Hello everyone,
below is a little code - what it actually does is quite self-explanatory.
(When clicking with left - draw a red circle. When the right button is pressed
switch to a different mode. Now green squares are drawn and so on.)
My question now is: Is there a way to avoid using global variables but also
avoid an object-oriented programming? In other words: Is it possible to pass
e.g. a dictionary containing some information to the function called by the
event? The reason for not wanting the object-oriented way is: We want to
teach something to students who never programmed before. And to them it would
be pretty hard if we start everything object-oriented!
Thanks for your suggestions,
Martin
···
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from pylab import *
def two_parts(event):
global program_part
if event.button == 3:
program_part = program_part%2 + 1
print " Changed to part to ", program_part
if program_part == 1 and event.button == 1:
plot([event.xdata], [event.ydata], marker = 'o', mfc = 'r')
if program_part == 2 and event.button == 1:
plot([event.xdata], [event.ydata], marker = 's', mfc = 'g')
draw()
figure(1)
ax = subplot(111, autoscale_on=False)
ax.set_xlim([0,1])
ax.set_ylim([0,1])
program_part = 1
print " Actual program part is ", program_part
connect('button_press_event', two_parts)
show()
########################################