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From: Kevin Walzer on 10 Mar 2010 09:44
Is there a way to tell if a Tk command was invoked from a menu item or
from a button? I'm seeing inconsistent behavior in a widget/dialog
package I maintain; the dialog is drawn with different window geometry
depending on whether it was called from a menu or a toolbar button. I
can't quite figure out what the issue is, but as a short-term workaround
I'd like to be able to set different parameters on the dialog depending
on whether it was called from a menu or a button.

Advice is appreciated.

--
Kevin Walzer
Code by Kevin
http://www.codebykevin.com
From: Helmut Giese on 10 Mar 2010 10:30
Hi Kevin,
>Is there a way to tell if a Tk command was invoked from a menu item or
>from a button? I'm seeing inconsistent behavior in a widget/dialog
>package I maintain; the dialog is drawn with different window geometry
>depending on whether it was called from a menu or a toolbar button. I
>can't quite figure out what the issue is, but as a short-term workaround
>I'd like to be able to set different parameters on the dialog depending
>on whether it was called from a menu or a button.
>
>Advice is appreciated.
I don't know if that's possible, but a quick solution would be to add
a (boolean) parameter to the event handler 'byMenu' and change the
[bind] command to pass a 1 for the menu and a 0 for the button.

A bit hackish, I know.
HTH
Helmut Giese
From: Kevin Walzer on 10 Mar 2010 10:54
On 3/10/10 10:30 AM, Helmut Giese wrote:

>>
>> Advice is appreciated.
> I don't know if that's possible, but a quick solution would be to add
> a (boolean) parameter to the event handler 'byMenu' and change the
> [bind] command to pass a 1 for the menu and a 0 for the button.
>
> A bit hackish, I know.
> HTH
> Helmut Giese

Is 'byMenu' a standard Tk event handler? I'm not familiar with it.

--
Kevin Walzer
Code by Kevin
http://www.codebykevin.com
From: Helmut Giese on 10 Mar 2010 11:19
On Wed, 10 Mar 2010 10:54:11 -0500, Kevin Walzer <kw(a)codebykevin.com>
wrote:

>On 3/10/10 10:30 AM, Helmut Giese wrote:
>
>>>
>>> Advice is appreciated.
>> I don't know if that's possible, but a quick solution would be to add
>> a (boolean) parameter to the event handler 'byMenu' and change the
>> [bind] command to pass a 1 for the menu and a 0 for the button.
>>
>> A bit hackish, I know.
>> HTH
>> Helmut Giese
>
>Is 'byMenu' a standard Tk event handler? I'm not familiar with it.
Oops,
maybe I should have been more explicit. What I meant is
- You have an event handler
proc myAction {param1 param2} {...}
- and attach it to a menu (and a button) like
bind $myMnu [list myAction $val1 $val2]
bind $myBtn [list myAction $val1 $val2]

What I proposed was (actually rather trivial) to
- change the event handler to
proc myAction {param1 param2 byMenu} {
if {$byMenu} {
<was invoked via menu>
} else {
<was invoked via button>
}
}
- and of course change the bindings to
bind $myMnu [list myAction $val1 $val2 1]
bind $myBtn [list myAction $val1 $val2 0]

In short, it is not using a built-in feature to detect the kind of
invocation (which I don't know if it exists), but rather you yourself
provide the information via an additional parameter.
HTH
Helmut Giese
From: John Seal on 10 Mar 2010 13:58
"Kevin Walzer" <kw(a)codebykevin.com> wrote in message
news:f3b02$4b97c0a3$4275d90a$7353(a)FUSE.NET...
> On 3/10/10 10:30 AM, Helmut Giese wrote:

>> I don't know if that's possible, but a quick solution would be to add
>> a (boolean) parameter to the event handler 'byMenu' and change the
>> [bind] command to pass a 1 for the menu and a 0 for the button.

> Is 'byMenu' a standard Tk event handler? I'm not familiar with it.

Kevin:

I think he means to add a parameter named 'byMenu' to the event handler.

That's the kind of mis-parsing of sentences that I find myself doing all the
time!

Keep up the good work.


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