473,224 Members | 1,714 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,224 software developers and data experts.

Tough Tkinter Scrollregion vs Window Size Problem


Below is a simple code snippet showing a Tkinter Window bearing a
canvas and 2 connected scrollbars (Vertical & Horizontal). Works fine.
When you shrink/resize the window the scrollbars adjust accordingly.
However, what I really want to happen is that the area of the canvas
that the scrollbars show (the Scrollregion) should expand as the window
grows. It doesn't currently do this. although, if the window shrinks
smaller than the original canvas-size, then the scrollregion adjusts
properly.
How can I make it such that the Scrollregion fills the entire space
avaialable to it. I tried all permutations of setting
expand=Tkinter.YES and fill=Tkinter.BOTH in the pack command??
-Saqib

----------------------------------------------------

import Tkinter

class testApp2:

def _setupCanvas(self):
self._canvasFrame = Tkinter.Frame(self._overallFrame, bd=1,
relief=Tkinter.SUNKEN)
self._canvasFrame.pack(expand=Tkinter.YES, fill=Tkinter.BOTH)

self._canvas = Tkinter.Canvas(self._canvasFrame,
background="white", width=self._canvasWidth,
height=self._canvasHeight,)
# Scroll Bars
vScrollbar = Tkinter.Scrollbar(self._canvasFrame)
hScrollbar = Tkinter.Scrollbar(self._canvasFrame)

# Scroll Bars
vScrollbar = Tkinter.Scrollbar(self._canvasFrame)
vScrollbar.pack(side=Tkinter.LEFT, expand=Tkinter.NO,
fill=Tkinter.NONE)

hScrollbar = Tkinter.Scrollbar(self._canvasFrame)
hScrollbar.pack(side=Tkinter.TOP, expand=Tkinter.NO,
fill=Tkinter.NONE)

# Configure
self._parent.rowconfigure(0, weight=1)
self._parent.columnconfigure(0, weight=1)
# self._scrollX0 = self._scrollY0 = 0
# self._scrollX1 = self._canvasWidth
# self._scrollY1 = self._canvasHeight
print "self._canvasWidth = %s" % self._canvasWidth
print "self._canvasHeight = %s" % self._canvasHeight
# print "self._scrollX1 = %s" % self._scrollX1
# print "self._scrollY1 = %s" % self._scrollY1
self._canvas.config(
width=self._canvasWidth,
height=self._canvasHeight,
scrollregion=(0,0, self._canvasWidth, self._canvasHeight),
yscrollcommand=vScrollbar.set,
xscrollcommand=hScrollbar.set,
)

vScrollbar.config(orient=Tkinter.VERTICAL,
command=self._canvas.yview)
hScrollbar.config(orient=Tkinter.HORIZONTAL,
command=self._canvas.xview)

self._canvasFrame.pack()
self._canvas.pack(expand=Tkinter.YES, fill=Tkinter.BOTH)
vScrollbar.pack(side=Tkinter.RIGHT, expand=Tkinter.YES,
fill=Tkinter.Y)
hScrollbar.pack(side=Tkinter.BOTTOM, expand=Tkinter.YES,
fill=Tkinter.X)


def __init__(self, parent):
self._parent = parent

self._overallFrame = Tkinter.Frame(self._parent, bd=1,
relief=Tkinter.SUNKEN)
self._overallFrame.pack(expand=Tkinter.YES, fill=Tkinter.BOTH)
self._canvasWidth = 300
self._canvasHeight = 250
self._setupCanvas()
self._setCallBacks()



def _setCallBacks(self):
# Function Bindings
self._canvas.bind("<Button-1>", self._b1PressEvt)

def _b1PressEvt(self, event):
print self._canvas.config('scrollregion')
print self._canvas.config('width')
print self._canvas.config('height')
print "=" * 50
print "\n"

root = Tkinter.Tk()
app = testApp2(root)
root.mainloop()

Aug 4 '05 #1
0 3551

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
by: Fuzzyman | last post by:
I'm having trouble implementing my GUI using Tkinter...... I've been working through the Tkinter tutorials from 'Programming Python' and am generally happy enough with the functionality and feel...
1
by: Pekka Niiranen | last post by:
Hi there, after reading TkInter/thread -recipe: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965 I wondered if it was possible to avoid using threads for the following problem: ...
1
by: syed_saqib_ali | last post by:
Please take a look at and run the code snippet shown below. It creates a canvas with vertical & Horizontal scroll-bars. If you shrink the window to smaller than the area of the canvas, the...
0
by: Stewart Midwinter | last post by:
I have a Tkinter app running on cygwin. It includes a Test menu item that does nothing more than fetch a directory listing and display it in a Toplevel window (I'd use a tkMessageBox showinfo...
1
by: Bob Greschke | last post by:
I have a program that sucks in a list of equipment positions (Lats/Longs), opens a Toplevel frame with a canvas set to, for example, 700x480 pixels, and then does all of the calculations and plots...
2
by: jim-on-linux | last post by:
py help, The file below will run as a stand alone file. It works fine as it is. But, when I call it from another module it locks my computer, The off switch is the only salvation. This...
4
by: D | last post by:
I'm sure this is a simple question to the Tkinter experts - I have a very basic Tkinter application that consists of 1 master window and buttons within that window. My problem is that, I need to...
0
by: WaterWalk | last post by:
Hello. When I tried to make Tkinter canvas widget respond to MouseWheel event on Windows XP, I failed. The canvas just doesn't receive MouseWheel event. I used bind_all to find out which widget...
3
by: Nebulism | last post by:
Hi everyone, I am working on a module for my GUI that shows one image with an index value below and would use a scrollbar to control which of the images are displayed. The images are stored in a...
0
by: VivesProcSPL | last post by:
Obviously, one of the original purposes of SQL is to make data query processing easy. The language uses many English-like terms and syntax in an effort to make it easy to learn, particularly for...
3
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 3 Jan 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). For other local times, please check World Time Buddy In...
0
by: jianzs | last post by:
Introduction Cloud-native applications are conventionally identified as those designed and nurtured on cloud infrastructure. Such applications, rooted in cloud technologies, skillfully benefit from...
0
by: abbasky | last post by:
### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method...
2
by: jimatqsi | last post by:
The boss wants the word "CONFIDENTIAL" overlaying certain reports. He wants it large, slanted across the page, on every page, very light gray, outlined letters, not block letters. I thought Word Art...
0
by: fareedcanada | last post by:
Hello I am trying to split number on their count. suppose i have 121314151617 (12cnt) then number should be split like 12,13,14,15,16,17 and if 11314151617 (11cnt) then should be split like...
0
by: stefan129 | last post by:
Hey forum members, I'm exploring options for SSL certificates for multiple domains. Has anyone had experience with multi-domain SSL certificates? Any recommendations on reliable providers or specific...
1
by: davi5007 | last post by:
Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the...
0
by: MeoLessi9 | last post by:
I have VirtualBox installed on Windows 11 and now I would like to install Kali on a virtual machine. However, on the official website, I see two options: "Installer images" and "Virtual machines"....

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.