Change the method to calculate a distance which be scrolled from linear to sine curve.

And add the configuration thumbscroll_flick_distance_tolerance. It's the max flick distance.

legacy/elementary/ChangeLog

@@ -1482,3 +1482,8 @@
 
         * added callback call "scroll", "scroll,anim,start", "scroll,anim,stop", "scroll,drag,start", "scroll,drag,stop"
         in toolar widget.
+
+2013-07-03  Jaehwan Kim
+
+        * Change the method to calculate a distance which be scrolled from linear to sine curve.
+        And add the configuration thumbscroll_flick_distance_tolerance. It's the max flick distance.

legacy/elementary/NEWS

@@ -78,6 +78,7 @@ Additions:
    * Add elm_fileselector_mime_type_filter_append and elm_fileselector_filters_clear to support mime type filter.
    * Add the elm_scrollable_interface_content_viewport_resize_cb_set.
    * added callback call "scroll", "scroll,anim,start", "scroll,anim,stop", "scroll,drag,start", "scroll,drag,stop" in toolar widget.
+   * Add the configuration thumbscroll_flick_distance_tolerance.
 
 Improvements:
 
@@ -119,6 +120,7 @@ Improvements:
    * Support language change for widget items (Ctxpopup, Hoversel, Naviframe, Diskselector, List, Menu, Segment_Control, Toolbar, Popup, MultibuttonEntry)
    * Move cursor when mouse moves with longpress.
    * Show magnifier when selection handlers are pressed or moved.
+   * Change the method to calculate a distance which be scrolled from linear to sine curve.
 
 Fixes:
    * Now elm_datetime_field_limit_set() can set year limits wihtout problems.

legacy/elementary/config/default/base.src

@@ -6,6 +6,7 @@ group "Elm_Config" struct {
   value "thumbscroll_threshold" int: 24;
   value "thumbscroll_hold_threshold" int: 24;
   value "thumbscroll_momentum_threshold" double: 100.0;
+  value "thumbscroll_flick_distance_tolerance" int: 1000;
   value "thumbscroll_friction" double: 1.0;
   value "thumbscroll_min_friction" double: 1.0;
   value "thumbscroll_friction_standard" double: 2000.0;

legacy/elementary/config/mobile/base.src

@@ -6,6 +6,7 @@ group "Elm_Config" struct {
   value "thumbscroll_threshold" int: 24;
   value "thumbscroll_hold_threshold" int: 100;
   value "thumbscroll_momentum_threshold" double: 100.0;
+  value "thumbscroll_flick_distance_tolerance" int: 1000;
   value "thumbscroll_friction" double: 1.0;
   value "thumbscroll_min_friction" double: 0.3;
   value "thumbscroll_friction_standard" double: 3000.0;

legacy/elementary/config/standard/base.src

@@ -6,6 +6,7 @@ group "Elm_Config" struct {
   value "thumbscroll_threshold" int: 4;
   value "thumbscroll_hold_threshold" int: 4;
   value "thumbscroll_momentum_threshold" double: 100.0;
+  value "thumbscroll_flick_distance_tolerance" int: 1000;
   value "thumbscroll_friction" double: 1.0;
   value "thumbscroll_min_friction" double: 1.0;
   value "thumbscroll_friction_standard" double: 2000.0;

legacy/elementary/src/bin/config.c

@@ -346,6 +346,31 @@ tsmt_change(void *data       __UNUSED__,
    elm_config_all_flush();
 }
 
+static void
+tsfdt_round(void *data       __UNUSED__,
+            Evas_Object     *obj,
+            void *event_info __UNUSED__)
+{
+   double val = elm_slider_value_get(obj);
+   double v;
+
+   v = ((double)((int)(val * 10.0))) / 10.0;
+   if (v != val) elm_slider_value_set(obj, v);
+}
+
+static void
+tsfdt_change(void *data       __UNUSED__,
+             Evas_Object     *obj,
+             void *event_info __UNUSED__)
+{
+   double tsfdt = elm_config_scroll_thumbscroll_flick_distance_tolerance_get();
+   double val = elm_slider_value_get(obj);
+
+   if (tsfdt == val) return;
+   elm_config_scroll_thumbscroll_flick_distance_tolerance_set(val);
+   elm_config_all_flush();
+}
+
 static void
 tsf_round(void *data       __UNUSED__,
           Evas_Object     *obj,
@@ -1122,7 +1147,8 @@ _config_display_update(Evas_Object *win)
 {
    int flush_interval, font_c, image_c, edje_file_c, edje_col_c, ts_threshould,
        ts_hold_threshold;
-   double scale, s_bounce_friction, ts_momentum_threshold, ts_friction,
+   double scale, s_bounce_friction, ts_momentum_threshold,
+          ts_flick_distance_tolerance, ts_friction,
           ts_min_friction, ts_friction_standard, ts_border_friction,
           ts_sensitivity_friction, ts_acceleration_threshold,
           ts_acceleration_time_limit, ts_acceleration_weight, page_friction,
@@ -1148,6 +1174,7 @@ _config_display_update(Evas_Object *win)
    ts_threshould = elm_config_scroll_thumbscroll_threshold_get();
    ts_hold_threshold = elm_config_scroll_thumbscroll_hold_threshold_get();
    ts_momentum_threshold = elm_config_scroll_thumbscroll_momentum_threshold_get();
+   ts_flick_distance_tolerance = elm_config_scroll_thumbscroll_flick_distance_tolerance_get();
    ts_friction = elm_config_scroll_thumbscroll_friction_get();
    ts_min_friction = elm_config_scroll_thumbscroll_min_friction_get();
    ts_friction_standard = elm_config_scroll_thumbscroll_friction_standard_get();
@@ -1191,6 +1218,9 @@ _config_display_update(Evas_Object *win)
    elm_slider_value_set(evas_object_data_get(win,
                                              "ts_momentum_threshold_slider"),
                         ts_momentum_threshold);
+   elm_slider_value_set(evas_object_data_get(win,
+                                             "ts_flick_distance_tolerance_slider"),
+                        ts_flick_distance_tolerance);
    elm_slider_value_set(evas_object_data_get(win,
                                              "ts_friction_slider"),
                         ts_friction);
@@ -2888,6 +2918,27 @@ _status_config_scrolling(Evas_Object *win,
    evas_object_smart_callback_add(sl, "delay,changed", tsmt_change,
                                   NULL);
 
+   LABEL_FRAME_ADD("<hilight>Thumb scroll flick distance tolerance</>");
+
+   sl = elm_slider_add(win);
+   elm_object_tooltip_text_set(sl, "This is the number of pixels the maximum<br/>"
+                                   "distance which can be flicked. If it is<br/>"
+                                   "flicked more than this, the flick distance<br/>"
+                                   "is same with maximum distance");
+   evas_object_data_set(win, "ts_flick_distance_tolerance_slider", sl);
+   evas_object_size_hint_weight_set(sl, EVAS_HINT_EXPAND, 0.0);
+   evas_object_size_hint_align_set(sl, EVAS_HINT_FILL, 0.5);
+   elm_slider_span_size_set(sl, 120);
+   elm_slider_unit_format_set(sl, "%1.0f pixels");
+   elm_slider_indicator_format_set(sl, "%1.0f");
+   elm_slider_min_max_set(sl, 100.0, 3000.0);
+   elm_slider_value_set(sl, elm_config_scroll_thumbscroll_flick_distance_tolerance_get());
+   elm_box_pack_end(bx, sl);
+   evas_object_show(sl);
+
+   evas_object_smart_callback_add(sl, "changed", tsfdt_round, NULL);
+   evas_object_smart_callback_add(sl, "delay,changed", tsfdt_change, NULL);
+
    LABEL_FRAME_ADD("<hilight>Thumb scroll friction</>");
 
    sl = elm_slider_add(win);

legacy/elementary/src/lib/elm_config.c

@@ -342,6 +342,7 @@ _desc_init(void)
    ELM_CONFIG_VAL(D, T, thumbscroll_threshold, T_INT);
    ELM_CONFIG_VAL(D, T, thumbscroll_hold_threshold, T_INT);
    ELM_CONFIG_VAL(D, T, thumbscroll_momentum_threshold, T_DOUBLE);
+   ELM_CONFIG_VAL(D, T, thumbscroll_flick_distance_tolerance, T_INT);
    ELM_CONFIG_VAL(D, T, thumbscroll_friction, T_DOUBLE);
    ELM_CONFIG_VAL(D, T, thumbscroll_min_friction, T_DOUBLE);
    ELM_CONFIG_VAL(D, T, thumbscroll_friction_standard, T_DOUBLE);
@@ -1085,6 +1086,7 @@ _config_load(void)
    _elm_config->thumbscroll_threshold = 24;
    _elm_config->thumbscroll_hold_threshold = 24;
    _elm_config->thumbscroll_momentum_threshold = 100.0;
+   _elm_config->thumbscroll_flick_distance_tolerance = 1000;
    _elm_config->thumbscroll_friction = 1.0;
    _elm_config->thumbscroll_min_friction = 0.5;
    _elm_config->thumbscroll_friction_standard = 1000.0;
@@ -1507,6 +1509,8 @@ _env_get(void)
    // FIXME: floatformat locale issues here 1.0 vs 1,0 - should just be 1.0
    s = getenv("ELM_THUMBSCROLL_MOMENTUM_THRESHOLD");
    if (s) _elm_config->thumbscroll_momentum_threshold = _elm_atof(s);
+   s = getenv("ELM_THUMBSCROLL_FLICK_DISTANCE_TOLERANCE");
+   if (s) _elm_config->thumbscroll_flick_distance_tolerance = atoi(s);
    s = getenv("ELM_THUMBSCROLL_FRICTION");
    if (s) _elm_config->thumbscroll_friction = _elm_atof(s);
    s = getenv("ELM_THUMBSCROLL_MIN_FRICTION");
@@ -2182,6 +2186,18 @@ elm_config_scroll_thumbscroll_momentum_threshold_set(double threshold)
    _elm_config->thumbscroll_momentum_threshold = threshold;
 }
 
+EAPI unsigned int
+elm_config_scroll_thumbscroll_flick_distance_tolerance_get(void)
+{
+   return _elm_config->thumbscroll_flick_distance_tolerance;
+}
+
+EAPI void
+elm_config_scroll_thumbscroll_flick_distance_tolerance_set(unsigned int distance)
+{
+   _elm_config->thumbscroll_flick_distance_tolerance = distance;
+}
+
 EAPI double
 elm_config_scroll_thumbscroll_friction_get(void)
 {

legacy/elementary/src/lib/elm_config.h

@@ -349,6 +349,29 @@ EAPI double       elm_config_scroll_thumbscroll_momentum_threshold_get(void);
  */
 EAPI void         elm_config_scroll_thumbscroll_momentum_threshold_set(double threshold);
 
+/**
+ * Get the number of pixels the maximum distance which can be flicked.
+ * If it is flicked more than this,
+ * the flick distance is same with maximum distance.
+ *
+ * @return the thumb scroll maximum flick distance
+ *
+ * @ingroup Scrolling
+ */
+EAPI unsigned int elm_config_scroll_thumbscroll_flick_distance_tolerance_get(void);
+
+/**
+ * Set the number of pixels the maximum distance which can be flicked.
+ * If it is flicked more than this,
+ * the flick distance is same with maximum distance.
+ *
+ * @param distance the thumb scroll maximum flick distance
+ *
+ * @see elm_config_thumbscroll_flick_distance_tolerance_get()
+ * @ingroup Scrolling
+ */
+EAPI void         elm_config_scroll_thumbscroll_flick_distance_tolerance_set(unsigned int distance);
+
 /**
  * Get the amount of inertia a scroller will impose at self scrolling
  * animations.

legacy/elementary/src/lib/elm_interface_scrollable.c

@@ -2400,6 +2400,7 @@ _elm_scroll_mouse_up_event_cb(void *data,
                        if ((_elm_config->thumbscroll_friction > 0.0) &&
                            (vel > _elm_config->thumbscroll_momentum_threshold))
                          {
+                            Evas_Coord vw, vh, max_d;
                             int minx, miny, mx, my, px, py;
                             double tt = 0.0, dtt = 0.0;
 
@@ -2408,8 +2409,21 @@ _elm_scroll_mouse_up_event_cb(void *data,
                             eo_do(sid->pan_obj, elm_obj_pan_pos_max_get
                                   (&mx, &my));
                             eo_do(sid->pan_obj, elm_obj_pan_pos_get(&px, &py));
-                            sid->down.dx = ((double)dx / at);
+                            eo_do(sid->obj,
-                            sid->down.dy = ((double)dy / at);
+                                  elm_scrollable_interface_content_viewport_size_get(&vw, &vh));
+                            max_d = _elm_config->thumbscroll_flick_distance_tolerance;
+                            if (dx > 0)
+                              sid->down.dx = (sin((M_PI * (double)dx / max_d)
+                                                  - (M_PI / 2)) + 1) * max_d / at;
+                            else
+                              sid->down.dx = (sin((M_PI * (double)dx / max_d)
+                                                  + (M_PI / 2)) - 1) * max_d / at;
+                            if (dy > 0)
+                              sid->down.dy = (sin((M_PI * (double)dy / max_d)
+                                                  - (M_PI / 2)) + 1) * max_d / at;
+                            else
+                              sid->down.dy = (sin((M_PI * (double)dy / max_d)
+                                                  + (M_PI / 2)) - 1) * max_d / at;
                             if (((sid->down.dx > 0) && (sid->down.pdx > 0)) ||
                                 ((sid->down.dx < 0) && (sid->down.pdx < 0)) ||
                                 ((sid->down.dy > 0) && (sid->down.pdy > 0)) ||

legacy/elementary/src/lib/elm_priv.h

@@ -161,6 +161,7 @@ struct _Elm_Config
    int           thumbscroll_threshold;
    int           thumbscroll_hold_threshold;
    double        thumbscroll_momentum_threshold;
+   int           thumbscroll_flick_distance_tolerance;
    double        thumbscroll_friction;
    double        thumbscroll_min_friction;
    double        thumbscroll_friction_standard;