public void PositionAndShow(Window relativeTo, AppExpandedEventArgs e)
{
var taskbarState = WindowsTaskbar.Current;
var HEADER_SIZE = (double)App.Current.Resources["DeviceTitleCellHeight"];
var ITEM_SIZE = (double)App.Current.Resources["AppItemCellHeight"];
var PopupBorderSize = (Thickness)App.Current.Resources["PopupBorderThickness"];
var volumeListMargin = (Thickness)App.Current.Resources["VolumeAppListMargin"];
DataContext = e.ViewModel;
var contextTheme = (string)relativeTo.TryFindResource("ContextMenuTheme");
_useDarkTheme = contextTheme != null && contextTheme.Equals("DarkOnly");
Point offsetFromWindow = e.Container.TranslatePoint(new Point(0, 0), relativeTo);
// Adjust for the title bar, top border and top margin on the app list.
offsetFromWindow.Y -= (HEADER_SIZE + volumeListMargin.Bottom + PopupBorderSize.Top);
var popupHeight = (HEADER_SIZE + (e.ViewModel.ChildApps.Count * ITEM_SIZE) + volumeListMargin.Bottom + volumeListMargin.Top);
var popupOriginYScreenCoordinates = (relativeTo.PointToScreen(new Point(0, 0)).Y / this.DpiHeightFactor()) + offsetFromWindow.Y;
var scaledWorkArea = new Rect(taskbarState.ContainingScreen.WorkingArea.Left / this.DpiWidthFactor(),
taskbarState.ContainingScreen.WorkingArea.Top / this.DpiHeightFactor(),
taskbarState.ContainingScreen.WorkingArea.Width / this.DpiWidthFactor(),
taskbarState.ContainingScreen.WorkingArea.Height / this.DpiHeightFactor()
);
// If we flow off the bottom
if (popupOriginYScreenCoordinates + popupHeight > scaledWorkArea.Bottom)
{
popupOriginYScreenCoordinates = scaledWorkArea.Bottom - popupHeight;
// If we also flow off the top
if (popupOriginYScreenCoordinates < scaledWorkArea.Top)
{
popupOriginYScreenCoordinates = scaledWorkArea.Top;
popupHeight = scaledWorkArea.Bottom - scaledWorkArea.Top;
}
}
Placement = PlacementMode.Absolute;
HorizontalOffset = (relativeTo.PointToScreen(new Point(0, 0)).X / this.DpiWidthFactor()) + offsetFromWindow.X;
VerticalOffset = popupOriginYScreenCoordinates;
Width = ((FrameworkElement)e.Container).ActualWidth;
Height = popupHeight;
ShowWithAnimation();
}
private void ViewModel_AppExpanded(object sender, AppExpandedEventArgs e)
{
AppPopup.PositionAndShow(this, e);
}
private void ViewModel_AppExpanded(object sender, AppExpandedEventArgs e)
{
Trace.WriteLine("FullWindow ViewModel_AppExpanded");
AppPopup.PositionAndShow(_mainViewModel, this, e);
}