"Bob Greschke" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] >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 the objects with 10-pixel >wide ovals and rectangles. Now I want to zoom in (or out), but I don't >want the ovals and rectangles to change size. I just want them to spread >out or get closer together. So scale() doesn't seem to be the way to go. >What I want to do is just make the "logical" canvas bigger and replot >everything, but when I reconfigure the canvas size to make it bigger the >Toplevel frame itself gets bigger. I want the frame to stay the same size, >but still be resizable. I have scrollbars, and they seem to work ok, and >scrollregion seems to do what it should, but I can't figure out how to get >them to all work together to do what I want. Help? > > Thanks! > > Bob
After further fiddling... I think I kind of figured this out. I could tell my plotting routine that the canvas was twice as large as I originally made it, and it would draw everything (i.e. if I drug the frame larger I could see more stuff off the edge of the canvas), but the scrollbars would not "activate" so I could scroll over to stuff off the edge of the canvas. What I was doing wrong was not setting the scrollregion to the whole new canvas size that I used for plotting. I kept setting it to the size of the visible canvas in the frame or not setting it at all. I almost understand. :) Now all I have to do is be able to grab the canvas and drag it around with the mouse and click on a spot and have it center that spot and zoom in there. Bob -- http://mail.python.org/mailman/listinfo/python-list