Extended canvas KeyDown event not fired

Question

Hi,

 

In my window I have tabcontainer which includes tabs with my extended canvas.

I tried in few ways add handlers for events (KeyDown, OnPreviewKeyDown etc, AddHandler(...)) on this canvas but event is not fireing. I tried to use Keyboard.Focus method but it still not works. What should I do? I would like to add some canvas connected functionality which needs keyboard.

 

Best regard

MN

Answer 1

This is because the Canvas control is not focusable by default. You can set the Canvas.Focusable to true to achieve this goal. Here is the example.

 

Code Snippet

<Canvas KeyDown="Canvas_KeyDown" PreviewKeyDown="Canvas_PreviewKeyDown"

       Focusable="True" Width="300" Height="300"/>

private void Canvas_KeyDown(object sender, KeyEventArgs e)

{

    Debug.WriteLine("KeyDown");

}

private void Canvas_PreviewKeyDown(object sender, KeyEventArgs e)

{

    Debug.WriteLine("PreviewKeyDown");

}

 

 

Best Regards,

Wei Zhou

Answer 2

 

Ok it works but I moved logic of key down event at canvas container level (TabItem).

 

Best regards

MarN