Pmw ScrolledCanvas: line, oval, text
#Pmw copyright
#Copyright 1997-1999 Telstra Corporation Limited, Australia
#Copyright 2000-2002 Really Good Software Pty Ltd, Australia
#Permission is hereby granted, free of charge, to any person obtaining a copy
#of this software and associated documentation files (the "Software"), to deal
#in the Software without restriction, including without limitation the rights
#to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#copies of the Software, and to permit persons to whom the Software is furnished
#to do so, subject to the following conditions:
#The above copyright notice and this permission notice shall be included in all
#copies or substantial portions of the Software.
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
#INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
#PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
#HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
#OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
#SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
title = 'Pmw.ScrolledCanvas demonstration'
# Import Pmw from this directory tree.
import sys
sys.path[:0] = ['../../..']
import Tkinter
import Pmw
class Demo:
def __init__(self, parent):
# Create the ScrolledCanvas.
self.sc = Pmw.ScrolledCanvas(parent,
borderframe = 1,
labelpos = 'n',
label_text = 'ScrolledCanvas',
usehullsize = 1,
hull_width = 400,
hull_height = 300,
)
# Pack this last so that the buttons do not get shrunk when
# the window is resized.
self.sc.pack(padx = 5, pady = 5, fill = 'both', expand = 1)
self.sc.component('canvas').bind('<1>', self.addcircle)
testEntry = Tkinter.Entry(parent)
self.sc.create_line(20, 20, 100, 100)
self.sc.create_oval(100, 100, 200, 200, fill = 'green')
self.sc.create_text(100, 20, anchor = 'nw',
text = 'Click in the canvas\nto draw ovals',
font = testEntry.cget('font'))
# Set the scroll region of the canvas to include all the items
# just created.
self.sc.resizescrollregion()
self.colours = ('red', 'green', 'blue', 'yellow', 'cyan', 'magenta',
'black', 'white')
self.oval_count = 0
self.rand = 12345
def addcircle(self, event):
x = self.sc.canvasx(event.x)
y = self.sc.canvasy(event.y)
width = 10 + self.random() % 100
height = 10 + self.random() % 100
self.sc.create_oval(
x - width, y - height, x + width, y + height,
fill = self.colours[self.oval_count])
self.oval_count = (self.oval_count + 1) % len(self.colours)
self.sc.resizescrollregion()
# Simple random number generator.
def random(self):
self.rand = (self.rand * 125) % 2796203
return self.rand
######################################################################
# Create demo in root window for testing.
if __name__ == '__main__':
root = Tkinter.Tk()
Pmw.initialise(root)
root.title(title)
exitButton = Tkinter.Button(root, text = 'Exit', command = root.destroy)
exitButton.pack(side = 'bottom')
widget = Demo(root)
root.mainloop()
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