WPF 三态图像按钮

Question

有没有人有任何创建三态图像按钮的指针？

我有以下内容，但我真正想做的是拥有一个具有多个 ImageSource 属性的控件，例如 <Controls.TristateButton Image="" HoverImage="" PressedImage="" />

<Style TargetType="{x:Type Button}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <StackPanel Orientation="Horizontal" >
                    <Image Name="PART_Image" Source="path to normal image" />
                </StackPanel>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="Source" Value="path to mouse over image" TargetName="PART_Image"/>
                    </Trigger>
                    <Trigger Property="IsPressed" Value="True">
                        <Setter Property="Source" Value="path to pressed image" TargetName="PART_Image"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Answer 1

我自己也遇到了同样的问题。我在这里创建了一个开源项目 http://imagebuttonwpf.codeplex.com您可以在其中获取最新版本的图像按钮。
我不喜欢提供的“已接受”的解决方案，原因有几个(虽然它是一个更轻的解决方案并且有自己的优势)

Blockquote The accepted answer to this StackOverflow question shows an easy way to do this: WPF - How to create image button with template

主要是我不认为为您想要更改图像的每个按钮覆盖控件模板是正确的，因此我创建了一个名为 ImageButton 的自定义控件。它从按钮扩展以具有它的任何功能(尽管它可以很容易地从内容控件扩展)，但还包含一个图像，可以在不重写整个控件模板的情况下对其进行样式设置。
我不喜欢每次都为我的按钮重写整个控件模板的另一个原因是我的基本按钮样式包含多个边框和动画效果，用于鼠标悬停、按下等。每次重写这些显然有其自身的冗余问题。
无论如何这里是 ImageButton 类

public class ImageButton : Button
{
static ImageButton() {
  DefaultStyleKeyProperty.OverrideMetadata(typeof(ImageButton), new FrameworkPropertyMetadata(typeof(ImageButton)));
}

#region Dependency Properties

public double ImageSize
{
  get { return (double)GetValue(ImageSizeProperty); }
  set { SetValue(ImageSizeProperty, value); }
}

public static readonly DependencyProperty ImageSizeProperty =
    DependencyProperty.Register("ImageSize", typeof(double), typeof(ImageButton),
    new FrameworkPropertyMetadata(30.0, FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));

public string NormalImage
{
  get { return (string)GetValue(NormalImageProperty); }
  set { SetValue(NormalImageProperty, value); }
}

public static readonly DependencyProperty NormalImageProperty =
    DependencyProperty.Register("NormalImage", typeof(string), typeof(ImageButton),
    new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender,ImageSourceChanged));

public string HoverImage
{
  get { return (string)GetValue(HoverImageProperty); }
  set { SetValue(HoverImageProperty, value); }
}

public static readonly DependencyProperty HoverImageProperty =
    DependencyProperty.Register("HoverImage", typeof(string), typeof(ImageButton),
    new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));

public string PressedImage
{
  get { return (string)GetValue(PressedImageProperty); }
  set { SetValue(PressedImageProperty, value); }
}

public static readonly DependencyProperty PressedImageProperty =
    DependencyProperty.Register("PressedImage", typeof(string), typeof(ImageButton),
    new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));

public string DisabledImage
{
  get { return (string)GetValue(DisabledImageProperty); }
  set { SetValue(DisabledImageProperty, value); }
}

public static readonly DependencyProperty DisabledImageProperty =
    DependencyProperty.Register("DisabledImage", typeof(string), typeof(ImageButton),
    new FrameworkPropertyMetadata("", FrameworkPropertyMetadataOptions.AffectsRender, ImageSourceChanged));

private static void ImageSourceChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
  Application.GetResourceStream(new Uri("pack://application:,,," + (string) e.NewValue));
}

#endregion

接下来，我们需要为我们的按钮提供一个默认的控件模板，我从这个按钮中取出了我的大部分边框等，这样你就可以看到它在我们所有的样式中都是继承的

<ControlTemplate x:Key="ImageButtonTemplate" TargetType="{x:Type Controls:ImageButton}">   
<Grid x:Name="Grid">
  <Border x:Name="Background" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="3" />
  <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
    <Image x:Name="ButtonImage" Source="{Binding NormalImage, RelativeSource={RelativeSource TemplatedParent}}" 
           Height="{Binding ImageSize, RelativeSource={RelativeSource TemplatedParent}}" 
           Width="{Binding ImageSize, RelativeSource={RelativeSource TemplatedParent}}"/>
    <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True" />
  </StackPanel>      
</Grid>
<ControlTemplate.Triggers>
  <Trigger Property="IsMouseOver" Value="true">
    <Setter TargetName="ButtonImage" Property="Source" Value="{Binding HoverImage, RelativeSource={RelativeSource TemplatedParent}}" />
  </Trigger>
  <Trigger Property="IsPressed" Value="true">
    <Setter TargetName="ButtonImage" Property="Source" Value="{Binding PressedImage, RelativeSource={RelativeSource TemplatedParent}}" />
  </Trigger>
  <Trigger Property="IsEnabled" Value="false">
    <Setter TargetName="ButtonImage" Property="Source" Value="{Binding DisabledImage, RelativeSource={RelativeSource TemplatedParent}}" />
  </Trigger>
</ControlTemplate.Triggers>

那么当然我们需要为我们的新图像按钮设置默认样式

<Style TargetType="{x:Type Controls:ImageButton}" BasedOn="{x:Null}">
<Setter Property="Template" Value="{StaticResource ImageButtonTemplate}" />
</Style>

当然，使用这种方法的好处是我创建了一个基于父样式的样式，它使用 Setter 来更改依赖项属性(而不是需要覆盖控件模板 - 目标)

<Style x:Key="TestImageButton" TargetType="{x:Type Controls:ImageButton}" BasedOn="{StaticResource {x:Type Controls:ImageButton}}">
<Setter Property="NormalImage" Value="/ImageButton;component/Resources/clear.png"/>
<Setter Property="HoverImage"  Value="/ImageButton;component/Resources/clear_green.png" />
<Setter Property="PressedImage" Value="/ImageButton;component/Resources/clear_darkgreen.png" />
<Setter Property="DisabledImage" Value="/ImageButton;component/Resources/clear_grey.png" />
</Style>

最后这意味着可以用几种不同的方式声明按钮，或者在 XAML 中声明图像路径

<Controls:ImageButton 
    Content="Test Button 1" 
    NormalImage="/ImageButton;component/Resources/edit.png"
    HoverImage="/ImageButton;component/Resources/edit_black.png"
    PressedImage="/ImageButton;component/Resources/edit_darkgrey.png"
    DisabledImage="/ImageButton;component/Resources/edit_grey.png"/>

或者使用样式

  <Controls:ImageButton 
    Content="Test Button 2"
    Style="{DynamicResource TestImageButton}"/>

希望能帮助到你