It is time.

ui/views/controls/button/menu_button.h

-// 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/memory/weak_ptr.h"
-#include "base/strings/string16.h"
-#include "base/time/time.h"
-#include "ui/views/background.h"
-#include "ui/views/controls/button/label_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 LabelButton {
- public:
-  // A scoped lock for keeping the MenuButton in STATE_PRESSED e.g., while a
-  // menu is running. These are cumulative.
-  class VIEWS_EXPORT PressedLock {
-   public:
-    explicit PressedLock(MenuButton* menu_button);
-    ~PressedLock();
-
-   private:
-    base::WeakPtr<MenuButton> menu_button_;
-
-    DISALLOW_COPY_AND_ASSIGN(PressedLock);
-  };
-
-  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 base::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 View:
-  virtual gfx::Size GetPreferredSize() const override;
-  virtual const char* GetClassName() const override;
-  virtual void OnPaint(gfx::Canvas* canvas) override;
-  virtual bool OnMousePressed(const ui::MouseEvent& event) override;
-  virtual void OnMouseReleased(const ui::MouseEvent& event) override;
-  virtual void OnMouseEntered(const ui::MouseEvent& event) override;
-  virtual void OnMouseExited(const ui::MouseEvent& event) override;
-  virtual void OnMouseMoved(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::AXViewState* state) override;
-
- protected:
-  // Paint the menu marker image.
-  void PaintMenuMarker(gfx::Canvas* canvas);
-
-  // Overridden from LabelButton:
-  virtual gfx::Rect GetChildAreaBounds() override;
-
-  // Offset of the associated menu position.
-  gfx::Point menu_offset_;
-
- private:
-  friend class PressedLock;
-
-  // Increment/decrement the number of "pressed" locks this button has, and
-  // set the state accordingly.
-  void IncrementPressedLocked();
-  void DecrementPressedLocked();
-
-  // 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::TimeTicks 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 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_;
-
-  // The current number of "pressed" locks this button has.
-  int pressed_lock_count_;
-
-  base::WeakPtrFactory<MenuButton> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(MenuButton);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_BUTTON_MENU_BUTTON_H_