Animated Rotation

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

Index: chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
diff --git a/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc b/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
index b1ae5b4e448f79eb5900b069d3b4ab81d56e0130..dcaa9d20a99b05c198628e2a43c49d758641794b 100644
--- a/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
+++ b/chrome/browser/ui/touch/frame/touch_browser_frame_view.cc
@@ -23,6 +23,8 @@
 #include "ui/base/animation/slide_animation.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/transform.h"
+#include "views/animation/screen_rotation.h"
+#include "views/desktop/desktop_window_view.h"
 #include "views/controls/button/image_button.h"
 #include "views/controls/textfield/textfield.h"
 #include "views/focus/focus_manager.h"
@@ -46,6 +48,15 @@ bool TabContentsHasFocus(const TabContents* contents) {
   return view->Contains(view->GetFocusManager()->GetFocusedView());
 }
 
+int SideToDegrees(sensors::ScreenOrientation::Side side) {
+  switch (side) {
+    case sensors::ScreenOrientation::RIGHT: return 90;
+    case sensors::ScreenOrientation::LEFT: return -90;
+    case sensors::ScreenOrientation::BOTTOM: return 180;
+    default: return 0;
+  }
+}
+
 }  // namespace
 
 // static
@@ -61,7 +72,8 @@ TouchBrowserFrameView::TouchBrowserFrameView(BrowserFrame* frame,
       keyboard_showing_(false),
       keyboard_height_(kDefaultKeyboardHeight),
       focus_listener_added_(false),
-      keyboard_(NULL) {
+      keyboard_(NULL),
+      up_(sensors::ScreenOrientation::TOP) {
   registrar_.Add(this,
                  content::NOTIFICATION_NAV_ENTRY_COMMITTED,
                  NotificationService::AllSources());
@@ -92,10 +104,13 @@ TouchBrowserFrameView::TouchBrowserFrameView(BrowserFrame* frame,
       chromeos::input_method::InputMethodManager::GetInstance();
   manager->AddVirtualKeyboardObserver(this);
 #endif
+
+  sensors::Provider::GetInstance()->AddListener(this);
 }
 
 TouchBrowserFrameView::~TouchBrowserFrameView() {
   browser_view()->browser()->tabstrip_model()->RemoveObserver(this);
+  sensors::Provider::GetInstance()->RemoveListener(this);
 }
 
 std::string TouchBrowserFrameView::GetClassName() const {
@@ -361,6 +376,25 @@ void TouchBrowserFrameView::AnimationEnded(const ui::Animation* animation) {
   SchedulePaint();
 }
 
+void TouchBrowserFrameView::OnScreenOrientationChanged(
+    const sensors::ScreenOrientation& change) {
+
+  views::View* to_rotate =
+      views::desktop::DesktopWindowView::desktop_window_view;
+
+  if (!to_rotate) {
+    views::Widget* widget = GetWidget();
+    to_rotate = widget->GetRootView();
+  }
+
+  views::ScreenRotation::Perform(
+      to_rotate,
+      SideToDegrees(up_),
+      SideToDegrees(change.upward));

[cwolfe, 2011/07/21 17:47:01]

ScreenOrientation::FRONT and ::BACK should probably leave the screen at whatever
the current rotation is. Believe this code will snap back to 0 rotation whenever
the sensor reports "face down" or "face up".

Can call this a nit, since the demo won't generate either FRONT or BACK.

+
+  up_ = change.upward;
+}
+
 #if defined(OS_CHROMEOS)
 void TouchBrowserFrameView::VirtualKeyboardChanged(
     chromeos::input_method::InputMethodManager* manager,