Hi, Thanks for the help.
I was trying to find a book "Python TK" something on last Friday.
but didn't find it :-)
I know those codes are in poor design, because I wrote those sample code
to show the idea about what I need. the real code is working with mysql.
however, I'm really new in python. (I start learning it on last Wednesday).
Thanks again for the help!
Ray
James Stroud wrote:
>
>
> Using grid_forget() is probably optimization overkill, but may be handy
> for slower computers where you can watch the widgets appear one by one
> (older than about 5 years--for example original mac ibook). Also, you
> should get a good book on Tkinter because your design here will pretty
> difficult to maintain and is not very flexible.
>
> But...if you want to know how it might be done with grid_forget using
> the code you already have (i.e. making widgets only if necessary):
>
>
> #START#
> from Tkinter import *
> from tkMessageBox import showerror
> def mygrid(text):
> ######## how to use grid_forget() to clean the grid??###########
> numrows = len(frame3.rows)
> try:
> count=int(text)
> except:
> showerror('Entry Error',
> '''Hey, "%s" don't make an int, Fool!''' % text,
> parent=frame3)
> return 'break'
> for i in range(count):
> if i < numrows:
> cols = frame3.rows[i]
> else:
> cols = [Entry(frame3, relief=RIDGE) for j in range(4)]
> frame3.rows.append(cols)
> for j in range(4):
> e = cols[j]
> e.grid(row=i, column=j, sticky=NSEW)
> e.delete(0,END)
> e.insert(END, '%d.%d' % (i, j))
> for i in range(i+1, numrows):
> for e in frame3.rows[i]:
> e.grid_forget()
>
>
> root=Tk()
>
> frame1=Frame(root, width=150, height=100)
> frame1.pack()
>
> text=Entry(frame1)
> text.pack(side=LEFT)
>
> button=Button(frame1, text='generate grid', command=(lambda:
> mygrid(text.get())))
>
> button.pack()
>
> frame2=Frame(root, width=150, height=100)
> frame2.pack()
>
> button2=Button(frame2, text='exit', command=root.quit)
> button2.pack()
>
> frame3=Frame(root, width=150, height=300)
> # adding an attribute here
> frame3.rows = []
> frame3.pack()
>
> root.mainloop()
> #END#
>
> Notice also the necessity for the "e.delete(0, END)" line to get the
> desired text in the entries.
>
> Also demonstrated is how to handle poor input.
>
> *Note*
> Remember to always call the user "Fool" when he does something stupid.
>
>
> James
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