Silverlight 3 引入了交互触发器,据我所知,它可以做你想做的事,但有点复杂。不过,关于它们的例子很少。
如果您手动执行此操作,则需要对 System.Windows.Interactivity 和 Microsoft.Expression.Interactions 的引用(从 Blend 3 开始,如果您已安装该类,则该类将在您的引用选项卡中)。
如果您在 Blend 中添加触发器,那么它将自动添加这些触发器。这在 Silverlight 3 中称为行为,您可以在“资产”选项卡的“行为”部分的 Blend 中找到这些。
他们如何工作的一个例子。请注意位于第二个矩形资源中的情节提要,我无法让它在 ControlStoryboardAction.Storyboard 中工作,但如果我将矩形设为 ContentControl 并将其放入模板中,它确实可以工作。这可能是一个错误或我错过了一些东西:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
x:Class="SLTrigger.MainPage"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:ic="clr-namespace:Microsoft.Expression.Interactivity.Core;assembly=Microsoft.Expression.Interactions"
xmlns:im="clr-namespace:Microsoft.Expression.Interactivity.Media;assembly=Microsoft.Expression.Interactions">
<Grid x:Name="LayoutRoot">
<StackPanel>
<Rectangle Margin="5" Fill="Blue" Width="200" Height="100">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonDown">
<ic:ChangePropertyAction PropertyName="Fill" Duration="0">
<ic:ChangePropertyAction.Value>
<SolidColorBrush Color="Red"/>
</ic:ChangePropertyAction.Value>
</ic:ChangePropertyAction>
</i:EventTrigger>
</i:Interaction.Triggers>
</Rectangle>
<Rectangle Margin="5" x:Name="AnimatedRectangle2" Fill="Blue" Width="200" Height="100">
<Rectangle.Resources>
<Storyboard x:Key="AnimationStoryboard">
<ColorAnimation
Storyboard.TargetName="AnimatedRectangle2"
Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"
To="Red"
AutoReverse="True"
Duration="0:0:0.5" />
</Storyboard>
</Rectangle.Resources>
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonDown">
<im:ControlStoryboardAction ControlStoryboardOption="Play" Storyboard="{StaticResource AnimationStoryboard}">
<!--
Doesn't work, but does work inside control templates??
<im:ControlStoryboardAction.Storyboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="AnimatedRectangle2"
Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"
To="Red"
AutoReverse="True"
Duration="0:0:0.5" />
</Storyboard>
</im:ControlStoryboardAction.Storyboard>
-->
</im:ControlStoryboardAction>
</i:EventTrigger>
</i:Interaction.Triggers>
</Rectangle>
<ContentControl>
<ContentControl.Template>
<ControlTemplate>
<Rectangle Margin="5" x:Name="AnimatedRectangle3" Fill="Blue" Width="200" Height="100">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonDown">
<im:ControlStoryboardAction ControlStoryboardOption="Play">
<im:ControlStoryboardAction.Storyboard>
<Storyboard>
<ColorAnimation
Storyboard.TargetName="AnimatedRectangle3"
Storyboard.TargetProperty="(Shape.Fill).(SolidColorBrush.Color)"
To="Red"
AutoReverse="True"
Duration="0:0:0.5" />
</Storyboard>
</im:ControlStoryboardAction.Storyboard>
</im:ControlStoryboardAction>
</i:EventTrigger>
</i:Interaction.Triggers>
</Rectangle>
</ControlTemplate>
</ContentControl.Template>
</ContentControl>
<TextBlock TextAlignment="Center" Text="Click the rectangles" />
</StackPanel>
</Grid>
</UserControl>
类文件中没有任何内容:
using System.Windows.Controls;
namespace SLTrigger
{
public partial class MainPage : UserControl
{
public MainPage()
{
InitializeComponent();
}
}
}