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