如何在WPF选项卡控件中创建梯形选项卡 [英] How to create trapezoid tabs in WPF tab control
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问题描述
如何在WPF选项卡控件中创建梯形选项卡?
我想创建看起来像 Google Chrome 中的选项卡或 VS 2008 代码编辑器中的选项卡的非矩形选项卡.
How to create trapezoid tabs in WPF tab control?
I'd like to create non rectangular tabs that look like tabs in Google Chrome or like tabs in code editor of VS 2008.
可以用WPF样式完成还是必须用代码绘制?
Can it be done with WPF styles or it must be drawn in code?
互联网上是否有可用的代码示例?
Is there any example of code available on internet?
有很多示例展示了如何圆角或更改选项卡的颜色，但我找不到任何更改选项卡几何形状的示例，例如这两个示例:
VS 2008 代码编辑器标签
There is lots of examples that show how to round corners or change colors of tabs, but I could not find any that changes geometry of tab like this two examples:
VS 2008 Code Editor Tabs
Google Chrome 标签
这两个例子中的标签不是矩形，而是梯形.
Tabs in this two examples are not rectangles, but trapezes.
推荐答案
我试图在互联网上找到一些控件模板或解决方案来解决这个问题，但我没有找到任何可接受"的解决方案.所以我用我的方式写了它，这是我第一次(和最后=))尝试这样做的一个例子:
I tried to find some control templates or solutions for this problem on internet, but I didn’t find any "acceptable" solution for me. So I wrote it in my way and here is an example of my first (and last=)) attempt to do it:
<Window x:Class="TabControlTemplate.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:src="clr-namespace:TabControlTemplate"
Title="Window1" Width="600" Height="400">
<Window.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
<GradientStop Color="#FF3164a5" Offset="1"/>
<GradientStop Color="#FF8AAED4" Offset="0"/>
</LinearGradientBrush>
</Window.Background>
<Window.Resources>
<src:ContentToPathConverter x:Key="content2PathConverter"/>
<src:ContentToMarginConverter x:Key="content2MarginConverter"/>
<SolidColorBrush x:Key="BorderBrush" Color="#FFFFFFFF"/>
<SolidColorBrush x:Key="HoverBrush" Color="#FFFF4500"/>
<LinearGradientBrush x:Key="TabControlBackgroundBrush" EndPoint="0.5,0" StartPoint="0.5,1">
<GradientStop Color="#FFa9cde7" Offset="0"/>
<GradientStop Color="#FFe7f4fc" Offset="0.3"/>
<GradientStop Color="#FFf2fafd" Offset="0.85"/>
<GradientStop Color="#FFe4f6fa" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="TabItemPathBrush" StartPoint="0,0" EndPoint="0,1">
<GradientStop Color="#FF3164a5" Offset="0"/>
<GradientStop Color="#FFe4f6fa" Offset="1"/>
</LinearGradientBrush>
<!-- TabControl style -->
<Style x:Key="TabControlStyle" TargetType="{x:Type TabControl}">
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TabControl">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Border Grid.Row="1" BorderThickness="2,0,2,2" Panel.ZIndex="2" CornerRadius="0,0,2,2"
BorderBrush="{StaticResource BorderBrush}"
Background="{StaticResource TabControlBackgroundBrush}">
<ContentPresenter ContentSource="SelectedContent"/>
</Border>
<StackPanel Orientation="Horizontal" Grid.Row="0" Panel.ZIndex="1" IsItemsHost="true"/>
<Rectangle Grid.Row="0" Height="2" VerticalAlignment="Bottom"
Fill="{StaticResource BorderBrush}"/>
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- TabItem style -->
<Style x:Key="{x:Type TabItem}" TargetType="{x:Type TabItem}">
<Setter Property="SnapsToDevicePixels" Value="True"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="TabItem">
<Grid x:Name="grd">
<Path x:Name="TabPath" StrokeThickness="2"
Margin="{Binding ElementName=TabItemContent, Converter={StaticResource content2MarginConverter}}"
Stroke="{StaticResource BorderBrush}"
Fill="{StaticResource TabItemPathBrush}">
<Path.Data>
<PathGeometry>
<PathFigure IsClosed="False" StartPoint="1,0"
Segments="{Binding ElementName=TabItemContent, Converter={StaticResource content2PathConverter}}">
</PathFigure>
</PathGeometry>
</Path.Data>
<Path.LayoutTransform>
<ScaleTransform ScaleY="-1"/>
</Path.LayoutTransform>
</Path>
<Rectangle x:Name="TabItemTopBorder" Height="2" Visibility="Visible"
VerticalAlignment="Bottom" Fill="{StaticResource BorderBrush}"
Margin="{Binding ElementName=TabItemContent, Converter={StaticResource content2MarginConverter}}" />
<ContentPresenter x:Name="TabItemContent" ContentSource="Header"
Margin="10,2,10,2" VerticalAlignment="Center"
TextElement.Foreground="#FF000000"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True" SourceName="grd">
<Setter Property="Stroke" Value="{StaticResource HoverBrush}" TargetName="TabPath"/>
</Trigger>
<Trigger Property="Selector.IsSelected" Value="True">
<Setter Property="Fill" TargetName="TabPath">
<Setter.Value>
<SolidColorBrush Color="#FFe4f6fa"/>
</Setter.Value>
</Setter>
<Setter Property="BitmapEffect">
<Setter.Value>
<DropShadowBitmapEffect Direction="302" Opacity="0.4"
ShadowDepth="2" Softness="0.5"/>
</Setter.Value>
</Setter>
<Setter Property="Panel.ZIndex" Value="2"/>
<Setter Property="Visibility" Value="Hidden" TargetName="TabItemTopBorder"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<Grid Margin="20">
<TabControl Grid.Row="0" Grid.Column="1" Margin="5" TabStripPlacement="Top"
Style="{StaticResource TabControlStyle}" FontSize="16">
<TabItem Header="MainTab">
<Border Margin="10">
<TextBlock Text="The quick brown fox jumps over the lazy dog."/>
</Border>
</TabItem>
<TabItem Header="VeryVeryLongTab" />
<TabItem Header="Tab" />
</TabControl>
</Grid>
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
namespace TabControlTemplate
{
public partial class Window1
{
public Window1()
{
InitializeComponent();
}
}
public class ContentToMarginConverter: IValueConverter
{
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return new Thickness(0, 0, -((ContentPresenter)value).ActualHeight, 0);
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
#endregion
}
public class ContentToPathConverter: IValueConverter
{
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
var ps = new PathSegmentCollection(4);
ContentPresenter cp = (ContentPresenter)value;
double h = cp.ActualHeight > 10 ? 1.4 * cp.ActualHeight : 10;
double w = cp.ActualWidth > 10 ? 1.25 * cp.ActualWidth : 10;
ps.Add(new LineSegment(new Point(1, 0.7 * h), true));
ps.Add(new BezierSegment(new Point(1, 0.9 * h), new Point(0.1 * h, h), new Point(0.3 * h, h), true));
ps.Add(new LineSegment(new Point(w, h), true));
ps.Add(new BezierSegment(new Point(w + 0.6 * h, h), new Point(w + h, 0), new Point(w + h * 1.3, 0), true));
return ps;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
#endregion
}
}
我编写的这两个转换器是为了根据其内容调整标签大小.实际上，我根据内容大小制作 Path 对象.如果你不需要各种宽度的标签，你可以使用一些修改过的副本:
These two converters I wrote to adjust tab size to its content. Actually, I making Path object depending on content size. If you don’t need tabs with various widths, you can use some modified copy of this:
<Style x:Key="tabPath" TargetType="{x:Type Path}">
<Setter Property="Stroke" Value="Black"/>
<Setter Property="Data">
<Setter.Value>
<PathGeometry Figures="M 0,0 L 0,14 C 0,18 2,20 6,20 L 60,20 C 70,20 80,0 84,0"/>
</Setter.Value>
</Setter>
</Style>
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