1// Copyright (c) 2010 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 PPAPI_CPP_DEV_WIDGET_CLIENT_DEV_H_
6#define PPAPI_CPP_DEV_WIDGET_CLIENT_DEV_H_
7
8#include "ppapi/c/pp_stdint.h"
9#include "ppapi/cpp/instance_handle.h"
10
11namespace pp {
12
13class Instance;
14class Rect;
15class Scrollbar_Dev;
16class Widget_Dev;
17
18// This class provides a C++ interface for callbacks related to widgets. You
19// would normally use multiple inheritance to derive from this class in your
20// instance.
21class WidgetClient_Dev {
22 public:
23  explicit WidgetClient_Dev(Instance* instance);
24  virtual ~WidgetClient_Dev();
25
26  /**
27   * Notification that the given widget should be repainted. This is the
28   * implementation for PPP_Widget_Dev.
29   */
30  virtual void InvalidateWidget(Widget_Dev widget, const Rect& dirty_rect) = 0;
31
32  /**
33   * Notification that the given scrollbar should change value. This is the
34   * implementation for PPP_Scrollbar_Dev.
35   */
36  virtual void ScrollbarValueChanged(Scrollbar_Dev scrollbar,
37                                     uint32_t value) = 0;
38
39  /**
40   * Notification that the given scrollbar's overlay type has changed. This is
41   * the implementation for PPP_Scrollbar_Dev.
42   */
43  virtual void ScrollbarOverlayChanged(Scrollbar_Dev scrollbar,
44                                       bool type) = 0;
45
46 private:
47  InstanceHandle associated_instance_;
48};
49
50}  // namespace pp
51
52#endif  // PPAPI_CPP_DEV_WIDGET_CLIENT_DEV_H_
53