Wieso funktioniert der Code nicht

Question

<Window x:Name="WinBasis" x:Class="SupportTool.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:SupportTool"
        mc:Ignorable="d"
        Title="Support-Tool"
        Height="416"
        Width="624"
        ResizeMode="CanMinimize"
        WindowStartupLocation="CenterScreen">
    <Window.Resources>
        <Style x:Key="HitTest" TargetType="Button">
            <Setter Property="OverridesDefaultStyle" Value="True" />
            <Setter Property="Cursor" Value="Hand" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Name="border" BorderThickness="0" BorderBrush="Black" Background="{TemplateBinding Background}">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Opacity" Value="0.8" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="HitTestMenu" TargetType="MenuItem">
            <Setter Property="OverridesDefaultStyle" Value="True" />
            <Setter Property="Cursor" Value="Hand" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="MenuItem">
                        <Border Name="border" BorderThickness="0" BorderBrush="Black" Background="{TemplateBinding Background}">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Opacity" Value="0.8" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <StatusBar x:Name="sbStatus" Margin="0,355,-0.4,-0.6" HorizontalAlignment="Left" Width="618" Height="32" VerticalAlignment="Top" VerticalContentAlignment="Center"/>
        <Menu HorizontalAlignment="Left" Height="74" Margin="72,178,0,0" VerticalAlignment="Top" Width="148">
            <MenuItem Height="30" Width="30" Style="{DynamicResource HitTestMenu}">
                <MenuItem.Background>
                    <ImageBrush ImageSource="C:\Users\Jonas.Sinzinger\Desktop\if_internt_web_technology-02_274895.png" Stretch="Uniform"/>
                </MenuItem.Background>
                <MenuItem Header="_Edit"/>
                <MenuItem Header="_Exit"/>
            </MenuItem>
        </Menu>
    </Grid>
</Window>

Ich hab den oben stehenden Code geschrieben, aber leider öffnet sich das MenuItem nicht, sobald ich den Style anwende. Wie umgehe ich das?

Answer 1

Hi Jonas,
dein Code funktioniert. Die Deckkraft (Opacity) ändert sich. Das kann man einfach prüfen, indem man dem Menü eine Hintergrundfarbe verpasst:

    <Menu HorizontalAlignment="Left" Height="74" Margin="72,178,0,0" 
          VerticalAlignment="Top" Width="148"
           Background="Green">
      <MenuItem Height="30" Width="30" Style="{DynamicResource HitTestMenu}">

---

--
Viele Grüsse
Peter Fleischer (ehem. MVP)
Meine Homepage mit Tipps und Tricks

Answer 2

Hi,

richtig der Style funktioniert. Aber wenn ich den Button anklicke, öffnet sich das Menu nicht das erscheinen soll.

:-(

  <MenuItem Header="_Edit"/>
  <MenuItem Header="_Exit"/>
</MenuItem>

Diese Stelle wird irgendwie nicht ausgeführt. 

Answer 3

Hi Jonas,
in dem von Dir genutztem Style fehlt Einiges. Der Default-Style für ein MenuItem sieht so aus:

        <ControlTemplate x:Key="MenuItemControlTemplate1" TargetType="{x:Type MenuItem}">
            <Border x:Name="templateRoot" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                <Grid VerticalAlignment="Center">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="Auto"/>
                    </Grid.ColumnDefinitions>
                    <ContentPresenter x:Name="Icon" Content="{TemplateBinding Icon}" ContentSource="Icon" HorizontalAlignment="Center" Height="16" Margin="3" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center" Width="16"/>
                    <Path x:Name="GlyphPanel" Data="F1M10,1.2L4.7,9.1 4.5,9.1 0,5.2 1.3,3.5 4.3,6.1 8.3,0 10,1.2z" Fill="{TemplateBinding Foreground}" FlowDirection="LeftToRight" Margin="3" Visibility="Collapsed" VerticalAlignment="Center"/>
                    <ContentPresenter ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" Grid.Column="1" ContentStringFormat="{TemplateBinding HeaderStringFormat}" ContentSource="Header" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    <Popup x:Name="PART_Popup" AllowsTransparency="True" Focusable="False" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" Placement="Bottom">
                        <Border x:Name="SubMenuBorder" BorderBrush="#FF999999" BorderThickness="1" Background="#FFF0F0F0" Padding="2">
                            <ScrollViewer x:Name="SubMenuScrollViewer" Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}">
                                <Grid RenderOptions.ClearTypeHint="Enabled">
                                    <Canvas HorizontalAlignment="Left" Height="0" VerticalAlignment="Top" Width="0">
                                        <Rectangle x:Name="OpaqueRect" Fill="{Binding Background, ElementName=SubMenuBorder}" Height="{Binding ActualHeight, ElementName=SubMenuBorder}" Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                                    </Canvas>
                                    <Rectangle Fill="#FFD7D7D7" HorizontalAlignment="Left" Margin="29,2,0,2" Width="1"/>
                                    <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" Grid.IsSharedSizeScope="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                                </Grid>
                            </ScrollViewer>
                        </Border>
                    </Popup>
                </Grid>
            </Border>
            <ControlTemplate.Triggers>
                <Trigger Property="IsSuspendingPopupAnimation" Value="True">
                    <Setter Property="PopupAnimation" TargetName="PART_Popup" Value="None"/>
                </Trigger>
                <Trigger Property="Icon" Value="{x:Null}">
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsChecked" Value="True">
                    <Setter Property="Visibility" TargetName="GlyphPanel" Value="Visible"/>
                    <Setter Property="Visibility" TargetName="Icon" Value="Collapsed"/>
                </Trigger>
                <Trigger Property="IsHighlighted" Value="True">
                    <Setter Property="Background" TargetName="templateRoot" Value="#3D26A0DA"/>
                    <Setter Property="BorderBrush" TargetName="templateRoot" Value="#FF26A0DA"/>
                </Trigger>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="TextElement.Foreground" TargetName="templateRoot" Value="#FF707070"/>
                    <Setter Property="Fill" TargetName="GlyphPanel" Value="#FF707070"/>
                </Trigger>
                <Trigger Property="CanContentScroll" SourceName="SubMenuScrollViewer" Value="False">
                    <Setter Property="Canvas.Top" TargetName="OpaqueRect" Value="{Binding VerticalOffset, ElementName=SubMenuScrollViewer}"/>
                    <Setter Property="Canvas.Left" TargetName="OpaqueRect" Value="{Binding HorizontalOffset, ElementName=SubMenuScrollViewer}"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>

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--
Viele Grüsse
Peter Fleischer (ehem. MVP)
Meine Homepage mit Tipps und Tricks

Answer 4

Hat geklappt, vielen Dank!