Viewport stuck after closing when executing blocking instructions afterwards on MacOS

[UGLimusic]

OS : MacOS 12.1
Machine : MacBook Air (13-inch, Early 2015) 1,6 GHz Dual-Core Intel Core i5
Python : 3.10.1
DearPyGui : 1.3.1

import dearpygui.dearpygui as dpg

dpg.create_context()
dpg.create_viewport()
# here happens the DPG magic :)
dpg.setup_dearpygui()
dpg.show_viewport()
dpg.start_dearpygui()
dpg.destroy_context()

# Then I'd like the viewport to close and do something like
a = input() # this is what I name a "blocking instruction"
# but DPG won't close

[Mstpyt]

On Windows it works with the render_loop method:

import dearpygui.dearpygui as dpg

dpg.create_context()
dpg.create_viewport()
# here happens the DPG magic :)
dpg.setup_dearpygui()
dpg.show_viewport()
while dpg.is_dearpygui_running():
    dpg.render_dearpygui_frame()
else:
    dpg.destroy_context()
    a = input("enter something:")

[hoffstadt]

Will check on this!

[krister-ts]

DearPyGui/DearPyGui/src/modules/dearpygui_commands.h

Line 2518 in 03a804e

viewport->running = false;

Maybe mvCleanupViewport needs to be called if running flag is cleared? I don't see anything that is testing this flag. All I could see was glfw's "should close" also clearing this flag.

I hope that helps. I may be mistaken though.

I too would like to close the viewport.

[krister-ts]

@hoffstadt This is not isolated to MacOS. I am running windows 10.

[crnbaker]

Related to this: on both macOS (12.2.1 on M1 Pro) and Windows (10 Enterprise 21H1 on Xeon), if you create another context and viewport immediately after destroying one, the first viewport doesn't close until the second context is destroyed (I appreciate this is possibly a bad design though!):

import dearpygui.dearpygui as dpg


def temporary_viewport(lifetime_in_frames: int) -> None:
    dpg.create_context()
    dpg.create_viewport(title="Test", width=800, height=340)

    with dpg.window(label="Test", tag="Test"):
        dpg.add_text(f"Lifetime of this viewport should be {lifetime_in_frames} frames")

    dpg.setup_dearpygui()
    dpg.show_viewport()

    frame_count = 0
    while dpg.is_dearpygui_running():
        frame_count += 1
        if frame_count > lifetime_in_frames:
            dpg.stop_dearpygui()
            dpg.destroy_context()
            break
        dpg.render_dearpygui_frame()

    print("Done")


if __name__ == "__main__":

    temporary_viewport(lifetime_in_frames=60)  # blocks for 60 frames
    # would expect first viewport to disappear here

    temporary_viewport(lifetime_in_frames=600)  # but now we end up with two viewports
    # and both of them disappear after a further 600 frames

[bandit-masked]

Issue for an old version of DPG. Closing.