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// Copyright (c) 2012 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 UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
#define UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
#include <string>
#include "base/strings/string16.h"
#include "base/time/time.h"
#include "ui/gfx/font.h"
#include "ui/views/background.h"
#include "ui/views/controls/button/text_button.h"
namespace views {
class MenuButtonListener;
////////////////////////////////////////////////////////////////////////////////
//
// MenuButton
//
// A button that shows a menu when the left mouse button is pushed
//
////////////////////////////////////////////////////////////////////////////////
class VIEWS_EXPORT MenuButton : public TextButton {
public:
static const char kViewClassName[];
// How much padding to put on the left and right of the menu marker.
static const int kMenuMarkerPaddingLeft;
static const int kMenuMarkerPaddingRight;
// Create a Button.
MenuButton(ButtonListener* listener,
const string16& text,
MenuButtonListener* menu_button_listener,
bool show_menu_marker);
virtual ~MenuButton();
bool show_menu_marker() const { return show_menu_marker_; }
void set_menu_marker(const gfx::ImageSkia* menu_marker) {
menu_marker_ = menu_marker;
}
const gfx::ImageSkia* menu_marker() const { return menu_marker_; }
const gfx::Point& menu_offset() const { return menu_offset_; }
void set_menu_offset(int x, int y) { menu_offset_.SetPoint(x, y); }
// Activate the button (called when the button is pressed).
virtual bool Activate();
// Overridden from TextButton for the potential use of a drop marker.
virtual void PaintButton(gfx::Canvas* canvas, PaintButtonMode mode) OVERRIDE;
// Overridden from View:
virtual gfx::Size GetPreferredSize() OVERRIDE;
virtual const char* GetClassName() const OVERRIDE;
virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
virtual bool OnKeyReleased(const ui::KeyEvent& event) OVERRIDE;
virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
protected:
// True if the menu is currently visible.
bool menu_visible_;
// Offset of the associated menu position.
gfx::Point menu_offset_;
private:
friend class TextButtonBackground;
// Compute the maximum X coordinate for the current screen. MenuButtons
// use this to make sure a menu is never shown off screen.
int GetMaximumScreenXCoordinate();
// We use a time object in order to keep track of when the menu was closed.
// The time is used for simulating menu behavior for the menu button; that
// is, if the menu is shown and the button is pressed, we need to close the
// menu. There is no clean way to get the second click event because the
// menu is displayed using a modal loop and, unlike regular menus in Windows,
// the button is not part of the displayed menu.
base::Time menu_closed_time_;
// Our listener. Not owned.
MenuButtonListener* listener_;
// Whether or not we're showing a drop marker.
bool show_menu_marker_;
// The down arrow used to differentiate the menu button from normal
// text buttons.
const gfx::ImageSkia* menu_marker_;
// If non-null the destuctor sets this to true. This is set while the menu is
// showing and used to detect if the menu was deleted while running.
bool* destroyed_flag_;
DISALLOW_COPY_AND_ASSIGN(MenuButton);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
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