在WPF中隐藏或删除边框的一部分

wixjitnu  于 2023-02-05  发布在  其他
关注(0)|答案(5)|浏览(323)

我想知道如何删除弹出窗口中的一小部分边框。我在图片中用红色箭头标记了我想删除的部分。谢谢你的帮助。
下面是Xaml代码

<ControlTemplate x:Key="{ComponentResourceKey ResourceId=TopLevelHeaderTemplateKey, TypeInTargetAssembly={x:Type MenuItem}}" TargetType="{x:Type MenuItem}">
    <Grid SnapsToDevicePixels="true">
        <Rectangle x:Name="OuterBorder"/>
        <Rectangle x:Name="Bg" Fill="{TemplateBinding Background}" Stroke="{TemplateBinding BorderBrush}"/>
        <Rectangle x:Name="InnerBorder"/>
        <DockPanel>
            <ContentPresenter x:Name="Icon" ContentSource="Icon" Margin="4,0,6,0" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>
            <Path x:Name="GlyphPanel" Data="{StaticResource Checkmark}" Fill="{TemplateBinding Foreground}" FlowDirection="LeftToRight" Margin="7,0,0,0" Visibility="Collapsed" VerticalAlignment="Center"/>
            <ContentPresenter ContentSource="Header" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
        </DockPanel>
        <Popup x:Name="PART_Popup" AllowsTransparency="true" Focusable="false" HorizontalOffset="0" IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}" Placement="Bottom" VerticalOffset="-1">
            <Themes:SystemDropShadowChrome x:Name="Shdw" Color="Transparent">
                <Border x:Name="SubMenuBorder" BorderBrush="{StaticResource ResourceKey=MenuBorderColorBrush}" BorderThickness="1" Background="{StaticResource MenuOpenBackgroundColorBrush}">
                    <ScrollViewer x:Name="SubMenuScrollViewer" Margin="1,0" 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="{StaticResource ResourceKey=MenuOpenBackgroundColorBrush}" Height="{Binding ActualHeight, ElementName=SubMenuBorder}" Width="{Binding ActualWidth, ElementName=SubMenuBorder}"/>
                            </Canvas>
                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Cycle" Grid.IsSharedSizeScope="true" Margin="2" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" KeyboardNavigation.TabNavigation="Cycle"/>
                        </Grid>
                    </ScrollViewer>
                </Border>
            </Themes:SystemDropShadowChrome>
        </Popup>
    </Grid>
    <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="HasDropShadow" SourceName="PART_Popup" Value="true">
            <Setter Property="Margin" TargetName="Shdw" Value="0,0,5,5"/>
            <Setter Property="Color" TargetName="Shdw" Value="#71000000"/>
        </Trigger>
        <Trigger Property="IsHighlighted" Value="true">
            <Setter Property="Fill" TargetName="Bg" Value="{StaticResource MenuMouseOverColorBrush}"/>
            <Setter Property="Stroke" TargetName="OuterBorder" Value="{StaticResource MenuMouseOverColorBrush}"/>
            <Setter Property="Stroke" TargetName="InnerBorder" Value="{StaticResource MenuMouseOverColorBrush}"/>
        </Trigger>
        <Trigger Property="IsKeyboardFocused" Value="true">
            <Setter Property="Stroke" TargetName="Bg" Value="{StaticResource MenuMouseOverColorBrush}"/>
            <Setter Property="Fill" TargetName="Bg" Value="{StaticResource MenuMouseOverColorBrush}"/>
            <Setter Property="Stroke" TargetName="InnerBorder" Value="{StaticResource MenuMouseOverColorBrush}"/>
        </Trigger>
        <Trigger Property="IsSubmenuOpen" Value="true">
            <Setter Property="Stroke" TargetName="Bg" Value="{StaticResource MenuBorderColorBrush}"/>
            <Setter Property="Fill" TargetName="Bg" Value="{StaticResource MenuOpenBackgroundColorBrush}"/>
            <Setter Property="Stroke" TargetName="InnerBorder" Value="{StaticResource MenuBorderColorBrush}"/>
        </Trigger>
        <Trigger Property="IsEnabled" Value="false">
            <Setter Property="Foreground" Value="#FF9A9A9A"/>
            <Setter Property="Fill" TargetName="GlyphPanel" Value="#848589"/>
        </Trigger>
        <Trigger Property="ScrollViewer.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>

wpf

5条答案

按热度按时间
im9ewurl

im9ewurl1#

解决了这个问题，在我想隐藏的部分上方添加了一个额外的边框。在高亮触发器下，我设置了新边框的宽度，这样它就可以匹配标题的宽度。
下面是代码：

<Style x:Key="MetroMenuStyle" TargetType="{x:Type Menu}">
    <Style.Resources>
        <Style x:Key="{x:Static MenuItem.SeparatorStyleKey}" TargetType="Separator">
            <Setter Property="Height" Value="1"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Separator">
                        <Border BorderBrush="{StaticResource MenuBorderColorBrush}" BorderThickness="1" Margin="25,0,0,0"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style TargetType="{x:Type MenuItem}">
            <Setter Property="Foreground" Value="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Menu}}}"/>
            <Setter Property="Command"
                        Value="{Binding Command}" />
            <Setter Property="IsEnabled" Value="{Binding IsEnabled}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type MenuItem}">
                        <!--Border 1-->
                        <Border x:Name="Border"
                                BorderThickness="1" SnapsToDevicePixels="False">
                            <Grid x:Name="Grid">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition x:Name="Col0" MinWidth="17" Width="Auto" 
                                                      SharedSizeGroup="MenuItemIconColumnGroup"/>
                                    <ColumnDefinition Width="Auto" SharedSizeGroup="MenuTextColumnGroup"/>
                                    <ColumnDefinition Width="Auto" SharedSizeGroup="MenuItemIGTColumnGroup"/>
                                    <ColumnDefinition x:Name="Col3" Width="14"/>
                                </Grid.ColumnDefinitions>
                                <ContentPresenter Grid.Column="0" x:Name="Icon" VerticalAlignment="Center" 
                                                  ContentSource="Icon"/>
                                <ContentPresenter Grid.Column="1" Margin="{TemplateBinding Padding}" 
                                                  x:Name="HeaderHost" RecognizesAccessKey="True" 
                                                  ContentSource="Header" VerticalAlignment="Center"/>
                                <ContentPresenter Grid.Column="2" Margin="8,1,8,1" x:Name="IGTHost" 
                                                  ContentSource="InputGestureText" VerticalAlignment="Center"/>
                                <Grid Grid.Column="3" Margin="4,0,6,0" x:Name="ArrowPanel" VerticalAlignment="Center">
                                    <Path x:Name="ArrowPanelPath" HorizontalAlignment="Right" VerticalAlignment="Center" 
                                          Fill="{TemplateBinding Foreground}" Data="M0,0 L0,8 L4,4 z"/>
                                </Grid>
                                <Popup IsOpen="{Binding Path=IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}" 
                                       Placement="Right" HorizontalOffset="-1" x:Name="SubMenuPopup" Focusable="false"
                                       PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}"
                                       AllowsTransparency="True">
                                    <Grid Margin="0,0,5,5">
                                        <!--Border 2-->
                                        <Border x:Name="SubMenuBorder" 
                                                BorderBrush="{StaticResource MenuBorderColorBrush}"
                                                BorderThickness="1" Background="{StaticResource MenuOpenBackgroundColorBrush}" 
                                                SnapsToDevicePixels="True">
                                            <Grid x:Name="SubMenu" Grid.IsSharedSizeScope="True" Margin="2">
                                                <StackPanel IsItemsHost="True" 
                                                            KeyboardNavigation.DirectionalNavigation="Cycle"/>
                                            </Grid>
                                            <Border.Effect>
                                                <DropShadowEffect ShadowDepth="2" Color="Black"/>
                                            </Border.Effect>
                                        </Border>
                                        <!--Border 3-->
                                        <Border Margin="1,0,0,0" x:Name="TransitionBorder" Width="0" Height="2" 
                                                VerticalAlignment="Top" HorizontalAlignment="Left" 
                                                Background="{StaticResource MenuOpenBackgroundColorBrush}" SnapsToDevicePixels="False"
                                                BorderThickness="1" BorderBrush="{StaticResource MenuOpenBackgroundColorBrush}"/>
                                    </Grid>
                                </Popup>
                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="Role" Value="TopLevelHeader">
                                <Setter Property="Padding" Value="6,0,6,2"/>
                                <Setter TargetName="SubMenuPopup" Property="Placement" Value="Bottom"/>
                                <Setter TargetName="Col0" Property="MinWidth" Value="0"/>
                                <Setter TargetName="Col3" Property="Width" Value="Auto"/>
                                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed"/>
                                <Setter TargetName="IGTHost" Property="Visibility" Value="Collapsed" />
                                <Setter TargetName="ArrowPanel" Property="Visibility" Value="Collapsed"/>
                                <Setter TargetName="SubMenuBorder" Property="BorderThickness" Value="1,1,1,1"/>
                                <Setter TargetName="SubMenu" Property="Margin" Value="2,3,2,2"/>
                                <Setter TargetName="TransitionBorder" Property="Width" Value="{Binding ActualWidth, ElementName=Grid}"/>
                            </Trigger>
                            <Trigger Property="Role" Value="TopLevelItem">
                                <Setter Property="Padding" Value="6,0,6,2"/>
                                <Setter TargetName="Col0" Property="MinWidth" Value="0"/>
                                <Setter TargetName="Col3" Property="Width" Value="Auto"/>
                                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed"/>
                                <Setter TargetName="IGTHost" Property="Visibility" Value="Collapsed"/>
                                <Setter TargetName="ArrowPanel" Property="Visibility" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="Role" Value="SubmenuHeader">
                                <Setter Property="DockPanel.Dock" Value="Top"/>
                                <Setter Property="Padding" Value="10,3,0,3"/>
                                <Setter TargetName="Border" Property="MinHeight" Value="22"/>
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource MenuOpenBackgroundColorBrush}"/>
                            </Trigger>
                            <Trigger Property="Role" Value="SubmenuItem">
                                <Setter Property="DockPanel.Dock" Value="Top"/>
                                <Setter Property="Padding" Value="10,3,0,3"/>
                                <Setter TargetName="Border" Property="MinHeight" Value="22"/>
                                <Setter TargetName="ArrowPanel" Property="Visibility" Value="Collapsed"/>
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource MenuOpenBackgroundColorBrush}"/>
                            </Trigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsHighlighted" Value="true"/>
                                    <Condition Property="Role" Value="TopLevelHeader"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource MenuMouseOverColorBrush}"/>
                            </MultiTrigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsHighlighted" Value="true"/>
                                    <Condition Property="Role" Value="TopLevelItem"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="Border" Property="Background" Value="Green"/>
                            </MultiTrigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsHighlighted" Value="true"/>
                                    <Condition Property="Role" Value="SubmenuHeader"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource MenuMouseOverColorBrush}"/>
                            </MultiTrigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsHighlighted" Value="true"/>
                                    <Condition Property="Role" Value="SubmenuItem"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource MenuMouseOverColorBrush}"/>
                            </MultiTrigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsSubmenuOpen" Value="true"/>
                                    <Condition Property="Role" Value="TopLevelHeader"/>
                                </MultiTrigger.Conditions>
                                <Setter TargetName="Border" Property="Background" Value="{StaticResource MenuOpenBackgroundColorBrush}"/>
                                <Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource MenuBorderColorBrush}"/>
                                <Setter TargetName="Border" Property="BorderThickness" Value="1,1,1,0"/>
                            </MultiTrigger>
                            <Trigger Property="IsSubmenuOpen" Value="true">
                                <Setter TargetName="ArrowPanelPath" Property="Fill" Value="Black"/>
                            </Trigger>
                            <Trigger Property="IsSuspendingPopupAnimation" Value="true">
                                <Setter TargetName="SubMenuPopup" Property="PopupAnimation" Value="None"/>
                            </Trigger>
                            <Trigger Property="Icon" Value="{x:Null}">
                                <Setter TargetName="Icon" Property="Visibility" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="False">
                                <Setter Property="Foreground" Value="Red"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Style.Resources>
    <Setter Property="Background" Value="{StaticResource WindowBackgroundColorBrush}"/>
</Style>
赞(0）分享  回复(0）举报  2023-02-05
yqkkidmi

yqkkidmi2#

我试过用简单的方法但是没有成功，抱歉。这很棘手，主要是因为在WPF菜单控件中，弹出控件是在引擎盖下实现的，而它又是一种单独的最顶层窗口，你不能只是将它的Canvas.ZIndex更改为负值，然后在它上面绘制顶级菜单元素，这样结果重叠就可以隐藏你想要删除的行。
一个可能的（也是可行的，恕我直言）消除你在图像上标记的线的方法可能是在菜单项控件模板中添加某种额外的顶层矩形，它只会隐藏弹出菜单顶部边框的左侧部分。然而，这个矩形需要得到顶层菜单项的确切宽度（可能通过元素绑定），这样它才能隐藏你在图像上标记的线的确切数量。
尽管如此，这种可能的解决方案对我来说听起来有点过于复杂，如果可能的话，我宁愿从根本上改变菜单的实现方式，例如，使用选项卡控件来保存子菜单项的所有列表，并且选项卡标题将形成顶级菜单或类似的内容。这样你将至少有更多的控制UI布局，并添加一些不错的动画打开和关闭菜单将很容易。

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c86crjj0

c86crjj03#

您可以使用ControlTemplate for MenuItem自定义此样式。

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dl5txlt9

dl5txlt94#

Tan，我在TopLevelHeaderTemplateKey或SubmenuHeaderTemplateKey中使用下面的xaml代码来自定义弹出框：

<Grid
                SnapsToDevicePixels="true">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition
                            MinWidth="14"
                            Width="Auto" />
                        <ColumnDefinition
                            Width="4" />
                        <ColumnDefinition
                            Width="*" />
                        <ColumnDefinition
                            Width="37" />
                        <ColumnDefinition
                            SharedSizeGroup="MenuItemIGTColumnGroup"
                            Width="Auto" />
                        <ColumnDefinition
                            Width="17" />
                    </Grid.ColumnDefinitions>
                    <ContentPresenter
                        x:Name="Icon"
                        ContentSource="Icon"
                        Margin="1"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                        VerticalAlignment="Center" />
                    <Border
                        x:Name="GlyphPanel"
                        BorderBrush="#CDD3E6"
                        BorderThickness="1"
                        Background="#E6EFF4"
                        CornerRadius="3"
                        Height="22"
                        Margin="1"
                        Visibility="Hidden"
                        Width="Auto">
                        <Path
                            x:Name="Glyph"
                            Data="{DynamicResource Checkmark}"
                            Fill="#0C12A1"
                            FlowDirection="LeftToRight"
                            Height="11"
                            Width="9" />
                    </Border>
                    <ContentPresenter
                        Grid.Column="2"
                        Margin="-2,0,0,0"
                        VerticalAlignment="Center"
                        ContentSource="Header"
                        RecognizesAccessKey="True"
                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    <TextBlock
                        Grid.Column="4"
                        Margin="{TemplateBinding Padding}"
                        Text="{TemplateBinding InputGestureText}"
                        Visibility="Collapsed" />
                    <Path
                        Grid.Column="5"
                        Data="{DynamicResource Checkmark}"
                        Fill="{TemplateBinding Foreground}"
                        Margin="4,0,0,0"
                        VerticalAlignment="Center" />
                </Grid>

                <Popup
                    x:Name="PART_Popup"
                    AllowsTransparency="true"
                    Focusable="false"
                    IsOpen="{Binding IsSubmenuOpen, RelativeSource={RelativeSource TemplatedParent}}"
                    PopupAnimation="{DynamicResource {x:Static SystemParameters.MenuPopupAnimationKey}}"
                    Placement="Right"
                    >
                    <Border
                        x:Name="Shdw"
                        Background="{Binding Background, RelativeSource={RelativeSource AncestorType={x:Type ContextMenu}}}"
                        BorderBrush="#BF000000"
                        BorderThickness="4"
                        CornerRadius="0">
                        <Border.Effect>
                            <DropShadowEffect
                                ShadowDepth="0"
                                BlurRadius="4"
                                Color="#7F1E1E1E" />
                        </Border.Effect>

                        <ScrollViewer
                            x:Name="SubMenuScrollViewer"
                            CanContentScroll="true"
                            Style="{DynamicResource {ComponentResourceKey ResourceId=MenuScrollViewer, TypeInTargetAssembly={x:Type FrameworkElement}}}">
                            <Grid
                                RenderOptions.ClearTypeHint="Enabled">
                                <ItemsPresenter
                                    x:Name="ItemsPresenter"
                                    KeyboardNavigation.DirectionalNavigation="Cycle"
                                    Grid.IsSharedSizeScope="true"
                                    Margin="0"
                                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                    KeyboardNavigation.TabNavigation="Cycle" />
                            </Grid>
                        </ScrollViewer>
                    </Border>
                </Popup>
            </Grid>
            <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="HasDropShadow"
                    SourceName="PART_Popup"
                    Value="true">
                    <Setter
                        Property="Margin"
                        TargetName="Shdw"
                        Value="0,0,5,5" />
                </Trigger>

                <Trigger
                    Property="IsEnabled"
                    Value="false">
                    <Setter
                        Property="Foreground"
                        Value="#FF9A9A9A" />
                    <Setter
                        Property="Background"
                        TargetName="GlyphPanel"
                        Value="#EEE9E9" />
                    <Setter
                        Property="BorderBrush"
                        TargetName="GlyphPanel"
                        Value="#DBD6D6" />
                    <Setter
                        Property="Fill"
                        TargetName="Glyph"
                        Value="#848589" />
                </Trigger>
            </ControlTemplate.Triggers>

屏幕截图如下：

@

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j91ykkif

j91ykkif5#

使用BorderThickness="0,0,0,0"与Padding或Margin相同。我的示例是BorderThickness="2,2,0,2"，用于删除右边框。请记住顺序是“左”、“上”、“右”、“下”。

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