This function compares the touch coordinates with the rectangular areas defined in TCHTBL and returns the object code of the area. If no area was touched, the function returns -1.

The touch table entries have to be declared as shown here:

CONST tchtbl=(<objcode>, <touchfunc>, <x1>,<y1>,<x2>,<y2>, <objcode>, <touchfunc>, <x1>,<y1>,<x2>,<y2>, ... -1)

If the object code is -2, the acutal element is not queried, if -1, the function returns. Therefore, every touch table has to end with -1.

The function allows the use of up to 8 different touch functions. To install a touch function (touch functions must be of the type func!(x1%,y1%,x2%,y2%)), assign the function to an element of std_tch. std_tch[0] points to TOUCHED! per default.

Example:

CONST tchtbl=(1, 1, 0,0,159,19, 10, 0, 0,20,78,159, 11, 0, 20,159,159, -1) std_tch[1]=FUNC(BTNTOUCH!) DO SYS 2 CASE SELECT STD_TCHOBJ(tchtbl) CASE 1: end 0 CASE 10: PRINT "left half touched" CASE 11: PRINT "right half touched" ENDCASE LOOP WHILE TRUE