Hi CodeWarrior,
Thanks for feedbacking of the kinetic scrolling stuff.
I personally like to watch them bouncing all around so I set the
variables and
allow them changed very fast. :-P
As you suggested I'd like to make this not bouncing too fast, and here
is the patch.
:-)
With this patch, the partial speed will calculated with last speed.
Also set the MAX_SPEED in case of a quick slide in a very short time
period.
That will make the scrolled view not bouncing so fast.
Cheers,
Tick
Index: etk/src/lib/etk_scrolled_view.c
===================================================================
--- etk.orig/src/lib/etk_scrolled_view.c 2008-04-29 14:08:18.000000000 +0800
+++ etk/src/lib/etk_scrolled_view.c 2008-04-29 15:09:22.000000000 +0800
@@ -716,6 +716,8 @@
drag->mouse_down = ETK_TRUE;
drag->timestamp = ecore_time_get();
drag->old_timestamp = 0.0f;
+ drag->Vx=0;
+ drag->Vy=0;
drag->position = event->widget;
drag->bar_position.x = hscrollbar_range->value;
drag->bar_position.y = vscrollbar_range->value;
@@ -767,8 +769,8 @@
{
drag->old_timestamp = drag->timestamp;
drag->timestamp = ecore_time_get();
- drag->Vx = (hscrollbar_range->value - drag->bar_position.x) / delta_time;
- drag->Vy = (vscrollbar_range->value - drag->bar_position.y) / delta_time;
+ drag->Vx = (drag->Vx + (hscrollbar_range->value - drag->bar_position.x) / delta_time) / 2;
+ drag->Vy = (drag->Vy + (vscrollbar_range->value - drag->bar_position.y) / delta_time) / 2;
drag->bar_position.x = hscrollbar_range->value;
drag->bar_position.y = vscrollbar_range->value;
}
@@ -803,6 +805,14 @@
if (drag->scroll_flag)
{
drag->timestamp = ecore_time_get();
+ int MAX_SPEED = ETK_SCROLLED_VIEW_DRAG_DAMPING_MAGIC*5;
+ drag->Vx = drag->Vx > 0 ?
+ drag->Vx > MAX_SPEED ? MAX_SPEED : drag->Vx :
+ drag->Vx < -MAX_SPEED ? -MAX_SPEED : drag->Vx;
+ drag->Vy = drag->Vy > 0 ?
+ drag->Vy > MAX_SPEED ? MAX_SPEED : drag->Vy :
+ drag->Vy < -MAX_SPEED ? -MAX_SPEED : drag->Vy;
+
ecore_animator_add(&_etk_scrolled_view_motive_bounce, scrolled_view);
return ETK_TRUE;
}
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