1 // Copyright 2014 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 #ifndef UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_H_ 6 #define UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_H_ 7 8 #include "ui/gfx/native_widget_types.h" 9 10 namespace gfx { 11 class Point; 12 } 13 14 namespace ui { 15 class LocatedEvent; 16 } 17 18 namespace views { 19 20 class MenuController; 21 class Widget; 22 23 // Interface used by MenuController to run a nested message loop while 24 // showing a menu, allowing for platform specific implementations. 25 class MenuMessageLoop { 26 public: 27 virtual ~MenuMessageLoop() {} 28 29 // Create a platform specific instance. 30 static MenuMessageLoop* Create(); 31 32 // Runs the platform specific bits of the message loop. If |nested_menu| is 33 // true we're being asked to run a menu from within a menu (eg a context 34 // menu). 35 virtual void Run(MenuController*, Widget* owner, bool nested_menu) = 0; 36 37 // Returns true if it is a good time to call QuitNow(). 38 // Returns false otherwise, for example if a drag and drop is in progress. 39 virtual bool ShouldQuitNow() const = 0; 40 41 // Quit an earlier call to Run(). 42 virtual void QuitNow() = 0; 43 44 // Repost |event| to |window|. 45 // |screen_loc| is the event's location in screen coordinates. 46 virtual void RepostEventToWindow(const ui::LocatedEvent& event, 47 gfx::NativeWindow window, 48 const gfx::Point& screen_loc) = 0; 49 50 // Clear any references to the owner widget that was passed into the previous 51 // call to Run(). 52 virtual void ClearOwner() = 0; 53 }; 54 55 } // namespace views 56 57 #endif // UI_VIEWS_CONTROLS_MENU_MENU_MESSAGE_LOOP_H_ 58
