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   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(RenderPass* render_pass,
  34                            const Occlusion& occlusion_in_content_space,
  35                            AppendQuadsData* append_quads_data) override;
  36
  37   void SetThumbThickness(int thumb_thickness);
  38   void SetThumbLength(int thumb_length);
  39   void SetTrackStart(int track_start);
  40   void SetTrackLength(int track_length);
  41
  42   void set_track_ui_resource_id(UIResourceId uid) {
  43     track_ui_resource_id_ = uid;
  44   }
  45   void set_thumb_ui_resource_id(UIResourceId uid) {
  46     thumb_ui_resource_id_ = uid;
  47   }
  48
  49  protected:
  50   PaintedScrollbarLayerImpl(LayerTreeImpl* tree_impl,
  51                             int id,
  52                             ScrollbarOrientation orientation);
  53
  54   // ScrollbarLayerImplBase implementation.
  55   virtual int ThumbThickness() const override;
  56   virtual int ThumbLength() const override;
  57   virtual float TrackLength() const override;
  58   virtual int TrackStart() const override;
  59   virtual bool IsThumbResizable() const override;
  60
  61  private:
  62   virtual const char* LayerTypeAsString() const override;
  63
  64   UIResourceId track_ui_resource_id_;
  65   UIResourceId thumb_ui_resource_id_;
  66
  67   int thumb_thickness_;
  68   int thumb_length_;
  69   int track_start_;
  70   int track_length_;
  71
  72   // Difference between the clip layer's height and the visible viewport
  73   // height (which may differ in the presence of top-controls hiding).
  74   float vertical_adjust_;
  75
  76   int scroll_layer_id_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(PaintedScrollbarLayerImpl);
  79 };
  80
  81 }  // namespace cc
  82 #endif  // CC_LAYERS_PAINTED_SCROLLBAR_LAYER_IMPL_H_