cc/layers/painted_scrollbar_layer_impl.h

   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
  13 namespace cc {
  14
  15 class LayerTreeImpl;
  16 class ScrollView;
  17
  18 class CC_EXPORT PaintedScrollbarLayerImpl : public ScrollbarLayerImplBase {
  19  public:
  20   static scoped_ptr<PaintedScrollbarLayerImpl> Create(
  21       LayerTreeImpl* tree_impl,
  22       int id,
  23       ScrollbarOrientation orientation);
  24   ~PaintedScrollbarLayerImpl() override;
  25
  26   // LayerImpl implementation.
  27   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
  28   void PushPropertiesTo(LayerImpl* layer) override;
  29
  30   bool WillDraw(DrawMode draw_mode,
  31                 ResourceProvider* resource_provider) override;
  32   void AppendQuads(RenderPass* render_pass,
  33                    const Occlusion& occlusion_in_content_space,
  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   int ThumbThickness() const override;
  55   int ThumbLength() const override;
  56   float TrackLength() const override;
  57   int TrackStart() const override;
  58   bool IsThumbResizable() const override;
  59
  60  private:
  61   const char* LayerTypeAsString() const override;
  62
  63   UIResourceId track_ui_resource_id_;
  64   UIResourceId thumb_ui_resource_id_;
  65
  66   int thumb_thickness_;
  67   int thumb_length_;
  68   int track_start_;
  69   int track_length_;
  70
  71   // Difference between the clip layer's height and the visible viewport
  72   // height (which may differ in the presence of top-controls hiding).
  73   float vertical_adjust_;
  74
  75   int scroll_layer_id_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(PaintedScrollbarLayerImpl);
  78 };
  79
  80 }  // namespace cc
  81 #endif  // CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_