ui/events/event_handler.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 "ui/events/event_handler.h"
   6
   7 #include "ui/events/event.h"
   8 #include "ui/events/event_dispatcher.h"
   9
  10 namespace ui {
  11
  12 EventHandler::EventHandler() {
  13 }
  14
  15 EventHandler::~EventHandler() {
  16   while (!dispatchers_.empty()) {
  17     EventDispatcher* dispatcher = dispatchers_.top();
  18     dispatchers_.pop();
  19     dispatcher->OnHandlerDestroyed(this);
  20   }
  21 }
  22
  23 void EventHandler::OnEvent(Event* event) {
  24   // TODO(tdanderson): Encapsulate static_casts in ui::Event for all
  25   //                   event types.
  26   if (event->IsKeyEvent())
  27     OnKeyEvent(static_cast<KeyEvent*>(event));
  28   else if (event->IsMouseEvent())
  29     OnMouseEvent(static_cast<MouseEvent*>(event));
  30   else if (event->IsScrollEvent())
  31     OnScrollEvent(static_cast<ScrollEvent*>(event));
  32   else if (event->IsTouchEvent())
  33     OnTouchEvent(static_cast<TouchEvent*>(event));
  34   else if (event->IsGestureEvent())
  35     OnGestureEvent(event->AsGestureEvent());
  36   else if (event->type() == ET_CANCEL_MODE)
  37     OnCancelMode(static_cast<CancelModeEvent*>(event));
  38 }
  39
  40 void EventHandler::OnKeyEvent(KeyEvent* event) {
  41 }
  42
  43 void EventHandler::OnMouseEvent(MouseEvent* event) {
  44 }
  45
  46 void EventHandler::OnScrollEvent(ScrollEvent* event) {
  47 }
  48
  49 void EventHandler::OnTouchEvent(TouchEvent* event) {
  50 }
  51
  52 void EventHandler::OnGestureEvent(GestureEvent* event) {
  53 }
  54
  55 void EventHandler::OnCancelMode(CancelModeEvent* event) {
  56 }
  57
  58 }  // namespace ui