Rotate screen in response to accelerator or device orientation sensors.

athena/screen/screen_accelerator_handler.cc

 // Copyright 2014 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 "athena/screen/screen_accelerator_handler.h"
 
 #include "athena/input/public/accelerator_manager.h"
+#include "athena/screen/public/screen_manager.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/compositor/debug_utils.h"
 #include "ui/wm/public/activation_client.h"
 
 namespace athena {
 namespace {
 
 enum Command {
   CMD_PRINT_LAYER_HIERARCHY,
   CMD_PRINT_WINDOW_HIERARCHY,
+  CMD_ROTATE_SCREEN,
 };
 
 const int EF_ALL_DOWN =
     ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN;
 
 const AcceleratorData accelerator_data[] = {
     {TRIGGER_ON_PRESS, ui::VKEY_L, EF_ALL_DOWN, CMD_PRINT_LAYER_HIERARCHY,
      AF_DEBUG},
     {TRIGGER_ON_PRESS, ui::VKEY_W, EF_ALL_DOWN, CMD_PRINT_WINDOW_HIERARCHY,
      AF_DEBUG},
+    {TRIGGER_ON_PRESS, ui::VKEY_F3,
+     ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN,
+     CMD_ROTATE_SCREEN, AF_NONE},
 };
 
 void PrintLayerHierarchy(aura::Window* root_window) {
   ui::PrintLayerHierarchy(
       root_window->layer(),
       root_window->GetHost()->dispatcher()->GetLastMouseLocationInRoot());
 }
 
 void PrintWindowHierarchy(aura::Window* window,
                           aura::Window* active,
@@ skipping 16 matching lines @@
 void HandlePrintWindowHierarchy(aura::Window* root_window) {
   aura::Window* active =
       aura::client::GetActivationClient(root_window)->GetActiveWindow();
   std::ostringstream out;
   out << "RootWindow :\n";
   PrintWindowHierarchy(root_window, active, 0, &out);
   // Error so logs can be collected from end-users.
   LOG(ERROR) << out.str();
 }
 
+void HandleRotateScreen() {
+  ScreenManager* screen_manager = ScreenManager::Get();
+  gfx::Display::Rotation current_rotation = screen_manager->GetRotation();
+  if (current_rotation == gfx::Display::ROTATE_0)
+    screen_manager->SetRotation(gfx::Display::ROTATE_90);
+  else if (current_rotation == gfx::Display::ROTATE_90)
+    screen_manager->SetRotation(gfx::Display::ROTATE_180);
+  else if (current_rotation == gfx::Display::ROTATE_180)
+    screen_manager->SetRotation(gfx::Display::ROTATE_270);
+  else if (current_rotation == gfx::Display::ROTATE_270)
+    screen_manager->SetRotation(gfx::Display::ROTATE_0);
+}
+
 }  // namespace
 
 // static
 ScreenAcceleratorHandler::ScreenAcceleratorHandler(aura::Window* root_window)
     : root_window_(root_window) {
   AcceleratorManager::Get()->RegisterAccelerators(
       accelerator_data, arraysize(accelerator_data), this);
 }
 
 ScreenAcceleratorHandler::~ScreenAcceleratorHandler() {
 }
 
 bool ScreenAcceleratorHandler::IsCommandEnabled(int command_id) const {
   return true;
 }
 
 bool ScreenAcceleratorHandler::OnAcceleratorFired(
     int command_id,
     const ui::Accelerator& accelerator) {
   switch (command_id) {
     case CMD_PRINT_LAYER_HIERARCHY:
       PrintLayerHierarchy(root_window_);
       return true;
     case CMD_PRINT_WINDOW_HIERARCHY:
       HandlePrintWindowHierarchy(root_window_);
       return true;
+    case CMD_ROTATE_SCREEN:
+      HandleRotateScreen();
+      return true;
   }
   return false;
 }
 
 }  // namesapce athena