53 lines
1.6 KiB
Plaintext
53 lines
1.6 KiB
Plaintext
From: fredrik at pythonware.com (Fredrik Lundh)
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Date: Tue, 20 Apr 1999 10:01:02 GMT
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Subject: Tkinter: some Labels not updating
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References: <7fhdqo$dnl$1@agate.berkeley.edu>
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Message-ID: <00b901be8b14$b45097e0$f29b12c2@pythonware.com>
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Content-Length: 1341
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X-UID: 400
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python at pinky.cchem.berkeley.edu wrote:
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> My Tkinter window has a Canvas with a bitmap image in one Frame,
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> pull down menus in another Frame, and a few Buttons and Labels. The
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> Labels are supposed to indicate the values of certain variables which
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> change when the user clicks on the canvas. The first Label changes,
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> but the others don't, they stay fixed at the values they had when
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> I created the Label.
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>
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> Is there a trick here or something I don't get?
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>
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> I first create the StringVar:
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>
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> self.X1v=StringVar()
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>
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> Then I initialize X1v:
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>
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> self.X1v.set("X1: not entered")
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>
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> Then I make a Label object
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>
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> self.l1=Label(tb, textvariable=self.X1v)
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> self.l1.pack(side=TOP)
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>
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> Then in the mouse callback (yes, it gets run, I have it print to stdout)
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>
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> self.X1v.set("X1: Got It")
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>
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> But no update of the text in the label happens. Updates _do_ happen
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> in another Label object that is in a Frame by itself. Do I need a
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> separate Frame for each Label? Do I have too many Label objects?
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as far as I can tell, your program should work. which means that
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there's probably something you forgot to tell us. try to make a
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small but complete program that illustrates the problem.
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(btw, if nothing else helps, you could skip the textvariables and
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use self.l1.config(text="X1: Got it") instead...)
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</F>
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