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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_TOOLBAR_BACK_BUTTON_H_
#define CHROME_BROWSER_UI_VIEWS_TOOLBAR_BACK_BUTTON_H_
#include "chrome/browser/ui/views/toolbar/toolbar_button.h"
namespace ui {
class MenuModel;
}
namespace views {
class Border;
class ButtonListener;
}
// A subclass of ToolbarButton to allow the back button's hittest region to
// extend all the way to the start of the toolbar (i.e. the screen edge) in
// maximized mode, to benefit from Fitt's Law. The button images and focus
// border are still drawn with the normal square shape.
class BackButton : public ToolbarButton {
public:
// Takes ownership of the |model|, which can be null if no menu
// is to be shown.
BackButton(views::ButtonListener* listener, ui::MenuModel* model);
~BackButton() override;
void SetLeadingMargin(int margin);
protected:
gfx::Rect GetThemePaintRect() const override;
scoped_ptr<views::LabelButtonBorder> CreateDefaultBorder() const override;
private:
// Any leading margin to be applied. Used when the back button is in
// a maximized state to extend to the full window width.
int margin_leading_;
DISALLOW_COPY_AND_ASSIGN(BackButton);
};
#endif // CHROME_BROWSER_UI_VIEWS_TOOLBAR_BACK_BUTTON_H_
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