cocos2d-x-3.3rc0事件处理

1. 头文件

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

USING_NS_CC;

class HelloWorld : public cocos2d::Layer
{
public:
    // there's no 'id' in cpp,so we recommend returning the class instance pointer
    static cocos2d::Scene* createScene();

    // Here's a difference. Method 'init' in cocos2d-x returns bool,instead of returning 'id' in cocos2d-iphone
    virtual bool init();
    
    // a selector callback
    void menuCloseCallback(cocos2d::Ref* pSender);
    
    // implement the "static create()" method manually
    CREATE_FUNC(HelloWorld);

    // Event Listener
    virtual void onEnter() override;

	void onTouchesBegan(const std::vector<Touch*>& touches,Event  *event);
    void onTouchesMoved(const std::vector<Touch*>& touches,Event  *event);
    void onTouchesEnded(const std::vector<Touch*>& touches,Event  *event);    

    void onKeyPressed(EventKeyboard::KeyCode keyCode,Event* event);
    void onKeyReleased(EventKeyboard::KeyCode keyCode,Event* event);

    void onMouseDown(Event* event);
    void onMouseUp(Event* event);
    void onMouseMove(Event* event);
    void onMouseScroll(Event* event);

    Vec2 _beginPos;

    void playTest(float dt);
};

#endif // __HELLOWORLD_SCENE_H__

2. 代码

#include "HelloWorldScene.h"
#include "MediaManager.h"

//USING_NS_CC;

void HelloWorld::onEnter()
{
    Layer::onEnter();
    
    auto s = Director::getInstance()->getWinSize();

	// Myboard can receive mouse Left and middle and touchscreen    
    auto touchListener = EventListenerTouchAllAtOnce::create();
    touchListener->onTouchesBegan = CC_CALLBACK_2(HelloWorld::onTouchesBegan,this);
    touchListener->onTouchesMoved = CC_CALLBACK_2(HelloWorld::onTouchesMoved,this);
	touchListener->onTouchesEnded = CC_CALLBACK_2(HelloWorld::onTouchesEnded,this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(touchListener,this);

	//  Process Mouse Right (KEYCODE_BACK) only onKeyReleased
	auto keyboardListener = EventListenerKeyboard::create();
	keyboardListener->onKeyPressed = CC_CALLBACK_2(HelloWorld::onKeyPressed,this);
	keyboardListener->onKeyReleased = CC_CALLBACK_2(HelloWorld::onKeyReleased,this);
	_eventDispatcher->addEventListenerWithSceneGraphPriority(keyboardListener,this);

	// Myboard can't receive any mouse events
    auto mouseListener = EventListenerMouse::create();
    mouseListener->onMouseDown   = CC_CALLBACK_1(HelloWorld::onMouseDown,this);
    mouseListener->onMouseMove   = CC_CALLBACK_1(HelloWorld::onMouseMove,this);
    mouseListener->onMouseUp 	 = CC_CALLBACK_1(HelloWorld::onMouseUp,this);
	mouseListener->onMouseScroll = CC_CALLBACK_1(HelloWorld::onMouseScroll,this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(mouseListener,this);
	
}

void HelloWorld::onTouchesBegan(const std::vector<Touch*>& touches,Event  *event)
{
    auto touch = static_cast<Touch*>(touches[0]);

    _beginPos = touch->getLocation(); 
	log("***EVENT:%s: x=%f,y=%f\n",__FUNCTION__,_beginPos.x,_beginPos.y);
}

void HelloWorld::onTouchesMoved(const std::vector<Touch*>& touches,Event  *event)
{
    auto touch = static_cast<Touch*>(touches[0]);

    auto touchLocation = touch->getLocation();    

	log("***EVENT:%s: x=%f,touchLocation.x,touchLocation.y);
}

void HelloWorld::onTouchesEnded(const std::vector<Touch*>& touches,touchLocation.y);
}

void HelloWorld::onKeyPressed(EventKeyboard::KeyCode keyCode,Event* event)
{
    CC_UNUSED_PARAM(event);
    log("***EVENT:%s: keyCode=%d\n",keyCode);
}

void HelloWorld::onKeyReleased(EventKeyboard::KeyCode keyCode,keyCode);
	if(EventKeyboard::KeyCode::KEY_BACK == keyCode){
		Director::getInstance()->end();
	}
}

template <typename T> std::string tostr(const T& t) { std::ostringstream os; os<<t; return os.str(); }

void HelloWorld::onMouseDown(Event *event)
{
    EventMouse* e = (EventMouse*)event;
    std::string str = "Mouse Down detected,Key: ";
    str += tostr(e->getMouseButton());
    //_labelAction->setString(str.c_str());
    log("***EVENT:%s:%s\n",str.c_str());
}

void HelloWorld::onMouseUp(Event *event)
{
    EventMouse* e = (EventMouse*)event;
    std::string str = "Mouse Up detected,Key: ";
    str += tostr(e->getMouseButton());
    log("***EVENT:%s:%s\n",str.c_str());
}

void HelloWorld::onMouseMove(Event *event)
{
    EventMouse* e = (EventMouse*)event;
    std::string str = "MousePosition X:";
    str = str + tostr(e->getCursorX()) + " Y:" + tostr(e->getCursorY());
    log("***EVENT:%s:%s\n",str.c_str());
}

void HelloWorld::onMouseScroll(Event *event)
{
    EventMouse* e = (EventMouse*)event;
    //auto e = static_cast<EventMouse*>(event);

    std::string str = "Mouse Scroll detected,X: ";
    str = str + tostr(e->getScrollX()) + " Y: " + tostr(e->getScrollY());
    log("***EVENT:%s:%s\n",str.c_str());
}

Scene* HelloWorld::createScene()
{
    // 'scene' is an autorelease object
    auto scene = Scene::create();
    
    // 'layer' is an autorelease object
    auto layer = HelloWorld::create();

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }
    
    Size visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();

	log("TEST: x=%f,y=%f,w=%f,h=%f\n",origin.x,origin.y,visibleSize.width,visibleSize.height);

    /////////////////////////////
    // 2. add a menu item with "X" image,which is clicked to quit the program
    //    you may modify it.

    // add a "close" icon to exit the progress. it's an autorelease object
    auto closeItem = MenuItemImage::create(
                                           "CloseNormal.png","CloseSelected.png",CC_CALLBACK_1(HelloWorld::menuCloseCallback,this));
    
	closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2,origin.y + closeItem->getContentSize().height/2));

    // create menu,it's an autorelease object
    auto menu = Menu::create(closeItem,nullptr);//NULL);
    menu->setPosition(Vec2::ZERO);
    this->addChild(menu,1);

    /////////////////////////////
    // 3. add your codes below...

    // add a label shows "Hello World"
    // create and initialize a label
    
    auto label = Label::createWithTTF("Hello World","fonts/Marker Felt.ttf",24);
    
    // position the label on the center of the screen
    label->setPosition(Vec2(origin.x + visibleSize.width/2,origin.y + visibleSize.height - label->getContentSize().height));

    // add the label as a child to this layer
    this->addChild(label,1);

    // add "HelloWorld" splash screen"
    auto sprite = Sprite::create("HelloWorld.png");

    // position the sprite on the center of the screen
    sprite->setPosition(Vec2(visibleSize.width/2 + origin.x,visibleSize.height/2 + origin.y));

    // add the sprite as a child to this layer
    this->addChild(sprite,0);

	//MediaManager::getInstance()->play("/mnt/sdcard/video/cg720p.mp4");

	// every 10s,call HelloWorld::playTest
    //this->schedule(CC_SCHEDULE_SELECTOR(HelloWorld::playTest),10);		
	
    return true;
}

void HelloWorld::playTest(float dt)
{
	//MediaManager::getInstance()->seekTo(20*1000);
}


void HelloWorld::menuCloseCallback(Ref* pSender)
{
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)
	MessageBox("You pressed the close button. Windows Store Apps do not implement a close button.","Alert");
    return;
#endif

    Director::getInstance()->end();

#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
    exit(0);
#endif
}