Cocos2d-x事件监听机制

  1 #include "TouchScene.h"
  2 #include <string>
  3 
  4 USING_NS_CC;
  5 
  6 Scene* TouchScene::createScene(){
  7     auto scene = Scene::create();
  8     auto layer = TouchScene::create();
  9     scene->addChild(layer);
 10     return scene;
 11 }
 12 
 13 bool TouchScene::init(){
 14     if (!Layer::init()){
 15         return false;
 16     }
 17     auto visibleSize = Director::getInstance()->getVisibleSize();
 18 
 19     auto sprite1 = Sprite::create("sprite.png");
 20     sprite1->setPosition(Point(visibleSize.width / 2, visibleSize.height / 2));
 21 
 22     auto sprite2 = Sprite::create("sprite2.png");
 23     sprite2->setPosition(Point(visibleSize.width / 2 - 100, visibleSize.height / 2));
 24 
 25     auto sprite3 = Sprite::create("sprite3.png");
 26     sprite3->setPosition(Point(visibleSize.width / 2 + 100, visibleSize.height / 2));
 27 
 28     this->addChild(sprite1);
 29     this->addChild(sprite2);
 30     this->addChild(sprite3);
 31 
 32     /*触摸事件监听*/
 33     auto listener1 = EventListenerTouchOneByOne::create();
 34     listener1->setSwallowTouches(true);
 35     listener1->onTouchBegan = [](Touch *touch,Event *event){
 36         auto target = static_cast<Sprite*>(event->getCurrentTarget());
 37         Point locationInNode = target->convertToNodeSpace(touch->getLocation());
 38         Size s = target->getContentSize();
 39         Rect rect = Rect(0, 0, s.width, s.height);
 40         if (rect.containsPoint(locationInNode)){
 41             log("%d,%d", locationInNode.x, locationInNode.y);
 42             return true;
 43         }
 44         return false;
 45     };
 46     listener1->onTouchMoved = [](Touch* touch, Event* event){
 47         log("MOVE");
 48     };
 49     listener1->onTouchEnded = [](Touch* touch, Event* event){
 50         log("END");
 51     };
 52 
 53     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener1, sprite1);
 54     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener1->clone(), sprite2);
 55     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener1->clone(), sprite3);
 56 
 57 
 58     /*键盘事件监听*/
 59     auto listener2 = EventListenerKeyboard::create();
 60     listener2->onKeyPressed = CC_CALLBACK_2(TouchScene::onKeyPressed, this);
 61     listener2->onKeyReleased = CC_CALLBACK_2(TouchScene::onKeyReleased, this);
 62 
 63     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener2, this);
 64 
 65     /*鼠标事件监听*/
 66     auto listener3 = EventListenerMouse::create();
 67     listener3->onMouseDown = [=](Event *event){
 68         auto e = static_cast<EventMouse *>(event);
 69         log("%d", e->getMouseButton());
 70     };
 71     listener3->onMouseUp = [=](Event *event){
 72         auto e = static_cast<EventMouse *>(event);
 73         log("%d", e->getMouseButton());
 74     };
 75     listener3->onMouseMove = [=](Event *event){
 76         auto e = static_cast<EventMouse *>(event);
 77         log("%d", e->getMouseButton());
 78     };
 79     listener3->onMouseScroll = [=](Event *event){
 80         auto e = static_cast<EventMouse *>(event);
 81         log("%d", e->getMouseButton());
 82     };
 83 
 84     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener3, this);
 85 
 86     /*用户自定义事件的分发*/
 87     auto listener4 = EventListenerCustom::create("custom_event1", [=](EventCustom *event){
 88         std::string str("Custom event 1 received,");
 89         char *buf = static_cast<char*>(event->getUserData());
 90         str += buf;
 91         str += " times";
 92         log(str.c_str());
 93     });
 94     _eventDispatcher->addEventListenerWithFixedPriority(listener4, 1);
 95 
 96     char *buf = "event 1";
 97     EventCustom event("custom_event1");
 98     event.setUserData(buf);
 99     _eventDispatcher->dispatchEvent(&event);
100 
101     /*加速计事件*/
102     Device::setAccelerometerEnabled(true);
103     auto listener5 = EventListenerAcceleration::create([=](Acceleration *acc,Event *event){
104         log("Acceleration event");
105     });
106     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener5, this);
107 
108     return true;
109 }
110 
111 void TouchScene::onKeyPressed(EventKeyboard::KeyCode keyCode, Event* event){
112     log("%d",keyCode);
113 }
114 
115 void TouchScene::onKeyReleased(EventKeyboard::KeyCode keyCode, Event *event){
116     log("%d", keyCode);
117 }