box-to-drag

Arguments: dialog-item

Should return a box indicating the section of the control's image that should be dragged along with the mouse cursor during a drag-and-drop gesture (see drag-and-drop). The box should be relative to the upper left corner of the scrollable contents of the control.

Methods are supplied for most controls to return the area occupied by the currently selected value of the control.

This image is used only if

(drag-images (configuration *system*))

has been set to true. It is nil by default. (See drag-images, configuration, and *system*.)

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This page was not revised from the 10.0 page.
Created 2019.8.20.