Touch events and touch priorities in cocos2dx

1. Only cclayer and Its Derived classes have the touch function.

2. Enable touch

Settouchenable (true );

3. Set touch mode, single point, multi point (only supported by IOs)

Settouchmode (kcctouchesonebyone); // single point of touch

4. Four touch event functions to be overloaded

Bool cctouchbegan (cctouch * ptouch, ccevent * pevent); // returns false to indicate that the touch event will not be passed down.
Void cctouchmoved (cctouch * ptouch, ccevent * pevent); // move the event
Void cctouchended (cctouch * ptouch, ccevent * pevent); // end the event
Void cctouchcancelled (cctouch * ptouch, ccevent * pevent); // terminate the event

5. Obtain the coordinate point of the touch.

Ptouch-> getlocation ();

6. Get the moving relative displacement Delta

Ptouch-> getdelta ();

7. Determine whether the genie is being clicked, boundingbox (scaled size), and contentsize (actual size)

SPR-> boundingbox (). containspoint (ptouch-> getlocation () = true?

8. Set the touch priority and message swallowed-up

/* The Director obtains the touch event distributor */
Cctouchdispatcher * pdispatcher = ccdirector: shareddirector ()-> gettouchdispatcher ();
/*-1 indicates the priority of the message. A smaller value indicates a higher priority. False indicates that the message is not swallowed up. Setting true indicates that the message is swallowed up at the current layer and will not be passed down */
Pdispatcher-> addtargeteddelegate (this,-1, false );

Function prototype:

Void cctouchdispatcher: addtargeteddelegate (cctouchdelegate * pdelegate, int npriority, bool bswallowstouches );

 

Touch events and touch priorities in cocos2dx