UI Resource Manager

cc/layers/picture_scrollbar_layer_impl.h

+// Copyright 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_LAYERS_PICTURE_SCROLLBAR_LAYER_IMPL_H_
+#define CC_LAYERS_PICTURE_SCROLLBAR_LAYER_IMPL_H_
+
+#include "cc/base/cc_export.h"
+
+#if !USE_REGULAR_SCROLLBAR
+
+#include "cc/input/scrollbar.h"
+#include "cc/layers/layer_impl.h"
+#include "cc/resources/ui_resource_manager.h"
+
+namespace cc {
+
+class LayerTreeImpl;
+class ScrollView;
+
+class CC_EXPORT ScrollbarLayerImpl : public LayerImpl {
+ public:
+  static scoped_ptr<ScrollbarLayerImpl> Create(
+      LayerTreeImpl* tree_impl,
+      int id,
+      ScrollbarOrientation orientation);
+  virtual ~ScrollbarLayerImpl();
+
+  // LayerImpl implementation.
+  virtual ScrollbarLayerImpl* ToScrollbarLayer() OVERRIDE;
+  virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
+      OVERRIDE;
+  virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
+
+  virtual bool WillDraw(DrawMode draw_mode,
+                        ResourceProvider* resource_provider) OVERRIDE;
+  virtual void AppendQuads(QuadSink* quad_sink,
+                           AppendQuadsData* append_quads_data) OVERRIDE;
+
+  virtual void DidLoseOutputSurface() OVERRIDE;
+
+  int scroll_layer_id() const { return scroll_layer_id_; }
+  void set_scroll_layer_id(int id) { scroll_layer_id_ = id; }
+
+  ScrollbarOrientation Orientation() const;
+  float CurrentPos() const;
+  int Maximum() const;
+
+  void set_thumb_thickness(int thumb_thickness) {
+    thumb_thickness_ = thumb_thickness;
+  }
+  void set_thumb_length(int thumb_length) {
+    thumb_length_ = thumb_length;
+  }
+  void set_track_start(int track_start) {
+    track_start_ = track_start;
+  }
+  void set_track_length(int track_length) {
+    track_length_ = track_length;
+  }
+  void set_vertical_adjust(float vertical_adjust) {
+    vertical_adjust_ = vertical_adjust;
+  }
+  void set_track_resource_id(ResourceProvider::ResourceId id) {
+  }
+  void set_thumb_resource_id(ResourceProvider::ResourceId id) {
+  }
+  void set_visible_to_total_length_ratio(float ratio) {
+    visible_to_total_length_ratio_ = ratio;
+  }
+
+  void SetCurrentPos(float current_pos) { current_pos_ = current_pos; }
+  void SetMaximum(int maximum) { maximum_ = maximum; }
+
+  gfx::Rect ComputeThumbQuadRect() const;
+
+  void set_track_ui_resource_id(UIResourceId id);
+  void set_thumb_ui_resource_id(UIResourceId id);
+
+ protected:
+  ScrollbarLayerImpl(LayerTreeImpl* tree_impl,
+                     int id,
+                     ScrollbarOrientation orientation);
+
+ private:
+  virtual const char* LayerTypeAsString() const OVERRIDE;
+
+  gfx::Rect ScrollbarLayerRectToContentRect(gfx::RectF layer_rect) const;
+
+  float current_pos_;
+  int maximum_;
+  int thumb_thickness_;
+  int thumb_length_;
+  int track_start_;
+  int track_length_;
+  ScrollbarOrientation orientation_;
+
+  // Difference between the clip layer's height and the visible viewport
+  // height (which may differ in the presence of top-controls hiding).
+  float vertical_adjust_;
+
+  float visible_to_total_length_ratio_;
+
+  int scroll_layer_id_;
+
+  UIResourceId track_ui_resource_id_;
+  UIResourceId thumb_ui_resource_id_;
+
+  bool is_scrollable_area_active_;
+  bool is_scroll_view_scrollbar_;
+  bool enabled_;
+  bool is_custom_scrollbar_;
+  bool is_overlay_scrollbar_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScrollbarLayerImpl);
+};
+
+}  // namespace cc
+
+#endif
+
+#endif  // CC_LAYERS_PICTURE_SCROLLBAR_LAYER_IMPL_H_