如何解决如何在WPF中使用鼠标右键单击事件选择选项卡
我为Tab控件创建了一个上下文菜单,该菜单更改了标签的名称。但是,如果将鼠标悬停在未选择的选项卡上,并在上下文菜单上单击鼠标右键,则会弹出。如果单击菜单项,它将更改所选选项卡的名称。例如,我右键单击“收藏夹4”选项卡并尝试更改其名称,但是它更改了第一个选项卡的名称(选定的选项卡),如下所示。
我想通过单击鼠标右键和选择鼠标左键来选择选项卡,以免引起混淆或不会故意更改选项卡名称。
XAML
<TabControl x:Name="FavoritesTabs" HorizontalAlignment="Stretch" Height="23"
Initialized="FavoritesTabs_Initialized" Margin="8,7,0"
MouseRightButtonDown="FavoritesTabs_MouseRightButtonDown" MouseEnter="FavoritesTabs_MouseEnter" >
<TabControl.ContextMenu>
<ContextMenu Name="tabContextMenu">
<MenuItem Header="Change Tab Name" Click="MenuItem_Click" />
<MenuItem Header="Save Favorite Layers" />
</ContextMenu>
</TabControl.ContextMenu>
</TabControl>
C#
private void FavoritesTabs_Initialized(object sender,EventArgs e)
{
FavoritesList.Add("Favorite 1");
FavoritesList.Add("Favorite 2");
FavoritesList.Add("Favorite 3");
FavoritesList.Add("Favorite 4");
FavoritesTabs.ItemsSource = FavoritesList;
}
private void FavoritesTabs_MouseRightButtonDown(object sender,MouseButtonEventArgs e)
{
}
private void MenuItem.Click(object sender,RoutedEventArgs e)
{
int index = FavoritesTabs.SelectedIndex;
FavoritesList[index] = "New tab";
}
我尝试了this的答案,但是没有用。
解决方法
您必须为TabControl
设置MouseDown
添加事件的样式,然后相应地选择选项卡项。
这是代码:
XAML
首先,您需要定义TabControl
样式的资源,也需要定义Grid
样式的资源。后者是必需的,因为您不能直接在TabControl
样式内定义事件处理程序。
<Window x:Class="WpfApp7.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:WpfApp7"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Window.Resources>
<Style x:Key="GridStyle" TargetType="Grid">
<EventSetter Event="Mouse.MouseDown" Handler="UIElement_OnMouseDown"/>
</Style>
<Style x:Key="TabcontrolStyle" TargetType="{x:Type TabControl}">
<Style.Resources>
<Style TargetType="{x:Type TabItem}">
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid Height="20"
Background="{TemplateBinding Background}"
SnapsToDevicePixels="true"
Style="{StaticResource GridStyle}">
<ContentPresenter Margin="10,0"
HorizontalAlignment="Center"
VerticalAlignment="Center"
ContentSource="Header" >
</ContentPresenter>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="false">
<Setter Property="Background" Value="Transparent" />
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" Value="{x:Static SystemColors.ControlBrush}" />
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter Property="Background" Value="{x:Static SystemColors.ActiveCaptionBrush}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Style.Resources>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabControl}">
<Grid KeyboardNavigation.TabNavigation="Local">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TabPanel Name="HeaderPanel"
Panel.ZIndex="1"
IsItemsHost="True"
KeyboardNavigation.TabIndex="1" />
<ContentPresenter Name="PART_SelectedContentHost"
Margin="10"
Grid.Row="1"
ContentSource="SelectedContent" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid>
<TabControl x:Name="MyTabControl" Style="{StaticResource TabcontrolStyle}">
<TabControl.ContextMenu>
<ContextMenu Name="tabContextMenu">
<MenuItem Header="Change Tab Name" />
<MenuItem Header="Save Favorite Layers" />
</ContextMenu>
</TabControl.ContextMenu>
<TabItem Header="First">First Content</TabItem>
<TabItem Header="Second">Second Content</TabItem>
<TabItem Header="Third">Third Content</TabItem>
</TabControl>
</Grid>
背后的代码
在后面的代码中,您可以等于TabItem
标头以相应地选择TabItem
。
private void UIElement_OnMouseDown(object sender,MouseButtonEventArgs e)
{
ContentPresenter contentPresenter = null;
if (e.Source is Grid)
contentPresenter = (ContentPresenter) ((Grid) e.Source).Children[0];
else if (e.Source is ContentPresenter)
contentPresenter = ((ContentPresenter) e.Source);
if (contentPresenter == null) return;
var header = contentPresenter.Content.ToString();
var selectedIndex = -1;
foreach (var item in this.MyTabControl.Items)
{
selectedIndex++;
var tabItem = item as TabItem;
if (tabItem?.Header != null && tabItem.Header.ToString().Equals(header,StringComparison.InvariantCultureIgnoreCase))
{
this.MyTabControl.SelectedIndex = selectedIndex;
}
}
}
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