hold button to change modes instead of a tap

[tomcat]

Hello, for instence in the opensource code to change modes you tap the button, and wait for the 10ms button de-bounce, how would you change that so you have  to hold down the button to change modes?

I know in the code it says this 10ms, i have changed that to 300ms or 3 sec and compiled it and it is still just a tap. If you have any sujestions your help would be much appreciated.

Wait10ms
   clrf   TEMP2
   movlw   0x0D
   movwf   TEMP1      ;rough 10ms timer for button debounce.