/// <summary>
/// Intent: Fetches the parent window, so we can call "DragMove()"on it. Caches the results in a dictionary,
/// so we can apply this same property to multiple XAML elements.
/// </summary>
private static void UIElement_OnMouseMove(object sender, MouseEventArgs mouseEventArgs)
{
try
{
var uiElement = sender as UIElement;
if (uiElement != null)
{
Window window = GetParentWindow(uiElement);
if (mouseEventArgs.LeftButton == MouseButtonState.Pressed)
{
// DragMove is a synchronous call: once it completes, the drag is finished and the left mouse
// button has been released.
window?.DragMove();
// See answer in section 'Additional Links' below in the SO answer.
//HideAndShowWindowHelper.ShiftWindowIntoForeground(window);
// When the use has finished the drag and released the mouse button, we shift the window back
// onto the screen, it it ended up partially off the screen.
ShiftWindowOntoScreenHelper.ShiftWindowOntoScreen(window);
}
}
}
catch (Exception ex)
{
_log.Warn($"Warning W52344. Exception in {nameof(UIElement_OnMouseMove)}. " +
$"This means that we cannot shift and drag the Toast Notification window. " +
$"To fix, correct C# code.", ex);
}
}
private static void ControlWindowVisibility(UserControl userControl)
{
Application.Current.Dispatcher.Invoke(
() =>
{
try
{
if (userControl == null)
{
_log.Warn(
$"Warning W62344. In '{nameof(UserControl_Loaded)}', the UserControl is null.");
return;
}
var parentWindow = userControl.MyGetParentVisualTreeWindow();
if (parentWindow == null)
{
// This is normal; if we call this before the visual tree has loaded and the 'Loaded' event has fired, it will create a warning.
return;
}
bool shouldBeVisibleMirror = true;
lock (_trackVisibilityLock)
{
TrackVisibility trackVisibility;
if (_trackVisibility.TryGetValue(userControl, out trackVisibility) == false)
{
_log.Warn("Warning W62344. Internal program error; could not find stats for Window.");
return;
}
shouldBeVisibleMirror = trackVisibility.ShouldBeVisible;
trackVisibility.ParentWindow = parentWindow;
}
if (shouldBeVisibleMirror == true)
{
HideAndShowWindowHelper.ShiftWindowIntoForeground(parentWindow);
ShiftWindowOntoScreenHelper.ShiftWindowOntoScreen(parentWindow);
_log.Debug($"Showing window: {parentWindow}\n");
}
else
{
HideAndShowWindowHelper.ShiftWindowIntoBackground(parentWindow);
_log.Debug($"Hiding window: {parentWindow}\n");
}
}
catch (Exception ex)
{
_log.Warn($"Warning W19844. Exception in Attached Property '{nameof(EnsureWindowInForeground)}'.", ex);
}
});
}