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-- File: AIS_AttributeFilter.cdl
-- Created: Tue Mar 4 17:58:52 1997
-- Author: Robert COUBLANC
-- <rob@robox.paris1.matra-dtv.fr>
---Copyright: Matra Datavision 1997
class AttributeFilter from AIS inherits Filter from SelectMgr
---Purpose: Selects Interactive Objects, which have the desired width or color.
-- The filter questions each Interactive Object in local
-- context to determine whether it has an non-null
-- owner, and if so, whether it has the required color
-- and width attributes. If the object returns true in each
-- case, it is kept. If not, it is rejected.
-- This filter is used only in an open local context.
-- In the Collector viewer, you can only locate
-- Interactive Objects, which answer positively to the
-- filters, which are in position when a local context is open.
uses
NameOfColor from Quantity,
EntityOwner from SelectMgr
is
Create returns mutable AttributeFilter from AIS;
---Purpose:
-- Constructs an empty attribute filter object.
-- This filter object determines whether selectable
-- interactive objects have a non-null owner.
Create (aCol: NameOfColor from Quantity)
returns mutable AttributeFilter from AIS;
---Purpose:
-- Constructs an attribute filter object defined by the
-- color attribute aCol.
Create (aWidth : Real from Standard)
returns mutable AttributeFilter from AIS;
---Purpose:
-- Constructs an attribute filter object defined by the line
-- width attribute aWidth.
HasColor(me) returns Boolean from Standard;
---C++: inline
---Purpose:
-- Indicates that the Interactive Object has the color
-- setting specified by the argument aCol at construction time.
HasWidth(me) returns Boolean from Standard;
---C++: inline
---Purpose:
-- Indicates that the Interactive Object has the width
-- setting specified by the argument aWidth at
-- construction time.
SetColor(me:mutable;aCol: NameOfColor from Quantity);
---C++: inline
---Purpose: Sets the color aCol.
-- This must be chosen from the list of colors in Quantity_NameOfColor.
SetWidth(me:mutable;aWidth : Real from Standard);
---C++: inline
---Purpose: Sets the line width aWidth.
UnsetColor(me:mutable);
---C++: inline
---Purpose:
-- Removes the setting for color from the filter.
UnsetWidth(me:mutable);
---C++: inline
---Purpose:
-- Removes the setting for width from the filter.
IsOk(me;anObj : EntityOwner from SelectMgr)
returns Boolean from Standard is redefined virtual;
---Purpose: Indicates that the selected Interactive Object passes
-- the filter. The owner, anObj, can be either direct or
-- user. A direct owner is the corresponding
-- construction element, whereas a user is the
-- compound shape of which the entity forms a part.
-- If the Interactive Object returns Standard_True
-- when detected by the Local Context selector through
-- the mouse, the object is kept; if not, it is rejected.
fields
myCol : NameOfColor from Quantity;
myWid : Real from Standard;
hasC,hasW : Boolean from Standard;
end AttributeFilter;
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