yep, you can do that--basically all you have to do is make a custom control-template. Check out http://www.switchonthecode.com/tutorials/the-wpf-tab-control-inside-and-out for a tutorial. Just googling "wpf" "tabcontrol" "shape" turns up pages of results.
I have not tried this myself, but you should be able to replace the tag(s) in the template with tags to get the shape that you want.
Start from the MSDN sample tab control control template at: http://msdn.microsoft.com/en-us/library/ms754137.aspx and change it until it looks like you want.
<Grid>
<Grid.Resources>
<Style TargetType="{x:Type TabControl}">
<Setter Property="ItemContainerStyle">
<Setter.Value>
<Style>
<Setter Property="Control.Height" Value="20"></Setter>
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TabItem}">
<Grid Margin="0 0 -10 0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="10">
</ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition Width="10"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Path Data="M10 0 L 0 20 L 10 20 " Fill="{TemplateBinding Background}" Stroke="Black"></Path>
<Rectangle Fill="{TemplateBinding Background}" Grid.Column="1"></Rectangle>
<Rectangle VerticalAlignment="Top" Height="1" Fill="Black" Grid.Column="1"></Rectangle>
<Rectangle VerticalAlignment="Bottom" Height="1" Fill="Black" Grid.Column="1"></Rectangle>
<ContentPresenter Grid.Column="1" ContentSource="Header" />
<Path Data="M0 20 L 10 20 L0 0" Fill="{TemplateBinding Background}" Grid.Column="2" Stroke="Black"></Path>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Trigger.Setters>
<Setter Property="Background" Value="Beige"></Setter>
<Setter Property="Panel.ZIndex" Value="1"></Setter>
</Trigger.Setters>
</Trigger>
<Trigger Property="IsSelected" Value="False">
<Trigger.Setters>
<Setter Property="Background" Value="LightGray"></Setter>
</Trigger.Setters>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Setter.Value>
</Setter>
</Style>
</Grid.Resources>
<TabControl>
<TabItem Header="One" ></TabItem>
<TabItem Header="Two" ></TabItem>
<TabItem Header="Three" ></TabItem>
</TabControl>
</Grid>
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:
<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
}
}
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>
screen:
