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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_TOOLBAR_BUTTON_H_
#define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_
#include "ui/views/context_menu_controller.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/controls/button/label_button.h"
namespace ui {
class MenuModel;
}
namespace views {
class MenuRunner;
}
// This class provides basic drawing and mouse-over behavior for buttons
// appearing in the toolbar.
class ToolbarButton : public views::LabelButton,
public views::ContextMenuController {
public:
// Takes ownership of the |model|, which can be null if no menu
// is to be shown.
ToolbarButton(views::ButtonListener* listener, ui::MenuModel* model);
~ToolbarButton() override;
// Set up basic mouseover border behavior.
// Should be called before first paint.
void Init();
// Methods for handling ButtonDropDown-style menus.
void ClearPendingMenu();
bool IsMenuShowing() const;
// views::LabelButton:
gfx::Size GetPreferredSize() const override;
bool OnMousePressed(const ui::MouseEvent& event) override;
bool OnMouseDragged(const ui::MouseEvent& event) override;
void OnMouseReleased(const ui::MouseEvent& event) override;
// Showing the drop down results in a MouseCaptureLost, we need to ignore it.
void OnMouseCaptureLost() override;
void OnMouseExited(const ui::MouseEvent& event) override;
void OnGestureEvent(ui::GestureEvent* event) override;
void GetAccessibleState(ui::AXViewState* state) override;
scoped_ptr<views::LabelButtonBorder> CreateDefaultBorder() const override;
// views::ContextMenuController:
void ShowContextMenuForView(View* source,
const gfx::Point& point,
ui::MenuSourceType source_type) override;
protected:
// Overridden from CustomButton. Returns true if the button should become
// pressed when a user holds the mouse down over the button. For this
// implementation, both left and right mouse buttons can trigger a change
// to the PUSHED state.
bool ShouldEnterPushedState(const ui::Event& event) override;
// Returns if menu should be shown. Override this to change default behavior.
virtual bool ShouldShowMenu();
// Function to show the dropdown menu.
virtual void ShowDropDownMenu(ui::MenuSourceType source_type);
private:
// The model that populates the attached menu.
scoped_ptr<ui::MenuModel> model_;
// Indicates if menu is currently showing.
bool menu_showing_;
// Y position of mouse when left mouse button is pressed
int y_position_on_lbuttondown_;
// Menu runner to display drop down menu.
scoped_ptr<views::MenuRunner> menu_runner_;
// A factory for tasks that show the dropdown context menu for the button.
base::WeakPtrFactory<ToolbarButton> show_menu_factory_;
DISALLOW_COPY_AND_ASSIGN(ToolbarButton);
};
#endif // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_BUTTON_H_
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