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// Copyright (c) 2010 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 VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
#define VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
#pragma once
#include <string>
#include "base/time.h"
#include "gfx/font.h"
#include "views/background.h"
#include "views/controls/button/text_button.h"
namespace views {
class MouseEvent;
class ViewMenuDelegate;
////////////////////////////////////////////////////////////////////////////////
//
// MenuButton
//
// A button that shows a menu when the left mouse button is pushed
//
////////////////////////////////////////////////////////////////////////////////
class MenuButton : public TextButton {
public:
// The menu button's class name.
static const char kViewClassName[];
// Create a Button.
MenuButton(ButtonListener* listener,
const std::wstring& text,
ViewMenuDelegate* menu_delegate,
bool show_menu_marker);
virtual ~MenuButton();
void set_menu_marker(const SkBitmap* menu_marker) {
menu_marker_ = menu_marker;
}
// Activate the button (called when the button is pressed).
virtual bool Activate();
// Overridden to take into account the potential use of a drop marker.
virtual gfx::Size GetPreferredSize();
virtual void Paint(gfx::Canvas* canvas, bool for_drag);
// These methods are overriden to implement a simple push button
// behavior.
virtual bool OnMousePressed(const MouseEvent& e);
virtual void OnMouseReleased(const MouseEvent& e, bool canceled);
virtual void OnMouseExited(const MouseEvent& event);
virtual bool OnKeyPressed(const KeyEvent& e);
virtual bool OnKeyReleased(const KeyEvent& e);
// Accessibility accessors, overridden from View.
virtual std::wstring GetAccessibleDefaultAction();
virtual AccessibilityTypes::Role GetAccessibleRole();
virtual AccessibilityTypes::State GetAccessibleState();
// Returns views/MenuButton.
virtual std::string GetClassName() const;
// Accessors for menu_offset_.
const gfx::Point& menu_offset() const {
return menu_offset_;
}
void set_menu_offset(int x, int y) {
menu_offset_.SetPoint(x, y);
}
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_;
// The associated menu's resource identifier.
ViewMenuDelegate* menu_delegate_;
// 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 SkBitmap* 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 // VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_
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