protected override void OnMouseDown(MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left)
{
var window = Window.GetWindow(this);
if (e.ClickCount == 1)
{
if (!this._isSystemMenuOpened)
{
this._isSystemMenuOpened = true;
var point = this.PointToScreen(new Point(0, this.ActualHeight));
var dpi = Dpi.FromVisual(window);
SystemCommands.ShowSystemMenu(window, dpi.PhysicalToLogical(point));
}
else
{
this._isSystemMenuOpened = false;
}
}
else if (e.ClickCount == 2)
{
window.Close();
}
}
else
{
base.OnMouseDown(e);
}
}
protected override void OnMouseRightButtonUp(MouseButtonEventArgs e)
{
var window = Window.GetWindow(this);
var point = this.PointToScreen(e.GetPosition(this));
var dpi = Dpi.FromVisual(window);
SystemCommands.ShowSystemMenu(window, dpi.PhysicalToLogical(point));
}
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
if (HasBuiltInScaling)
{
this.SystemDpi = Dpi.FromVisual(this);
}
else
{
this._source = (HwndSource)PresentationSource.FromVisual(this);
if (this._source == null)
{
return;
}
this._source.AddHook(this.WndProc);
this.SystemDpi = Dpi.FromPresentationSource(this._source);
}
this.WindowDpi = this.SystemDpi;
}