Windows: Background Color Not Applied to child Box

[Vipul-Cariappa]

Expected Behavior

Background color should change, to the respective color set in Box widget.

Current Behavior

Background color does not change.

Steps to reproduce

from toga import App, MainWindow, Label, Box
from toga.constants import BLUE, COLUMN
from toga.style import Pack


class Application(App):
    def startup(self):

        self.main_window = MainWindow(title=self.name)

        self.frame = Box(
            children=[
                Label("Some Text ...")
                ],
            style=Pack(
                direction=COLUMN,
                background_color=BLUE
            )
        )

        self.main_window.content = Box(children=[self.frame])

        self.main_window.content.refresh()
        self.main_window.show()


if __name__ == "__main__":
    app = Application("BugApp", "App")
    app.main_loop()

Your Environment

• Python Version 3.7

• Operating System and Version

  • Other - name: - version:
  • macOS - version:
  • Linux - distro: - version:
  • Windows - Windows 10:

• Toga Version

  • 0.3.0.dev23

• Toga Target

  • android
  • cocoa
  • django
  • gtk
  • iOS
  • tvOS
  • watchOS
  • winforms
  • win32
  • Other (please specify)

[Vipul-Cariappa]

If we replace

self.main_window.content = Box(children=[self.frame])

with this

self.main_window.content = self.frame

it works fine.

[mhsmith]

Confirmed that this is still an issue on Windows with the current version of Toga. See #1684 (comment) for a more complete test case.

[freakboy3742]

Closing as a duplicate of #767