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POTrigger for IsMouseOver on TabItem ContenTemplate
 

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    <p>I have a problem with a TabItem Style and maybe someone of you can help me.</p> <p>Following the Style at issue:</p> <pre><code>&lt;Style x:Key="ChildrenTabItemStyle" TargetType="TabItem"&gt; &lt;Style.Resources&gt; &lt;SolidColorBrush x:Key="ButtonNormalBackground" Color="#FFEAE8E8"/&gt; &lt;LinearGradientBrush x:Key="ButtonOverBackground" EndPoint="0,1" StartPoint="0,0"&gt; &lt;GradientStop Color="#FFFAFAFA" Offset="0"/&gt; &lt;GradientStop Color="#FFE0E0E3" Offset="1"/&gt; &lt;/LinearGradientBrush&gt; &lt;LinearGradientBrush x:Key="ButtonPressedBackground" EndPoint="0,1" StartPoint="0,0"&gt; &lt;GradientStop Color="#FFE0E0E2" Offset="0"/&gt; &lt;GradientStop Color="#FFF8F8F8" Offset="1"/&gt; &lt;/LinearGradientBrush&gt; &lt;SolidColorBrush x:Key="ButtonNormalBorder" Color="#FF969696"/&gt; &lt;Style x:Key="CloseableTabItemButtonStyle" TargetType="{x:Type Button}"&gt; &lt;Setter Property="FocusVisualStyle" Value="{x:Null}"/&gt; &lt;Setter Property="Background" Value="{DynamicResource ButtonNormalBackground}"/&gt; &lt;Setter Property="BorderBrush" Value="Transparent"/&gt; &lt;Setter Property="BorderThickness" Value="2,2,2,0"/&gt; &lt;Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/&gt; &lt;Setter Property="HorizontalContentAlignment" Value="Center"/&gt; &lt;Setter Property="VerticalContentAlignment" Value="Center"/&gt; &lt;Setter Property="Padding" Value="4"/&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type Button}"&gt; &lt;Grid&gt; &lt;Border SnapsToDevicePixels="true" x:Name="Chrome" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="2" Opacity="0" /&gt; &lt;ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/&gt; &lt;/Grid&gt; &lt;ControlTemplate.Triggers&gt; &lt;Trigger Property="IsMouseOver" Value="True"&gt; &lt;Setter Property="Opacity" TargetName="Chrome" Value="1"/&gt; &lt;Setter Property="Background" TargetName="Chrome" Value="{DynamicResource ButtonOverBackground}" /&gt; &lt;/Trigger&gt; &lt;Trigger Property="IsPressed" Value="True"&gt; &lt;Setter Property="Opacity" TargetName="Chrome" Value="1"/&gt; &lt;Setter Property="Background" TargetName="Chrome" Value="{DynamicResource ButtonPressedBackground}" /&gt; &lt;/Trigger&gt; &lt;Trigger Property="IsEnabled" Value="false"&gt; &lt;Setter Property="Foreground" Value="#ADADAD"/&gt; &lt;/Trigger&gt; &lt;/ControlTemplate.Triggers&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; &lt;/Style.Resources&gt; &lt;Setter Property="Height" Value="40"/&gt; &lt;Setter Property="MinWidth" Value="90"/&gt; &lt;Setter Property="FontWeight" Value="Bold"/&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type TabItem}"&gt; &lt;Border Name="Border" Margin="1,-1,-1,-1"&gt; &lt;Grid&gt; &lt;Grid.ColumnDefinitions&gt; &lt;ColumnDefinition Width="*"/&gt; &lt;ColumnDefinition Width="Auto"/&gt; &lt;/Grid.ColumnDefinitions&gt; &lt;ContentPresenter Name="BorderContent" Content="{Binding Path=Header}" VerticalAlignment="Center" HorizontalAlignment="Center"/&gt; &lt;Button x:Name="PART_Close" HorizontalAlignment="Right" Margin="3,0,3,0" VerticalAlignment="Top" Width="16" Height="16" DockPanel.Dock="Right" Style="{DynamicResource CloseableTabItemButtonStyle}" ToolTip="Close Tab" Cursor="Hand" Command="{Binding Path=CloseCommand}" Visibility="Hidden"&gt; &lt;Path x:Name="Path" Stretch="Fill" StrokeThickness="0.5" Stroke="#FF333333" Fill="#FF969696" Data="F1 M 2.28484e-007,1.33331L 1.33333,0L 4.00001,2.66669L 6.66667,6.10352e-005L 8,1.33331L 5.33334,4L 8,6.66669L 6.66667,8L 4,5.33331L 1.33333,8L 1.086e-007,6.66669L 2.66667,4L 2.28484e-007,1.33331 Z " HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/&gt; &lt;/Button&gt; &lt;/Grid&gt; &lt;/Border&gt; &lt;ControlTemplate.Triggers&gt; &lt;Trigger Property="IsMouseOver" Value="True"&gt; &lt;Setter TargetName="Border" Property="BorderBrush" Value="{StaticResource ButtonBorderBrush}"/&gt; &lt;Setter TargetName="Border" Property="BorderThickness" Value="2,2,2,0"/&gt; &lt;Setter TargetName="PART_Close" Property="Visibility" Value="Visible"/&gt; &lt;/Trigger&gt; &lt;Trigger Property="IsSelected" Value="True"&gt; &lt;Setter TargetName="Border" Property="Background" Value="{StaticResource EnvLayout}"/&gt; &lt;Setter Property="Foreground" Value="#FFFFFF"/&gt; &lt;Setter TargetName="PART_Close" Property="Visibility" Value="Visible"/&gt; &lt;/Trigger&gt; &lt;/ControlTemplate.Triggers&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; </code></pre> <p>My problem is focused on IsMouseOver trigger; when a tab is not selected, in fact, this event is fired only when the cursor is over the Header of the TabItem ( defined within the ContentTemplate) and not at any point of the Border.</p> <p>In order to better explain my problem, following some screenshots:</p> <p>When IsMouseOver = true my TabItem must have a gray border and the close button has to appear; as you can see in the following images, this behaviour appens only when my cursor is exactly over the Header:</p> <p><img src="https://i.stack.imgur.com/5EkQJ.jpg" alt="Cursor over the Header"></p> <p><img src="https://i.stack.imgur.com/RH88c.jpg" alt="Curson near the edge of the border"></p> <p>Obviously, when the cursor isn't over the Header,you cannot even select the Tab.</p> <p>How can I solve this problem??</p> <p>Thanks in advance for your help,</p> <p>Deborah</p>
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