Animated Rotation

chrome/browser/ui/touch/frame/touch_browser_frame_view.cc

 // 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.
 
 #include "chrome/browser/ui/touch/frame/touch_browser_frame_view.h"
 
+#include "chrome/browser/ui/touch/animation/screen_rotation_setter.h"
 #include "chrome/browser/ui/touch/keyboard/keyboard_manager.h"
 #include "views/controls/button/image_button.h"
+#include "views/desktop/desktop_window_view.h"
+#include "ui/gfx/transform.h"
+
+namespace {
+
+ui::Transform SideToTransform(sensors::ScreenOrientation::Side side,
+                              const ui::Transform& old_transform,
+                              const gfx::Size& size) {
+  gfx::Point origin;
+  gfx::Point bottom_right(size.width(), size.height());
+  old_transform.TransformPoint(origin);
+  old_transform.TransformPoint(bottom_right);
+  int original_width = abs(origin.x() - bottom_right.x());
+  int original_height = abs(origin.y() - bottom_right.y());
+  ui::Transform to_return;
+  switch (side) {
+    case sensors::ScreenOrientation::TOP: break;
+    case sensors::ScreenOrientation::RIGHT:
+      to_return.ConcatRotate(90);
+      to_return.ConcatTranslate(original_width, 0);
+      break;
+    case sensors::ScreenOrientation::LEFT:
+      to_return.ConcatRotate(-90);
+      to_return.ConcatTranslate(0, original_height);
+      break;
+    case sensors::ScreenOrientation::BOTTOM:
+      to_return.ConcatRotate(180);
+      to_return.ConcatTranslate(original_width, original_height);
+      break;
+    default:
+      to_return = old_transform;
+      break;
+  }
+  return to_return;
+}
+
+}  // namespace
 
 // static
 const char TouchBrowserFrameView::kViewClassName[] =
     "browser/ui/touch/frame/TouchBrowserFrameView";
 
 ///////////////////////////////////////////////////////////////////////////////
 // TouchBrowserFrameView, public:
 
 TouchBrowserFrameView::TouchBrowserFrameView(BrowserFrame* frame,
                                              BrowserView* browser_view)
     : OpaqueBrowserFrameView(frame, browser_view) {
   // Make sure the singleton KeyboardManager object is initialized.
   KeyboardManager::GetInstance();
+  sensors::Provider::GetInstance()->AddListener(this);
 }
 
 TouchBrowserFrameView::~TouchBrowserFrameView() {
+ sensors::Provider::GetInstance()->RemoveListener(this);
 }
 
 std::string TouchBrowserFrameView::GetClassName() const {
   return kViewClassName;
 }
 
 bool TouchBrowserFrameView::HitTest(const gfx::Point& point) const {
   if (OpaqueBrowserFrameView::HitTest(point))
     return true;
 
   if (close_button()->IsVisible() &&
       close_button()->GetMirroredBounds().Contains(point))
     return true;
   if (restore_button()->IsVisible() &&
       restore_button()->GetMirroredBounds().Contains(point))
     return true;
   if (maximize_button()->IsVisible() &&
       maximize_button()->GetMirroredBounds().Contains(point))
     return true;
   if (minimize_button()->IsVisible() &&
       minimize_button()->GetMirroredBounds().Contains(point))
     return true;
 
   return false;
 }
+
+void TouchBrowserFrameView::OnScreenOrientationChanged(
+    const sensors::ScreenOrientation& change) {
+  // In views desktop mode, then the desktop_window_view will not be NULL and
+  // is the view to be rotated.
+  views::View* to_rotate =
+      views::desktop::DesktopWindowView::desktop_window_view;
+
+  if (!to_rotate) {
+    // Otherwise, rotate the widget's view.
+    views::Widget* widget = GetWidget();
+    to_rotate = widget->GetRootView();
+  }
+
+  if (!initialized_screen_rotation_) {
+      to_rotate->SetPaintToLayer(true);
+      to_rotate->SetLayerPropertySetter(
+          ScreenRotationSetterFactory::Create(to_rotate));
+      initialized_screen_rotation_ = true;
+  }
+
+  ui::Transform xform = SideToTransform(change.upward,
+                                        to_rotate->GetTransform(),
+                                        to_rotate->size());
+  to_rotate->SetTransform(xform);
+}
+