Animated Rotation

views/animation/screen_rotation_setter.h

+// Copyright (c) 2011 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 VIEWS_ANIMATION_SCREEN_ROTATION_SETTER_H_
+#define VIEWS_ANIMATION_SCREEN_ROTATION_SETTER_H_
+#pragma once
+
+#include "base/memory/scoped_ptr.h"
+#include "views/animation/screen_rotation.h"
+#include "views/layer_property_setter.h"
+
+namespace ui {
+class Transform;
+}
+
+namespace views {
+
+class View;
+
+// A screen rotation setter is a LayerPropertySetter that initiates screen
+// rotations in response to calls to |SetTransform|. Calls to |SetBounds| are
+// applied to the layer immediately.
+class ScreenRotationSetter : public LayerPropertySetter,
+                             public ScreenRotationListener {
+ public:
+  ScreenRotationSetter(View* view);
+
+  // implementation of LayerPropertySetter
+  virtual void Installed(ui::Layer* layer) OVERRIDE;
+  virtual void Uninstalled(ui::Layer* layer) OVERRIDE;
+  virtual void SetTransform(ui::Layer* layer,
+                            const ui::Transform& transform) OVERRIDE;
+  virtual void SetBounds(ui::Layer* layer, const gfx::Rect& bounds) OVERRIDE;
+
+  // implementation of ScreenRotationListener
+  virtual void OnScreenRotationCompleted(ScreenRotation* rotation) OVERRIDE;
+
+ private:
+  // This is the currently animating rotation. We hang onto it so that if a
+  // call to |SetTransform| is made during the rotation, we can update the
+  // target orientation of this rotation.
+  scoped_ptr<ScreenRotation> rotation_;
+
+  // The screen rotation setter is associated with a view so that the view's
+  // bounds may be set when the animation completes.
+  View* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenRotationSetter);
+};
+
+} // namespace views
+
+#endif // VIEWS_ANIMATION_SCREEN_ROTATION_SETTER_H_