Dynamically changing button text in python

[marijuanated@gmail.com]

Hi all,

I am wondering if i could change a button text dynamically in its
handler.

for example,can we do something like this:

curButton.bind( "<Button-1>",self.StopSe rver)

def StopServer(self ,event):
curButton["text"] = "Start Server"

Thanks,
Sundar

[Paul Rubin]

Re: Dynamically changing button text in python

marijuanated@gm ail.com writes:[color=blue]
> for example,can we do something like this:
>
> curButton.bind( "<Button-1>",self.StopSe rver)
>
> def StopServer(self ,event):
> curButton["text"] = "Start Server"[/color]

Yes.

[marijuanated@gmail.com]

Re: Dynamically changing button text in python

The problem is once i set the textvariable property of the button,i
cannot change the text.For example,

curButton = Button(root,tex t="Stop Server",textvar iable="this")

curButton.bind( "<Button-1>",self.StopSe rver)

def StopServer(self ,event):
curButton["text"] = "Start Server" #this does not work

[Paul Rubin]

Re: Dynamically changing button text in python

marijuanated@gm ail.com writes:[color=blue]
> The problem is once i set the textvariable property of the button,i
> cannot change the text.For example,
>
> curButton = Button(root,tex t="Stop Server",textvar iable="this")[/color]

1. I don't think you can use text and textvariable at the same time.
2. I don't think you're using textvariable the right way.

Try something like:

tv = StringVar()
curButton = Button(root, textvariable=tv )
curButton.bind( "<Button-1>",self.StopSe rver)
def StopServer(self ,event):
tv.set("Start Server")

--Paul

[Fredrik Lundh]

Re: Dynamically changing button text in python

marijuanated@gm ail.com wrote:
[color=blue]
> The problem is once i set the textvariable property of the button,i
> cannot change the text.For example,
>
> curButton = Button(root,tex t="Stop Server",textvar iable="this")[/color]

what made you think that setting textvariable to "this" would be a good
idea?

the textvariable option is used to specify a Tkinter variable that's used
to control the button text; e.g.

curVar = Tkinter.StringV ar()
curButton = Button(root, textvariable=cu rVar)

curVar.set("new text")

also see

http://effbot.org/tkinterbook/button.htm

http://effbot.org/tkinterbook/variable.htm

</F>

[marijuanated@gmail.com]

Re: Dynamically changing button text in python

Thank you very much.I had actually misinterpreted the "textvariab le"
property for some kind of "storage for each Button". I am actually
developing an app where multiple buttons have a single event handler.So
i thought the "textvariab le" property might be used to store some info
about each of the Button so that the handler can differentiate between
the callers by examining the property.Now i achieved similar
functionality with callbacks because button command handlers dont
receive any additional arguments.