Question

我对WPF很新，甚至更新于WPF中的动画。我知道有故事板等等。但我正在寻找一个特定的效果，所以我可以从那里工作并修补它。

任何人都可以给我一个关于Image控件MouseDown的简单示例（因为WPF中此控件中没有Click事件）通过漂亮的动画使图像更大吗？

谢谢兄弟。

Answer 1

以下内容将相对于当前大小缩放图像，而不是更改绝对值。这可能更灵活。

<Page xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>
  <Image x:Name="MyImage" Source="c:\myImage.jpg" Width="250" Height="250">
    <Image.RenderTransform>
      <ScaleTransform x:Name="ImageScale" ScaleX="1" ScaleY="1" RenderTransformOrigin="0.5, 0.5"/>
    </Image.RenderTransform>
    <Image.Triggers>
      <EventTrigger RoutedEvent="Image.MouseDown">
        <BeginStoryboard>
          <Storyboard>
            <DoubleAnimation Storyboard.TargetName="ImageScale" Storyboard.TargetProperty="(ScaleTransform.ScaleX)" To="1.5" Duration="0:0:0.25" AutoReverse="True"/>
            <DoubleAnimation Storyboard.TargetName="ImageScale" Storyboard.TargetProperty="(ScaleTransform.ScaleY)" To="1.5" Duration="0:0:0.25" AutoReverse="True"/>
          </Storyboard>
        </BeginStoryboard>
      </EventTrigger>
    </Image.Triggers>
  </Image>
</Page>

Answer 2

这是一个做我认为你想要的例子：

<Window x:Class="WpfApplication.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="600">
    <Window.Resources>
        <Storyboard x:Key="ScaleImageStoryboard">
            <DoubleAnimation Duration="0:0:0.5" From="300" To="400" Storyboard.TargetName="Image" Storyboard.TargetProperty="Height"/>
            <DoubleAnimation Duration="0:0:0.5" From="300" To="400" Storyboard.TargetName="Image" Storyboard.TargetProperty="Width"/>
        </Storyboard>
    </Window.Resources>
    <Grid>
        <Image Name="Image" Source="C:\Users\Public\Pictures\Sample Pictures\Desert.jpg" Stretch="Fill" Width="300" Height="300">
            <Image.Triggers>
                <EventTrigger RoutedEvent="Image.MouseDown">
                    <BeginStoryboard Storyboard="{StaticResource ScaleImageStoryboard}"/>
                </EventTrigger>
            </Image.Triggers>
        </Image>
    </Grid>
</Window>

此处，图像以300x300像素开始。当触发Image.MouseDown事件时，Trigger开始故事板，在半秒的时间内将图像大小更改为400x400。

但是，如果您想要一个暂时影响图像大小但不影响布局的效果，您可以使用：

<Window x:Class="WpfApplication.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="600">
    <Window.Resources>
        <Storyboard x:Key="ScaleImageStoryboard">
            <DoubleAnimation Duration="0:0:0.2" From="1" To="1.2" AutoReverse="True"
                             Storyboard.TargetName="ScaleImage" Storyboard.TargetProperty="ScaleX"/>
            <DoubleAnimation Duration="0:0:0.2" From="1" To="1.2" AutoReverse="True" 
                             Storyboard.TargetName="ScaleImage" Storyboard.TargetProperty="ScaleY"/>
        </Storyboard>
    </Window.Resources>
    <Grid>
        <Image Name="Image" Source="C:\Users\Public\Pictures\Sample Pictures\Desert.jpg" 
               Stretch="Fill" Width="300" Height="300"
               RenderTransformOrigin="0.5, 0.5">
            <Image.RenderTransform>
                <ScaleTransform x:Name="ScaleImage"/>
            </Image.RenderTransform>
            <Image.Triggers>
                <EventTrigger RoutedEvent="Image.MouseDown">
                    <BeginStoryboard Storyboard="{StaticResource ScaleImageStoryboard}"/>
                </EventTrigger>
            </Image.Triggers>
        </Image>
    </Grid>
</Window>

如何通过WPF动画使图像大小增加（给出选择的错觉）？

2 个答案: