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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 CHROME_BROWSER_CHROMEOS_VIEWS_MENU_LOCATOR_H_ | |
| 6 #define CHROME_BROWSER_CHROMEOS_VIEWS_MENU_LOCATOR_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "third_party/skia/include/core/SkScalar.h" | |
| 10 | |
| 11 namespace gfx { | |
| 12 class Insets; | |
| 13 class Point; | |
| 14 class Size; | |
| 15 } // namespace gfx | |
| 16 | |
| 17 namespace chromeos { | |
| 18 | |
| 19 class WebUIMenuWidget; | |
| 20 | |
| 21 // MenuLocator class contorls where the menu will be placed and | |
| 22 // which corners are rounded. | |
| 23 // TODO(oshima): support RTL. | |
| 24 class MenuLocator { | |
| 25 public: | |
| 26 enum SubmenuDirection { | |
| 27 DEFAULT, // default direction. | |
| 28 RIGHT, // submenu should grow to right. (not used now. reserved for RTL) | |
| 29 LEFT, // submenu should grow to left. | |
| 30 }; | |
| 31 | |
| 32 virtual ~MenuLocator() {} | |
| 33 | |
| 34 // Returns the direction that submenu should grow. | |
| 35 virtual SubmenuDirection GetSubmenuDirection() const = 0; | |
| 36 | |
| 37 // Move the widget to the right position. | |
| 38 virtual void Move(WebUIMenuWidget* widget) = 0; | |
| 39 | |
| 40 // Resize and move the widget to the right position. | |
| 41 virtual void SetBounds(WebUIMenuWidget* widget, | |
| 42 const gfx::Size& size) = 0; | |
| 43 | |
| 44 // Returns the 8 length array of SkScalar that represents 4 corner | |
| 45 // radious for each menu type. The objects are owned by the locator | |
| 46 // and should not be deleted. This can be null when SubMenu is | |
| 47 // still off screen (not visible). | |
| 48 virtual const SkScalar* GetCorners() const = 0; | |
| 49 | |
| 50 // Returns the insets to give space to draw rounded corners. | |
| 51 virtual void GetInsets(gfx::Insets* insets) const = 0; | |
| 52 | |
| 53 // Returns the menu locator for dropdown menu. The menu will | |
| 54 // positioned so that the top right corner is given by "point". | |
| 55 // Only bottom corners are rounded. | |
| 56 static MenuLocator* CreateDropDownMenuLocator(const gfx::Point& point); | |
| 57 | |
| 58 // Returns the menu locator for context menu. The menu will | |
| 59 // positioned so that the top left corner is given by "point" (in | |
| 60 // LTR). All 4 corners are rounded. | |
| 61 static MenuLocator* CreateContextMenuLocator(const gfx::Point& point); | |
| 62 | |
| 63 // Returns the menu locator for submenu menu. The menu will | |
| 64 // positioned at Y and on the right side of the widget, or on the | |
| 65 // left if there is no enough spaceon the right side. Once it changes the | |
| 66 // derection, all subsequent submenu should be positioned to the same | |
| 67 // direction given by |parent_direction|. 3 corners are | |
| 68 // rounded except for the corner that is attached to the widget. | |
| 69 static MenuLocator* CreateSubMenuLocator( | |
| 70 const WebUIMenuWidget* widget, | |
| 71 MenuLocator::SubmenuDirection parent_direction, | |
| 72 int y); | |
| 73 }; | |
| 74 | |
| 75 } // namespace chromeos | |
| 76 | |
| 77 #endif // CHROME_BROWSER_CHROMEOS_VIEWS_MENU_LOCATOR_H_ | |
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