drag-and-drop-mouse-moved

Arguments: drag-widget object-under-mouse screen-position object-position

This function is called each time the mouse cursor moves during a call to drag-and-drop. The default method does nothing, but an application could add methods if it needs to trigger arbitrary side effects as the user moves the mouse. One example might be to scroll a window in which a drag is intended to be confined if the user moves the mouse outside of that window.

drag-widget is the widget that is being dragged.

object-under-mouse is the widget or window that is currently under the mouse cursor, if any, and nil otherwise.

screen-position is the current mouse cursor position in screen coordinates.

object-position is the current mouse cursor position in the coordinate system of the object-under-mouse if it is non-nil, and otherwise is nil.

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This page was not revised from the 8.2 page.
Created 2012.5.30.