Getting input from a RadWindow in a WinForms app

[Jason]

I've had a look, but can't see anything about other people having this particular issue.

We have a WPF library that contains a RadWindow with a textbox, requiring user input. 
We then have a WinForms application that creates and show this RadWindow.
When we try to type in the textbox, nothing happens.

If we use a regular WPF window for the dialog, then we can use the ElementHost.EnableModelessKeyboardInterop() function, which makes everything work as expected. However, the RadWindow isn't actually a window, so we can't use this method.

So how do we resolve this issue?

Thanks
Jason

[cmasdev]

Have you tried this:

1.yourRadWindow.Owner = this;

Hope it helps in any way.

Regards.

[Jason]

What type are you expecting this to be?

For a RadWindow, the Owner needs to be a ContentControl. If this is the mainform, then the type is a Windows.Forms, which doesn't work as a RadWindow owner.

[Kalin]

Hello Jason,

RadWindow is hosted in native WPF Window, so you would need to get its host in order enable the keyboard. This should be done after RadWindow is loaded - so you can hook to the Loaded event of get the parent WPF Window as shown below:

void radWind_Loaded(object sender, RoutedEventArgs e)
{
    var radWindow = sender as RadWindow;
    var window = Window.GetWindow(radWindow);
    ElementHost.EnableModelessKeyboardInterop(window);
}

Hope this will work for you.

Regards,
Kalin
Telerik

 

 

[Jason]

Perfect. And something that I'm sure I can use elsewhere.

Thanks

[Jason]

I have a secondary problem relating to this. I am attempting to set the owner of the dialog to the main WinForm, using code similar to 

    var wpfWindow = Window.GetWindow(lclDlg);
    if (wpfWindow != null)
    {
        var helper = new WindowInteropHelper(wpfWindow) { Owner = ownerFrm.Handle };
    }

I have this in the dialog loaded event, since that's when GetWindow actually works. However, the .NET framework then complains that you can't set the owner of a dialog once it's already been shown.

Any solution?

[cmasdev]

Hi Jason, I think that your snippet must be something like this:

//Win32 HWND
var wpfWindow = Window.GetWindow(lclDlg); //getting you actual window
if (wpfWindow != null)
{
    var helper = new WindowInteropHelper(wpfWindow);
    helper.Owner = wpfWindow.Handle; //get your Win32 HWND
    wpfWindow.ShowDialog();
}

//WPF directly
var wpfWindow = Window.GetWindow(YOUR DESIRED WINDOW);
if (wpfWindow != null)
{
    wpfWindow.Owner = App.Current.MainWindow;
    wpfWindow.ShowDialog();
}

Hope it helps.

Regards.

[Jason]

Unfortunately, that doesn't help the Win32 situation.

Window.GetWindow doesn't return anything until you've shown the dialog (from what I can tell), so you can't set the owner. WPF doesn't matter, since you can set a WPF parent on a WPF RadWindow before it's created

[Kalin]

Hello Jason,

Unfortunately you it is not possible to set the owner after the dialog is already shown. However if you display RadWindow using the Show() method you will be able to set it on Loaded.

I hope not using dialog Window will be suitable for you.

Regards,
Kalin
Telerik