default-cell-border-color

Arguments: grid-widget-or-section

Returns the color, if one has been specified, that will be used by default to draw the row and column borders within the specified grid-section or within all of the grid-row-sections and grid-column-sections of the specified grid-widget. The setf of this function may be called to change the color, at which time the grid will be drawn as needed to display the new color. This default may be overridden by specifying the border-color property of individual grid-row and grid-column instances.

The value may be either an RGB color object (as returned by make-rgb or ask-user-for-color), or a symbol whose global value is an RGB object, or nil. The initial value is nil. When nil, effective-border-color will find a color to use in some other way.

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Created 2019.8.20.