painted_scrollbar_layer_impl.h revision 4e180b6a0b4720a9b8e9e959a882386f690f08ff 
1// Copyright 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 CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_
6#define CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_
7
8#include "cc/base/cc_export.h"
9#include "cc/input/scrollbar.h"
10#include "cc/layers/scrollbar_layer_impl_base.h"
11#include "cc/resources/ui_resource_client.h"
12
13namespace cc {
14
15class LayerTreeImpl;
16class ScrollView;
17
18class CC_EXPORT PaintedScrollbarLayerImpl : public ScrollbarLayerImplBase {
19 public:
20  static scoped_ptr<PaintedScrollbarLayerImpl> Create(
21      LayerTreeImpl* tree_impl,
22      int id,
23      ScrollbarOrientation orientation);
24  virtual ~PaintedScrollbarLayerImpl();
25
26  // LayerImpl implementation.
27  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
28      OVERRIDE;
29  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
30
31  virtual bool WillDraw(DrawMode draw_mode,
32                        ResourceProvider* resource_provider) OVERRIDE;
33  virtual void AppendQuads(QuadSink* quad_sink,
34                           AppendQuadsData* append_quads_data) OVERRIDE;
35
36  void SetThumbThickness(int thumb_thickness);
37  void SetThumbLength(int thumb_length);
38  void SetTrackStart(int track_start);
39  void SetTrackLength(int track_length);
40
41  void set_track_ui_resource_id(UIResourceId uid) {
42    track_ui_resource_id_ = uid;
43  }
44  void set_thumb_ui_resource_id(UIResourceId uid) {
45    thumb_ui_resource_id_ = uid;
46  }
47
48 protected:
49  PaintedScrollbarLayerImpl(LayerTreeImpl* tree_impl,
50                            int id,
51                            ScrollbarOrientation orientation);
52
53  // ScrollbarLayerImplBase implementation.
54  virtual int ThumbThickness() const OVERRIDE;
55  virtual int ThumbLength() const OVERRIDE;
56  virtual float TrackLength() const OVERRIDE;
57  virtual int TrackStart() const OVERRIDE;
58
59 private:
60  virtual const char* LayerTypeAsString() const OVERRIDE;
61
62  UIResourceId track_ui_resource_id_;
63  UIResourceId thumb_ui_resource_id_;
64
65  int thumb_thickness_;
66  int thumb_length_;
67  int track_start_;
68  int track_length_;
69
70  // Difference between the clip layer's height and the visible viewport
71  // height (which may differ in the presence of top-controls hiding).
72  float vertical_adjust_;
73
74  int scroll_layer_id_;
75
76  DISALLOW_COPY_AND_ASSIGN(PaintedScrollbarLayerImpl);
77};
78
79}  // namespace cc
80#endif  // CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_
81