Tkinter and PMW - dynamic labels

[uri bushey]

Is there an easy way to have a label read from a variable, and update
itself when the variable is changed?

I have a dialogue that asks for a name, and a label that displays the
name that is placed in a variable.

I have the label, and I have a Python megawidget (pmw) PromptDialog that
gets a value from the user. I would like that value to update the label
- is there a way to do that without creating and destroying the label in
a function that is called every time the PromptDialog is called?

Thanks!

 

[Christopher T King]

Is there an easy way to have a label read from a variable, and update
itself when the variable is changed?

You can do this by using a StringVar. Try this in an interactive session:

IntVar and DoubleVar provide similar functionality for ints and floats,
respectively. Other widgets provide a similar 'variable' option to allow
them to directly interact with variables.

Unfortunately the Var classes don't play well with normal Python
operations; you must always access them through their .set() and .get()
methods.

I have the label, and I have a Python megawidget (pmw) PromptDialog that
gets a value from the user. I would like that value to update the label
- is there a way to do that without creating and destroying the label in
a function that is called every time the PromptDialog is called?

Yes, you can simply change the label's text attribute:

mylabel['text'] = newvalue

Hope this helps.

 

[uri bushey]

You can do this by using a StringVar. Try this in an interactive session:

Yes, you can simply change the label's text attribute:

mylabel['text'] = newvalue

Hope this helps.

Yes, thank you so much. This turned out to be the most elegant solution
I think.