wpf menuitem style.trigger
问题描述:
我试图实现一个可检查的菜单,其中一次只检查一个菜单项,即单选按钮的行为。我想用一个样式和数据触发器来实现它,以保持它在xaml中。目的是观察其他项目;每当其他任何事情都是真的时,它应该被设置为假。的确,每次只检查一个,但是需要两次按钮按下。我怎样才能使它只需按一下按钮?wpf menuitem style.trigger
<MenuItem Header="Header">
<MenuItem x:Name="ChangesMenuItem" Header="Changes" IsCheckable="True" Command="{Binding ViewChangesCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=SettingsMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=SyncMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SettingsMenuItem" Header="Settings" IsCheckable="True" Command="{Binding ViewSettingsCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ChangesMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=SyncMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SyncMenuItem" Header="Sync" IsCheckable="True" Command="{Binding ViewSyncCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=ChangesMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=SettingsMenuItem, Path=IsChecked}" Value="True">
<Setter Property="IsChecked" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
</MenuItem>
答
我有一个标题根据选择而改变,所以我决定绑定到该属性。
<Menu>
<MenuItem Header="{Binding Header}">
<MenuItem x:Name="ChangesMenuItem" Header="Changes" IsCheckable="True" Command="{Binding ViewChangesCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Setter Property="IsChecked" Value="False"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Header}" Value="Changes">
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SettingsMenuItem" Header="Settings" IsCheckable="True" Command="{Binding ViewSettingsCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Setter Property="IsChecked" Value="False"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Header}" Value="Settings">
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
<MenuItem x:Name="SyncMenuItem" Header="Sync" IsCheckable="True" Command="{Binding ViewSyncCommand}">
<MenuItem.Style>
<Style TargetType="MenuItem">
<Setter Property="IsChecked" Value="False"/>
<Style.Triggers>
<DataTrigger Binding="{Binding Header}" Value="Sync">
<Setter Property="IsChecked" Value="True"/>
</DataTrigger>
</Style.Triggers>
</Style>
</MenuItem.Style>
</MenuItem>
</MenuItem>
</Menu>