imgui incorrectly centred on Linux multi-monitor setup

[splondike]

On i3 and GNOME3 for talon stable (0.2.2) and talon beta (v0.2.0-94-g4a40) the following code does not correctly centre the imgui window for a certain multi-monitor/primary configuration:

from talon import imgui, ui

@imgui.open()
def test(gui):
    gui.text("Test window")

test.show()
rect = test._canvas.rect
print("Screens: ", ui.screens())
print("Expected x/y: ", (1600 - rect.width) / 2, (900 - rect.height) / 2)
print("Actual: ", rect)

I have monitors A: 1600x900 and B: 1920x1080. In xrandr I have A at offset 0,0 and B at offset 1600,0. If I make A the xrandr primary then the above code prints out the expected answer (under v0.2.0-94-g4a40):

Screens:  [Screen(x=0, y=0, size=(1600, 900), mm=(344.000, 194.000)), Screen(x=1600, y=0, size=(1920, 1080), mm=(509.000, 286.000))]
Expected x/y:  755.0 437.0
Actual:  Rect(755.0, 437.0, 90.0, 26.0)

If I make B the primary and restart Talon then it prints out the wrong answer:

Screens:  [Screen(x=1600, y=0, size=(1920, 1080), mm=(509.000, 286.000)), Screen(x=0, y=0, size=(1600, 900), mm=(344.000, 194.000))]
Expected x/y:  755.0 437.0
Actual:  Rect(915.0, 527.0, 90.0, 26.0)

[lunixbochs]

Ah I bet it's expecting the primary monitor at 0,0 - I likely just need to add the offset now that I've added support for Linux primary monitor assignments that aren't at 0,0

[lunixbochs]

Fixed in the v0.2.0-101 beta.