GGSceneType.mesa
Copyright © 1986 by Xerox Corporation. All rights reserved.
Last edited by Bier on December 28, 1986 1:39:00 pm PST
Contents: The concrete Scene type (shared by GGScene and GGSelect).
DIRECTORY
GGModelTypes
;
GGSceneType: CEDAR DEFINITIONS = BEGIN
Slice: TYPE = GGModelTypes.Slice;
SliceDescriptor: TYPE = GGModelTypes.SliceDescriptor;
SceneObj: TYPE = RECORD [
ptrValid: BOOL ← FALSE, -- TRUE when ptr accurately points to end of entities
ptr: LIST OF Slice ← NIL, -- finger pointer to end of entities list
entities: LIST OF Slice ← NIL, -- a list of slices
oldEntities: LIST OF LIST OF Slice ← NIL, -- lists of slices. Used by Undelete.
selected: SelectedData,
savedSelected: SelectedData, -- needed to recover from Abort operations
prioritiesValid: BOOL -- TRUE if no top level entities have been added or deleted since priorities were last updated, Bier, March 10, 1987
];
SelectedData: TYPE = RECORD [
normal: LIST OF SliceDescriptor ← NIL, -- a list of selected SliceDescriptors
hot: LIST OF SliceDescriptor ← NIL, -- a list of hot SliceDescriptors
active: LIST OF SliceDescriptor ← NIL -- a list of active SliceDescriptors
];
END.