ash: Add a heads-up display to track touch-point states and positions.

ash/shell.cc

 // Copyright (c) 2012 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 "ash/shell.h"
 
 #include <algorithm>
 #include <string>
 
 #include "ash/ash_switches.h"
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/desktop_background/desktop_background_resources.h"
 #include "ash/desktop_background/desktop_background_view.h"
 #include "ash/drag_drop/drag_drop_controller.h"
 #include "ash/focus_cycler.h"
 #include "ash/launcher/launcher.h"
 #include "ash/magnifier/magnification_controller.h"
 #include "ash/monitor/monitor_controller.h"
 #include "ash/monitor/multi_monitor_manager.h"
 #include "ash/screen_ash.h"
 #include "ash/shell_context_menu.h"
 #include "ash/shell_delegate.h"
 #include "ash/shell_factory.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/bluetooth/bluetooth_observer.h"
 #include "ash/system/network/network_observer.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/tooltips/tooltip_controller.h"
+#include "ash/touch/touch_observer_hud.h"
 #include "ash/wm/activation_controller.h"
 #include "ash/wm/app_list_controller.h"
 #include "ash/wm/base_layout_manager.h"
 #include "ash/wm/custom_frame_view_ash.h"
 #include "ash/wm/dialog_frame_view.h"
 #include "ash/wm/event_client_impl.h"
 #include "ash/wm/key_rewriter_event_filter.h"
 #include "ash/wm/panel_layout_manager.h"
 #include "ash/wm/panel_window_event_filter.h"
 #include "ash/wm/partial_screenshot_event_filter.h"
@@ skipping 506 matching lines @@
 
 Shell::~Shell() {
   RemoveRootWindowEventFilter(key_rewriter_filter_.get());
   RemoveRootWindowEventFilter(partial_screenshot_filter_.get());
   RemoveRootWindowEventFilter(input_method_filter_.get());
   RemoveRootWindowEventFilter(window_modality_controller_.get());
   RemoveRootWindowEventFilter(system_gesture_filter_.get());
 #if !defined(OS_MACOSX)
   RemoveRootWindowEventFilter(accelerator_filter_.get());
 #endif
+  if (touch_observer_hud_.get())
+    RemoveRootWindowEventFilter(touch_observer_hud_.get());
 
   // Close background widget now so that the focus manager of the
   // widget gets deleted in the final message loop run.
   root_window_layout_->SetBackgroundWidget(NULL);
 
   // TooltipController is deleted with the Shell so removing its references.
   RemoveRootWindowEventFilter(tooltip_controller_.get());
   aura::client::SetTooltipClient(GetRootWindow(), NULL);
 
   // Make sure we delete WorkspaceController before launcher is
@@ skipping 111 matching lines @@
   AddRootWindowEventFilter(system_gesture_filter_.get());
 
   root_window->SetCursor(ui::kCursorPointer);
   if (initially_hide_cursor_)
     root_window->ShowCursor(false);
 
   activation_controller_.reset(new internal::ActivationController);
 
   CreateSpecialContainers(root_window);
 
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+
+  if (command_line->HasSwitch(switches::kAshTouchHud)) {
+    touch_observer_hud_.reset(new internal::TouchObserverHUD);
+    AddRootWindowEventFilter(touch_observer_hud_.get());
+  }
+
   stacking_controller_.reset(new internal::StackingController);
 
   root_window_layout_ = new internal::RootWindowLayoutManager(root_window);
   root_window->SetLayoutManager(root_window_layout_);
 
   event_client_.reset(new internal::EventClientImpl(root_window));
 
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
-
   tray_.reset(new SystemTray());
   if (delegate_.get())
     tray_delegate_.reset(delegate_->CreateSystemTrayDelegate(tray_.get()));
   if (!tray_delegate_.get())
     tray_delegate_.reset(new DummySystemTrayDelegate());
   tray_->CreateItems();
   tray_->CreateWidget();
 
   // This controller needs to be set before SetupManagedWindowMode.
   desktop_background_controller_.reset(new DesktopBackgroundController);
@@ skipping 234 matching lines @@
     panel_container->SetLayoutManager(panel_layout_manager_);
   }
 }
 
 void Shell::DisableWorkspaceGridLayout() {
   if (workspace_controller_.get())
     workspace_controller_->workspace_manager()->set_grid_size(0);
 }
 
 }  // namespace ash