
1729 #else
1730                        t = ecore_loop_time_get();
1731 #endif
1732                        ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1733                        ax = ev->canvas.x;
1734                        ay = ev->canvas.y;
1735                        at = 0.0;
1736 #ifdef SCROLLDBG
1737                        printf("------ %i %i\n", ev->canvas.x, ev->canvas.y);
1738 #endif
1739                        for (i = 0; i < 20; i++)
1740                          {
1741                             dt = t - sd->down.history[i].timestamp;
1742                             if (dt > 0.2) break;
1743 #ifdef SCROLLDBG
1744                             printf("H: %i %i @ %1.3f\n",
1745                                    sd->down.history[i].x,
1746                                    sd->down.history[i].y, dt);
1747 #endif
1748                             at += dt;
1749                             ax += sd->down.history[i].x;
1750                             ay += sd->down.history[i].y;
1751                          }
1752                        ax /= (i + 1);
1753                        ay /= (i + 1);
1754                        at /= (i + 1);
1755                        at *= 4.0;
1756                        dx = ev->canvas.x - ax;
1757                        dy = ev->canvas.y - ay;
1758                        if (at > 0)
1759                          {
1760                             vel = sqrt((dx * dx) + (dy * dy)) / at;
1761                             if ((_elm_config->thumbscroll_friction > 0.0) &&
1762                                 (vel > _elm_config->thumbscroll_momentum_threshold) &&
1763                                 (!sd->freeze))
1764                               {
1765                                  sd->down.dx = ((double)dx / at);
1766                                  sd->down.dy = ((double)dy / at);
1767                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1768                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)))
1769                                    sd->down.dx += (double)sd->down.pdx * 1.5; // FIXME: * 1.5 - probably should be config
1770                                  if (((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1771                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1772                                    sd->down.dy += (double)sd->down.pdy * 1.5; // FIXME: * 1.5 - probably should be config
1773                                  if (((sd->down.dx > 0) && (sd->down.pdx > 0)) ||
1774                                      ((sd->down.dx < 0) && (sd->down.pdx < 0)) ||
1775                                      ((sd->down.dy > 0) && (sd->down.pdy > 0)) ||
1776                                      ((sd->down.dy < 0) && (sd->down.pdy < 0)))
1777                                   {
1778                                     double t = ecore_loop_time_get();
1779                                     double dt = t - sd->down.anim_start;
1780
1781                                     if (dt < 0.0) dt = 0.0;
1782                                     else if (dt > _elm_config->thumbscroll_friction)
1783                                       dt = _elm_config->thumbscroll_friction;
1784                                     sd->down.extra_time = _elm_config->thumbscroll_friction - dt;
1785                                   }
1786                                  else
1787                                   sd->down.extra_time = 0.0;
1788                                  sd->down.pdx = sd->down.dx;
1789                                  sd->down.pdy = sd->down.dy;
1790                                  ox = -sd->down.dx;
1791                                  oy = -sd->down.dy;
1792                                  if (!_smart_do_page(sd))
1793                                    {
1794                                       if (!sd->down.momentum_animator && !sd->momentum_animator_disabled)
1795                                         {
1796                                            sd->down.momentum_animator = ecore_animator_add(_smart_momentum_animator, sd);
1797                                            ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1798                                            _smart_anim_start(sd->smart_obj);
1799                                         }
1800                                       sd->down.anim_start = ecore_loop_time_get();
1801                                       elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1802                                       sd->down.sx = x;
1803                                       sd->down.sy = y;
1804                                       sd->down.b0x = 0;
1805                                       sd->down.b0y = 0;
1806                                    }
1807                               }
1808                          }
1809                        if (sd->down.hold_animator)
1810                          {
1811                             ecore_animator_del(sd->down.hold_animator);
1812                             sd->down.hold_animator = NULL;
1813                          }
1814                     }
1815                   else
1816                     {
1817                        sd->down.pdx = 0;
1818                        sd->down.pdy = 0;
1819                     }
1820                   evas_event_feed_hold(e, 0, ev->timestamp, ev->data);
1821                   if (_smart_do_page(sd))
1822                     {
1823                        Evas_Coord pgx, pgy;
1824
1825                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1826                        if ((!sd->widget) ||
1827                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
1828                          {
1829                             pgx = _smart_page_x_get(sd, ox);
1830                             if (pgx != x)
1831                               {
1832                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1833                                  _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
1834                               }
1835                          }
1836                        if ((!sd->widget) ||
1837                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
1838                          {
1839                             pgy = _smart_page_y_get(sd, oy);
1840                             if (pgy != y)
1841                               {
1842                                  ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1843                                  _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
1844                               }
1845                          }
1846                     }
1847                }
1848              else
1849                {
1850                   sd->down.pdx = 0;
1851                   sd->down.pdy = 0;
1852                   if (_smart_do_page(sd))
1853                     {
1854                        Evas_Coord pgx, pgy;
1855
1856                        elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1857                        if ((!sd->widget) ||
1858                            (!elm_widget_drag_child_locked_x_get(sd->widget)))
1859                          {
1860                             pgx = _smart_page_x_get(sd, ox);
1861                             if (pgx != x) _smart_scrollto_x(sd, _elm_config->page_scroll_friction, pgx);
1862                          }
1863                        if ((!sd->widget) ||
1864                            (!elm_widget_drag_child_locked_y_get(sd->widget)))
1865                          {
1866                             pgy = _smart_page_y_get(sd, oy);
1867                             if (pgy != y) _smart_scrollto_y(sd, _elm_config->page_scroll_friction, pgy);
1868                          }
1869                     }
1870                   if (sd->down.hold_animator)
1871                     {
1872                        ecore_animator_del(sd->down.hold_animator);
1873                        sd->down.hold_animator = NULL;
1874                     }
1875                }
1876              if (sd->down.scroll)
1877                {
1878                   ev->event_flags |= EVAS_EVENT_FLAG_ON_SCROLL;
1879                   sd->down.scroll = 0;
1880                }
1881              if (sd->down.hold)
1882                {
1883                   ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
1884                   sd->down.hold = 0;
1885                }
1886              sd->down.dragged_began = 0;
1887              sd->down.dir_x = 0;
1888              sd->down.dir_y = 0;
1889              sd->down.want_dragged = 0;
1890              sd->down.dragged = 0;
1891              sd->down.now = 0;
1892              elm_smart_scroller_child_pos_get(sd->smart_obj, &x, &y);
1893              elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1894              _update_wanted_coordinates(sd, x, y);
1895
1896              if (!_smart_do_page(sd))
1897                bounce_eval(sd);
1898           }
1899      }
1900 }
1901
1902 static Eina_Bool
1903 _smart_onhold_animator(void *data)
1904 {
1905    Smart_Data *sd;
1906    double t, td;
1907    double vx, vy;
1908    Evas_Coord x, y, ox, oy;
1909
1910    sd = data;
1911    t = ecore_loop_time_get();
1912    if (sd->down.onhold_tlast > 0.0)
1913      {
1914         td = t - sd->down.onhold_tlast;
1915         vx = sd->down.onhold_vx * td * (double)_elm_config->thumbscroll_threshold * 2.0;
1916         vy = sd->down.onhold_vy * td * (double)_elm_config->thumbscroll_threshold * 2.0;
1917         elm_smart_scroller_child_pos_get(sd->smart_obj, &ox, &oy);
1918         x = ox;
1919         y = oy;
1920
1921         if (sd->down.dir_x)
1922           {
1923              if ((!sd->widget) ||
1924                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
1925                {
1926                   sd->down.onhold_vxe += vx;
1927                   x = ox + (int)sd->down.onhold_vxe;
1928                   sd->down.onhold_vxe -= (int)sd->down.onhold_vxe;
1929                }
1930           }
1931
1932         if (sd->down.dir_y)
1933           {
1934              if ((!sd->widget) ||
1935                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
1936                {
1937                   sd->down.onhold_vye += vy;
1938                   y = oy + (int)sd->down.onhold_vye;
1939                   sd->down.onhold_vye -= (int)sd->down.onhold_vye;
1940                }
1941           }
1942
1943         elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
1944      }
1945    sd->down.onhold_tlast = t;
1946    return ECORE_CALLBACK_RENEW;
1947 }
1948
1949 static Eina_Bool
1950 _smart_event_post_move(void *data, Evas *e __UNUSED__)
1951 {
1952    Smart_Data *sd = data;
1953
1954    if (sd->down.want_dragged)
1955      {
1956         int start = 0;
1957
1958         if (sd->down.hold_parent)
1959           {
1960              if ((sd->down.dir_x) && !can_scroll(sd, sd->down.hdir))
1961                {
1962                   sd->down.dir_x = 0;
1963                }
1964              if ((sd->down.dir_y) && !can_scroll(sd, sd->down.vdir))
1965                {
1966                   sd->down.dir_y = 0;
1967                }
1968           }
1969         if (sd->down.dir_x)
1970           {
1971              if ((!sd->widget) ||
1972                  (!elm_widget_drag_child_locked_x_get(sd->widget)))
1973                {
1974                   sd->down.want_dragged = 0;
1975                   sd->down.dragged = 1;
1976                   if (sd->widget)
1977                     {
1978                        elm_widget_drag_lock_x_set(sd->widget, 1);
1979                     }
1980                   start = 1;
1981                }
1982              else
1983                sd->down.dir_x = 0;
1984           }
1985         if (sd->down.dir_y)
1986           {
1987              if ((!sd->widget) ||
1988                  (!elm_widget_drag_child_locked_y_get(sd->widget)))
1989                {
1990                   sd->down.want_dragged = 0;
1991                   sd->down.dragged = 1;
1992                   if (sd->widget)
1993                     {
1994                        elm_widget_drag_lock_y_set(sd->widget, 1);
1995                     }
1996                   start = 1;
1997                }
1998              else
1999                sd->down.dir_y = 0;
2000           }
2001         if ((!sd->down.dir_x) && (!sd->down.dir_y))
2002           {
2003              sd->down.cancelled = 1;
2004           }
2005         if (start) _smart_drag_start(sd->smart_obj);
2006      }
2007    return EINA_TRUE;
2008 }
2009
2010 static void
2011 _smart_event_mouse_move(void *data, Evas *e, Evas_Object *obj __UNUSED__, void *event_info)
2012 {
2013    Evas_Event_Mouse_Move *ev;
2014    Smart_Data *sd;
2015    Evas_Coord x = 0, y = 0;
2016
2017    sd = data;
2018    ev = event_info;
2019 //   if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) return ;
2020    if (ev->event_flags & EVAS_EVENT_FLAG_ON_HOLD) sd->down.hold_parent = 1;
2021    evas_post_event_callback_push(e, _smart_event_post_move, sd);
2022    // FIXME: respect elm_widget_scroll_hold_get of parent container
2023    if (_elm_config->thumbscroll_enable)
2024      {
2025         if (sd->down.now)
2026           {
2027              int dodir = 0;
2028
2029 #ifdef SCROLLDBG
2030              printf("::: %i %i\n", ev->cur.canvas.x, ev->cur.canvas.y);
2031 #endif
2032              memmove(&(sd->down.history[1]), &(sd->down.history[0]),
2033                      sizeof(sd->down.history[0]) * 19);
2034 #ifdef EVTIME
2035              sd->down.history[0].timestamp = ev->timestamp / 1000.0;
2036 #else
2037              sd->down.history[0].timestamp = ecore_loop_time_get();
2038 #endif
2039              sd->down.history[0].x = ev->cur.canvas.x;
2040              sd->down.history[0].y = ev->cur.canvas.y;
2041
2042              if (!sd->down.dragged_began)
2043                {
2044                   x = ev->cur.canvas.x - sd->down.x;
2045                   y = ev->cur.canvas.y - sd->down.y;
2046
2047                   sd->down.hdir = -1;
2048                   sd->down.vdir = -1;
2049
2050                   if      (x > 0) sd->down.hdir = LEFT;
2051                   else if (x < 0) sd->down.hdir = RIGHT;
2052                   if      (y > 0) sd->down.vdir = UP;
2053                   else if (y < 0) sd->down.vdir = DOWN;
2054
2055                   if (x < 0) x = -x;
2056                   if (y < 0) y = -y;
2057
2058                   if ((sd->one_dir_at_a_time) &&
2059                       (!((sd->down.dir_x) || (sd->down.dir_y))))
2060                     {
2061                        if (x > _elm_config->thumbscroll_threshold)
2062                          {
2063                             if (x > (y * 2))
2064                               {
2065                                  sd->down.dir_x = 1;
2066                                  sd->down.dir_y = 0;
2067                                  dodir++;
2068                               }
2069                          }
2070                        if (y > _elm_config->thumbscroll_threshold)
2071                          {
2072                             if (y > (x * 2))
2073                               {
2074                                  sd->down.dir_x = 0;
2075                                  sd->down.dir_y = 1;
2076                                  dodir++;
2077                               }
2078                          }
2079                        if (!dodir)
2080                          {
2081                             sd->down.dir_x = 1;
2082                             sd->down.dir_y = 1;
2083                          }
2084                     }
2085                   else
2086                     {
2087 //                       can_scroll(sd, LEFT);
2088 //                       can_scroll(sd, RIGHT);
2089 //                       can_scroll(sd, UP);
2090 //                       can_scroll(sd, DOWN);
2091                        sd->down.dir_x = 1;
2092                        sd->down.dir_y = 1;
2093                     }
2094                }
2095              if ((!sd->hold) && (!sd->freeze))
2096                {
2097                   if ((sd->down.dragged) ||
2098                       (((x * x) + (y * y)) >
2099                        (_elm_config->thumbscroll_threshold *
2100                         _elm_config->thumbscroll_threshold)))
2101                     {
2102                        sd->down.dragged_began = 1;
2103                        if (!sd->down.dragged)
2104                          {
2105                             sd->down.want_dragged = 1;
2106                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2107 //                            evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2108 //                            _smart_drag_start(sd->smart_obj);
2109                          }
2110                        if (sd->down.dragged)
2111                          {
2112                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2113                          }
2114 //                       ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2115 //                       sd->down.dragged = 1;
2116                        if (sd->down.dir_x)
2117                          x = sd->down.sx - (ev->cur.canvas.x - sd->down.x);
2118                        else
2119                          x = sd->down.sx;
2120                        if (sd->down.dir_y)
2121                          y = sd->down.sy - (ev->cur.canvas.y - sd->down.y);
2122                        else
2123                          y = sd->down.sy;
2124                        if ((sd->down.dir_x) || (sd->down.dir_y))
2125                          {
2126                             if (!sd->down.locked)
2127                               {
2128                                  sd->down.locked_x = x;
2129                                  sd->down.locked_y = y;
2130                                  sd->down.locked = 1;
2131                               }
2132                             if (!((sd->down.dir_x) && (sd->down.dir_y)))
2133                               {
2134                                  if (sd->down.dir_x) y = sd->down.locked_y;
2135                                  else x = sd->down.locked_x;
2136                               }
2137                          }
2138                        if (_elm_config->thumbscroll_border_friction > 0.0)
2139                          {
2140                             Evas_Coord minx, miny;
2141                             sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2142                             if (y < miny)
2143                                y += (miny - y) *
2144                                   _elm_config->thumbscroll_border_friction;
2145                             else if (sd->child.h <= sd->h)
2146                                y += (sd->down.sy - y) *
2147                                   _elm_config->thumbscroll_border_friction;
2148                             else if ((sd->child.h - sd->h + miny) < y)
2149                                y += (sd->child.h - sd->h + miny - y) *
2150                                   _elm_config->thumbscroll_border_friction;
2151                             if (x < minx)
2152                                x += (minx - x) *
2153                                   _elm_config->thumbscroll_border_friction;
2154                             else if (sd->child.w <= sd->w)
2155                                x += (sd->down.sx - x) *
2156                                   _elm_config->thumbscroll_border_friction;
2157                             else if ((sd->child.w - sd->w + minx) < x)
2158                                x += (sd->child.w - sd->w + minx - x) *
2159                                   _elm_config->thumbscroll_border_friction;
2160                          }
2161
2162                        sd->down.hold_x = x;
2163                        sd->down.hold_y = y;
2164                        if (!sd->down.hold_animator)
2165                          sd->down.hold_animator =
2166                             ecore_animator_add(_smart_hold_animator, sd);
2167 //                       printf("a %i %i\n", sd->down.hold_x, sd->down.hold_y);
2168 //                       _smart_onhold_animator(sd);
2169 //                       elm_smart_scroller_child_pos_set(sd->smart_obj, x, y);
2170                     }
2171                   else
2172                     {
2173                        if (sd->down.dragged_began)
2174                          {
2175                             ev->event_flags |= EVAS_EVENT_FLAG_ON_HOLD;
2176                             if (!sd->down.hold)
2177                               {
2178                                  sd->down.hold = 1;
2179                                  evas_event_feed_hold(e, 1, ev->timestamp, ev->data);
2180                               }
2181                          }
2182                     }
2183                }
2184              else if (!sd->freeze)
2185                {
2186                   Evas_Coord ex, ey, ew, eh;
2187                   double vx = 0.0, vy = 0.0;
2188
2189                   evas_object_geometry_get(sd->event_obj, &ex, &ey, &ew, &eh);
2190                   x = ev->cur.canvas.x - ex;
2191                   y = ev->cur.canvas.y - ey;
2192                   if (x < _elm_config->thumbscroll_threshold)
2193                     {
2194                        if (_elm_config->thumbscroll_threshold > 0.0)
2195                          vx = -(double)(_elm_config->thumbscroll_threshold - x) /
2196                          _elm_config->thumbscroll_threshold;
2197                        else
2198                          vx = -1.0;
2199                     }
2200                   else if (x > (ew - _elm_config->thumbscroll_threshold))
2201                     {
2202                        if (_elm_config->thumbscroll_threshold > 0.0)
2203                          vx = (double)(_elm_config->thumbscroll_threshold - (ew - x)) /
2204                          _elm_config->thumbscroll_threshold;
2205                        else
2206                          vx = 1.0;
2207                     }
2208                   if (y < _elm_config->thumbscroll_threshold)
2209                     {
2210                        if (_elm_config->thumbscroll_threshold > 0.0)
2211                          vy = -(double)(_elm_config->thumbscroll_threshold - y) /
2212                          _elm_config->thumbscroll_threshold;
2213                        else
2214                          vy = -1.0;
2215                     }
2216                   else if (y > (eh - _elm_config->thumbscroll_threshold))
2217                     {
2218                        if (_elm_config->thumbscroll_threshold > 0.0)
2219                          vy = (double)(_elm_config->thumbscroll_threshold - (eh - y)) /
2220                          _elm_config->thumbscroll_threshold;
2221                        else
2222                          vy = 1.0;
2223                     }
2224                   if ((vx != 0.0) || (vy != 0.0))
2225                     {
2226                        sd->down.onhold_vx = vx;
2227                        sd->down.onhold_vy = vy;
2228                        if (!sd->down.onhold_animator)
2229                          {
2230                             sd->down.onhold_vxe = 0.0;
2231                             sd->down.onhold_vye = 0.0;
2232                             sd->down.onhold_tlast = 0.0;
2233                             sd->down.onhold_animator = ecore_animator_add(_smart_onhold_animator, sd);
2234                          }
2235 //                       printf("b %i %i\n", sd->down.hold_x, sd->down.hold_y);
2236                     }
2237                   else
2238                     {
2239                        if (sd->down.onhold_animator)
2240                          {
2241                             ecore_animator_del(sd->down.onhold_animator);
2242                             sd->down.onhold_animator = NULL;
2243                          }
2244                     }
2245                }
2246           }
2247      }
2248 }
2249
2250 static void
2251 _smart_scrollbar_read(Smart_Data *sd)
2252 {
2253    Evas_Coord x, y, mx = 0, my = 0, px, py, minx = 0, miny = 0;
2254    double vx, vy;
2255
2256    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2257    edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2258    sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2259    sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2260    x = vx * (double)mx + minx;
2261    y = vy * (double)my + miny;
2262    sd->pan_func.get(sd->pan_obj, &px, &py);
2263    sd->pan_func.set(sd->pan_obj, x, y);
2264    if ((px != x) || (py != y))
2265      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2266 }
2267
2268 static void
2269 _smart_scrollbar_reset(Smart_Data *sd)
2270 {
2271    Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2272
2273    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2274    edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2275    if ((!sd->child_obj) && (!sd->extern_pan))
2276      {
2277         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2278         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2279      }
2280    if (sd->pan_obj)
2281      {
2282         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2283         sd->pan_func.get(sd->pan_obj, &px, &py);
2284         sd->pan_func.set(sd->pan_obj, minx, miny);
2285      }
2286    if ((px != minx) || (py != miny))
2287      edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2288 }
2289
2290 static int
2291 _smart_scrollbar_bar_v_visibility_adjust(Smart_Data *sd)
2292 {
2293    int scroll_v_vis_change = 0;
2294    Evas_Coord h, vw = 0, vh = 0;
2295
2296    h = sd->child.h;
2297    if (sd->pan_obj)
2298      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2299    if (sd->vbar_visible)
2300      {
2301         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2302           {
2303              if ((sd->child_obj) || (sd->extern_pan))
2304                {
2305                   if (h <= vh)
2306                     {
2307                        scroll_v_vis_change = 1;
2308                        sd->vbar_visible = 0;
2309                     }
2310                }
2311              else
2312                {
2313                   scroll_v_vis_change = 1;
2314                   sd->vbar_visible = 0;
2315                }
2316           }
2317         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2318           {
2319              scroll_v_vis_change = 1;
2320              sd->vbar_visible = 0;
2321           }
2322      }
2323    else
2324      {
2325         if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2326           {
2327              if ((sd->child_obj) || (sd->extern_pan))
2328                {
2329                   if (h > vh)
2330                     {
2331                        scroll_v_vis_change = 1;
2332                        sd->vbar_visible = 1;
2333                     }
2334                }
2335           }
2336         else if (sd->vbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2337           {
2338              scroll_v_vis_change = 1;
2339              sd->vbar_visible = 1;
2340           }
2341      }
2342    if (scroll_v_vis_change)
2343      {
2344         if (sd->vbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2345           {
2346              if (sd->vbar_visible)
2347                edje_object_signal_emit(sd->edje_obj, "elm,action,show,vbar", "elm");
2348              else
2349                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2350              edje_object_message_signal_process(sd->edje_obj);
2351              _smart_scrollbar_size_adjust(sd);
2352           }
2353         else
2354           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,vbar", "elm");
2355      }
2356    return scroll_v_vis_change;
2357 }
2358
2359 static int
2360 _smart_scrollbar_bar_h_visibility_adjust(Smart_Data *sd)
2361 {
2362    int scroll_h_vis_change = 0;
2363    Evas_Coord w, vw = 0, vh = 0;
2364
2365    w = sd->child.w;
2366    if (sd->pan_obj)
2367      evas_object_geometry_get(sd->pan_obj, NULL, NULL, &vw, &vh);
2368    if (sd->hbar_visible)
2369      {
2370         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2371           {
2372              if ((sd->child_obj) || (sd->extern_pan))
2373                {
2374                   if (w <= vw)
2375                     {
2376                        scroll_h_vis_change = 1;
2377                        sd->hbar_visible = 0;
2378                     }
2379                }
2380              else
2381                {
2382                   scroll_h_vis_change = 1;
2383                   sd->hbar_visible = 0;
2384                }
2385           }
2386         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_OFF)
2387           {
2388              scroll_h_vis_change = 1;
2389              sd->hbar_visible = 0;
2390           }
2391      }
2392    else
2393      {
2394         if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_AUTO)
2395           {
2396              if ((sd->child_obj) || (sd->extern_pan))
2397                {
2398                   if (w > vw)
2399                     {
2400                        scroll_h_vis_change = 1;
2401                        sd->hbar_visible = 1;
2402                     }
2403                }
2404           }
2405         else if (sd->hbar_flags == ELM_SMART_SCROLLER_POLICY_ON)
2406           {
2407              scroll_h_vis_change = 1;
2408              sd->hbar_visible = 1;
2409           }
2410      }
2411    if (scroll_h_vis_change)
2412      {
2413         if (sd->hbar_flags != ELM_SMART_SCROLLER_POLICY_OFF)
2414           {
2415              if (sd->hbar_visible)
2416                edje_object_signal_emit(sd->edje_obj, "elm,action,show,hbar", "elm");
2417              else
2418                edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2419              edje_object_message_signal_process(sd->edje_obj);
2420              _smart_scrollbar_size_adjust(sd);
2421           }
2422         else
2423           edje_object_signal_emit(sd->edje_obj, "elm,action,hide,hbar", "elm");
2424         _smart_scrollbar_size_adjust(sd);
2425      }
2426    return scroll_h_vis_change;
2427 }
2428
2429 static void
2430 _smart_scrollbar_bar_visibility_adjust(Smart_Data *sd)
2431 {
2432    int changed = 0;
2433
2434    changed |= _smart_scrollbar_bar_h_visibility_adjust(sd);
2435    changed |= _smart_scrollbar_bar_v_visibility_adjust(sd);
2436    if (changed)
2437      {
2438         _smart_scrollbar_bar_h_visibility_adjust(sd);
2439         _smart_scrollbar_bar_v_visibility_adjust(sd);
2440      }
2441 }
2442
2443 static void
2444 _smart_scrollbar_size_adjust(Smart_Data *sd)
2445 {
2446    if ((sd->child_obj) || (sd->extern_pan))
2447      {
2448         Evas_Coord x, y, w, h, mx = 0, my = 0, vw = 0, vh = 0, px, py, minx = 0, miny = 0;
2449         double vx, vy, size;
2450
2451         edje_object_part_geometry_get(sd->edje_obj, "elm.swallow.content",
2452                                       NULL, NULL, &vw, &vh);
2453         w = sd->child.w;
2454         if (w < 1) w = 1;
2455         size = (double)vw / (double)w;
2456         if (size > 1.0)
2457           {
2458              size = 1.0;
2459              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.hbar", 0.0, 0.0);
2460           }
2461         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", size, 1.0);
2462
2463         h = sd->child.h;
2464         if (h < 1) h = 1;
2465         size = (double)vh / (double)h;
2466         if (size > 1.0)
2467           {
2468              size = 1.0;
2469              edje_object_part_drag_value_set(sd->edje_obj, "elm.dragable.vbar", 0.0, 0.0);
2470           }
2471         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, size);
2472
2473         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.hbar", &vx, NULL);
2474         edje_object_part_drag_value_get(sd->edje_obj, "elm.dragable.vbar", NULL, &vy);
2475         sd->pan_func.max_get(sd->pan_obj, &mx, &my);
2476         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2477         x = vx * mx + minx;
2478         y = vy * my + miny;
2479
2480         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->step.x / (double)w, 0.0);
2481         edje_object_part_drag_step_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->step.y / (double)h);
2482         if (sd->page.x > 0)
2483           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", (double)sd->page.x / (double)w, 0.0);
2484         else
2485           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.hbar", -((double)sd->page.x * ((double)vw / (double)w)) / 100.0, 0.0);
2486         if (sd->page.y > 0)
2487           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, (double)sd->page.y / (double)h);
2488         else
2489           edje_object_part_drag_page_set(sd->edje_obj, "elm.dragable.vbar", 0.0, -((double)sd->page.y * ((double)vh / (double)h)) / 100.0);
2490
2491         sd->pan_func.get(sd->pan_obj, &px, &py);
2492         if (vx != mx) x = px;
2493         if (vy != my) y = py;
2494         sd->pan_func.set(sd->pan_obj, x, y);
2495 //      if ((px != 0) || (py != 0))
2496 //        edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2497      }
2498    else
2499      {
2500         Evas_Coord px = 0, py = 0, minx = 0, miny = 0;
2501
2502         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.vbar", 1.0, 1.0);
2503         edje_object_part_drag_size_set(sd->edje_obj, "elm.dragable.hbar", 1.0, 1.0);
2504         sd->pan_func.min_get(sd->pan_obj, &minx, &miny);
2505         sd->pan_func.get(sd->pan_obj, &px, &py);
2506         sd->pan_func.set(sd->pan_obj, minx, miny);
2507         if ((px != minx) || (py != miny))
2508           edje_object_signal_emit(sd->edje_obj, "elm,action,scroll", "elm");
2509      }
2510    _smart_scrollbar_bar_visibility_adjust(sd);
2511 }
2512
2513 static void
2514 _smart_reconfigure(Smart_Data *sd)
2515 {
2516    evas_object_move(sd->edje_obj, sd->x, sd->y);
2517    evas_object_resize(sd->edje_obj, sd->w, sd->h);
2518    evas_object_move(sd->event_obj, sd->x, sd->y);
2519    evas_object_resize(sd->event_obj, sd->w, sd->h);
2520    _smart_scrollbar_size_adjust(sd);
2521 }
2522
2523 static void
2524 _smart_add(Evas_Object *obj)
2525 {
2526    Smart_Data *sd;
2527    Evas_Object *o;
2528
2529    sd = calloc(1, sizeof(Smart_Data));
2530    if (!sd) return;
2531    evas_object_smart_data_set(obj, sd);
2532
2533    sd->smart_obj = obj;
2534    sd->x = 0;
2535    sd->y = 0;
2536    sd->w = 0;
2537    sd->h = 0;
2538    sd->step.x = 32;
2539    sd->step.y = 32;
2540    sd->page.x = -50;
2541    sd->page.y = -50;
2542    sd->hbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2543    sd->vbar_flags = ELM_SMART_SCROLLER_POLICY_AUTO;
2544    sd->hbar_visible = 1;
2545    sd->vbar_visible = 1;
2546
2547    sd->bounce_horiz = 1;
2548    sd->bounce_vert = 1;
2549
2550    sd->one_dir_at_a_time = 1;
2551    sd->momentum_animator_disabled = 0;
2552    sd->bounce_animator_disabled = 0;
2553
2554    o = edje_object_add(evas_object_evas_get(obj));
2555    evas_object_propagate_events_set(o, 0);
2556    sd->edje_obj = o;
2557    elm_smart_scroller_object_theme_set(NULL, obj, "scroller", "base", "default");
2558    edje_object_signal_callback_add(o, "drag", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2559    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.vbar", _smart_edje_drag_v_start, sd);
2560    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.vbar", _smart_edje_drag_v_stop, sd);
2561    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2562    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.vbar", _smart_edje_drag_v, sd);
2563    edje_object_signal_callback_add(o, "drag", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2564    edje_object_signal_callback_add(o, "drag,start", "elm.dragable.hbar", _smart_edje_drag_h_start, sd);
2565    edje_object_signal_callback_add(o, "drag,stop", "elm.dragable.hbar", _smart_edje_drag_h_stop, sd);
2566    edje_object_signal_callback_add(o, "drag,step", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2567    edje_object_signal_callback_add(o, "drag,page", "elm.dragable.hbar", _smart_edje_drag_h, sd);
2568    evas_object_smart_member_add(o, obj);
2569
2570    o = evas_object_rectangle_add(evas_object_evas_get(obj));
2571    sd->event_obj = o;
2572    evas_object_color_set(o, 0, 0, 0, 0);
2573    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_WHEEL, _smart_event_wheel, sd);
2574    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN, _smart_event_mouse_down, sd);
2575    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_UP, _smart_event_mouse_up, sd);
2576    evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_MOVE, _smart_event_mouse_move, sd);
2577    evas_object_smart_member_add(o, obj);
2578    evas_object_repeat_events_set(o, 1);
2579
2580    sd->pan_func.set = _elm_smart_pan_set;
2581    sd->pan_func.get = _elm_smart_pan_get;
2582    sd->pan_func.max_get = _elm_smart_pan_max_get;
2583    sd->pan_func.min_get = _elm_smart_pan_min_get;
2584    sd->pan_func.child_size_get = _elm_smart_pan_child_size_get;
2585
2586    _smart_scrollbar_reset(sd);
2587 }
2588
2589 static void
2590 _smart_del(Evas_Object *obj)
2591 {
2592    INTERNAL_ENTRY;
2593    elm_smart_scroller_child_set(obj, NULL);
2594    if (!sd->extern_pan) evas_object_del(sd->pan_obj);
2595    evas_object_del(sd->edje_obj);
2596    evas_object_del(sd->event_obj);
2597    if (sd->down.hold_animator) ecore_animator_del(sd->down.hold_animator);
2598    if (sd->down.onhold_animator) ecore_animator_del(sd->down.onhold_animator);
2599    if (sd->down.momentum_animator) ecore_animator_del(sd->down.momentum_animator);
2600    if (sd->down.bounce_x_animator) ecore_animator_del(sd->down.bounce_x_animator);
2601    if (sd->down.bounce_y_animator) ecore_animator_del(sd->down.bounce_y_animator);
2602    if (sd->scrollto.x.animator) ecore_animator_del(sd->scrollto.x.animator);
2603    if (sd->scrollto.y.animator) ecore_animator_del(sd->scrollto.y.animator);
2604    free(sd);
2605    evas_object_smart_data_set(obj, NULL);
2606 }
2607
2608 static void
2609 _smart_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
2610 {
2611    INTERNAL_ENTRY;
2612    sd->x = x;
2613    sd->y = y;
2614    _smart_reconfigure(sd);
2615 }
2616
2617 static void
2618 _smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
2619 {
2620    INTERNAL_ENTRY;
2621    sd->w = w;
2622    sd->h = h;
2623    _smart_reconfigure(sd);
2624    _elm_smart_scroller_wanted_region_set(obj);
2625 }
2626
2627 static void
2628 _smart_show(Evas_Object *obj)
2629 {
2630    INTERNAL_ENTRY;
2631    evas_object_show(sd->edje_obj);
2632    evas_object_show(sd->event_obj);
2633 }
2634
2635 static void
2636 _smart_hide(Evas_Object *obj)
2637 {
2638    INTERNAL_ENTRY;
2639    evas_object_hide(sd->edje_obj);
2640    evas_object_hide(sd->event_obj);
2641 }
2642
2643 static void
2644 _smart_color_set(Evas_Object *obj, int r, int g, int b, int a)
2645 {
2646    INTERNAL_ENTRY;
2647    evas_object_color_set(sd->edje_obj, r, g, b, a);
2648 }
2649
2650 static void
2651 _smart_clip_set(Evas_Object *obj, Evas_Object *clip)
2652 {
2653    INTERNAL_ENTRY;
2654    evas_object_clip_set(sd->edje_obj, clip);
2655    evas_object_clip_set(sd->event_obj, clip);
2656 }
2657
2658 static void
2659 _smart_clip_unset(Evas_Object *obj)
2660 {
2661    INTERNAL_ENTRY;
2662    evas_object_clip_unset(sd->edje_obj);
2663    evas_object_clip_unset(sd->event_obj);
2664 }
2665
2666 /* never need to touch this */
2667
2668 static void
2669 _smart_init(void)
2670 {
2671    if (_smart) return;
2672      {
2673         static const Evas_Smart_Class sc =
2674           {
2675              SMART_NAME,
2676                EVAS_SMART_CLASS_VERSION,
2677                _smart_add,
2678                _smart_del,
2679                _smart_move,
2680                _smart_resize,
2681                _smart_show,
2682                _smart_hide,
2683                _smart_color_set,
2684                _smart_clip_set,
2685                _smart_clip_unset,
2686                NULL,
2687                NULL,
2688                NULL,
2689                NULL,
2690                NULL,
2691                NULL,
2692                NULL
2693           };
2694         _smart = evas_smart_class_new(&sc);
2695      }
2696 }
2697