WPF自定義MenuItem樣式的實現方法

2020-01-24 00:04:50

字體：大中小

來源：轉載

供稿：網友

一、前言

默認的MenuItem樣式比較普通，這次自定義MenuItem的樣式也只是對MenuItem的顏色風格進行變化。需要其他功能的變化，大家可以根據樣式代碼進行擴展。

MenuItem的樣式代碼：

<!--MenuItem-->    <Style TargetType="MenuItem">      <Setter Property="Template">        <Setter.Value>          <ControlTemplate TargetType="MenuItem">            <Grid ToolTip="{TemplateBinding Header}" Height="24" Background="#FBFBFD" Width="{TemplateBinding Width}">              <Grid.ColumnDefinitions>                <ColumnDefinition Width="30" />                <ColumnDefinition Width="*" MinWidth="80"/>              </Grid.ColumnDefinitions>              <Border Background="#EBEBED"/>              <Border x:Name="_border"  Grid.ColumnSpan="2"/>              <Image x:Name="_imgicon" Width="12" Height="12" Stretch="Uniform" Source="{Binding Icon,RelativeSource={RelativeSource TemplatedParent}}" />              <TextBlock Foreground="#2D2D30" Grid.Column="1" Margin="5 0 15 0" VerticalAlignment="Center" x:Name="_txt" Text="{Binding Header,RelativeSource={RelativeSource TemplatedParent}}" />              <Path Visibility="Collapsed" x:Name="_path" Grid.Column="1" HorizontalAlignment="Right" Margin="5 13 5 0"  Data="M0,4 4,0 0,-4 z" Fill="#7E8A92"/>              <Popup Placement="Right" x:Name="SubMenuPopup" AllowsTransparency="True"  Focusable="False" IsOpen="{TemplateBinding IsSubmenuOpen}" >                <ScrollViewer  ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Disabled">                  <Border Background="#ffc787" Name="SubmenuBorder" BorderBrush="LightGray" BorderThickness="1" SnapsToDevicePixels="True"  >                    <StackPanel  IsItemsHost="True"  KeyboardNavigation.DirectionalNavigation="Cycle" />                  </Border>                </ScrollViewer>              </Popup>            </Grid>            <ControlTemplate.Triggers>              <Trigger Property="HasItems" Value="true">                <Setter TargetName="_path" Property="Visibility" Value="Visible"/>              </Trigger>              <Trigger Property="IsMouseOver" Value="true">                <Setter TargetName="_border" Property="Background" Value="#ffc787"/>                <Setter TargetName="_txt" Property="Foreground" Value="White"/>                <Setter TargetName="_path" Property="Fill" Value="White"/>              </Trigger>              <Trigger Property="IsEnabled" Value="false">                <Setter TargetName="_txt" Property="Foreground" Value="Gray"/>              </Trigger>            </ControlTemplate.Triggers>          </ControlTemplate>        </Setter.Value>      </Setter>    </Style>

引用示例：

<Grid>      <Grid.ContextMenu>        <ContextMenu>          <MenuItem Header="菜單一">            <MenuItem Header="子菜單"/>          </MenuItem>          <MenuItem Header="菜單二"></MenuItem>        </ContextMenu>      </Grid.ContextMenu>    </Grid>

顯示效果：