本文介绍WPF一种自定义按钮的方法。
实现效果
使用图片做按钮背景;自定义鼠标进入时效果;自定义按压效果;自定义禁用效果
实现效果如下图所示:
实现步骤
创建CustomButton.cs,继承自Button;创建一个资源文件ButtonStyles.xaml;在资源文件中设计按钮的Style;在CustomButton.cs中添加Style中需要的依赖属性;在程序中添加资源并引用(为了方便在不同的程序中引用自定义按钮,自定义按钮放在独立的类库中,应用程序中进行资源合并即可)。
示例代码
// ButtonStyles.xaml<Style x:Key="CustomButton" TargetType="{x:Type local:CustomButton}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:CustomButton}"> <Grid x:Name="container"> <Image Width="{TemplateBinding Width}" Height="{TemplateBinding Height}" Source="{Binding ButtonImage,RelativeSource={RelativeSource Mode=TemplatedParent}}"> <Image.RenderTransformOrigin> <Point X="0.5" Y="0.5"/> </Image.RenderTransformOrigin> <Image.RenderTransform> <ScaleTransform x:Name="scaletrans" ScaleX="1" ScaleY="1"/> </Image.RenderTransform> </Image> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsEnabled" Value="False"> <Setter Property="Opacity" Value="0.5" TargetName="container"/> </Trigger> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Background" Value="#2c000000" TargetName="container"/> </Trigger> <Trigger Property="IsPressed" Value="True"> <Trigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetName="scaletrans" Storyboard.TargetProperty="(ScaleTransform.ScaleX)" To="0.8" Duration="0:0:0.15" AutoReverse="True"/> <DoubleAnimation Storyboard.TargetName="scaletrans" Storyboard.TargetProperty="(ScaleTransform.ScaleY)" To="0.8" Duration="0:0:0.15" AutoReverse="True"/> </Storyboard> </BeginStoryboard> </Trigger.EnterActions> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter></Style>// CustomButton.cspublic class CustomButton : Button{ public ImageSource ButtonImage { get { return (ImageSource)GetValue(ButtonImageProperty); } set { SetValue(ButtonImageProperty, value); } } public static readonly DependencyProperty ButtonImageProperty = DependencyProperty.Register("ButtonImage", typeof(ImageSource), typeof(CustomButton), new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender));}// App.xaml 合并资源<Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source=".../ButtonStyles.xaml"/> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources>// view.xaml 使用<Grid> <customcontrols:CustomButton Width="48" Height="48" Style="{StaticResource CustomButton}" ButtonImage="/Louzi.Paint;component/Images/Toolbar/write.png"/></Grid>
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