1 // Copyright 2013 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_UI_VIEWS_TOOLBAR_BACK_BUTTON_H_ 6 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_BACK_BUTTON_H_ 7 8 #include "chrome/browser/ui/views/toolbar/toolbar_button.h" 9 10 namespace ui { 11 class MenuModel; 12 } 13 14 namespace views { 15 class Border; 16 class ButtonListener; 17 } 18 19 // A subclass of ToolbarButton to allow the back button's hittest region to 20 // extend all the way to the start of the toolbar (i.e. the screen edge) in 21 // maximized mode, to benefit from Fitt's Law. The button images and focus 22 // border are still drawn with the normal square shape. 23 class BackButton : public ToolbarButton { 24 public: 25 // Takes ownership of the |model|, which can be null if no menu 26 // is to be shown. 27 BackButton(views::ButtonListener* listener, ui::MenuModel* model); 28 virtual ~BackButton(); 29 30 void SetLeadingMargin(int margin); 31 32 protected: 33 virtual gfx::Rect GetThemePaintRect() const OVERRIDE; 34 virtual scoped_ptr<views::LabelButtonBorder> CreateDefaultBorder() const 35 OVERRIDE; 36 37 private: 38 // Any leading margin to be applied. Used when the back button is in 39 // a maximized state to extend to the full window width. 40 int margin_leading_; 41 42 DISALLOW_COPY_AND_ASSIGN(BackButton); 43 }; 44 45 #endif // CHROME_BROWSER_UI_VIEWS_TOOLBAR_BACK_BUTTON_H_ 46
