Feature request: with function()-Feature

[kantel]

Processing.py has some syntatic sugar with the with function()-Feature (I documented it here – sorry in German only). With its indents it feels more pythonic the push_matrix() … pop_matrix(). I missed these feature in Py5 and I would like to have it.

But it's not a show stopper and not very urgent. I only want to say that there is something missing. And pls excuse my bad (d)english.

BTW: I'm working with Py5 on macOS X (Catalina 10.15.7) with Thonny and Tristan Bunn's Thonny-Plugin for Py5.

[hx2A]

@kantel Thank you for the suggestion! I understand what you are asking for: I recall @villares mentioned this feature a while back. I agree, it would be nice syntactic sugar to have in py5. I'll work on adding it for the next release. I don't think I can make it exactly as it is in processing.py, but I will do what I can to make it as close as possible.

[hx2A]

@kantel I started working on this today and have a working prototype. The following code works, demonstrating that the push_matrix() context manager is re-entrant and can still be used the regular way.

size(250, 250)
rect_mode(CENTER)

translate(50, 50)
rect(0, 0, 20, 20)

with push_matrix():
    translate(50, 50)
    rect(0, 0, 15, 15)
    with push_matrix():
        translate(50, 50)
        rect(0, 0, 10, 10)
        push_matrix()
        translate(50, 50)
        rect(0, 0, 5, 5)
        pop_matrix()

rect(0, 0, 5, 5)

Later this week I'll expand it to work for push_style(), begin_shape(), etc.

[kantel]

Cool. Thanks!

[hx2A]

I was feeling inspired and now have begin_shape() and begin_closed_shape() working:

size(250, 250)

translate(125, 125)
with begin_closed_shape():
    vertex(-50, -50)
    vertex(50, -50)
    vertex(50, 50)
    vertex(-50, 50)

begin_closed_shape() was the hard part. Now that that's done, I just have to add the feature to the relevant functions and update the reference documentation.

[hx2A]

I finished this a few days ago. Next release will be in October sometime.