It is time.

ui/views/controls/button/button.h

-// Copyright (c) 2011 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_BUTTON_H_
-#define UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_
-
-#include "ui/native_theme/native_theme.h"
-#include "ui/views/view.h"
-
-namespace views {
-
-class Button;
-class Event;
-
-// An interface implemented by an object to let it know that a button was
-// pressed.
-class VIEWS_EXPORT ButtonListener {
- public:
-  virtual void ButtonPressed(Button* sender, const ui::Event& event) = 0;
-
- protected:
-  virtual ~ButtonListener() {}
-};
-
-// A View representing a button. Depending on the specific type, the button
-// could be implemented by a native control or custom rendered.
-class VIEWS_EXPORT Button : public View {
- public:
-  virtual ~Button();
-
-  // Button states for various button sub-types.
-  enum ButtonState {
-    STATE_NORMAL = 0,
-    STATE_HOVERED,
-    STATE_PRESSED,
-    STATE_DISABLED,
-    STATE_COUNT,
-  };
-
-  // Button styles with associated images and border painters.
-  // TODO(msw): Add Menu, ComboBox, etc.
-  enum ButtonStyle {
-    STYLE_BUTTON = 0,
-    STYLE_TEXTBUTTON,
-    STYLE_COUNT,
-  };
-
-  static ButtonState GetButtonStateFrom(ui::NativeTheme::State state);
-
-  void SetTooltipText(const base::string16& tooltip_text);
-
-  int tag() const { return tag_; }
-  void set_tag(int tag) { tag_ = tag; }
-
-  void SetAccessibleName(const base::string16& name);
-
-  // Overridden from View:
-  virtual bool GetTooltipText(const gfx::Point& p,
-                              base::string16* tooltip) const override;
-  virtual void GetAccessibleState(ui::AXViewState* state) override;
-
- protected:
-  // Construct the Button with a Listener. The listener can be NULL. This can be
-  // true of buttons that don't have a listener - e.g. menubuttons where there's
-  // no default action and checkboxes.
-  explicit Button(ButtonListener* listener);
-
-  // Cause the button to notify the listener that a click occurred.
-  virtual void NotifyClick(const ui::Event& event);
-
-  // The button's listener. Notified when clicked.
-  ButtonListener* listener_;
-
- private:
-  // The text shown in a tooltip.
-  base::string16 tooltip_text_;
-
-  // Accessibility data.
-  base::string16 accessible_name_;
-
-  // The id tag associated with this button. Used to disambiguate buttons in
-  // the ButtonListener implementation.
-  int tag_;
-
-  DISALLOW_COPY_AND_ASSIGN(Button);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_BUTTON_BUTTON_H_