onTouchBegan not working cocos2dx - c++

Question

try to play around with cocos2dx with cpp:
Here is the Header file:
#ifndef FirstScene_h
#define FirstScene_h
#include "cocos2d.h"
class FirstScene: public cocos2d::Scene
{
public:
static cocos2d::Scene* createScene();
virtual bool init();
void menuCloseCallback(cocos2d::Ref* pSender);
CREATE_FUNC(FirstScene);
bool onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event);
bool onTouchMoved(cocos2d::Touch *touch, cocos2d::Event * event);
bool onTouchEnd(cocos2d::Touch *touch, cocos2d::Event *event);
private:
cocos2d::Label *logLabel;
};
#endif /* FirstScene_h */
And here is the cpp file:
#include "FirstScene.h"
#include "SimpleAudioEngine.h"
USING_NS_CC;
Scene* FirstScene::createScene(){
return FirstScene::create();
}
bool FirstScene::init(){
if(!Scene::init()){
return false;
}
auto visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();
auto label = Label::createWithTTF("this is the first scene", "fonts/Marker Felt.ttf", 24);
label->setPosition(visibleSize.width/2,visibleSize.height/2);
this->addChild(label,1);
auto sprite = Sprite::create("HelloWorld.png");
sprite->setPosition(visibleSize.width/3,visibleSize.height/3);
logLabel = Label::createWithTTF("Log holder", "fonts/Marker Felt.ttf", 24);
logLabel->setPosition(visibleSize.width/2 + 10.0f, visibleSize.height/2 + 10.0f);
this->addChild(logLabel,3);
this->addChild(sprite,0);
auto listener = EventListenerTouchOneByOne::create();
listener->onTouchBegan = CC_CALLBACK_2(FirstScene::onTouchBegan, this);
listener->onTouchMoved = CC_CALLBACK_2(FirstScene::onTouchMoved, this);
listener->onTouchEnded = CC_CALLBACK_2(FirstScene::onTouchEnd, this);
return true;
}
bool FirstScene::onTouchBegan(cocos2d::Touch *touch, cocos2d::Event *event) {
CCLOG("touch at x=%f, y=%f", touch->getLocation().x, touch->getLocation().y);
std::string s = "";
s += "touch at x=";
s += touch->getLocation().x;
s += "y=";
s += touch->getLocation().y;
logLabel->setString(s);
return true;
}
bool FirstScene::onTouchMoved(cocos2d::Touch *touch, cocos2d::Event *event) {
std::string s = "";
s += "touch moved at x=";
s += touch->getDelta().x;
s += " y=";
s += touch->getDelta().y;
CCLOG("touch moved at x=%f, y=%f", touch->getDelta().x, touch->getDelta().y);
logLabel->setString(s);
return true;
}
bool FirstScene::onTouchEnd(cocos2d::Touch *touch, cocos2d::Event *event) {
std::string s="";
s += "touch ended at x=";
s += touch->getLocation().x;
s += " y=";
s += touch->getLocation().y;
CCLOG("touch ended at x=%f, y=%f", touch->getLocation().x, touch->getLocation().y);
logLabel->setString(s);
return true;
}
The things I want is when I touch and move on the screen, the log will be showed and the logLabel will show the message, but it seems there is no message saw either in the log window nor the logLabel changed.
What did I missing?
Note
I load this scene by one previous scene by following code if it matters:
void HelloWorld::menuCloseCallback(Ref* pSender)
{
auto firstScene = FirstScene::createScene();
Director::getInstance()->replaceScene(firstScene);
}
Really a newbie for cocos2dx and cpp, thanks in advance.

Answer 1

You need to add/register you event listener to event dispatcher :
Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);
If you want to add an event listener for a specified event with the priority of scene graph :
addEventListenerWithSceneGraphPriority(EventListener* listener, Node* node)
else want add an event listener for a specified event with the fixed priority.
addEventListenerWithFixedPriority(EventListener* listener, Node* node)