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1 // Copyright (c) 2009 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_VIEWS_ACCESSIBLE_TOOLBAR_VIEW_H_ | |
6 #define CHROME_BROWSER_VIEWS_ACCESSIBLE_TOOLBAR_VIEW_H_ | |
7 | |
8 #include "views/view.h" | |
9 | |
10 // This class provides keyboard access to any view that extends it by intiating | |
11 // ALT+SHIFT+T. And once you press TAB or SHIFT-TAB, it will traverse all the | |
12 // toolbars within Chrome. Child views are traversed in the order they were | |
13 // added. | |
14 | |
15 class AccessibleToolbarView : public views::View { | |
16 public: | |
17 AccessibleToolbarView(); | |
18 virtual ~AccessibleToolbarView(); | |
19 | |
20 // Initiate the traversal on the toolbar. | |
21 void InitiateTraversal(); | |
22 | |
23 // Overridden from views::View: | |
24 virtual void DidGainFocus(); | |
25 virtual void WillLoseFocus(); | |
26 virtual bool OnKeyPressed(const views::KeyEvent& e); | |
27 virtual bool OnKeyReleased(const views::KeyEvent& e); | |
28 virtual bool SkipDefaultKeyEventProcessing(const views::KeyEvent& e); | |
29 virtual void ShowContextMenu(int x, int y, bool is_mouse_gesture); | |
30 virtual void RequestFocus(); | |
31 virtual bool GetAccessibleName(std::wstring* name); | |
32 virtual bool GetAccessibleRole(AccessibilityTypes::Role* role); | |
33 virtual void SetAccessibleName(const std::wstring& name); | |
34 virtual void ViewHierarchyChanged(bool is_add, View* parent, View* child); | |
35 virtual View* GetAccFocusedChildView() { return selected_focused_view_; } | |
36 | |
37 protected: | |
38 // Returns the index of the next view of the toolbar, starting from the given | |
39 // view index. |forward| when true means it will navigate from left to right, | |
40 // and vice versa when false. If |view_index| is -1 the first accessible child | |
41 // is returned. | |
42 int GetNextAccessibleViewIndex(int view_index, bool forward); | |
43 | |
44 // Invoked from GetNextAccessibleViewIndex to determine if |view| can be | |
45 // traversed to. Default implementation returns true, override to return false | |
46 // for views you don't want reachable. | |
47 virtual bool IsAccessibleViewTraversable(views::View* view); | |
48 | |
49 private: | |
50 // Sets the focus to the currently |acc_focused_view_| view. | |
51 void SetFocusToAccessibleView(); | |
52 | |
53 // Storage of strings needed for accessibility. | |
54 std::wstring accessible_name_; | |
55 | |
56 // Selected child view currently having accessibility focus. | |
57 views::View* selected_focused_view_; | |
58 | |
59 // Last focused view that issued this traversal. | |
60 int last_focused_view_storage_id_; | |
61 | |
62 DISALLOW_COPY_AND_ASSIGN(AccessibleToolbarView); | |
63 }; | |
64 | |
65 #endif // CHROME_BROWSER_VIEWS_ACCESSIBLE_TOOLBAR_VIEW_H_ | |
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