ancestor-background-color

Arguments: outline

Returns the value of the ancestor-background-color property of an outline control. The value may be specified at creation time by passing the ancestor-background-color initarg to make-instance, or any time later by calling (setf ancestor-background-color).

This is the color in which the background of ancestor outline-items of the currently selected item will be drawn if the highlight-ancestors property is true.

The value should always be an RGB color object, as made with make-rgb. The default value is a "slate blue" made with (make-rgb :red 235 :green 235 :blue 250).

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Created 2019.8.20.