The Silverlight model makes this type of animation very simple. Everything is handled within the XAML code. The XAML code looks like the following:
<Canvas xmlns="http://schemas.microsoft.com/client/2007"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="300" Height="200">
<Canvas.Triggers>
<EventTrigger RoutedEvent="Canvas.Loaded">
<BeginStoryboard>
<Storyboard Name="lineStoryboard">
<DoubleAnimation Storyboard.TargetName="mainLine" Storyboard.TargetProperty="X2" From="1" To="290" Duration="0:0:8" AutoReverse="false" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Canvas.Triggers>
<Line Name="mainLine" Canvas.Left="5" Canvas.Top="5" X1="0" Y1="0" X2="1" Y2="0" StrokeThickness="2" Stroke="#C0504D"></Line>
<Canvas Name="playAgainCanvas" MouseLeftButtonUp="playAgainCanvas_MouseLeftButtonUp" Canvas.Top="10" Canvas.Left="102">
<Rectangle RadiusX="5" RadiusY="5" Width="95" Height="40" Fill="#9BBB59"></Rectangle>
<TextBlock Text="Play Again" FontFamily="Verdana" Canvas.Left="5" Canvas.Top="10" FontSize="14" FontWeight="Bold" Foreground="white" />
</Canvas>
</Canvas>
The steps, which are derived from the Silverlight SDK, are as follows:
- Create a
DoubleAnimation
. In our case, we are concerned about animating the line being drawn, so the following are key attributes are set:StoryBoard.TargetProperty
- Set toX2
because we want to make the line grow in length.From
- Set this value to the default X2 position.To
- Set this value to the end result (290)Duration
- Set this value to 8 seconds just to make it easy to see the line grow.
- Place the
DoubleAnimation
inside of aStoryboard
. We give theStoryboard
aName
so that we can access it from the client-side code-behind file. This allows us to restart the animation through an event handler associated with the "Play Again" button. - Begin the
Storyboard
when theCanvas
is loaded. This is accomplished through the use of aTrigger
Animation will be covered in Chapter 4 of my upcoming book "Silverlight 1.1 in Action".
I want to apologize to anyone who has been trying to access code samples over the past couple of weeks. I use StreamLoad to host my code samples and they have had some problems over the past couple of weeks. Everything seems to be working better now. If the problems persist, I will look into an alternative solution.
Project Information | |
Source Code: | here |
Requirements: | Silverlight 1.0 |
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