| The Information Overlaid Toolkit: ; Referance Manual Edition 2.2, for Information Overlaid Version 2.3; 25th October 2002 |  | ||
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| The Information Overlaid Toolkit: ; Referance Manual Edition 2.2, for Information Overlaid Version 2.3; 25th October 2002 | | ||
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The kind of interface wher ethe user has to drag a cross or whatever to indicate a location is so common that this library is included to do all the work for you.
Behaves like markers_add_display except that it returns a special movable marker. The arguments are parallel to those of markers_add_display.
Removes the marker from the screen and makes the positon available by caling marker_drag_update.
Ensures that the position of the marker is available as mk.cx and mk.cy.