Re: How to set ttk::radiobutton -variable to an object's instance? variable?

At Fri, 11 Jul 2025 09:55:25 -0000 (UTC) Mark Summerfield <m.n.summerfield@gmail.com> wrote:

 
Given this class:
 
oo::class create App {
    # ...
    variable ShowState
}
 
And this method:
 
oo::define App method make_controls {} {
    # ...
    ttk::radiobutton .controlsFrame.showFrame.asIsRadio \
        -text "Show as-is" -value asis -variable ShowState
    set ShowState asis
 
The variable given to the radio button and the instance variable
are _different_.
 
I tried these variations, all of which gave errors:
 
-variable [my ShowState]
-variable [my $ShowState]
-variable [self ShowState]
-variable [self $ShowState]
 
For now I'm using a global variable ::ShowState
but I'd really like it to be an instance variable -
if it can be done?
                    

I don't know anything about how Tcl OO system works, but with SNIT I can do
this:

package require snit
package require Tk

snit::widget foo {
    variable ShowState
   
    constructor {args} {
        # ...
        ttk::radiobutton $win.controlsFrame.showFrame.asIsRadio \
            -text "Show as-is" -value asis -variable [myvar ShowState]
        # ...
    }
}

 

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