public PopupWindow(Visual parentControl, TreeNodeViewModel viewModel)
{
if (parentControl != null)
{
// Get absolute location on screen of upper left corner of the TextBlock
Point locationFromScreen = parentControl.PointToScreen(new Point(0, 0));
locationFromScreen.Y += 18; // SystemParameters.WindowCaptionHeight;
locationFromScreen.X -= 6; // correction
// Transform screen point to WPF device independent point
PresentationSource source = PresentationSource.FromVisual(parentControl); // this
Point targetPoints = source.CompositionTarget.TransformFromDevice.Transform(locationFromScreen);
Top = targetPoints.Y;
Left = targetPoints.X;
AllowsTransparency = false;
WindowStyle = WindowStyle.None;
ResizeMode = ResizeMode.CanResize;
WindowStartupLocation = WindowStartupLocation.Manual;
}
else
{
WindowStartupLocation = WindowStartupLocation.CenterScreen;
}
SizeToContent = SizeToContent.Manual;
Width = 200;
Height = 300;
viewModel.SelectedItemChanged = new RelayCommand(SelectedItemChangedHandler);
Content = new TreeNodeView()
{
DataContext = viewModel
};
}
private void SelectedItemChangedHandler(object parameter)
{
var args = parameter as RoutedPropertyChangedEventArgs <object>;
if (args == null)
{
return;
}
args.Handled = true;
Result = args.NewValue as TreeNodeViewModel;
this.Close();
}