Don't know how to work with touch screen...

hi.

i using arduino mega 2560 utft screen(touch screen included) - http://www.ebay.com/itm/3-2-tft-lcd-shield-touch-panel-tf-reader-for-arduino-/270972145966?pt=lh_defaultdomain_0&hash=item3f1732d12e

also i'm using library init utft screen , touch screen : http://www.uctronics.com/download/arduino_shileds/3inch2_revb.zip

the question : how can if rectangle touched?

code: [select]


#include <utft.h>
#include <itdb02_touch.h>
#include <sd.h>

// declare fonts using
extern uint8_t smallfont[];
extern uint8_t bigfont[];

utft screen(itdb32s,a1,a2,a0,a3);
itdb02_touch  tscreen(13,10,11,12,9);

boolean welcome = true;

void setup() {
  screen.initlcd(portrait);
  screen.clrscr();
  screen.setfont(bigfont);
 
  tscreen.inittouch();
  tscreen.setprecision(prec_low);
}

void loop() {
   if (welcome) {
   screen.setcolor(255,0,0);
   screen.fillrect( 20,20,60,60); //how can if rect touched?
   }
}


i have not programmed touch screens, can you. (i have programmed lot of small games pcs)

everytime when wanted object clicked , mouse got above comparing actual position of mouse x , y. think applies touchscreen. try compare position of touched finger position of rectangle (x , y ofc)

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