Getting buttons to work

I am in the process of creating a nifty GUI, and it (of course) uses buttons. I created a function which draws buttons:

function button(cap, xpos, ypos, sizex, sizey)
  term.setTextColor(colors.white)
  term.setBackgroundColor(colors.blue)
  caplen = string.len(cap)
  term.setCursorPos(xpos, ypos)
  for ydraw = 1, sizey do
  for xdraw = 1, sizex do
  term.write(" ")
  end
  term.setCursorPos(xpos, ypos + ydraw)
  end
  term.setCursorPos((sizex/2-caplen/2)+xpos, sizey/2+ypos)
  term.write(cap)
end

Now I have absolutely no idea how to get these buttons to do anything and I need help. -Lenny

Buttons rely on os.pullEvent() to function.

while true do
  local event,mouseButton,clickX,clickY = os.pullEvent("mouse_click")
  if clickX >= buttonStartX and clickX <= buttonEndX
  and clickY >= buttonStartY and clickY <= buttonEndY then
    --button function
  end
end

http://computercraft.info/wiki/Os.pullEvent

Also I would like to point out a little function that will help you with your drawing and it is string.rep

for ydraw = 1, sizey do
  term.write(string.rep(' ', sizex))
  term.setCursorPos(xpos, ypos + ydraw)
end

CometWolf, on 20 January 2014 - 12:18 AM said:

Buttons rely on os.pullEvent() to function.

while true do
  local event,mouseButton,clickX,clickY = os.pullEvent("mouse_click")
  if clickX >= buttonStartX and clickX <= buttonEndX
  and clickY >= buttonStartY and clickY <= buttonEndY then
	--button function
  end
end

http://computercraft...ki/Os.pullEvent

Here is more "in-depth" tutorial:
http://www.computercraft.info/forums2/index.php?/topic/11046-clickable-buttons-in-cc/
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