Label position on Homebrew Pmw Megawidget

**Peter Otten** · Jul 18 '05, 08:39 AM

Re: Label position on Homebrew Pmw Megawidget

Greg wrote:
[color=blue]
> I'm trying to create a megawidget for file selection that contains a
> Label, EntryField, and Browse Button (that will open a tkFileDialog).
> The label positioning won't cooperate however, could anyone help with
> this?
>
> Here's what I want:
> labelpos='w':
> ---------------------- ------------
> Filename: |c:\directory\f ile | |Browse... |
> ---------------------- ------------[/color]

[...]
[color=blue]
> My code is below. I've tried different grid(row,column ) values for
> the widgets, but that didn't seem to help.
>
>
> Can anyone help with this? It's driving me nuts! I imagine I'm doing
> something wrong with the createlabel() method, or something else
> trivially simple...[/color]

I've no clue either. Enter brute force:

#!/bin/python
#Running standalone will demo the above ascii pic, plus some others:

import Pmw
import Tkinter
from Tkinter import *
import tkFileDialog

class FileSelect(Pmw. MegaWidget):
""" Megawidget containing Pmw.Entryfield and a Browse button
for file selection
"""

def __init__ (self, parent=None, **kw):
# Define the megawidget options
optiondefs = (
('labelmargin', 0, Pmw.INITOPT),
('labelpos', None, Pmw.INITOPT),
)
self.defineopti ons(kw, optiondefs)

# Initialise base class (after defining options)
Pmw.MegaWidget. __init__(self, parent)

# Create the components
interior = self.interior()

# Create a label
self.createlabe l(interior, childRows=2, childCols=1)

# Create the Entryfield component
self.entryfield = self.createcomp onent('filename ', # Name
(), # Aliases
None, # Group
Pmw.EntryField, # Class
(interior,), # Constructor
Args
)
self.entryfield .grid(row=yoff, column=xoff)

# Create the Browse Button
self.browsebutt on = self.createcomp onent('browsebu tton', # Name
(), # Aliases
None, # Group
Tkinter.Button, # Class
interior, # Constructor
Args
text="Browse... ",
command=self.ge tFileName
)
self.browsebutt on.grid(row=yof f, column=xoff+1)

# Check keywords and initialise options
self.initialise options()

#------------------------------------------------------------------
# Popup a file select dialog and fill in the entry field with the
# chose filename
#------------------------------------------------------------------

def getFileName (self):
dialog = tkFileDialog.Op en()
fname = dialog.show()
if fname != "":
self.entryfield .setvalue(fname )

xoff = 0
yoff = 0

def terminate():
import sys
sys.exit(0)

def testWidgets():
root = Tkinter.Tk()

# Create and pack a FileSelect widgets
widgets = []
Tkinter.Button( root, text="terminate app", command=termina te).pack()
Tkinter.Button( root, text="next try", command=root.qu it).pack()
widgets.append( FileSelect(labe lpos='n', label_text="nor th"))
widgets.append( FileSelect(labe lpos='e', label_text="eas t"))
widgets.append( FileSelect(labe lpos='s', label_text="sou th"))
widgets.append( FileSelect(labe lpos='w', label_text="wes t"))
widgets.append( FileSelect(labe lpos='ws', label_text="wes tsouth"))
widgets.append( FileSelect(labe lpos='wn', label_text="wes tnorth"))
widgets.append( FileSelect(labe lpos='sw', label_text="sou thwest"))
widgets.append( FileSelect(labe lpos='nw', label_text="nor thwest"))

map(lambda w: w.pack(pady=20) , widgets)
return root

if __name__ == "__main__":
for xoff in range(3):
for yoff in range(3):
root = testWidgets()
root.title("Tes ting xoff=%d, yoff=%d" % (xoff, yoff))
root.mainloop()
root.destroy()

(xoff=1, yoff=2) seems promising.

Peter

Label position on Homebrew Pmw Megawidget

Label position on Homebrew Pmw Megawidget

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