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POKeyboard-Problems with WPF UserControl inside WinForms
 

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  1. POKeyboard-Problems with WPF UserControl inside WinForms
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    <p>After a long and fruitless search here, this is my problem. I have a WPF UserControl that I display in a WinForms Form via an ElementHost. The development is almost done, but there are still two minor side effects. </p> <p>First, if I open the ContextMenu, I expected that I can choose the items via the Cursor-Keys Up/Down. But this keypresses seem to be missing. The second is, that, if I query the <em>Keyboard.Modifiers</em> explicitly to determine if the Ctrl-Key is pressed, <em>Keyboard.Modifiers</em> always returns 'None'. I far as I read here, I assume that it has something to do with the Keyboard or Focusstates. I often read here as solution to call <em>Integration.ElementHost.EnableModelessKeyboardInterop(window)</em> but I do not have a WPF-Window, I just have a WPF-UserControl. </p> <p>I created a new simplified project to reduced complexity to a minimum.</p> <p><strong>XAML</strong></p> <pre><code>&lt;UserControl x:Class="UserControl1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" d:DesignHeight="50" d:DesignWidth="300"&gt; &lt;TextBlock Text="This is a Demo-Text"&gt; &lt;TextBlock.ContextMenu&gt; &lt;ContextMenu&gt; &lt;MenuItem Header="First" Click="MenuItem_Click"&gt;&lt;/MenuItem&gt; &lt;MenuItem Header="Second"&gt;&lt;/MenuItem&gt; &lt;/ContextMenu&gt; &lt;/TextBlock.ContextMenu&gt; &lt;/TextBlock&gt; &lt;/UserControl&gt; </code></pre> <p><strong>Code behind</strong></p> <pre><code>Public Class UserControl1 Private Sub MenuItem_Click(sender As System.Object, e As System.Windows.RoutedEventArgs) If Keyboard.Modifiers = ModifierKeys.None Then Debug.WriteLine("Modifiers = None") ' &lt;= I am always here, even if I press Ctrl Else Debug.WriteLine("Modifiers = Not None") End If End Sub End Class </code></pre> <p>I put this Control into an <em>ElementHost</em> inside a WinForms-Window. If I have anything else inside the WinForms-Window (of course I have) that can capture the focus, I still can open the ContextMenu via a right click on the WPF-Control, but pressing the Cursor keys up or down does not select any of the two items. If I click the first item and hold the Ctrl-Key, <em>Keyboard.Modifiers</em> still returns <em>Modifiers.None</em></p>
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    1. COIntegration between WPF and WinForms is not quite water-tight. If you can't convert the WinForms app to WPF, you might be better off figuring out how to meet your needs in a WinForms control (blech).
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      1. USGreg Sansom
    2. CO@GregSansom I try to get rid of WinForms, but it is to much for one step. I eliminated some OwnerDraw inside the replaced ListView control (**choke**) There is no way back ;-)
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    3. COI think you do have a WPF window - the context menu itself...
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      1. USAmittai Shapira
 

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