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RespondidoExtended canvas KeyDown event not fired

  • sexta-feira, 2 de maio de 2008 17:01Anonymousjtyjtyj Medalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuário
     

    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

Respostas

  • segunda-feira, 5 de maio de 2008 4:51Wei Zhou - MSFTModeradorMedalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuário
     Respondido

    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

Todas as Respostas

  • segunda-feira, 5 de maio de 2008 4:51Wei Zhou - MSFTModeradorMedalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuário
     Respondido

    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

  • terça-feira, 6 de maio de 2008 7:45Anonymousjtyjtyj Medalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuárioMedalhas de usuário
     

     

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

     

    Best regards

    MarN