A background of NULL means that the window won't have any background. On the
X11 backend it's also possible to inherit the background from the parent
window using X11.getParentRelativePattern.
The windowing system will normally fill a window with its background
when the window is obscured then exposed.
Sets the background of window.
A background of NULL means that the window won't have any background. On the X11 backend it's also possible to inherit the background from the parent window using X11.getParentRelativePattern.
The windowing system will normally fill a window with its background when the window is obscured then exposed.