CDInterestRectsImpl.mesa
Copyright © 1984, 1985 by Xerox Corporation. All rights reserved.
Created by: Jacobi, September 13, 1984 3:21:36 pm PDT
Last Edited: Jacobi, May 29, 1985 10:44:06 am PDT
DIRECTORY
CD,
CDBasics,
CDInterestRects,
CDIO,
CDObjectProcs,
CDProperties,
TokenIO;
CDInterestRectsImpl:
CEDAR
PROGRAM
IMPORTS CDBasics, CDIO, CDObjectProcs, CDProperties, TokenIO
EXPORTS CDInterestRects =
BEGIN
-- InterestRect: A special rectangle associated to an object.
-- It defaults to the objects innerrect.
AdjustInterest:
PUBLIC
PROC [ob:
CD.Object] =
BEGIN
IF ob.class.inDirectory
AND
CDIO.VersionKey[]<8
THEN {
WITH CDProperties.GetPropFromObject[from: ob, prop: interestRectProperty]
SELECT
FROM
pp:
REF
CD.Rect =>
IF CDBasics.NonEmpty[pp^] THEN SetInterest[ob, pp^]
ENDCASE => NULL;
};
END;
InternalReadProperty:
PROC [prop:
ATOM]
RETURNS [val:
REF] =
BEGIN
x1: INT = TokenIO.ReadInt[];
y1: INT = TokenIO.ReadInt[];
x2: INT = TokenIO.ReadInt[];
y2: INT = TokenIO.ReadInt[];
val ← NEW[CD.Rect←[x1, y1, x2, y2]]
END;
SetInterest: CDInterestRects.SetInterestProc =
BEGIN
WITH CDObjectProcs.FetchFurther[ob.class, $SetInterestProc]
SELECT
FROM
class: REF CDInterestRects.SetInterestProc => class^[ob, r];
ENDCASE => NULL;
END;
InstallOldSetInterest:
PUBLIC
PROC [type:
REF
CD.ObjectClass, proc: CDInterestRects.SetInterestProc] =
BEGIN
CDObjectProcs.StoreFurther[type, $SetInterestProc, NEW[CDInterestRects.SetInterestProc←proc]];
END;
InternalReadOrigin:
PROC [prop:
ATOM]
RETURNS [val:
REF] =
BEGIN
x: INT = TokenIO.ReadInt[];
y: INT = TokenIO.ReadInt[];
val ← NIL
END;
originProperty: ATOM = $origin;
interestRectProperty: ATOM = $interestRect;
[] ← CDProperties.RegisterProperty[interestRectProperty];
CDProperties.InstallProcs[prop: interestRectProperty,
new: CDProperties.PropertyProcsRec[
makeCopy: CDProperties.DontCopy,
internalRead: InternalReadProperty,
exclusive: TRUE
]
];
[] ← CDProperties.RegisterProperty[originProperty];
CDProperties.InstallProcs[prop: originProperty,
new: CDProperties.PropertyProcsRec[
makeCopy: CDProperties.DontCopy,
internalRead: InternalReadOrigin,
exclusive: TRUE
]
];
CDObjectProcs.RegisterFurther[$SetInterestProc];
END.