-- File:	Prs3d_LengthAspect.cdl
-- Created:	Thu Jun  3 09:28:46 1993
-- Author:	Jean-Louis FRENKEL
--		<jlf@stylox>
---Copyright:	 Matra Datavision 1993

class LengthAspect from Prs3d inherits CompositeAspect from Prs3d

    	---Purpose: defines the attributes when drawing a Length Presentation.
uses 

    AspectLine3d from Graphic3d,
    ArrowAspect from Prs3d,
    LineAspect from Prs3d,
    TextAspect from Prs3d,
    NameOfColor from Quantity,
    TypeOfLine from Aspect,
    PlaneAngle from Quantity

is

-- 
--  Attributes for the lines.
-- 
    Create returns mutable LengthAspect from Prs3d;
    	--- Purpose: Constructs an empty framework to define the display of lengths.   
    
    LineAspect(me) returns mutable LineAspect from Prs3d;
    	---Purpose: Returns the settings for the display of lines used in presentation of lengths.    
    
    SetLineAspect(me: mutable; anAspect: LineAspect from Prs3d);
    	---Purpose: Sets the display attributes of lines used in presentation of lengths.

    Arrow1Aspect(me) returns mutable ArrowAspect from Prs3d is static;
    	--- Purpose: Returns the settings for displaying a right-pointing arrow.   
    
    SetArrow1Aspect(me: mutable; anAspect: ArrowAspect from Prs3d) is static;
    	---Purpose:   Sets the display attributes of the first arrow used in presentation of lengths. 
        
    Arrow2Aspect(me) returns mutable ArrowAspect from Prs3d is static;
    	--- Purpose: Returns the settings for displaying a left-pointing arrow.   
    
    SetArrow2Aspect(me: mutable ; anAspect: ArrowAspect from Prs3d) is static;
    	---Purpose: Sets the display attributes of the second arrow used in presentation of lengths.
    
    TextAspect(me) returns mutable TextAspect from Prs3d is static;
    	--- Purpose: Returns the settings for the display of text used in presentation of lengths.   
    
    SetTextAspect(me:mutable; anAspect: TextAspect from Prs3d) is static; 
    	---Purpose: Sets the display attributes of text used in presentation of lengths.
    
    SetDrawFirstArrow(me: mutable; draw: Boolean from Standard) is static;
    	--- Purpose: Sets the DrawFirstArrow attributes to active. 
    
    DrawFirstArrow(me) returns Boolean from Standard is static;
    	---Purpose: Returns true if the first arrow can be drawn.    
    SetDrawSecondArrow(me: mutable; draw: Boolean from Standard) is static;
    	---Purpose: Sets the DrawSecondArrow attributes to active.    
    
    DrawSecondArrow(me) returns Boolean from Standard is static;
    	---Purpose: Returns true if the second arrow can be drawn.   
    Print(me; s: in out OStream from Standard) is static;
   
fields

    myLineAspect: LineAspect from Prs3d;
    myArrow1Aspect: ArrowAspect from Prs3d;
    myArrow2Aspect: ArrowAspect from Prs3d;
    myTextAspect: TextAspect from Prs3d;
    myDrawFirstArrow: Boolean from Standard;
    myDrawSecondArrow: Boolean from Standard;
    
end LengthAspect from Prs3d;