我想在我的contextMenu中添加一个scrollviewer,因为我可以有很多(30-40)个子项。
所以我在submenuHeader Template中添加了scrollviewer:
<ControlTemplate
x:Key="{x:Static MenuItem.SubmenuHeaderTemplateKey}"
TargetType="MenuItem">
<Border Name="Border"
BorderBrush="Pink"
Background="Transparent"
Cursor="Hand">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" SharedSizeGroup="Icon"/>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" SharedSizeGroup="Shortcut"/>
<ColumnDefinition Width="13"/>
</Grid.ColumnDefinitions>
<ContentPresenter
Name="Icon"
Margin="6,0,6,0"
VerticalAlignment="Center"
ContentSource="Icon"/>
<ContentPresenter
Name="HeaderHost"
Grid.Column="1"
ContentSource="Header"
RecognizesAccessKey="True"/>
<TextBlock x:Name="InputGestureText"
Grid.Column="2"
Text="{TemplateBinding InputGestureText}"
Foreground="{StaticResource CouleurTexteBouton}"
Margin="5,2,2,2"
DockPanel.Dock="Right"/>
<Path
Grid.Column="3"
Name="CheckMark"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="M 0 0 L 0 7 L 4 3.5 Z"
Fill="{StaticResource CouleurTexteBouton}" />
<Popup
Name="Popup"
Placement="Right"
HorizontalOffset="10"
IsOpen="{TemplateBinding IsSubmenuOpen}"
AllowsTransparency="True"
Focusable="False"
PopupAnimation="Fade">
<Border
Name="SubmenuBorder"
SnapsToDevicePixels="True"
Style="{StaticResource StyleBlocsPopUpWithBorder}"
TextBlock.Foreground="{StaticResource CouleurTexteBouton}">
<ScrollViewer Style="{StaticResource FavsScrollViewer}" VerticalScrollBarVisibility="Auto" Margin="0,5" MaxHeight="400">
<StackPanel
IsItemsHost="True"
KeyboardNavigation.DirectionalNavigation="Cycle" />
</ScrollViewer>
</Border>
</Popup>
</Grid>
</Border>
</ControlTemplate>
scrollviewer工作正常,但如果父级有一个滚动条,则每个级别之间的水平偏移不再起作用(我的级别0只有7个项目,因此没有任何滚动条,因此子项目的水平偏移正常工作。但正如你在屏幕上看到的那样(左边是1级=我的等级0的子项,右边是子项的2级,由于滚动条,水平偏移不起作用。
我该如何解决这个问题?
以下是我的上下文菜单的完整模板/样式:
<Style x:Key="MenuItemStyle" TargetType="MenuItem">
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Background" Value="Transparent" />
<Style.Triggers>
<Trigger Property="Role" Value="TopLevelHeader">
<Setter Property="Template"
Value="{StaticResource {x:Static MenuItem.TopLevelHeaderTemplateKey}}"/>
<Setter Property="Grid.IsSharedSizeScope" Value="true"/>
</Trigger>
<Trigger Property="Role" Value="TopLevelItem">
<Setter Property="Template"
Value="{StaticResource {x:Static MenuItem.TopLevelItemTemplateKey}}"/>
</Trigger>
<Trigger Property="Role" Value="SubmenuHeader">
<Setter Property="Template"
Value="{StaticResource {x:Static MenuItem.SubmenuHeaderTemplateKey}}"/>
</Trigger>
<Trigger Property="Role" Value="SubmenuItem">
<Setter Property="Template"
Value="{StaticResource {x:Static MenuItem.SubmenuItemTemplateKey}}"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="StyleContext" TargetType="ContextMenu">
<Setter Property="SnapsToDevicePixels" Value="True"/>
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Grid.IsSharedSizeScope" Value="true"/>
<Setter Property="HasDropShadow" Value="True"/>
<Setter Property="VerticalOffset" Value="10" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ContextMenu">
<Border
Name="Border"
Width="Auto" >
<StackPanel IsItemsHost="True"
KeyboardNavigation.DirectionalNavigation="Cycle"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="{x:Static MenuItem.SeparatorStyleKey}"
TargetType="Separator">
<Setter Property="Height" Value="1"/>
<Setter Property="Margin" Value="0,4,0,4"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Separator">
<Border BorderBrush="Green"
BorderThickness="1"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- TopLevelHeader -->
<ControlTemplate x:Key="{x:Static MenuItem.TopLevelHeaderTemplateKey}"
TargetType="MenuItem">
<Border Name="Border" Cursor="Hand">
<Grid>
<ContentPresenter
Margin="6,3,6,3"
Name="HeaderHost"
ContentSource="Header"
RecognizesAccessKey="True"
/>
<Popup
Name="Popup"
Placement="Bottom"
IsOpen="{TemplateBinding IsSubmenuOpen}"
AllowsTransparency="True"
Focusable="False"
PopupAnimation="Fade">
<Border
Name="SubmenuBorder"
SnapsToDevicePixels="True"
Background="Blue"
BorderBrush="Yellow"
BorderThickness="2" >
<StackPanel
IsItemsHost="True"
KeyboardNavigation.DirectionalNavigation="Cycle" />
</Border>
</Popup>
</Grid>
</Border>
</ControlTemplate>
<!-- TopLevelItem -->
<ControlTemplate
x:Key="{x:Static MenuItem.TopLevelItemTemplateKey}"
TargetType="MenuItem">
<Border Name="Border" Cursor="Hand" >
<Grid>
<ContentPresenter
Margin="6,3,6,3"
ContentSource="Header"
Name="content_text"
RecognizesAccessKey="True" />
</Grid>
</Border>
</ControlTemplate>
<!-- SubmenuItem
-->
<ControlTemplate
x:Key="{x:Static MenuItem.SubmenuItemTemplateKey}"
TargetType="MenuItem"
>
<Border
Name="Border"
BorderBrush="Transparent"
Background="Transparent"
BorderThickness="0" Cursor="Hand">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" SharedSizeGroup="Icon"/>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" SharedSizeGroup="Shortcut"/>
<ColumnDefinition Width="13"/>
</Grid.ColumnDefinitions>
<ContentPresenter
Name="Icon"
Margin="6,0,6,0"
VerticalAlignment="Center"
ContentSource="Icon"/>
<Border
Name="Check"
Width="13" Height="13"
Visibility="Collapsed"
Margin="6,0,6,0"
Background="Transparent"
BorderThickness="0"
BorderBrush="Transparent">
<Path
Name="CheckMark"
Width="7" Height="7"
Visibility="Hidden"
SnapsToDevicePixels="False"
StrokeThickness="2"
Data="M 0 0 L 7 7 M 0 7 L 7 0" />
</Border>
<ContentPresenter
Name="HeaderHost"
Grid.Column="1"
ContentSource="Header"
RecognizesAccessKey="True"/>
<TextBlock x:Name="InputGestureText"
Grid.Column="2"
Text="{TemplateBinding InputGestureText}"
Margin="5,2,0,2"
DockPanel.Dock="Right" />
</Grid>
</Border>
</ControlTemplate>
谢谢