559 lines
14 KiB
Plaintext
559 lines
14 KiB
Plaintext
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{*******************************************************}
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{ }
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{ Turbo Pascal Version 6.0 }
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{ Turbo Vision Unit }
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{ }
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{ Copyright (c) 1990 Borland International }
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{ }
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{*******************************************************}
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unit Views;
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{$F+,O+,S-,X+}
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interface
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uses Objects, Drivers, Memory;
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const
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{ TView State masks }
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sfVisible = $0001;
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sfCursorVis = $0002;
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sfCursorIns = $0004;
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sfShadow = $0008;
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sfActive = $0010;
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sfSelected = $0020;
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sfFocused = $0040;
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sfDragging = $0080;
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sfDisabled = $0100;
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sfModal = $0200;
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sfDefault = $0400;
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sfExposed = $0800;
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{ TView Option masks }
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ofSelectable = $0001;
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ofTopSelect = $0002;
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ofFirstClick = $0004;
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ofFramed = $0008;
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ofPreProcess = $0010;
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ofPostProcess = $0020;
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ofBuffered = $0040;
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ofTileable = $0080;
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ofCenterX = $0100;
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ofCenterY = $0200;
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ofCentered = $0300;
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{ TView GrowMode masks }
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gfGrowLoX = $01;
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gfGrowLoY = $02;
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gfGrowHiX = $04;
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gfGrowHiY = $08;
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gfGrowAll = $0F;
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gfGrowRel = $10;
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{ TView DragMode masks }
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dmDragMove = $01;
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dmDragGrow = $02;
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dmLimitLoX = $10;
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dmLimitLoY = $20;
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dmLimitHiX = $40;
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dmLimitHiY = $80;
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dmLimitAll = $F0;
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{ TView Help context codes }
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hcNoContext = 0;
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hcDragging = 1;
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{ TScrollBar part codes }
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sbLeftArrow = 0;
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sbRightArrow = 1;
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sbPageLeft = 2;
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sbPageRight = 3;
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sbUpArrow = 4;
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sbDownArrow = 5;
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sbPageUp = 6;
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sbPageDown = 7;
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sbIndicator = 8;
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{ TScrollBar options for TWindow.StandardScrollBar }
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sbHorizontal = $0000;
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sbVertical = $0001;
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sbHandleKeyboard = $0002;
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{ TWindow Flags masks }
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wfMove = $01;
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wfGrow = $02;
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wfClose = $04;
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wfZoom = $08;
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{ TWindow number constants }
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wnNoNumber = 0;
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{ TWindow palette entries }
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wpBlueWindow = 0;
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wpCyanWindow = 1;
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wpGrayWindow = 2;
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{ Standard command codes }
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cmValid = 0;
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cmQuit = 1;
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cmError = 2;
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cmMenu = 3;
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cmClose = 4;
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cmZoom = 5;
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cmResize = 6;
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cmNext = 7;
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cmPrev = 8;
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cmHelp = 9;
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{ Application command codes }
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cmCut = 20;
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cmCopy = 21;
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cmPaste = 22;
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cmUndo = 23;
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cmClear = 24;
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cmTile = 25;
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cmCascade = 26;
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{ TDialog standard commands }
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cmOK = 10;
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cmCancel = 11;
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cmYes = 12;
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cmNo = 13;
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cmDefault = 14;
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{ Standard messages }
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cmReceivedFocus = 50;
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cmReleasedFocus = 51;
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cmCommandSetChanged = 52;
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{ TScrollBar messages }
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cmScrollBarChanged = 53;
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cmScrollBarClicked = 54;
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{ TWindow select messages }
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cmSelectWindowNum = 55;
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{ TListViewer messages }
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cmListItemSelected = 56;
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{ Color palettes }
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CFrame = #1#1#2#2#3;
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CScrollBar = #4#5#5;
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CScroller = #6#7;
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CListViewer = #26#26#27#28#29;
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CBlueWindow = #8#9#10#11#12#13#14#15;
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CCyanWindow = #16#17#18#19#20#21#22#23;
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CGrayWindow = #24#25#26#27#28#29#30#31;
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{ TDrawBuffer maximum view width }
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MaxViewWidth = 132;
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type
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{ Command sets }
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PCommandSet = ^TCommandSet;
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TCommandSet = set of Byte;
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{ Color palette type }
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PPalette = ^TPalette;
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TPalette = String;
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{ TDrawBuffer, buffer used by draw methods }
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TDrawBuffer = array[0..MaxViewWidth - 1] of Word;
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{ TView object Pointer }
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PView = ^TView;
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{ TGroup object Pointer }
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PGroup = ^TGroup;
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{ TView object }
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TView = object(TObject)
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Owner: PGroup;
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Next: PView;
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Origin: TPoint;
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Size: TPoint;
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Cursor: TPoint;
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GrowMode: Byte;
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DragMode: Byte;
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HelpCtx: Word;
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State: Word;
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Options: Word;
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EventMask: Word;
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constructor Init(var Bounds: TRect);
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constructor Load(var S: TStream);
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destructor Done; virtual;
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procedure BlockCursor;
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procedure CalcBounds(var Bounds: TRect; Delta: TPoint); virtual;
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procedure ChangeBounds(var Bounds: TRect); virtual;
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procedure ClearEvent(var Event: TEvent);
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function CommandEnabled(Command: Word): Boolean;
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function DataSize: Word; virtual;
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procedure DisableCommands(Commands: TCommandSet);
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procedure DragView(Event: TEvent; Mode: Byte;
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var Limits: TRect; MinSize, MaxSize: TPoint);
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procedure Draw; virtual;
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procedure DrawView;
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procedure EnableCommands(Commands: TCommandSet);
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procedure EndModal(Command: Word); virtual;
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function EventAvail: Boolean;
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function Execute: Word; virtual;
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function Exposed: Boolean;
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procedure GetBounds(var Bounds: TRect);
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procedure GetClipRect(var Clip: TRect);
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function GetColor(Color: Word): Word;
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procedure GetCommands(var Commands: TCommandSet);
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procedure GetData(var Rec); virtual;
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procedure GetEvent(var Event: TEvent); virtual;
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procedure GetExtent(var Extent: TRect);
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function GetHelpCtx: Word; virtual;
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function GetPalette: PPalette; virtual;
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procedure GetPeerViewPtr(var S: TStream; var P);
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function GetState(AState: Word): Boolean;
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procedure GrowTo(X, Y: Integer);
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procedure HandleEvent(var Event: TEvent); virtual;
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procedure Hide;
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procedure HideCursor;
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procedure KeyEvent(var Event: TEvent);
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procedure Locate(var Bounds: TRect);
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procedure MakeFirst;
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procedure MakeGlobal(Source: TPoint; var Dest: TPoint);
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procedure MakeLocal(Source: TPoint; var Dest: TPoint);
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function MouseEvent(var Event: TEvent; Mask: Word): Boolean;
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function MouseInView(Mouse: TPoint): Boolean;
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procedure MoveTo(X, Y: Integer);
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function NextView: PView;
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procedure NormalCursor;
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function Prev: PView;
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function PrevView: PView;
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procedure PutEvent(var Event: TEvent); virtual;
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procedure PutInFrontOf(Target: PView);
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procedure PutPeerViewPtr(var S: TStream; P: PView);
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procedure Select;
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procedure SetBounds(var Bounds: TRect);
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procedure SetCommands(Commands: TCommandSet);
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procedure SetCursor(X, Y: Integer);
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procedure SetData(var Rec); virtual;
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procedure SetState(AState: Word; Enable: Boolean); virtual;
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procedure Show;
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procedure ShowCursor;
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procedure SizeLimits(var Min, Max: TPoint); virtual;
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procedure Store(var S: TStream);
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function TopView: PView;
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function Valid(Command: Word): Boolean; virtual;
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procedure WriteBuf(X, Y, W, H: Integer; var Buf);
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procedure WriteChar(X, Y: Integer; C: Char; Color: Byte;
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Count: Integer);
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procedure WriteLine(X, Y, W, H: Integer; var Buf);
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procedure WriteStr(X, Y: Integer; Str: String; Color: Byte);
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end;
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{ TFrame types }
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TTitleStr = string[80];
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{ TFrame object }
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{ Palette layout }
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{ 1 = Passive frame }
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{ 2 = Passive title }
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{ 3 = Active frame }
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{ 4 = Active title }
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{ 5 = Icons }
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PFrame = ^TFrame;
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TFrame = object(TView)
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constructor Init(var Bounds: TRect);
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procedure Draw; virtual;
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function GetPalette: PPalette; virtual;
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procedure HandleEvent(var Event: TEvent); virtual;
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procedure SetState(AState: Word; Enable: Boolean); virtual;
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end;
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{ ScrollBar characters }
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TScrollChars = array[0..4] of Char;
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{ TScrollBar object }
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{ Palette layout }
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{ 1 = Page areas }
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{ 2 = Arrows }
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{ 3 = Indicator }
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PScrollBar = ^TScrollBar;
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TScrollBar = object(TView)
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Value: Integer;
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Min: Integer;
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Max: Integer;
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PgStep: Integer;
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ArStep: Integer;
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constructor Init(var Bounds: TRect);
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constructor Load(var S: TStream);
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procedure Draw; virtual;
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function GetPalette: PPalette; virtual;
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procedure HandleEvent(var Event: TEvent); virtual;
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procedure ScrollDraw; virtual;
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function ScrollStep(Part: Integer): Integer; virtual;
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procedure SetParams(AValue, AMin, AMax, APgStep, AArStep: Integer);
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procedure SetRange(AMin, AMax: Integer);
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procedure SetStep(APgStep, AArStep: Integer);
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procedure SetValue(AValue: Integer);
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procedure Store(var S: TStream);
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end;
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{ TScroller object }
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{ Palette layout }
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{ 1 = Normal text }
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{ 2 = Selected text }
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PScroller = ^TScroller;
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TScroller = object(TView)
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HScrollBar: PScrollBar;
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VScrollBar: PScrollBar;
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Delta: TPoint;
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Limit: TPoint;
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constructor Init(var Bounds: TRect; AHScrollBar, AVScrollBar: PScrollBar);
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constructor Load(var S: TStream);
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procedure ChangeBounds(var Bounds: TRect); virtual;
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function GetPalette: PPalette; virtual;
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procedure HandleEvent(var Event: TEvent); virtual;
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procedure ScrollDraw; virtual;
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procedure ScrollTo(X, Y: Integer);
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procedure SetLimit(X, Y: Integer);
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procedure SetState(AState: Word; Enable: Boolean); virtual;
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procedure Store(var S: TStream);
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end;
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{ TListViewer }
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{ Palette layout }
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{ 1 = Active }
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{ 2 = Inactive }
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{ 3 = Focused }
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{ 4 = Selected }
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{ 5 = Divider }
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PListViewer = ^TListViewer;
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TListViewer = object(TView)
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HScrollBar: PScrollBar;
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VScrollBar: PScrollBar;
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NumCols: Integer;
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TopItem: Integer;
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Focused: Integer;
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Range: Integer;
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constructor Init(var Bounds: TRect; ANumCols: Word;
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AHScrollBar, AVScrollBar: PScrollBar);
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constructor Load(var S: TStream);
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procedure ChangeBounds(var Bounds: TRect); virtual;
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procedure Draw; virtual;
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procedure FocusItem(Item: Integer); virtual;
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function GetPalette: PPalette; virtual;
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function GetText(Item: Integer; MaxLen: Integer): String; virtual;
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function IsSelected(Item: Integer): Boolean; virtual;
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procedure HandleEvent(var Event: TEvent); virtual;
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procedure SelectItem(Item: Integer); virtual;
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procedure SetRange(ARange: Integer);
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procedure SetState(AState: Word; Enable: Boolean); virtual;
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procedure Store(var S: TStream);
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end;
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{ Video buffer }
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PVideoBuf = ^TVideoBuf;
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TVideoBuf = array[0..3999] of Word;
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{ Selection modes }
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SelectMode = (NormalSelect, EnterSelect, LeaveSelect);
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{ TGroup object }
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TGroup = object(TView)
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Last: PView;
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Current: PView;
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Phase: (phFocused, phPreProcess, phPostProcess);
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Buffer: PVideoBuf;
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constructor Init(var Bounds: TRect);
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constructor Load(var S: TStream);
|
||
|
|
destructor Done; virtual;
|
||
|
|
procedure ChangeBounds(var Bounds: TRect); virtual;
|
||
|
|
function DataSize: Word; virtual;
|
||
|
|
procedure Delete(P: PView);
|
||
|
|
procedure Draw; virtual;
|
||
|
|
procedure EndModal(Command: Word); virtual;
|
||
|
|
procedure EventError(var Event: TEvent); virtual;
|
||
|
|
function ExecView(P: PView): Word;
|
||
|
|
function Execute: Word; virtual;
|
||
|
|
function First: PView;
|
||
|
|
function FirstThat(P: Pointer): PView;
|
||
|
|
procedure ForEach(P: Pointer);
|
||
|
|
procedure GetData(var Rec); virtual;
|
||
|
|
function GetHelpCtx: Word; virtual;
|
||
|
|
procedure GetSubViewPtr(var S: TStream; var P);
|
||
|
|
procedure HandleEvent(var Event: TEvent); virtual;
|
||
|
|
procedure Insert(P: PView);
|
||
|
|
procedure InsertBefore(P, Target: PView);
|
||
|
|
procedure Lock;
|
||
|
|
procedure PutSubViewPtr(var S: TStream; P: PView);
|
||
|
|
procedure Redraw;
|
||
|
|
procedure SelectNext(Forwards: Boolean);
|
||
|
|
procedure SetData(var Rec); virtual;
|
||
|
|
procedure SetState(AState: Word; Enable: Boolean); virtual;
|
||
|
|
procedure Store(var S: TStream);
|
||
|
|
procedure Unlock;
|
||
|
|
function Valid(Command: Word): Boolean; virtual;
|
||
|
|
end;
|
||
|
|
|
||
|
|
{ TWindow object }
|
||
|
|
|
||
|
|
{ Palette layout }
|
||
|
|
{ 1 = Frame passive }
|
||
|
|
{ 2 = Frame active }
|
||
|
|
{ 3 = Frame icon }
|
||
|
|
{ 4 = ScrollBar page area }
|
||
|
|
{ 5 = ScrollBar controls }
|
||
|
|
{ 6 = Scroller normal text }
|
||
|
|
{ 7 = Scroller selected text }
|
||
|
|
{ 8 = Reserved }
|
||
|
|
|
||
|
|
PWindow = ^TWindow;
|
||
|
|
TWindow = object(TGroup)
|
||
|
|
Flags: Byte;
|
||
|
|
ZoomRect: TRect;
|
||
|
|
Number: Integer;
|
||
|
|
Palette: Integer;
|
||
|
|
Frame: PFrame;
|
||
|
|
Title: PString;
|
||
|
|
constructor Init(var Bounds: TRect; ATitle: TTitleStr; ANumber: Integer);
|
||
|
|
constructor Load(var S: TStream);
|
||
|
|
destructor Done; virtual;
|
||
|
|
procedure Close; virtual;
|
||
|
|
function GetPalette: PPalette; virtual;
|
||
|
|
function GetTitle(MaxSize: Integer): TTitleStr; virtual;
|
||
|
|
procedure HandleEvent(var Event: TEvent); virtual;
|
||
|
|
procedure InitFrame; virtual;
|
||
|
|
procedure SetState(AState: Word; Enable: Boolean); virtual;
|
||
|
|
procedure SizeLimits(var Min, Max: TPoint); virtual;
|
||
|
|
function StandardScrollBar(AOptions: Word): PScrollBar;
|
||
|
|
procedure Store(var S: TStream);
|
||
|
|
procedure Zoom; virtual;
|
||
|
|
end;
|
||
|
|
|
||
|
|
{ Message dispatch function }
|
||
|
|
|
||
|
|
function Message(Receiver: PView; What, Command: Word;
|
||
|
|
InfoPtr: Pointer): Pointer;
|
||
|
|
|
||
|
|
{ Views registration procedure }
|
||
|
|
|
||
|
|
procedure RegisterViews;
|
||
|
|
|
||
|
|
const
|
||
|
|
|
||
|
|
{ Event masks }
|
||
|
|
|
||
|
|
PositionalEvents: Word = evMouse;
|
||
|
|
FocusedEvents: Word = evKeyboard + evCommand;
|
||
|
|
|
||
|
|
{ Minimum window size }
|
||
|
|
|
||
|
|
MinWinSize: TPoint = (X: 16; Y: 6);
|
||
|
|
|
||
|
|
{ Shadow definitions }
|
||
|
|
|
||
|
|
ShadowSize: TPoint = (X: 2; Y: 1);
|
||
|
|
ShadowAttr: Byte = $08;
|
||
|
|
|
||
|
|
{ Markers control }
|
||
|
|
|
||
|
|
ShowMarkers: Boolean = False;
|
||
|
|
|
||
|
|
{ MapColor error return value }
|
||
|
|
|
||
|
|
ErrorAttr: Byte = $CF;
|
||
|
|
|
||
|
|
{ Stream Registration Records }
|
||
|
|
|
||
|
|
RView: TStreamRec = (
|
||
|
|
ObjType: 1;
|
||
|
|
VmtLink: Ofs(TypeOf(TView)^);
|
||
|
|
Load: @TView.Load;
|
||
|
|
Store: @TView.Store
|
||
|
|
);
|
||
|
|
RFrame: TStreamRec = (
|
||
|
|
ObjType: 2;
|
||
|
|
VmtLink: Ofs(TypeOf(TFrame)^);
|
||
|
|
Load: @TFrame.Load;
|
||
|
|
Store: @TFrame.Store
|
||
|
|
);
|
||
|
|
RScrollBar: TStreamRec = (
|
||
|
|
ObjType: 3;
|
||
|
|
VmtLink: Ofs(TypeOf(TScrollBar)^);
|
||
|
|
Load: @TScrollBar.Load;
|
||
|
|
Store: @TScrollBar.Store
|
||
|
|
);
|
||
|
|
RScroller: TStreamRec = (
|
||
|
|
ObjType: 4;
|
||
|
|
VmtLink: Ofs(TypeOf(TScroller)^);
|
||
|
|
Load: @TScroller.Load;
|
||
|
|
Store: @TScroller.Store
|
||
|
|
);
|
||
|
|
RListViewer: TStreamRec = (
|
||
|
|
ObjType: 5;
|
||
|
|
VmtLink: Ofs(TypeOf(TListViewer)^);
|
||
|
|
Load: @TListViewer.Load;
|
||
|
|
Store: @TLIstViewer.Store
|
||
|
|
);
|
||
|
|
RGroup: TStreamRec = (
|
||
|
|
ObjType: 6;
|
||
|
|
VmtLink: Ofs(TypeOf(TGroup)^);
|
||
|
|
Load: @TGroup.Load;
|
||
|
|
Store: @TGroup.Store
|
||
|
|
);
|
||
|
|
RWindow: TStreamRec = (
|
||
|
|
ObjType: 7;
|
||
|
|
VmtLink: Ofs(TypeOf(TWindow)^);
|
||
|
|
Load: @TWindow.Load;
|
||
|
|
Store: @TWindow.Store
|
||
|
|
);
|
||
|
|
|
||
|
|
{ Characters used for drawing selected and default items in }
|
||
|
|
{ monochrome color sets }
|
||
|
|
|
||
|
|
SpecialChars: array[0..5] of Char = (#175, #174, #26, #27, ' ', ' ');
|
||
|
|
|
||
|
|
{ True if the command set has changed since being set to false }
|
||
|
|
|
||
|
|
CommandSetChanged: Boolean = False;
|