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.
5 #ifndef CC_LAYERS_PAINTED_SCROLLBAR_LAYER_H_
6 #define CC_LAYERS_PAINTED_SCROLLBAR_LAYER_H_
8 #include "cc/base/cc_export.h"
9 #include "cc/input/scrollbar.h"
10 #include "cc/layers/contents_scaling_layer.h"
11 #include "cc/layers/scrollbar_layer_interface.h"
12 #include "cc/layers/scrollbar_theme_painter.h"
13 #include "cc/resources/layer_updater.h"
14 #include "cc/resources/scoped_ui_resource.h"
17 class ScrollbarThemeComposite;
19 class CC_EXPORT PaintedScrollbarLayer : public ScrollbarLayerInterface,
20 public ContentsScalingLayer {
22 virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl)
25 static scoped_refptr<PaintedScrollbarLayer> Create(
26 scoped_ptr<Scrollbar> scrollbar,
29 virtual bool OpacityCanAnimateOnImplThread() const OVERRIDE;
30 virtual ScrollbarLayerInterface* ToScrollbarLayer() OVERRIDE;
32 // ScrollbarLayerInterface
33 virtual int ScrollLayerId() const OVERRIDE;
34 virtual void SetScrollLayer(int layer_id) OVERRIDE;
35 virtual void SetClipLayer(int layer_id) OVERRIDE;
37 virtual ScrollbarOrientation orientation() const OVERRIDE;
40 virtual bool Update(ResourceUpdateQueue* queue,
41 const OcclusionTracker* occlusion) OVERRIDE;
42 virtual void SetLayerTreeHost(LayerTreeHost* host) OVERRIDE;
43 virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
44 virtual void PushScrollClipPropertiesTo(LayerImpl* layer) OVERRIDE;
45 virtual void CalculateContentsScale(float ideal_contents_scale,
46 float device_scale_factor,
47 float page_scale_factor,
48 bool animating_transform_to_screen,
49 float* contents_scale_x,
50 float* contents_scale_y,
51 gfx::Size* content_bounds) OVERRIDE;
54 PaintedScrollbarLayer(scoped_ptr<Scrollbar> scrollbar, int scroll_layer_id);
55 virtual ~PaintedScrollbarLayer();
58 UIResourceId track_resource_id() {
59 return track_resource_.get() ? track_resource_->id() : 0;
61 UIResourceId thumb_resource_id() {
62 return thumb_resource_.get() ? thumb_resource_->id() : 0;
64 void UpdateThumbAndTrackGeometry();
67 gfx::Rect ScrollbarLayerRectToContentRect(const gfx::Rect& layer_rect) const;
68 gfx::Rect OriginThumbRect() const;
70 template<typename T> void UpdateProperty(T value, T* prop) {
74 SetNeedsPushProperties();
78 float ClampScaleToMaxTextureSize(float scale);
80 UIResourceBitmap RasterizeScrollbarPart(const gfx::Rect& rect,
83 scoped_ptr<Scrollbar> scrollbar_;
87 // Snapshot of properties taken in UpdateThumbAndTrackGeometry and used in
92 gfx::Rect track_rect_;
96 scoped_ptr<ScopedUIResource> track_resource_;
97 scoped_ptr<ScopedUIResource> thumb_resource_;
99 DISALLOW_COPY_AND_ASSIGN(PaintedScrollbarLayer);
104 #endif // CC_LAYERS_PAINTED_SCROLLBAR_LAYER_H_