How to detect double click with cocos2d-x - cocos2d-x

Question

How do I port this cocos2d-iphone code to cocos2d-x?
(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
NSSet *allTouches = [event allTouches];
switch ([allTouches count]) {
case 1:
{
UITouch *touch = [[allTouches allObjects] objectAtIndex:0];
switch([touch tapCount])
{
case 1:
// 单击!
break;
case 2:
//Double tap.
// 双击!
break;
}
break;
}
}

Answer 1

There is no function to implement this,we can implement this by test the tick between two clicks.In general,the time interval of double click is between 250ms~300ms.Use this to get the system's current number of milliseconds
long millisecondNow()
{
struct cc_timeval now;
CCTime::gettimeofdayCocos2d(&now, NULL);
return (now.tv_sec * 1000 + now.tv_sec / 1000);
}

Answer 2

In MyScene.h, declare:
int tapCount;
Touch lastTouch;
void singleTap(float deltaTime);
Then in MyScene.cpp:
bool MyScene::onTouchBegan(Touch* touch, Event* event)
{
++tapCount;
lastTouch = *touch;
if (tapCount == 1) {
this->schedule(schedule_selector(MyScene::singleTap), 0.25, 1, 0);
}
else {
this->unschedule(schedule_selector(MyScene::singleTap));
tapCount = 0;
printf("\n\ndouble tap\n\n");
}
return true;
}
void MyScene::singleTap(float deltaTime)
{
this->unschedule(schedule_selector(LevelScene::singleTap));
tapCount = 0;
printf("\n\nsingle tap\n\n");
}
You can then access lastTouch in singleTap or your doubleTap method. If you don't need lastTouch to be a Touch object, you can use a Vec2 and set the coordinates. Note that the timer interval (0.25) is more accurate on the device. There is a lag in the simulator since the interval isn't actually wall-clock time.

Answer 3

You can do like this
void HelloWorld::callback1()
{
_tapCount = 0;
}
void HelloWorld::menuCloseCallback(Ref* pSender)
{
_tapCount = _tapCount + 1;
if (_tapCount == 1)
{
DelayTime* delayAction = DelayTime::create(0.3);
CallFunc*resetAction = CallFunc::create(CC_CALLBACK_0(HelloWorld::callback1, this));
Sequence *seq = Sequence::create(delayAction, resetAction, NULL);
this->runAction(seq);
}
else{
log("double tap");
};
}