(* Copyright (C) 1992, Digital Equipment Corporation                         *)
(* All rights reserved.                                                      *)
(* See the file COPYRIGHT for a full description.                            *)

(* Last modified on Mon Feb 10 17:52:24 PST 1992 by muller                   *)
(*      modified on Mon Feb 10 16:54:50 PST 1992 by ayers                    *)



INTERFACE OneSlideDLE;

IMPORT DisplayList, DisplayListStack, DPS, DPSWindow, 
 Linked2Tree, PopupMenuDLE, Rd, Text;

TYPE T = DisplayList.T OBJECT 
  initialized: BOOLEAN := FALSE;
  window: DPS.T := NIL;
  canMouseChildren: BOOLEAN := FALSE;
  backgroundPopup: PopupMenuDLE.T;
  minimumHeight, maximumHeight: REAL := 0.0;
  fixed: DisplayList.T := NIL;
  visible: DisplayListStack.T := NIL;
  invisible: Linked2Tree.T := NIL;
 METHODS
  AppendFixed (e: Linked2Tree.E) := AppendFixed;
  AppendVariable (e: Linked2Tree.E) := AppendVariable;
  AllInvisible () := AllInvisible;
  NextVisible () := NextVisible;
 OVERRIDES
  Prepend := Prepend;
  Append := Append;
  InsertBefore := InsertBefore;
  InsertAfter := InsertAfter;
  MakeChildLast := MakeChildLast;
  MakeChildFirst := MakeChildFirst;
  Mouse := Mouse;
  Char := Char;
  Repaint := Repaint;
  ImmediatePostScript := PostScriptToParentClipped;
  Dirty := DirtyToParentClipped;
  END;
TYPE E = T;
TYPE R = T;

PROCEDURE Init (t: T; window: DPSWindow.T; content: Rd.T := NIL);

PROCEDURE Prepend (t: T; e: Linked2Tree.E);
PROCEDURE Append (t: T; e: Linked2Tree.E);
PROCEDURE InsertBefore (t: T; e, before: Linked2Tree.E);
PROCEDURE InsertAfter (t: T; e, after: Linked2Tree.E);

PROCEDURE MakeChildLast (t: T; e: Linked2Tree.E): Linked2Tree.E;
PROCEDURE MakeChildFirst (t: T; e: Linked2Tree.E): Linked2Tree.E;

PROCEDURE Mouse (e: E; t: DPSWindow.T; event: DPS.MouseEvent): BOOLEAN;
PROCEDURE Char (e: E; t: DPSWindow.T; char: CHAR): BOOLEAN;

PROCEDURE Repaint (t: T; box: DPS.Box; only: REFANY): Text.T;

PROCEDURE PostScriptToParentClipped (e: E; script: Text.T);
PROCEDURE DirtyToParentClipped (e: E; box: DPS.Box; only: DisplayList.T := NIL);
 
PROCEDURE AppendFixed (t: T; e: Linked2Tree.E);
PROCEDURE AppendVariable (t: T; e: Linked2Tree.E); (* = Append *)
  
PROCEDURE AllInvisible (t: T); 
PROCEDURE NextVisible (t: T);
  
  END OneSlideDLE.