我正在为 WPF 应用程序编写自定义控件。我想Storyboard
在VisualState
定义中使用彩色动画。该To
动画的属性应该绑定到我的控件对象的依赖属性。这似乎不起作用。
我在 Silverlight 论坛中发现了一个线程,描述了完全相同的问题,其中声称这在 SL4 RTM 中有效:http ://forums.silverlight.net/forums/p/174655/423324.aspx 。但是,当我尝试使用 VS2010 WPF 应用程序中发布的代码时,它不起作用,这意味着颜色不会改变。我能够在 a 中做的唯一绑定VisualState
Storyboard
是 to StaticResource
。
有任何想法吗?
编辑:
添加了代码片段:
来自 Generic.xaml:
<Style TargetType="{x:Type local:TestCustomControl}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:TestCustomControl}">
<Border BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Name="MyBorder">
<Border.Background>
<SolidColorBrush Color="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=ColdColor}" />
</Border.Background>
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal"/>
<VisualState x:Name="MouseOver">
<Storyboard>
<!-- This works: -->
<!--<ColorAnimation Storyboard.TargetProperty="Background.Color" Storyboard.TargetName="MyBorder" To="Red" Duration="0:0:0.2"/>-->
<!-- This also works: -->
<!--<ColorAnimation Storyboard.TargetProperty="Background.Color" Storyboard.TargetName="MyBorder" To="{StaticResource HotColorRes}" Duration="0:0:0.2"/>-->
<!-- This doesn't work: -->
<ColorAnimation Storyboard.TargetProperty="Background.Color" Storyboard.TargetName="MyBorder" To="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=HotColor}" Duration="0:0:0.2"/>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
TestCustomControl.cs:
public class TestCustomControl : Button
{
static TestCustomControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(TestCustomControl), new FrameworkPropertyMetadata(typeof(TestCustomControl)));
}
public Color HotColor
{
get { return (Color)GetValue(HotColorProperty); }
set { SetValue(HotColorProperty, value); }
}
// Using a DependencyProperty as the backing store for HotColor. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HotColorProperty =
DependencyProperty.Register("HotColor", typeof(Color), typeof(TestCustomControl), new UIPropertyMetadata(Colors.Aqua));
public Color ColdColor
{
get { return (Color)GetValue(ColdColorProperty); }
set { SetValue(ColdColorProperty, value); }
}
// Using a DependencyProperty as the backing store for ColdColor. This enables animation, styling, binding, etc...
public static readonly DependencyProperty ColdColorProperty =
DependencyProperty.Register("ColdColor", typeof(Color), typeof(TestCustomControl), new UIPropertyMetadata(Colors.Aqua));
}