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-- File: Viewer_View.cdl
-- Created: Thu Mar 7 14:06:17 1996
-- Author: Jean-Louis Frenkel
-- <rmi@pernox>
---Copyright: Matra Datavision 1996
deferred class View from Viewer inherits TShared from MMgt
---Purpose: This class defines a view.
uses
Length from Quantity,Factor from Quantity
raises
BadValue from Viewer
is
Initialize;
Update(me)
---Purpose: Clears the window and redraws all primitives.
is deferred;
SetImmediateUpdate(me: mutable; onoff: Boolean from Standard)
---Purpose: sets the immediate update mode and returns the previous one.
returns Boolean from Standard;
ImmediateUpdate(me)
---Purpose:
is static protected;
WindowFit(me: mutable ; Xmin, Ymin, Xmax, Ymax : Integer)
---Purpose: Centres the defined pixel window defined by the
-- minimum and maximum pixels Xmin, Ymin, Xmax,
-- Ymax so that it occupies the largest possible space
-- while maintaining the initial height/width ratio.
-- Exceptions
-- Viewer_BadValue if the size of the defined
-- projection window is equal to 0.
raises BadValue from Viewer
is deferred;
Place (me:mutable; x,y: Integer from Standard;
aZoomFactor: Factor from Quantity = 1)
---Purpose: Sets the center of the object space defined by x, y
-- and the zoom factor aZoomFactor. The view is updated.
is deferred;
fields
myImmediateUpdate: Boolean from Standard is protected;
end View from Viewer;
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