dragging-thickness

Arguments: split-bar

Returns the dragging-thickness property of a split-bar widget. The value may be set at creation time by passing the :dragging-thickness initarg to make-instance, or any time later by call (setf dragging-thickness).

This is the visible thickness of the split-bar widget while it is being dragged, measured in pixels. The value should be a non-negative integer. The default value is 3, to draw a dragging line that's thinner than the mouseable thickness. The value may be set at creation time by passing the :dragging-thickness initarg to make-instance, or any time later by call (setf dragging-thickness).

The mouseable thickness is specified with the bar-thickness property.

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Created 2015.5.21.