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Harris Geospatial / Docs Center / Libraries / CATALYST / BOX__DEFINE

BOX__DEFINE

BOX__DEFINE

Name


      BOX__DEFINE

Purpose



      The purpose of this routine is to provide a rectangle or box that can be displayed
      in a direct graphics draw widget. The coordinate system of the Box
      object is either passed to it (a CatCoord object) or is a normalized
      coordinate system by default.

Authors



        FANNING SOFTWARE CONSULTING BURRIDGE COMPUTING
        1645 Sheely Drive 18 The Green South
        Fort Collins Warborough, Oxon
        CO 80526 USA OX10 7DN, ENGLAND
        Phone: 970-221-0438 Phone: +44 (0)1865 858279
        E-mail: davidf@dfanning.com E-mail: davidb@burridgecomputing.co.uk

Category



      Objects.

Syntax



      boxObject = Obj_New("BOX", X1=0.5, Y1=0.5, X2=0.75, Y2=0.75)
      drawObject -> Add, boxObject

Superclasses



      SELECTABLEOBJECT
      CATDATAATOM
      CATATOM
      CATCONTAINER IDLITCOMPONENT
      IDL_CONTAINER

Class Structure



  class = { BOX, $
            clip_to_data: 0B, $ ; Flag that if set will allow clipping to data range in DRAW method.
            layerObject: Obj_New(), $ ; A CATLAYER object for holding the annotation.
            linestyle: 0L, $ ; The line style of the box.
            midx: 0.0, $ ; The midpoint of the box in X.
            midy: 0.0, $ ; The midpoint of the box in Y.
            modemap: Obj_New(), $ ; A pixmap for calculating "mode".
            moveend: 0L, $ ; Indicates which end of box you are moving.
            thickness: 0.0, $ ; The thickness of the box.
            x1: 0.0, $ ; The X location for lower-left corner of the box.
            y1: 0.0, $ ; The Y location for lower-left corner of the box.
            x2: 0.0, $ ; The X location for upper-right corner of the box.
            y2: 0.0, $ ; The Y location for upper-right corner of the box.
            sx: 0L, $ ; The static X location.
            sy: 0L, $ ; The static Y location.
            INHERITS SelectableObject $
          }

Messages



  BOX_CHANGED: This message is sent whenever SetProperty method is called and the NOMESSAGE
                  keyword is NOT set.

Event Structure



      This object will add the following fields to the event structure created by an interaction.
      The fields are defined as:
      BOUNDARY_BOX: A 2x5 element array in normalized coordinates giving the boundary box of
                        the object.
      XPTS: A two element array giving the X values of the lower-left and upper-right
                        corners of the box in data coordinates.
      YPTS: A two element array giving the Y values of the lower-left and upper-right
                        corners of the box in data coordinates.

Modification History



      Written by: David W. Fanning, 25 Jan 2004.
      Added ability to draw box on map with MAPCOORD object. 14 June 2009. DWF.



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