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-- File: Graphic2d_SetOfSegments.cdl
-- Created: Thu April 13 16:36:51 1993
-- Author: Gerard GRAS
-- <gg@stylox>
---Copyright: Matra Datavision 1993
class SetOfSegments from Graphic2d inherits Line from Graphic2d
---Version:
---Purpose: The primitive SetOfSegments
-- Warning: This primitive must be use as possible for performance
-- improvment but is drawn with a global line attributes
-- for all the set.
-- But when the set contains a lot of contigous segments
-- with a line attrib different to the default,it's
-- more preferable to use a SetOfPolylines for to insure
-- a better quality.
-- NOTE: than the method PickedIndex() permits to known
-- the last picked segment in the set.
---References:
uses
Drawer from Graphic2d,
GraphicObject from Graphic2d,
Length from Quantity,
SequenceOfShortReal from TShort,
FStream from Aspect,
IFStream from Aspect
raises
SegmentDefinitionError from Graphic2d,
OutOfRange from Standard
is
-------------------------
-- Category: Constructors
-------------------------
Create (aGraphicObject: GraphicObject from Graphic2d)
returns mutable SetOfSegments from Graphic2d;
---Level: Public
---Purpose: Creates an empty set of segments in the graphic
-- object <aGraphicObject>.
---Category: Constructors
Add(me : mutable; X1, Y1, X2, Y2: Length from Quantity)
---Level: Public
---Purpose: Add a segment in the set
-- The first point is <X1>, <Y1>.
-- The second point is <X2>, <Y2>.
-- Trigger: Raises SegmentDefinitionError if the
-- first point and the second point are identical.
raises SegmentDefinitionError from Graphic2d;
---Category: Update method
Length(me) returns Integer from Standard;
---Level: Public
---Purpose: Returns the number of segments in the set.
---Category: Inquiry method
Values( me;
aRank: Integer from Standard;
X1, Y1, X2, Y2: out Length from Quantity )
---Level: Public
---Purpose: Returns the segment of rank <aRank> from the set.
-- Trigger: Raises OutOfRange if <aRank> is <1 or >Length()
raises OutOfRange from Standard;
---Category: Inquiry method
--------------------------
-- Category: Draw and Pick
--------------------------
Draw (me : mutable; aDrawer: Drawer from Graphic2d)
is static protected;
---Level: Internal
---Purpose: Draws the set of segments <me>.
DrawElement( me : mutable; aDrawer: Drawer from Graphic2d;
anIndex: Integer from Standard)
is redefined protected;
---Level: Internal
---Purpose: Draws element <anIndex> of the set <me>.
DrawVertex( me : mutable; aDrawer: Drawer from Graphic2d;
anIndex: Integer from Standard)
is redefined protected;
---Level: Internal
---Purpose: Draws vertex <anIndex> of the set <me>.
Pick (me : mutable; X, Y: ShortReal from Standard;
aPrecision: ShortReal from Standard;
aDrawer: Drawer from Graphic2d)
returns Boolean from Standard
is static protected;
---Level: Internal
---Purpose: Returns Standard_True if one segment of the set <me>
-- is picked, Standard_False if not.
-- Warning: The PickIndex() method returns the rank of the picked
-- segment if any.
----------------------------------------------------------------------
Save( me; aFStream: in out FStream from Aspect ) is virtual;
-- Retrieve( me; aIFStream: in out IFStream from AIS2D ) is virtual;
fields
myX1: SequenceOfShortReal from TShort;
myY1: SequenceOfShortReal from TShort;
myX2: SequenceOfShortReal from TShort;
myY2: SequenceOfShortReal from TShort;
end SetOfSegments from Graphic2d;
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