| // Copyright 2016 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_PAINTED_OVERLAY_SCROLLBAR_LAYER_H_ |
| #define CC_LAYERS_PAINTED_OVERLAY_SCROLLBAR_LAYER_H_ |
| |
| #include "base/macros.h" |
| #include "cc/cc_export.h" |
| #include "cc/input/scrollbar.h" |
| #include "cc/layers/layer.h" |
| #include "cc/layers/scrollbar_layer_interface.h" |
| #include "cc/layers/scrollbar_theme_painter.h" |
| #include "cc/resources/scoped_ui_resource.h" |
| |
| namespace cc { |
| |
| class CC_EXPORT PaintedOverlayScrollbarLayer : public ScrollbarLayerInterface, |
| public Layer { |
| public: |
| std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override; |
| |
| static scoped_refptr<PaintedOverlayScrollbarLayer> Create( |
| std::unique_ptr<Scrollbar> scrollbar, |
| ElementId scroll_element_id = ElementId()); |
| |
| bool OpacityCanAnimateOnImplThread() const override; |
| |
| // ScrollbarLayerInterface |
| void SetScrollElementId(ElementId element_id) override; |
| |
| // Layer interface |
| bool Update() override; |
| void SetLayerTreeHost(LayerTreeHost* host) override; |
| void PushPropertiesTo(LayerImpl* layer) override; |
| |
| protected: |
| PaintedOverlayScrollbarLayer(std::unique_ptr<Scrollbar> scrollbar, |
| ElementId scroll_element_id); |
| ~PaintedOverlayScrollbarLayer() override; |
| |
| private: |
| gfx::Rect OriginThumbRectForPainting() const; |
| |
| template <typename T> |
| bool UpdateProperty(T value, T* prop) { |
| if (*prop == value) |
| return false; |
| *prop = value; |
| SetNeedsPushProperties(); |
| return true; |
| } |
| |
| bool PaintThumbIfNeeded(); |
| bool PaintTickmarks(); |
| |
| std::unique_ptr<Scrollbar> scrollbar_; |
| ElementId scroll_element_id_; |
| |
| int thumb_thickness_; |
| int thumb_length_; |
| gfx::Point location_; |
| gfx::Rect track_rect_; |
| |
| gfx::Rect aperture_; |
| |
| std::unique_ptr<ScopedUIResource> thumb_resource_; |
| std::unique_ptr<ScopedUIResource> track_resource_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PaintedOverlayScrollbarLayer); |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_LAYERS_PAINTED_OVERLAY_SCROLLBAR_LAYER_H_ |