Re: How to retrieve a text string information

It's a great idea but I forsee three possible obstacles at
implementing it.

1. Users can place any number of such text strings at will. May I tag
all these text strings the same way (using the same tag) ?

2. By rescaling I mean to multiply the single object y-coordinate by
the inverse of the new aspect ratio. The default aspect ratio is 1:1..
The only other choice is 16:9.
Is this possible by retrieving the text strings through their common
tag ?
I do not use the Tk command "rescale" as it does not result in a canvas
whose aspect ratio is 16:9.

3. Should I need to rescale the text strings font as well (possibly
just choosing a smaller font) is this possible by retrieving the text
strings though the tag ?

Thank you very much for your help.
Maura


Uwe Klein wrote:
Hi,

what about "tagging" these text elements during
creation:

$canv create text .... -tags {special_text tagged_for_rescaling ..}
or later
$canv addtag ..

and then do when it is time to rescale:

foreach item [$canv find withtag {tagged_for_rescaling} ] {
# do the rescaling
}

to keep the items on top

$canv raise tagged_for_rescaling

tagging can be used to advantage,
"find withtag" and imho all other ops that accept tags
allow operating on items selected by logigal ops on tags
i.e tagA||tagB works.

look into the canvas manpage: "ITEM IDS AND TAGS"

uwe

.

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