Draw with pencil tool from a script to produce wiggly line?

[GeoffRev]

I want to draw a line graph from a script.
I have an image area which I can write on using the mouse, but cannot move the pencil tool from a script and hence produce the graph line. I remember doing this in HyperCard.
Of course there may be another way of doing this ... suggestions welcomed

Thanks

[Klaus]

Hi Geoff,

try this:

Code: Select all

on mouseUp
  choose pencil tool
  drag from "10,10" to "100,10"
end mouseUp

And replace the coordinates with yours.
Tested and works


Best

Klaus

[GeoffRev]

Thanks Klaus. I did try drag from .. to ... but couldn't get it to work earlier. Now it's OK.

You don't happen to know how to clear an image do you?

[Klaus]

Hi Geoff,

yes I do


Best

Klaus

[Klaus]

Hi geoff,

erm... oops...

...
put empty into img "You image here"
...

[GeoffRev]

Ah, ha ... tried this and my background colour disappears!

and
set backgroundcolor of img "my image here" to "White"
doesn't do anything.

Hmmmm .... setting the 'second color' in the object inspector doesn't change anything either ... it's not obvious what I doing wrong ... or is it?

[Klaus]

Hi Geoff,

well your question was how to clear an image, and that's what my line does completely emptying the image

Sorry, I don't think you can clear certain parts of your image.
Maybe you can try an "undo" right after the last editing?
I'm not sure, but its worth a try:

Code: Select all

on mouseup
  undo
end mouseup

Best

Klaus

[GeoffRev]

solution found!

put empty into img "image name"
choose bucket tool
click at the loc of img "image name"

phew! Thanks for your help.

Geoff

[Klaus]

Ah yes, if you only need the backgroundcolor in your image...