It is time.

ui/aura/window_delegate.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_AURA_WINDOW_DELEGATE_H_
-#define UI_AURA_WINDOW_DELEGATE_H_
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "ui/aura/aura_export.h"
-#include "ui/events/event_constants.h"
-#include "ui/events/event_handler.h"
-#include "ui/gfx/native_widget_types.h"
-
-namespace gfx {
-class Canvas;
-class Path;
-class Point;
-class Rect;
-class Size;
-}
-
-namespace ui {
-class GestureEvent;
-class KeyEvent;
-class Layer;
-class MouseEvent;
-class Texture;
-class TouchEvent;
-}
-
-namespace aura {
-
-// Delegate interface for aura::Window.
-class AURA_EXPORT WindowDelegate : public ui::EventHandler {
- public:
-  // Returns the window's minimum size, or size 0,0 if there is no limit.
-  virtual gfx::Size GetMinimumSize() const = 0;
-
-  // Returns the window's maximum size, or size 0,0 if there is no limit.
-  virtual gfx::Size GetMaximumSize() const = 0;
-
-  // Called when the Window's position and/or size changes.
-  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
-                               const gfx::Rect& new_bounds) = 0;
-
-  // Returns the native cursor for the specified point, in window coordinates,
-  // or NULL for the default cursor.
-  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) = 0;
-
-  // Returns the non-client component (see hit_test.h) containing |point|, in
-  // window coordinates.
-  virtual int GetNonClientComponent(const gfx::Point& point) const = 0;
-
-  // Returns true if event handling should descend into |child|. |location| is
-  // in terms of the Window.
-  virtual bool ShouldDescendIntoChildForEventHandling(
-      Window* child,
-      const gfx::Point& location) = 0;
-
-  // Returns true of the window can be focused.
-  virtual bool CanFocus() = 0;
-
-  // Invoked when mouse capture is lost on the window.
-  virtual void OnCaptureLost() = 0;
-
-  // Asks the delegate to paint window contents into the supplied canvas.
-  virtual void OnPaint(gfx::Canvas* canvas) = 0;
-
-  // Called when the window's device scale factor has changed.
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) = 0;
-
-  // Called from Window's destructor before OnWindowDestroyed and before the
-  // children have been destroyed and the window has been removed from its
-  // parent.
-  // This method takes the window because the delegate implementation may no
-  // longer have a route back to the window by the time this method is called.
-  virtual void OnWindowDestroying(Window* window) = 0;
-
-  // Called when the Window has been destroyed (i.e. from its destructor). This
-  // is called after OnWindowDestroying and after the children have been
-  // deleted and the window has been removed from its parent.
-  // The delegate can use this as an opportunity to delete itself if necessary.
-  // This method takes the window because the delegate implementation may no
-  // longer have a route back to the window by the time this method is called.
-  virtual void OnWindowDestroyed(Window* window) = 0;
-
-  // Called when the TargetVisibility() of a Window changes. |visible|
-  // corresponds to the target visibility of the window. See
-  // Window::TargetVisibility() for details.
-  virtual void OnWindowTargetVisibilityChanged(bool visible) = 0;
-
-  // Called from Window::HitTest to check if the window has a custom hit test
-  // mask. It works similar to the views counterparts. That is, if the function
-  // returns true, GetHitTestMask below will be called to get the mask.
-  // Otherwise, Window will hit-test against its bounds.
-  virtual bool HasHitTestMask() const = 0;
-
-  // Called from Window::HitTest to retrieve hit test mask when HasHitTestMask
-  // above returns true.
-  virtual void GetHitTestMask(gfx::Path* mask) const = 0;
-
- protected:
-  virtual ~WindowDelegate() {}
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_WINDOW_DELEGATE_H_