Bring up ContextMenu when IsMouseOver on a Button using only XAML
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09-02-2021 - |
Domanda
I am trying to use XAML (only, no codebehind) to bring up the ContextMenu of a button.
I have this my button here
<Button x:Name="btn" Style="{StaticResource mybutton}" >
<Button.ContextMenu>
<ContextMenu>
<TextBlock Text="Information"/>
</ContextMenu>
</Button.ContextMenu>
</Button>
The Style for the button here
<Style TargetType="{x:Type Button}" x:Key="mybutton">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="ContextMenu.IsOpen" Value="True"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
My google-fu is failing me for what seems like an easy solution. I really would prefer to avoid using codebehind (MouseEnter/MouseLeave events).
Thank you in advance.
Soluzione
Try to apply "Setter" for a ContextMenu within the ControlTemplate, by providing it's name in the "TargetName" property. For example:
<Button Width="100" Height="100" x:Name="btn">
<Button.Style>
<Style TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border CornerRadius="2" BorderThickness="3" BorderBrush="DarkGray" x:Name="border">
<Border.ContextMenu>
<ContextMenu x:Name="cmenu">
<TextBlock>Information</TextBlock>
</ContextMenu>
</Border.ContextMenu>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="ContextMenu.IsOpen" Value="True" TargetName="cmenu"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Button.Style>
Altri suggerimenti
This is what you want i guess - http://social.msdn.microsoft.com/forums/en-US/wpf/thread/adafe007-9637-4f28-8366-8f14ead2bd75
All you need to do is capture the mouse event that you want to trigger the context menu.
It is best to use a mouse_up event in codebehind. With MouseOver
the user feels fooled as the context menu is gone when the mouse moves towards an entry...
In VB the code looks like:
Private Sub image_MouseUp(sender As Object, e As MouseButtonEventArgs) Handles image.MouseUp
anyControl.ContextMenu.IsOpen = Not OrteListBox.ContextMenu.IsOpen
End Sub
anyCountrol
stands for the sender or any other control that holds the ContextMenu