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
10namespace gfx {
11class Point;
12}
13
14namespace ui {
15class LocatedEvent;
16}
17
18namespace views {
19
20class MenuController;
21class Widget;
22
23// Interface used by MenuController to run a nested message loop while
24// showing a menu, allowing for platform specific implementations.
25class 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