ash/wm/capture_controller.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/wm/capture_controller.h"
   6
   7 #include "ash/shell.h"
   8 #include "ui/aura/window.h"
   9 #include "ui/aura/root_window.h"
  10
  11 namespace ash {
  12 namespace internal {
  13
  14 ////////////////////////////////////////////////////////////////////////////////
  15 // CaptureController, public:
  16
  17 CaptureController::CaptureController()
  18     : capture_window_(NULL) {
  19 }
  20
  21 CaptureController::~CaptureController() {
  22 }
  23
  24 ////////////////////////////////////////////////////////////////////////////////
  25 // CaptureController, client::CaptureClient implementation:
  26
  27 void CaptureController::SetCapture(aura::Window* new_capture_window) {
  28   if (capture_window_ == new_capture_window)
  29     return;
  30   // Make sure window has a root window.
  31   DCHECK(!new_capture_window || new_capture_window->GetRootWindow());
  32   DCHECK(!capture_window_ || capture_window_->GetRootWindow());
  33
  34   aura::Window* old_capture_window = capture_window_;
  35
  36   Shell::RootWindowList root_windows = Shell::GetAllRootWindows();
  37   for (Shell::RootWindowList::iterator iter = root_windows.begin();
  38        iter != root_windows.end(); ++iter) {
  39     aura::RootWindow* root_window = *iter;
  40     root_window->gesture_recognizer()->
  41         TransferEventsTo(old_capture_window, new_capture_window);
  42   }
  43
  44   capture_window_ = new_capture_window;
  45
  46   for (Shell::RootWindowList::iterator iter = root_windows.begin();
  47        iter != root_windows.end(); ++iter) {
  48     aura::RootWindow* root_window = *iter;
  49     root_window->UpdateCapture(old_capture_window, new_capture_window);
  50   }
  51
  52   return;
  53 }
  54
  55 void CaptureController::ReleaseCapture(aura::Window* window) {
  56   if (capture_window_ != window)
  57     return;
  58   SetCapture(NULL);
  59 }
  60
  61 aura::Window* CaptureController::GetCaptureWindow() {
  62   return capture_window_;
  63 }
  64
  65 }  // namespace internal
  66 }  // namespace ash