Silverlight 4 - 当使用隐式按钮样式聚焦时,如何更改按钮背景颜色？

Question

我在努力实现一些应该是微不足道的事情上遇到了很大的困难.我正在使用全局XAML资源文件中定义的隐式按钮样式.我只想用ColorAnimation 将聚焦按钮的背景颜色更改为红色.我已经尝试了许多不同的组合Storyboard.TargetProperty,Storyboard.TargetName而且没有任何效果.我怎样才能做到这一点？

提前致谢.

<Style TargetType="Button" >
<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="Button">
            <Grid x:Name="grid" RenderTransformOrigin="0.5,0.5">
                <Grid.RenderTransform>
                    <TransformGroup>
                        <ScaleTransform/>
                        <SkewTransform/>
                        <RotateTransform/>
                        <TranslateTransform/>
                    </TransformGroup>
                </Grid.RenderTransform>
                <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="FocusStates">
            <VisualState x:Name="Focused" >
                <Storyboard>
                    <ColorAnimation Storyboard.TargetProperty="(Rectangle.Fill).(SolidColorBrush.Color)" Storyboard.TargetName="Button" From="Green" To="Red" Duration="00:00:01" />
                </Storyboard>
            </VisualState>
            <VisualState x:Name="Unfocused"/>
            </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>
        ...

Answer 1

因为我没有你的风格的其余部分我用两个边框和一个ContentPresenter做了这个.一旦聚焦,这将按钮的背景从绿色变为红色.

<Style TargetType="Button" >
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="Button">
                <Grid x:Name="grid" RenderTransformOrigin="0.5,0.5">
                    <Grid.RenderTransform>
                        <TransformGroup>
                            <ScaleTransform/>
                            <SkewTransform/>
                            <RotateTransform/>
                            <TranslateTransform/>
                        </TransformGroup>
                    </Grid.RenderTransform>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="FocusStates">
                            <VisualState x:Name="Focused">
                                <Storyboard>
                                    <ColorAnimation Storyboard.TargetName="border"
                                                    Storyboard.TargetProperty="(Border.Background).(SolidColorBrush.Color)"
                                                    From="Green"
                                                    To="Red"
                                                    Duration="0:0:1" />
                                </Storyboard>
                            </VisualState>
                            <VisualState x:Name="Unfocused"/>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <Border BorderBrush="Transparent" BorderThickness="1" CornerRadius="4">
                        <Border x:Name="border" Background="White" BorderBrush="Black" BorderThickness="1" CornerRadius="4">
                        </Border>
                    </Border>
                    <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Width="Auto"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>