How do I use multi touch in a Python paint program?

Question

I'm building a simple paint program in Python as a project, using Pygame it works by basically drawing a stream of circles when the mouse gets pressed and you drag it around the surface, it's got a couple other little things going on but the thing I want to ask is, is there a way to change the singular mouse input you know mouse.get_pressed to either multiple mouse inputs at one time or a multi-touch input into the point list that's streaming the circles.

running= True

while running:

if buttons[0] == True:
    x,y = pygame.mouse.get_pos()

    if x> PA+AS:
        xShift = x - PA - AS
        pygame.draw.circle(pArea,DRAW_CLR,(xShift,y),BRUSHSIZE)
        pygame.display.flip()

so this is the part of the code I really want to change more or less. Just so that instead of just one mouse, I could use my touchscreen to draw with maybe two finger.

I can try i guess so running= True while running: if buttons[0] == True: x,y = pygame.mouse.get_pos() if x> PA+AS: xShift = x - PA - AS pygame.draw.circle(pArea,DRAW_CLR,(xShift,y),BRUSHSIZE) pygame.display.flip() pArea being the subsurface i'm drawing on and PA and AS being ints relative to the size of the surface. basically instead of just drawing with one input (the mouse) i wondered if there was a way to utilize my computers touchscreen, and draw with more then one finger at a time and how to do that. — Austen Vigneux
– Austen Vigneux, Commented Jan 22, 2015 at 4:54
You can update your question with your code. Avoid to add it in comments. — NPatel
– NPatel, Commented Jan 22, 2015 at 4:56

Vincenzooo · Accepted Answer · 2021-11-25 00:29:13Z

2

Latest versions of pygame support multitouch input (and I believe also gestures).

The events which control it are pygame.FINGERDOWN, .FINGERUP and .FINGERMOTION. My understanding is that they work like mouse inputs, but can be multiple and can be distinguished by means of an event.finger_id property.

An example can be found here: https://www.patreon.com/posts/finger-painting-43786073?l=fr

answered Nov 25, 2021 at 0:29

Vincenzooo

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Comments

spirulence · Accepted Answer · 2015-01-22 05:46:54Z

0

You're going to have a difficult time if you insist on doing this in PyGame. Your best bet for multitouch in Python is Kivy, which was a very solid framework a few years ago when I used it and appears to have only gotten better since.

The disadvantage of switching to Kivy is a more complicated API, but this tutorial seems spot-on for what you're trying to do.

answered Jan 22, 2015 at 5:46

spirulence

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2 Comments

Austen Vigneux Over a year ago

the advice is appreciated thank you. but for the purpose of this program it would be best if i dound some way to do it in PyGame. I'll try kivy if i run out of options

Vincenzooo Over a year ago

last version of pygame (I think it's version 2), supports multitouch. An example can be found here patreon.com/posts/finger-painting-43786073?l=fr

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