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Raspberry Pi 3 Cookbook for Python Programmers - Third Edition
book

Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

by Steven Lawrence Fernandes, Tim Cox
April 2018
Beginner content levelBeginner
552 pages
13h 58m
English
Packt Publishing
Content preview from Raspberry Pi 3 Cookbook for Python Programmers - Third Edition

How to do it...

Create the following script, painting.py:

#!/usr/bin/python3 #painting.py import tkinter as TK #Set defaults btn1pressed = False newline = True def main(): root = TK.Tk() the_canvas = TK.Canvas(root) the_canvas.pack() the_canvas.bind("<Motion>", mousemove) the_canvas.bind("<ButtonPress-1>", mouse1press) the_canvas.bind("<ButtonRelease-1>", mouse1release) root.mainloop() def mouse1press(event): global btn1pressed btn1pressed = True def mouse1release(event): global btn1pressed, newline btn1pressed = False newline = True def mousemove(event): if btn1pressed == True: global xorig, yorig, newline if newline == False: event.widget.create_line(xorig,yorig,event.x,event.y, smooth=TK.TRUE) newline = False xorig = event.x yorig = event.y ...
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Raspberry Pi for Python Programmers Cookbook - Second Edition

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Publisher Resources

ISBN: 9781788629874Supplemental Content