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WPF: Focus in a Window and UserControl


By : hoptii
Date : October 16 2020, 11:12 AM
wish of those help I'm trying to get a UserControl to tab properly and am baffled. The logical tree looks like this. , I know this response is quite late... but have you tried:
code :


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How to remove focus from control when window does not have focus?(otherwise it will be restored when window gains focus


By : Arun Bernard
Date : March 29 2020, 07:55 AM
I hope this helps you . Ok, I found the solution that satisfies me:
FocusManager(focusManager).mx_internal::lastFocus = null;
code :
    private function activateWindowHandler(event:Event):void
    {
//        var target:InteractiveObject = InteractiveObject(event.target);
        // trace("FM " + this + " activateWindowHandler ", _lastFocus);

        windowActivated = true;

        if (activated)
        {
            dispatchEvent(new FlexEvent(FlexEvent.FLEX_WINDOW_ACTIVATE));
            // restore focus if this focus manager had last focus
            if (_lastFocus && !browserMode)
                _lastFocus.setFocus();
            lastAction = "ACTIVATE";
        }
    }

Handle Arrow keys in a UserControl to select List Item while the TextBox in UserControl has focus


By : Robert
Date : March 29 2020, 07:55 AM
With these it helps You can override ProcessCmdKey and do what you want.
Assuming you have for example a ListBox in that UserControl:
code :
Protected Overrides Function ProcessCmdKey(ByRef msg As Message, keyData As Keys) As Boolean
    If keyData = Keys.Down Then
        'Perform validations and so on then
        Me.ListBox1.SelectedIndex = Me.ListBox1.SelectedIndex + 1
        Return True
    End If
    Return MyBase.ProcessCmdKey(msg, keyData)
End Function
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
    if (keyData == Keys.Down)
    {
        //Perform validations and so on then
        this.listBox1.SelectedIndex= this.listBox1.SelectedIndex+1;
        return true;
    }
    return base.ProcessCmdKey(ref msg, keyData);
}

WPF Prism Unity Container. Setting keyboard focus on usercontrol or usercontrol grid parent


By : Niklas
Date : March 29 2020, 07:55 AM
hope this fix your issue Either not understanding your question correctly or you should review the basic concepts of MVVM in a WPF implementation.
The View is the WPF controls.

UserControl Focus Issue - Focus() sometimes returns false


By : user3749179
Date : March 29 2020, 07:55 AM
around this issue Calling Focus() on a UserControl selects the first childcontrol of that UserControl. That would indeed explain your behaviour.
You can try to call Select() instead of Focus() and see if that works.

in Qt, what QEvent means loses window focus, regain window focus? (Set transparency)


By : ashish bharti
Date : March 29 2020, 07:55 AM
Hope this helps I agree with Kévin Renella that there are sometimes issues with QWidget::focusInEvent and QWidget::focusOutEvent. Instead, a better approach would be to implement QWidget::changeEvent():
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