tutorial for text widget...

Steve Allen

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Jun 3, 2004, 10:20:04 PM6/3/04

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I'm relearning tcl, which is going fine. But I am also trying to learn
TK. I having a hard time with the text widget.

I can load it with text, search it, add tags for colors, etc, all sorts
of goodies but I just can't seem to find the magic cookies for:

1. moving the cursor to a index - i.e. making that index the current
(seems like I should say something like .textarea index set current 1.0)

2. I can find my current cursor, but how do I get the selection? I.E. a
start and end index from a dragged selection..

Also, I've found documentation on the web, and a few small tutorials.
But does any have anything they recommend (web page, book, etc)...

Many thanks....

Steve

Bruce Hartweg

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Jun 3, 2004, 10:50:17 PM6/3/04

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Steve Allen wrote:
> I'm relearning tcl, which is going fine. But I am also trying to learn
> TK. I having a hard time with the text widget.
>
> I can load it with text, search it, add tags for colors, etc, all sorts
> of goodies but I just can't seem to find the magic cookies for:
>
> 1. moving the cursor to a index - i.e. making that index the current
> (seems like I should say something like .textarea index set current 1.0)
>

there is a special mark named insert that is used that monitors/controls
where the insertion cursor is

.txtarea mark set insert 1.0

> 2. I can find my current cursor, but how do I get the selection? I.E. a
> start and end index from a dragged selection..
>

there is a special tag called sel that is the current selection

.textarea tag ranges sel

> Also, I've found documentation on the web, and a few small tutorials.
> But does any have anything they recommend (web page, book, etc)...
>

Check out
http://wiki.tcl.tk
it has many good examples/discussions/links/etc on tcl
For hard copy books I would recommend http://wiki.tcl.tk/8449
but there are others - see http://wiki.tcl.tk/57
or http://wiki.tcl.tk/references/3334

Bruce

Bryan Oakley

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Jun 3, 2004, 10:53:05 PM6/3/04

to

Steve Allen wrote:
> I'm relearning tcl, which is going fine. But I am also trying to learn
> TK. I having a hard time with the text widget.
>
> I can load it with text, search it, add tags for colors, etc, all sorts
> of goodies but I just can't seem to find the magic cookies for:
>
> 1. moving the cursor to a index - i.e. making that index the current
> (seems like I should say something like .textarea index set current 1.0)

.textarea mark set insert 1.0

>
> 2. I can find my current cursor, but how do I get the selection? I.E. a
> start and end index from a dragged selection..
>

set start [.textarea index sel.first]
set end [.textarea index sel.last]
# or...
set range [.textarea tag ranges sel]

Look again at the text widget man page and you'll see mention of the
special marks "insert" and "sel".

Arjen Markus

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Jun 4, 2004, 3:18:32 AM6/4/04

to

You may have a look at my article from the EuroTcl conference 2003.
It describes a number of uses of the text widget and the code fragments
should give you an idea about how things are done.

Follow the links at: <http://wiki.tcl.tk/6273>

Regards,

Arjen