image_window_delegate.h revision 58537e28ecd584eab876aee8be7156509866d23a 
1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
6#define CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
7
8#include "ui/aura/window_delegate.h"
9#include "ui/gfx/image/image.h"
10#include "ui/gfx/size.h"
11
12namespace content {
13
14// An ImageWindowDelegate paints an image for a Window. The delegate destroys
15// itself when the Window is destroyed. The delegate does not consume any event.
16class ImageWindowDelegate : public aura::WindowDelegate {
17 public:
18  ImageWindowDelegate();
19
20  void SetImage(const gfx::Image& image);
21  bool has_image() const { return !image_.IsEmpty(); }
22
23 protected:
24  virtual ~ImageWindowDelegate();
25
26  // Overridden from aura::WindowDelegate:
27  virtual gfx::Size GetMinimumSize() const OVERRIDE;
28  virtual gfx::Size GetMaximumSize() const OVERRIDE;
29  virtual void OnBoundsChanged(const gfx::Rect& old_bounds,
30                               const gfx::Rect& new_bounds) OVERRIDE;
31  virtual gfx::NativeCursor GetCursor(const gfx::Point& point) OVERRIDE;
32  virtual int GetNonClientComponent(const gfx::Point& point) const OVERRIDE;
33  virtual bool ShouldDescendIntoChildForEventHandling(
34      aura::Window* child,
35      const gfx::Point& location) OVERRIDE;
36  virtual bool CanFocus() OVERRIDE;
37  virtual void OnCaptureLost() OVERRIDE;
38  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
39  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE;
40  virtual void OnWindowDestroying() OVERRIDE;
41  virtual void OnWindowDestroyed() OVERRIDE;
42  virtual void OnWindowTargetVisibilityChanged(bool visible) OVERRIDE;
43  virtual bool HasHitTestMask() const OVERRIDE;
44  virtual void GetHitTestMask(gfx::Path* mask) const OVERRIDE;
45  virtual void DidRecreateLayer(ui::Layer* old_layer,
46                                ui::Layer* new_layer) OVERRIDE;
47
48 protected:
49  gfx::Image image_;
50  gfx::Size window_size_;
51
52  // Keeps track of whether the window size matches the image size or not. If
53  // the image size is smaller than the window size, then the delegate paints a
54  // white background for the missing regions.
55  bool size_mismatch_;
56
57  DISALLOW_COPY_AND_ASSIGN(ImageWindowDelegate);
58};
59
60}  // namespace content
61
62#endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
63