[Image-SIG] Tkinter Scroll Bar Widget
K Schutte
schutte at fel.tno.nl
Thu Nov 27 11:20:46 EST 2003
Siva,
Without sending you our complete application (which is proprietary),
see below the excerpt which seems to handle the scrollbars.
I know it did take quite some effort to get it working. Sending back
any improvements is appreciated!
Klamer
#
# The Python Imaging Library
# $Id: viewer.py,v 1.6 2003/10/28 10:51:45 kscp1 Exp $
#
from Tkinter import *
import Image, ImageTk, jfloatimage, jfloatimagec #, Pmw
import time, Queue
import threading, sys, os
#
# an image viewer
class UI(Canvas):
def __init__(self, master, im, scroll = None):
if im.mode == "1":
# bitmap image
self.image = ImageTk.BitmapImage(im, foreground="white")
Label.__init__(self, master, image=self.image, bg="black", bd=0)
else:
# photo image
#scx.grid(row=1,column=0,sticky=E+W)
(w,h)=im.size
Canvas.__init__(self,master, height=h,width=w,borderwidth=0)
if (w > 512) or (h > 512) or (scroll != None):
self.scroll = 1
scy=Scrollbar(master)
scy.pack(side=RIGHT,fill=Y)
scx=Scrollbar(master,orient=HORIZONTAL)
scx.pack(side=BOTTOM,fill=X)
if (scroll != None):
self.config(xscrollcommand=scx.set,
yscrollcommand=scy.set,
scrollregion=(0,0,w,h), height=512,width=512)
else:
self.config(xscrollcommand=scx.set,
yscrollcommand=scy.set,
scrollregion=(0,0,w,h))
scx.config(command=self.xview)
scy.config(command=self.yview)
#self.grid(row=0,column=0,sticky=N+S+E+W)
self.image = ImageTk.PhotoImage(im)
self.canvasImage=self.create_image(0,0,image=self.image,anchor=NW)
Siva Chandra wrote:
>
> Hello,
>
> I have been using Tkinter for some time but now I am
> having to use a scroll bar for my image processing
> project. Can I get complete info on using the scroll
> bar widget. I am unable to control the lenght of the
> scroll and the tutorial isn't complete on this.
> Currently I am simulating a scroll bar using the scale
> widgets which is very-very slow.
>
> thanx
>
> =====
> Siva Chandra
> B-Tech, Electrical Engineering,
> IIT Madras.
> Currently pursuing MS by research at IIIT, Hyderabad
> visit www.geocities.com/sivachandra_br
>
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--
Klamer Schutte, E-mail: Schutte at fel.tno.nl
Intelligent Cameras, TNO Physics and Electronics Laboratory
Tel: +31-70-3740469 -- Fax: +31-70-3740654 -- Mobile: +31-6-51316671
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