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// 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_SCROLLBAR_LAYER_IMPL_H_
#define CC_LAYERS_SCROLLBAR_LAYER_IMPL_H_
#include "cc/base/cc_export.h"
#include "cc/input/scrollbar.h"
#include "cc/layers/layer_impl.h"
#include "cc/resources/ui_resource_client.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;
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;
}
int thumb_thickness() const { return 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_ui_resource_id(UIResourceId uid) {
track_ui_resource_id_ = uid;
}
void set_thumb_ui_resource_id(UIResourceId uid) {
thumb_ui_resource_id_ = uid;
}
void set_visible_to_total_length_ratio(float ratio) {
visible_to_total_length_ratio_ = ratio;
}
void set_is_overlay_scrollbar(bool is_overlay_scrollbar) {
is_overlay_scrollbar_ = is_overlay_scrollbar;
}
bool is_overlay_scrollbar() const { return is_overlay_scrollbar_; }
void SetCurrentPos(float current_pos) { current_pos_ = current_pos; }
void SetMaximum(int maximum) { maximum_ = maximum; }
gfx::Rect ComputeThumbQuadRect() const;
protected:
ScrollbarLayerImpl(LayerTreeImpl* tree_impl,
int id,
ScrollbarOrientation orientation);
private:
virtual const char* LayerTypeAsString() const OVERRIDE;
gfx::Rect ScrollbarLayerRectToContentRect(gfx::RectF layer_rect) const;
UIResourceId track_ui_resource_id_;
UIResourceId thumb_ui_resource_id_;
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_;
bool is_overlay_scrollbar_;
DISALLOW_COPY_AND_ASSIGN(ScrollbarLayerImpl);
};
} // namespace cc
#endif // CC_LAYERS_SCROLLBAR_LAYER_IMPL_H_
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