[Tutor] Percent done bar

[Alfred Milgrom]

At 11:16 AM 18/11/02 +0000, alan.gauld@bt.com wrote:
> > >is it possable to have a "percent-done" metre using
> > Tkinter??
>
>Try using a scroll bar widget.
>
>Alan G.

Just wanted to say I really enjoy reading this list - there's always 
something interesting coming up, so I thought I would contribute something 
back.

I think a neater effect for a percent bar is obtained by using a line 
object on a small canvas, as in the following:
(Alan: you'll notice that the code for the app, GUI, etc, is lifted 
directly from your tutorial)

from Tkinter import *

class ClearApp:
    def __init__(self, parent=0):
       self.mainWindow = Frame(parent)
       self.percentbar = Canvas(self.mainWindow)
       self.percentbar.config(height=10, width=100, bg='black')
       self.percentbar.create_line(0, 6, 0, 6, fill='red', width = 3, 
tag='bar')
       self.percentbar.pack()


       fOuter = Frame(self.mainWindow, border=1, relief="sunken")
       fButtons = Frame(fOuter, border=1, relief="raised")
       bDraw = Button(fButtons, text="Draw Bar",
                       width=8, height=1, command=self.drawBar)
       bQuit = Button(fButtons, text="Quit",
                       width=8, height=1, command=self.mainWindow.quit)
       bDraw.pack(side="left", padx=15, pady=1)
       bQuit.pack(side="right", padx=15, pady=1)
       fButtons.pack(fill=X)
       fOuter.pack(fill=X)
       self.mainWindow.pack()

       self.mainWindow.master.title("Percent bar")

    def drawBar(self):
       global x
       if x < 100 : x = x+10
       app.percentbar.coords('bar', 0, 6, x, 6)


app = ClearApp()
x = 0
app.mainWindow.mainloop()