2008-05-20 Alejandro G. Castro <alex@igalia.com>

Bouncing effect added when touching the borders, you can change
	the elasticity of the border changing the ELASTICITY define.

	* src/hildon-pannable-area.c: Added ELASTICITY define.
	(hildon_pannable_area_timeout): Added inverse velocity when
	touching the border of the child widget, that causes a bounce.

diff --git a/ChangeLog b/ChangeLog
index faefcc9..538bc22 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,14 @@
 2008-05-20 Alejandro G. Castro <alex@igalia.com>
 
+       Bouncing effect added when touching the borders, you can change
+       the elasticity of the border changing the ELASTICITY define.
+       
+       * src/hildon-pannable-area.c: Added ELASTICITY define.
+       (hildon_pannable_area_timeout): Added inverse velocity when
+       touching the border of the child widget, that causes a bounce.
+
+2008-05-20 Alejandro G. Castro <alex@igalia.com>
+
        Improved performance, we now do not go to the X server in order to
        get the list of window children. Apparently the effect is the
        same, we have to be careful and check if this breaks something in

diff --git a/src/hildon-pannable-area.c b/src/hildon-pannable-area.c
index 9e43078..e48df7b 100644 (file)
--- a/src/hildon-pannable-area.c
+++ b/src/hildon-pannable-area.c
@@ -41,6 +41,7 @@
 
 #define SMOOTH_FACTOR 0.85
 #define FORCE 5
+#define ELASTICITY 0.3
 
 #include <gdk/gdkx.h>
 #include "hildon-pannable-area.h"
@@ -421,9 +422,16 @@ hildon_pannable_area_timeout                    (HildonPannableArea *area)
      * initial scroll position to the new mouse co-ordinate. This means
      * when you get to the top of the page, dragging down works immediately.
      */
-    if (!sx) priv->x = priv->ex;
-    if (!sy) priv->y = priv->ey;
+    if (!sx) {
+        priv->x = priv->ex;
+        priv->vel_x *= -1 * priv->decel * ELASTICITY;
+    }
 
+    if (!sy) {
+        priv->y = priv->ey;
+        priv->vel_y *= -1 * priv->decel * ELASTICITY;
+    }
+    
     return TRUE;
 }