WPF
Windows-XP SP3
I'm having a problem with a simple WPF animation.
I use
the following Xaml code (in XamlPad and also in a WPF project):
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:sys="clr-namespace:System;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" >
<Border Name="MyBorder" BorderThickness="10" BorderBrush="Blue" CornerRadius="10" Background="DarkRed" >
<Rectangle Name="MyRectangle" Margin="10" StrokeDashArray="2.0,1.0" StrokeThickness="10" RadiusX="10" RadiusY="10" Stroke="Black" StrokeDashOffset="0">
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Rectangle.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="MyRectangle" Storyboard.TargetProperty="StrokeDashOffset" From="0.0" To="3.0" Duration="0:0:1" RepeatBehavior="Forever" Timeline.DesiredFrameRate="30" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
</Border>
</Page>
It has
the effect of causing
the border to animate around
the rectangle. After a fresh reboot of
the machine, this animation is nice and smooth. However, I tend to leave my
machine on all
the time and after a period time elapses (I don't know how long),
the animation starts stuttering and becomes choppy.
I thought that it may be memory or resource issues, but after shutting down all other apps and any services that seem unnecessary,
the stuttering still continues. However, after a system reboot,
the animation is smooth again!
I get
the same symptoms in a WPF app or in XamlPad. In
the case of
the app, it doesn't seem to make any difference whether I run in
the debugger or if I run
the executable directly.
I applied
the patch at this link: http://support.microsoft.com/kb/981741 and I thought that it had taken care of
the issue, but it seems not to have.
I have seen some posts that might indicate that using transparency might affect animation, but as you can see, my xaml does not use transparency.
Can anyone give me some suggestions on how to determine what
the problem is? Are there any WPF diagnostic tools that might help?
UPDATE: I have checked my video drivers and they are
the latest version. (nVidia GeForce 8400 GS)
