src/ash/wm/system_gesture_event_filter.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/system_gesture_event_filter.h"
   6
   7 #include "ash/ash_switches.h"
   8 #include "ash/metrics/user_metrics_recorder.h"
   9 #include "ash/shell.h"
  10 #include "ash/touch/touch_uma.h"
  11 #include "ash/wm/gestures/long_press_affordance_handler.h"
  12 #include "ash/wm/gestures/overview_gesture_handler.h"
  13 #include "ash/wm/gestures/shelf_gesture_handler.h"
  14 #include "ui/events/event.h"
  15 #include "ui/events/event_constants.h"
  16
  17 #if defined(OS_CHROMEOS) && defined(USE_X11)
  18 #include "ui/events/x/touch_factory_x11.h"
  19 #endif
  20
  21 namespace ash {
  22
  23 SystemGestureEventFilter::SystemGestureEventFilter()
  24     : long_press_affordance_(new LongPressAffordanceHandler),
  25       overview_gesture_handler_(new OverviewGestureHandler),
  26       shelf_gesture_handler_(new ShelfGestureHandler()) {
  27 }
  28
  29 SystemGestureEventFilter::~SystemGestureEventFilter() {
  30 }
  31
  32 void SystemGestureEventFilter::OnMouseEvent(ui::MouseEvent* event) {
  33 #if defined(OS_CHROMEOS) && defined(USE_X11)
  34   if (event->type() == ui::ET_MOUSE_PRESSED && event->native_event() &&
  35       ui::TouchFactory::GetInstance()->IsTouchDevicePresent() &&
  36       Shell::GetInstance()->delegate()) {
  37     Shell::GetInstance()->metrics()->RecordUserMetricsAction(UMA_MOUSE_DOWN);
  38   }
  39 #endif
  40 }
  41
  42 void SystemGestureEventFilter::OnScrollEvent(ui::ScrollEvent* event) {
  43   if (overview_gesture_handler_ &&
  44       overview_gesture_handler_->ProcessScrollEvent(*event)) {
  45     event->StopPropagation();
  46   }
  47 }
  48
  49 void SystemGestureEventFilter::OnTouchEvent(ui::TouchEvent* event) {
  50   aura::Window* target = static_cast<aura::Window*>(event->target());
  51   ash::TouchUMA::GetInstance()->RecordTouchEvent(target, *event);
  52 }
  53
  54 void SystemGestureEventFilter::OnGestureEvent(ui::GestureEvent* event) {
  55   aura::Window* target = static_cast<aura::Window*>(event->target());
  56   ash::TouchUMA::GetInstance()->RecordGestureEvent(target, *event);
  57   long_press_affordance_->ProcessEvent(target, event);
  58
  59   if (overview_gesture_handler_ &&
  60       overview_gesture_handler_->ProcessGestureEvent(*event)) {
  61     event->StopPropagation();
  62     return;
  63   }
  64
  65   if (event->type() == ui::ET_GESTURE_WIN8_EDGE_SWIPE &&
  66       shelf_gesture_handler_->ProcessGestureEvent(*event)) {
  67     // Do not stop propagation, since the immersive fullscreen controller may
  68     // need to handle this event.
  69     return;
  70   }
  71 }
  72
  73 }  // namespace ash