[f-spot/FSPOT_0_6_0_STABLE] don't expect Expose event on Fader

[Stephane Delcroix <sdelcroix src gnome org>]

commit c4ed3c95020968a54f95723875cf7a32b96c513f
Author: Stephane Delcroix <stephane delcroix org>
Date:   Mon Aug 24 17:05:55 2009 +0200

    don't expect Expose event on Fader
    
    with gtk+ 2.17.3, exposeevents for toplevel are no longer fired. This rely on a Doubleanimation for changing the windows opacity instead of exposeevents

 src/Fader.cs |   40 ++++++++--------------------------------
 1 files changed, 8 insertions(+), 32 deletions(-)
---
diff --git a/src/Fader.cs b/src/Fader.cs
index f494088..057813e 100644
--- a/src/Fader.cs
+++ b/src/Fader.cs
@@ -12,24 +12,23 @@
 using System;
 using Gtk;
 using FSpot.Widgets;
+using FSpot.Bling;
 
 namespace FSpot {
 	public class Fader {
 		bool composited;
-		Delay fade_delay;
-		TimeSpan duration;
-		DateTime start;
 		Gtk.Window win;
 		double target_opacity;
-		
+		DoubleAnimation fadin;
+
 		public Fader (Gtk.Window win, double target, int sec)
 		{
 			this.win = win;
 			win.Mapped += HandleMapped;
 			win.Unmapped += HandleUnmapped;
-			win.ExposeEvent += HandleExposeEvent;
-			duration = new TimeSpan (0, 0, sec);
-			target_opacity = target;
+			fadin = new DoubleAnimation (0.0, target, new TimeSpan (0, 0, sec), delegate (double opacity) {
+				CompositeUtils.SetWinOpacity (win, opacity);
+			});	
 		}
 		
 		[GLib.ConnectBefore]
@@ -40,35 +39,12 @@ namespace FSpot {
 				return;
 			
 			CompositeUtils.SetWinOpacity (win, 0.0);
-		}
-		
-		public void HandleExposeEvent (object sender, ExposeEventArgs args)
-		{
-			if (fade_delay == null) {
-				fade_delay = new Delay (50, new GLib.IdleHandler (Update));
-					start = DateTime.Now;
-					fade_delay.Start ();
-			}
+			fadin.Start ();
 		}
 		
 		public void HandleUnmapped (object sender, EventArgs args)
 		{
-			if (fade_delay != null)
-				fade_delay.Stop ();
-		}
-		
-		public bool Update ()
-		{
-			double percent = Math.Min ((DateTime.Now - start).Ticks / (double) duration.Ticks, 1.0);
-			double opacity = Math.Sin (percent * Math.PI * 0.5) * target_opacity;
-			CompositeUtils.SetWinOpacity (win, opacity);
-			
-			bool stop = opacity >= target_opacity;
-
-			if (stop)
-				fade_delay.Stop ();
-			
-			return !stop;
+			fadin.Stop ();
 		}
 	}
 }