动画图像按钮

Question

我需要有关我已经使用了一段时间的自定义“图像按钮”的帮助。它工作得很好，但我不知道如何用这三种状态（正常、鼠标悬停、按下）对按钮进行动画处理：

1. 正常到 MouseOver
2. 、MouseOver 到按下

我对 XAML 不太熟练，所以我无法弄清楚。无论如何，这是我一直在使用的代码：

<Button Height="40" HorizontalAlignment="Left" IsEnabled="True" IsHitTestVisible="True" Margin="262,219,0,0" Name="home_btn" VerticalAlignment="Top" Width="89">
    <Button.Template>
        <ControlTemplate TargetType="{x:Type Button}">
            <Grid>
                <Image Name="Normal" Source="normal.png" />
                <Image Name="Hover" Source="hover.png" Visibility="Hidden" />
                <Image Name="Pressed" Source="pressed.png" Visibility="Hidden" />
            </Grid>
            <ControlTemplate.Triggers>
                <Trigger Property="ButtonBase.IsPressed" Value="True">
                    <Setter Property="UIElement.Visibility" TargetName="Normal" Value="Hidden" />
                    <Setter Property="UIElement.Visibility" TargetName="Pressed" Value="Visible" />
                </Trigger>
                <Trigger Property="UIElement.IsMouseOver" Value="True">
                    <Setter Property="UIElement.Visibility" TargetName="Normal" Value="Hidden" />
                    <Setter Property="UIElement.Visibility" TargetName="Hover" Value="Visible" />
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
    </Button.Template>
</Button>

任何答案都会受到赞赏。

Answer 1

完成动画的另一种方法是使用触发器，就像结合 故事板

这是一些示例代码（集成在您发布的代码中）：

 <Button Height="40" HorizontalAlignment="Left" IsEnabled="True" IsHitTestVisible="True" Margin="262,219,0,0" Name="home_btn" VerticalAlignment="Top" Width="89">
<Button.Template>
    <ControlTemplate TargetType="{x:Type Button}">
        <Grid>
            <Image Name="Normal" Source="normal.png" />
            <Image Name="Hover" Source="hover.png" Opacity="0"/>
            <Image Name="Pressed" Source="pressed.png" Opacity="0" />
        </Grid>
        <ControlTemplate.Resources>
            <Storyboard x:Key="MouseDownTimeLine">
                <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="Pressed" Storyboard.TargetProperty="Opacity">
                    <SplineDoubleKeyFrame KeyTime="00:00:00.05" Value="1"/>
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>
            <Storyboard x:Key="MouseUpTimeLine">
                <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="Pressed" Storyboard.TargetProperty="Opacity">
                    <SplineDoubleKeyFrame KeyTime="00:00:00.25" Value="0"/>
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>
            <Storyboard x:Key="MouseEnterTimeLine">
                <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="Hover" Storyboard.TargetProperty="Opacity">
                    <SplineDoubleKeyFrame KeyTime="00:00:00.25" Value="1"/>
                </DoubleAnimationUsingKeyFrames>
            </Storyboard>
            <Storyboard x:Key="MouseExitTimeLine">
                <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="Hover" Storyboard.TargetProperty="Opacity">
                    <SplineDoubleKeyFrame KeyTime="00:00:00.25" Value="0"/>
                </DoubleAnimationUsingKeyFrames>
             </Storyboard>
        </ControlTemplate.Resources>
        <ControlTemplate.Triggers>
            <Trigger Property="ButtonBase.IsPressed" Value="True">
               <Trigger.EnterActions>
                   <BeginStoryboard Storyboard="{StaticResource MouseDownTimeLine}"/>
               </Trigger.EnterActions>
               <Trigger.ExitActions>
                   <BeginStoryboard Storyboard="{StaticResource MouseUpTimeLine}"/>
               </Trigger.ExitActions>
            </Trigger>
            <Trigger Property="UIElement.IsMouseOver" Value="True">
                <Trigger.EnterActions>
                    <BeginStoryboard Storyboard="{StaticResource MouseEnterTimeLine}"/>
                </Trigger.EnterActions>
                <Trigger.ExitActions>
                    <BeginStoryboard Storyboard="{StaticResource MouseExitTimeLine}"/>
                </Trigger.ExitActions>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
</Button.Template>

Answer 2

您可能应该使用 VisualStateManager 对于此类事情，请参阅其文档以获取使用示例。