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-- File: Graphic2d_ViewMapping.cdl
-- Created: Tue Jul 13 09:19:31 1993
-- Author: Jean Louis FRENKEL
-- <jlf@stylox>
---Copyright: Matra Datavision 1993
class ViewMapping from Graphic2d inherits TShared from MMgt
---Version:
---Purpose: A ViewMapping defines a square region of the model
-- space from an origin point and a size in meters.
-- This square region is called the "map from".
---Keywords:
---Warning:
---References:
uses
Length from Quantity,
Factor from Quantity
is
-------------------------
-- Category: Constructors
-------------------------
Create
returns mutable ViewMapping from Graphic2d;
---Level: Public
---Purpose: Creates a view mapping with the following default
-- values :
-- XCenter = 0.
-- YCenter = 0.
-- Size = 1.
---Category: Constructors
---------------------------------------------------
-- Category: Methods to modify the class definition
---------------------------------------------------
SetViewMapping (me: mutable;
aXCenter, aYCenter: Length from Quantity;
aSize: Length from Quantity)
is static;
---Level: Public
---Purpose: Sets new values for the view mapping <me>.
---Category: Methods to modify the class definition
SetCenter (me: mutable;
aXCenter, aYCenter: Length from Quantity)
is static;
---Level: Public
---Purpose: Sets new values for the view mapping center.
---Category: Methods to modify the class definition
SetSize (me: mutable;
aSize: Length from Quantity)
is static;
---Level: Public
---Purpose: Sets new value for the view mapping size.
SetViewMappingDefault (me: mutable)
is static;
---Level: Public
---Purpose: Saves the current mapping which will be the
-- reference value for the reset of the mapping
-- done by the ViewmappingReset method.
---Category: Methods to modify the class definition
ViewMappingReset (me: mutable)
is static;
---Level: Public
---Purpose: Sets the value of the mapping to be the same as
-- the mapping saved by the SetViewMappingDefault method.
---Category: Methods to modify the class definition
----------------------------
-- Category: Inquire methods
----------------------------
ViewMapping (me; XCenter, YCenter, Size: out Length from Quantity)
is static;
---Level: Public
---Purpose: Returns the current mapping of the view <me>.
---Category: Inquire methods
Center (me; XCenter, YCenter: out Length from Quantity)
is static;
---Level: Public
---Purpose: Returns the current center of the view <me>.
---Category: Inquire methods
ViewMappingDefault (me;
XCenter, YCenter, Size: out Length from Quantity)
is static;
---Level: Public
---Purpose: Returns the current reset mapping of the view <me>.
---Category: Inquire methods
Zoom (me)
returns Factor from Quantity
is static;
---Level: Public
---Purpose: Returns the zoom factor (CurrentSize/InitialSize).
---Category: Inquire methods
fields
myXCenter: Length from Quantity;
myYCenter: Length from Quantity;
mySize: Length from Quantity;
myInitialXCenter: Length from Quantity;
myInitialYCenter: Length from Quantity;
myInitialSize: Length from Quantity;
end ViewMapping from Graphic2d;
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