Thanks Bjornke, Victoras, and Craig. I've got something that works
now. This is the method I used. There is a preexisting rectangle
called "backRect" and a user field called "numUnits". This seems to
work pretty well so far.
Mark
ON makeLines
put field "numUnits" into vNumUnits -- how many lines (units)
high derived from user input field
lock screen
put round((the height of grc "backRect")/(vNumUnits)) into
vBackIncrement -- how much space between lines, must be rounded
because pixels are whole numbers
put "x,x,x,x" into vThePoints -- starting point for first line
put item 4 of the rect of graphic "backRect" into item 2 of
vThePoints -- bottom of rectangle = (top of first line)
put item 4 of the rect of graphic "backRect" into item 4 of
vThePoints -- bottom of rectangle = (bottom of first line)
put item 1 of the rect of graphic "backRect" into item 1 of
vThePoints -- left side of line matches left side of rect
put item 3 of the rect of graphic "backRect" into item 3 of
vThePoints -- right side of line matches right side of rect
REPEAT (vNumUnits-1) times -- so top of rectangle will represent
last line
subtract vBackIncrement from item 2 of vThePoints -- each
line draws itself higher, from bottom up
subtract vBackIncrement from item 4 of vThePoints -- " " "
set the style of the templategraphic to "line" -- defines
graphic type
set the points of the templategraphic to vThePoints --
defines graphic location
create graphic "myLine" -- creates line and places at correct
location
END repeat
set the height of grc "backRect" to (the bottom of grc
"backRect") - (item 4 of vThePoints)+vBackIncrement -- because spaces
between lines may need to be rounded, rectangle itself needs to be
tweaked
set the top of grc "backRect" to (item 4 of vThePoints) -
vBackIncrement -- adjusts the rectangle up so all increments are even
unlock screen
reset the templateGraphic
END makeLines
On Mar 1, 2009, at 3:44 AM, Björnke von Gierke wrote:
The easiest way would be to buy malte's new chart engine (available
on the rev site).
If you're more interested in the learning experience, i suggest
setting the points of a graphic. if you have an empty line in the
points of a graphic, the two points above and below it won't be
connected, so you can even make the grid and the actual graph from
the same graphic. It's very easy to scale this to several heights:
Just use a very large rect as orignal, then shrink to your desired
size.
On the other hand, if you set the markers, you'll get graph markers
for free, so to say. But then you can't use the same graphic for
everything at once.
On 28 Feb 2009, at 21:13, Mark Swindell wrote:
What would be the best way to draw a simple graph by script?
All I need is a rectangle with horizontal lines drawn across it at
the correct intervals (height/100) or whatever the number of lines
is to be. I've been looking in the docs but still not sure how to
implement this. I also played around with using a list field and
setting the line height, but this isn't as accurate as I'd like.
--
official ChatRev page:
http://bjoernke.com/runrev/chatrev.php
Chat with other RunRev developers:
go stack URL "http://bjoernke.com/stacks/chatrev/chatrev1.3b3.rev";
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