Path: utzoo!utgpu!utfyzx!oscvax!jan
From: jan@oscvax.UUCP (Jan Sven Trabandt)
Newsgroups: comp.sys.amiga
Subject: help: proportional gadgets
Message-ID: <585@oscvax.UUCP>
Date: Sat, 20-Feb-88 19:33:58 EST
Reply-To: jan@oscvax.UUCP (Jan Sven Trabandt)
Distribution: na
Organization: Ontario Science Centre, Toronto
Lines: 38


Howdy howdy. (I forgot this one in my last posting)

According to the Intuition manual, in their example for a proportional
gadget(vertical) they say:
	suppose a window shows 5 lines of a (max) 15 line file
	then set the VertBody to 0xFFFF / 3 = 0x5555 so that the
	auto-knob fills one-third of the container.
	This it does.
	However, clicking on the container, which is supposed to advance
	the VertPot by VertBody (ie 0 => 1/3 => 2/3 in real terms),
	causes the VertPot to effectively go 0 => 1/2 => 1 as if the
	5 lines in the window showed part of the 4/3 of the file
Did things change or am I just enterpreting things wrong.

The upshot of this is that I have a similar situation:
my window shows (say) 10 lines out of 100 possible.
I set my VertBody to 1/10 of 0xFFFF but I get a similar thing happening
as above. i.e. The VertPot goes all the way to 1 (0xFFFF) and thus tells
me to display the 11th 1/10 of my lines [lines 101-110].
What should I be setting my VertBody to, or how can I compensate for
this?
(I also want to be able to take the VertPot value and figure out which
line is supposed to be at the top of the window, and I want clicking
on the container (not the knob) to advance the VertPot 1/10 of 0xFFFF
properly).
This is happening in a SMART_REFRESH window.

Thanks in advance,
Jan Sven.
--------------------------------------------------------
"Violence is the last resort of the incompetent"
	- Hari Seldon, 'The Foundation Trilogy'  (Isaac Asimov)

Mind like parachute  -  function only when open!

Jan  (Jan, from Amsterdam) no-hyphen Sven  Trabandt
...!{allegro,ihnp4,decvax,pyramid}!utzoo!oscvax!jan