1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100


cc / layers / nine_patch_thumb_scrollbar_layer_impl.h [blame]

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_LAYERS_NINE_PATCH_THUMB_SCROLLBAR_LAYER_IMPL_H_
#define CC_LAYERS_NINE_PATCH_THUMB_SCROLLBAR_LAYER_IMPL_H_

#include <memory>
#include <vector>

#include "cc/cc_export.h"
#include "cc/input/scrollbar.h"
#include "cc/layers/nine_patch_generator.h"
#include "cc/layers/scrollbar_layer_impl_base.h"
#include "cc/resources/ui_resource_client.h"

namespace cc {

class LayerTreeImpl;

class CC_EXPORT NinePatchThumbScrollbarLayerImpl
    : public ScrollbarLayerImplBase {
 public:
  static std::unique_ptr<NinePatchThumbScrollbarLayerImpl> Create(
      LayerTreeImpl* tree_impl,
      int id,
      ScrollbarOrientation orientation,
      bool is_left_side_vertical_scrollbar);
  NinePatchThumbScrollbarLayerImpl(const NinePatchThumbScrollbarLayerImpl&) =
      delete;
  NinePatchThumbScrollbarLayerImpl& operator=(
      const NinePatchThumbScrollbarLayerImpl&) = delete;
  ~NinePatchThumbScrollbarLayerImpl() override;

  // LayerImpl implementation.
  mojom::LayerType GetLayerType() const override;
  std::unique_ptr<LayerImpl> CreateLayerImpl(
      LayerTreeImpl* tree_impl) const override;
  void PushPropertiesTo(LayerImpl* layer) override;

  bool WillDraw(DrawMode draw_mode,
                viz::ClientResourceProvider* resource_provider) override;
  void AppendQuads(viz::CompositorRenderPass* render_pass,
                   AppendQuadsData* append_quads_data) override;

  void SetThumbThickness(int thumb_thickness);
  void SetThumbLength(int thumb_length);
  void SetTrackStart(int track_start);
  void SetTrackLength(int track_length);

  void SetImageBounds(const gfx::Size& bounds);
  void SetAperture(const gfx::Rect& aperture);

  void set_thumb_ui_resource_id(UIResourceId uid) {
    thumb_ui_resource_id_ = uid;
  }

  void set_track_and_buttons_ui_resource_id(UIResourceId uid) {
    track_and_buttons_ui_resource_id_ = uid;
  }

 protected:
  NinePatchThumbScrollbarLayerImpl(LayerTreeImpl* tree_impl,
                                   int id,
                                   ScrollbarOrientation orientation,
                                   bool is_left_side_vertical_scrollbar);

  // ScrollbarLayerImplBase implementation.
  int ThumbThickness() const override;
  int ThumbLength() const override;
  float TrackLength() const override;
  int TrackStart() const override;
  bool IsThumbResizable() const override;

 private:
  void AppendThumbQuads(viz::CompositorRenderPass* render_pass,
                        AppendQuadsData* append_quads_data,
                        viz::SharedQuadState* shared_quad_state);

  void AppendTrackAndButtonsQuads(viz::CompositorRenderPass* render_pass,
                                  AppendQuadsData* append_quads_data,
                                  viz::SharedQuadState* shared_quad_state);

  UIResourceId thumb_ui_resource_id_ = 0;
  UIResourceId track_and_buttons_ui_resource_id_ = 0;

  int thumb_thickness_ = 0;
  int thumb_length_ = 0;
  int track_start_ = 0;
  int track_length_ = 0;

  gfx::Size image_bounds_;
  gfx::Rect aperture_;

  NinePatchGenerator quad_generator_;
  std::vector<NinePatchGenerator::Patch> patches_;
};

}  // namespace cc
#endif  // CC_LAYERS_NINE_PATCH_THUMB_SCROLLBAR_LAYER_IMPL_H_