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Unified Diff: cc/layers/painted_overlay_scrollbar_layer.h

Issue 2591863003: Use nine-patch resource for drawing Aura overlay scrollbar thumb. (Closed)
Patch Set: Addressed sadrul@'s feedback Created 3 years, 10 months ago
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Index: cc/layers/painted_overlay_scrollbar_layer.h
diff --git a/cc/layers/painted_overlay_scrollbar_layer.h b/cc/layers/painted_overlay_scrollbar_layer.h
new file mode 100644
index 0000000000000000000000000000000000000000..6888bec7ce6217d53f59b744d5d6ffe6bafafa9d
--- /dev/null
+++ b/cc/layers/painted_overlay_scrollbar_layer.h
@@ -0,0 +1,77 @@
+// 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/base/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,
+ int scroll_layer_id);
+
+ bool OpacityCanAnimateOnImplThread() const override;
+ bool AlwaysUseActiveTreeOpacity() const override;
+ ScrollbarLayerInterface* ToScrollbarLayer() override;
+
+ // ScrollbarLayerInterface
+ int ScrollLayerId() const override;
+ void SetScrollLayer(int layer_id) override;
+ ScrollbarOrientation orientation() const override;
+
+ // Layer interface
+ bool Update() override;
+ void SetLayerTreeHost(LayerTreeHost* host) override;
+ void PushPropertiesTo(LayerImpl* layer) override;
+
+ protected:
+ PaintedOverlayScrollbarLayer(std::unique_ptr<Scrollbar> scrollbar,
+ int scroll_layer_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();
+
+ std::unique_ptr<Scrollbar> scrollbar_;
+ int scroll_layer_id_;
+
+ int thumb_thickness_;
+ int thumb_length_;
+ gfx::Point location_;
+ gfx::Rect track_rect_;
+
+ gfx::Rect aperture_;
+
+ std::unique_ptr<ScopedUIResource> thumb_resource_;
+
+ DISALLOW_COPY_AND_ASSIGN(PaintedOverlayScrollbarLayer);
+};
+
+} // namespace cc
+
+#endif // CC_LAYERS_PAINTED_OVERLAY_SCROLLBAR_LAYER_H_

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