private bool RaiseContextMenuOpeningEvent(IInputElement source, double x, double y, bool userInitiated) { // Fire the event ContextMenuEventArgs args = new ContextMenuEventArgs(source, true /* opening */, x, y); DependencyObject sourceDO = source as DependencyObject; if (userInitiated && sourceDO != null) { if (InputElement.IsUIElement(sourceDO)) { ((UIElement)sourceDO).RaiseEvent(args, userInitiated); } else if (InputElement.IsContentElement(sourceDO)) { ((ContentElement)sourceDO).RaiseEvent(args, userInitiated); } else if (InputElement.IsUIElement3D(sourceDO)) { ((UIElement3D)sourceDO).RaiseEvent(args, userInitiated); } else { source.RaiseEvent(args); } } else { source.RaiseEvent(args); } if (!args.Handled) { // No one handled the event, auto show any available ContextMenus // Saved from the bubble up the tree where we looked for a set ContextMenu property DependencyObject o = args.TargetElement; if ((o != null) && ContextMenuService.ContextMenuIsEnabled(o)) { // Retrieve the value object menu = ContextMenuService.GetContextMenu(o); ContextMenu cm = menu as ContextMenu; cm.SetValue(OwnerProperty, o); cm.Closed += new RoutedEventHandler(OnContextMenuClosed); if ((x == -1.0) && (y == -1.0)) { // We infer this to mean that the ContextMenu was opened with the keyboard cm.Placement = PlacementMode.Center; } else { // If there is a CursorLeft and CursorTop, it was opened with the mouse. cm.Placement = PlacementMode.MousePoint; } // Clear any open tooltips RaiseToolTipClosingEvent(true /*reset */); cm.SetCurrentValueInternal(ContextMenu.IsOpenProperty, BooleanBoxes.TrueBox); return(true); // A menu was opened } return(false); // There was no menu to open } // Clear any open tooltips since someone else opened one RaiseToolTipClosingEvent(true /*reset */); return(true); // The event was handled by someone else }