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| 1 // Copyright (c) 2011 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_2_H_ | |
| 6 #define UI_VIEWS_CONTROLS_MENU_MENU_2_H_ | |
| 7 | |
| 8 #include "base/basictypes.h" | |
| 9 #include "base/memory/scoped_ptr.h" | |
| 10 #include "ui/gfx/native_widget_types.h" | |
| 11 #include "ui/views/controls/menu/menu_wrapper.h" | |
| 12 #include "ui/views/views_export.h" | |
| 13 | |
| 14 namespace gfx { | |
| 15 class Point; | |
| 16 } | |
| 17 | |
| 18 namespace ui { | |
| 19 class MenuModel; | |
| 20 } | |
| 21 | |
| 22 namespace views { | |
| 23 | |
| 24 // A menu. Populated from a model, and relies on a delegate to execute commands. | |
| 25 // | |
| 26 // WARNING: do NOT create and use Menu2 on the stack. Menu2 notifies the model | |
| 27 // of selection AFTER a delay. This means that if use a Menu2 on the stack | |
| 28 // ActivatedAt is never invoked. | |
| 29 class VIEWS_EXPORT Menu2 { | |
| 30 public: | |
| 31 // How the menu is aligned relative to the point it is shown at. | |
| 32 // The alignment is reversed by menu if text direction is right to left. | |
| 33 enum Alignment { | |
| 34 ALIGN_TOPLEFT, | |
| 35 ALIGN_TOPRIGHT | |
| 36 }; | |
| 37 | |
| 38 // Creates a new menu populated with the contents of |model|. | |
| 39 // WARNING: this populates the menu on construction by invoking methods on | |
| 40 // the model. As such, it is typically not safe to use this as the model | |
| 41 // from the constructor. EG: | |
| 42 // MyClass : menu_(this) {} | |
| 43 // is likely to have problems. | |
| 44 explicit Menu2(ui::MenuModel* model); | |
| 45 virtual ~Menu2(); | |
| 46 | |
| 47 // Runs the menu at the specified point. This method blocks until done. | |
| 48 // RunContextMenuAt is the same, but the alignment is the default for a | |
| 49 // context menu. | |
| 50 void RunMenuAt(const gfx::Point& point, Alignment alignment); | |
| 51 void RunContextMenuAt(const gfx::Point& point); | |
| 52 | |
| 53 // Cancels the active menu. | |
| 54 void CancelMenu(); | |
| 55 | |
| 56 // Called when the model supplying data to this menu has changed, and the menu | |
| 57 // must be rebuilt. | |
| 58 void Rebuild(); | |
| 59 | |
| 60 // Called when the states of the menu items in the menu should be refreshed | |
| 61 // from the model. | |
| 62 void UpdateStates(); | |
| 63 | |
| 64 // For submenus. | |
| 65 HMENU GetNativeMenu() const; | |
| 66 | |
| 67 // Get the result of the last call to RunMenuAt to determine whether an | |
| 68 // item was selected, the user navigated to a next or previous menu, or | |
| 69 // nothing. | |
| 70 MenuWrapper::MenuAction GetMenuAction() const; | |
| 71 | |
| 72 // Add a listener to receive a callback when the menu opens. | |
| 73 void AddMenuListener(MenuListener* listener); | |
| 74 | |
| 75 // Remove a menu listener. | |
| 76 void RemoveMenuListener(MenuListener* listener); | |
| 77 | |
| 78 // Accessors. | |
| 79 ui::MenuModel* model() const { return model_; } | |
| 80 | |
| 81 // Sets the minimum width of the menu. | |
| 82 void SetMinimumWidth(int width); | |
| 83 | |
| 84 private: | |
| 85 | |
| 86 ui::MenuModel* model_; | |
| 87 | |
| 88 // The object that actually implements the menu. | |
| 89 scoped_ptr<MenuWrapper> wrapper_; | |
| 90 | |
| 91 DISALLOW_COPY_AND_ASSIGN(Menu2); | |
| 92 }; | |
| 93 | |
| 94 } // namespace views | |
| 95 | |
| 96 #endif // UI_VIEWS_CONTROLS_MENU_MENU_2_H_ | |
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