ui/views/controls/menu/menu_host_root_view.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/views/controls/menu/menu_host_root_view.h"
   6
   7 #include "ui/views/controls/menu/menu_controller.h"
   8 #include "ui/views/controls/menu/menu_item_view.h"
   9 #include "ui/views/controls/menu/submenu_view.h"
  10
  11 namespace views {
  12
  13 MenuHostRootView::MenuHostRootView(Widget* widget,
  14                                    SubmenuView* submenu)
  15     : internal::RootView(widget),
  16       submenu_(submenu),
  17       forward_drag_to_menu_controller_(true) {
  18 }
  19
  20 bool MenuHostRootView::OnMousePressed(const ui::MouseEvent& event) {
  21   forward_drag_to_menu_controller_ =
  22       !GetLocalBounds().Contains(event.location()) ||
  23       !RootView::OnMousePressed(event) ||
  24       DoesEventTargetEmptyMenuItem(event);
  25
  26   if (forward_drag_to_menu_controller_ && GetMenuController())
  27     GetMenuController()->OnMousePressed(submenu_, event);
  28   return true;
  29 }
  30
  31 bool MenuHostRootView::OnMouseDragged(const ui::MouseEvent& event) {
  32   if (forward_drag_to_menu_controller_ && GetMenuController()) {
  33     GetMenuController()->OnMouseDragged(submenu_, event);
  34     return true;
  35   }
  36   return RootView::OnMouseDragged(event);
  37 }
  38
  39 void MenuHostRootView::OnMouseReleased(const ui::MouseEvent& event) {
  40   RootView::OnMouseReleased(event);
  41   if (forward_drag_to_menu_controller_ && GetMenuController()) {
  42     forward_drag_to_menu_controller_ = false;
  43     GetMenuController()->OnMouseReleased(submenu_, event);
  44   }
  45 }
  46
  47 void MenuHostRootView::OnMouseMoved(const ui::MouseEvent& event) {
  48   RootView::OnMouseMoved(event);
  49   if (GetMenuController())
  50     GetMenuController()->OnMouseMoved(submenu_, event);
  51 }
  52
  53 bool MenuHostRootView::OnMouseWheel(const ui::MouseWheelEvent& event) {
  54   return GetMenuController() &&
  55       GetMenuController()->OnMouseWheel(submenu_, event);
  56 }
  57
  58 ui::EventDispatchDetails MenuHostRootView::OnEventFromSource(ui::Event* event) {
  59   ui::EventDispatchDetails result = RootView::OnEventFromSource(event);
  60
  61   if (event->IsGestureEvent()) {
  62     ui::GestureEvent* gesture_event = event->AsGestureEvent();
  63     if (gesture_event->handled())
  64       return result;
  65     // ChromeOS uses MenuController to forward events like other
  66     // mouse events.
  67     if (!GetMenuController())
  68       return result;
  69     GetMenuController()->OnGestureEvent(submenu_, gesture_event);
  70   }
  71
  72   return result;
  73 }
  74
  75 MenuController* MenuHostRootView::GetMenuController() {
  76   return submenu_ ? submenu_->GetMenuItem()->GetMenuController() : NULL;
  77 }
  78
  79 bool MenuHostRootView::DoesEventTargetEmptyMenuItem(
  80     const ui::MouseEvent& event) {
  81   View* view = GetEventHandlerForPoint(event.location());
  82   return view && view->id() == MenuItemView::kEmptyMenuItemViewID;
  83 }
  84
  85 }  // namespace views