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views.pas
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{********[ SOURCE FILE OF GRAPHICAL FREE VISION ]**********}
{ }
{ System independent GRAPHICAL clone of VIEWS.PAS }
{ }
{ Interface Copyright (c) 1992 Borland International }
{ }
{ Copyright (c) 1996, 1997, 1998, 1999 by Leon de Boer }
{ ldeboer@attglobal.net - primary e-mail address }
{ ldeboer@starwon.com.au - backup e-mail address }
{ }
{****************[ THIS CODE IS FREEWARE ]*****************}
{ }
{ This sourcecode is released for the purpose to }
{ promote the pascal language on all platforms. You may }
{ redistribute it and/or modify with the following }
{ DISCLAIMER. }
{ }
{ This SOURCE CODE is distributed "AS IS" WITHOUT }
{ WARRANTIES AS TO PERFORMANCE OF MERCHANTABILITY OR }
{ ANY OTHER WARRANTIES WHETHER EXPRESSED OR IMPLIED. }
{ }
{*****************[ SUPPORTED PLATFORMS ]******************}
{ }
{ Only Free Pascal Compiler supported }
{ }
{**********************************************************}
UNIT Views;
{$CODEPAGE cp437}
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
INTERFACE
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
{====Include file to sort compiler platform out =====================}
{$I platform.inc}
{====================================================================}
{==== Compiler directives ===========================================}
{$X+} { Extended syntax is ok }
{$R-} { Disable range checking }
{$S-} { Disable Stack Checking }
{$I-} { Disable IO Checking }
{$Q-} { Disable Overflow Checking }
{$V-} { Turn off strict VAR strings }
{====================================================================}
USES
{$IFDEF OS_WINDOWS} { WIN/NT CODE }
Windows, { Standard unit }
{$ENDIF}
{$IFDEF OS_OS2} { OS2 CODE }
Os2Def, DosCalls, PmWin,
{$ENDIF}
Objects, FVCommon, Drivers, fvconsts; { GFV standard units }
{***************************************************************************}
{ PUBLIC CONSTANTS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TView STATE MASKS }
{---------------------------------------------------------------------------}
CONST
sfVisible = $0001; { View visible mask }
sfCursorVis = $0002; { Cursor visible }
sfCursorIns = $0004; { Cursor insert mode }
sfShadow = $0008; { View has shadow }
sfActive = $0010; { View is active }
sfSelected = $0020; { View is selected }
sfFocused = $0040; { View is focused }
sfDragging = $0080; { View is dragging }
sfDisabled = $0100; { View is disabled }
sfModal = $0200; { View is modal }
sfDefault = $0400; { View is default }
sfExposed = $0800; { View is exposed }
sfIconised = $1000; { View is iconised }
{---------------------------------------------------------------------------}
{ TView OPTION MASKS }
{---------------------------------------------------------------------------}
CONST
ofSelectable = $0001; { View selectable }
ofTopSelect = $0002; { Top selectable }
ofFirstClick = $0004; { First click react }
ofFramed = $0008; { View is framed }
ofPreProcess = $0010; { Pre processes }
ofPostProcess = $0020; { Post processes }
ofBuffered = $0040; { View is buffered }
ofTileable = $0080; { View is tileable }
ofCenterX = $0100; { View centred on x }
ofCenterY = $0200; { View centred on y }
ofCentered = $0300; { View x,y centred }
ofValidate = $0400; { View validates }
ofVersion = $3000; { View TV version }
ofVersion10 = $0000; { TV version 1 view }
ofVersion20 = $1000; { TV version 2 view }
{---------------------------------------------------------------------------}
{ TView GROW MODE MASKS }
{---------------------------------------------------------------------------}
CONST
gfGrowLoX = $01; { Left side grow }
gfGrowLoY = $02; { Top side grow }
gfGrowHiX = $04; { Right side grow }
gfGrowHiY = $08; { Bottom side grow }
gfGrowAll = $0F; { Grow on all sides }
gfGrowRel = $10; { Grow relative }
{---------------------------------------------------------------------------}
{ TView DRAG MODE MASKS }
{---------------------------------------------------------------------------}
CONST
dmDragMove = $01; { Move view }
dmDragGrow = $02; { Grow view }
dmLimitLoX = $10; { Limit left side }
dmLimitLoY = $20; { Limit top side }
dmLimitHiX = $40; { Limit right side }
dmLimitHiY = $80; { Limit bottom side }
dmLimitAll = $F0; { Limit all sides }
{---------------------------------------------------------------------------}
{ >> NEW << TAB OPTION MASKS }
{---------------------------------------------------------------------------}
CONST
tmTab = $01; { Tab move mask }
tmShiftTab = $02; { Shift+tab move mask }
tmEnter = $04; { Enter move mask }
tmLeft = $08; { Left arrow move mask }
tmRight = $10; { Right arrow move mask }
tmUp = $20; { Up arrow move mask }
tmDown = $40; { Down arrow move mask }
{---------------------------------------------------------------------------}
{ >> NEW << VIEW DRAW MASKS }
{---------------------------------------------------------------------------}
CONST
vdBackGnd = $01; { Draw backgound }
vdInner = $02; { Draw inner detail }
vdCursor = $04; { Draw cursor }
vdBorder = $08; { Draw view border }
vdFocus = $10; { Draw focus state }
vdNoChild = $20; { Draw no children }
vdShadow = $40;
vdAll = vdBackGnd + vdInner + vdCursor + vdBorder + vdFocus + vdShadow;
{---------------------------------------------------------------------------}
{ TView HELP CONTEXTS }
{---------------------------------------------------------------------------}
CONST
hcNoContext = 0; { No view context }
hcDragging = 1; { No drag context }
{---------------------------------------------------------------------------}
{ TWindow FLAG MASKS }
{---------------------------------------------------------------------------}
CONST
wfMove = $01; { Window can move }
wfGrow = $02; { Window can grow }
wfClose = $04; { Window can close }
wfZoom = $08; { Window can zoom }
{---------------------------------------------------------------------------}
{ TWindow PALETTES }
{---------------------------------------------------------------------------}
CONST
wpBlueWindow = 0; { Blue palette }
wpCyanWindow = 1; { Cyan palette }
wpGrayWindow = 2; { Gray palette }
{---------------------------------------------------------------------------}
{ COLOUR PALETTES }
{---------------------------------------------------------------------------}
CONST
CFrame = #1#1#2#2#3; { Frame palette }
CScrollBar = #4#5#5; { Scrollbar palette }
CScroller = #6#7; { Scroller palette }
CListViewer = #26#26#27#28#29; { Listviewer palette }
CBlueWindow = #8#9#10#11#12#13#14#15; { Blue window palette }
CCyanWindow = #16#17#18#19#20#21#22#23; { Cyan window palette }
CGrayWindow = #24#25#26#27#28#29#30#31; { Grey window palette }
{---------------------------------------------------------------------------}
{ TScrollBar PART CODES }
{---------------------------------------------------------------------------}
CONST
sbLeftArrow = 0; { Left arrow part }
sbRightArrow = 1; { Right arrow part }
sbPageLeft = 2; { Page left part }
sbPageRight = 3; { Page right part }
sbUpArrow = 4; { Up arrow part }
sbDownArrow = 5; { Down arrow part }
sbPageUp = 6; { Page up part }
sbPageDown = 7; { Page down part }
sbIndicator = 8; { Indicator part }
{---------------------------------------------------------------------------}
{ TScrollBar OPTIONS FOR TWindow.StandardScrollBar }
{---------------------------------------------------------------------------}
CONST
sbHorizontal = $0000; { Horz scrollbar }
sbVertical = $0001; { Vert scrollbar }
sbHandleKeyboard = $0002; { Handle keyboard }
{---------------------------------------------------------------------------}
{ STANDARD COMMAND CODES }
{---------------------------------------------------------------------------}
CONST
cmValid = 0; { Valid command }
cmQuit = 1; { Quit command }
cmError = 2; { Error command }
cmMenu = 3; { Menu command }
cmClose = 4; { Close command }
cmZoom = 5; { Zoom command }
cmResize = 6; { Resize command }
cmNext = 7; { Next view command }
cmPrev = 8; { Prev view command }
cmHelp = 9; { Help command }
cmOK = 10; { Okay command }
cmCancel = 11; { Cancel command }
cmYes = 12; { Yes command }
cmNo = 13; { No command }
cmDefault = 14; { Default command }
cmCut = 20; { Clipboard cut cmd }
cmCopy = 21; { Clipboard copy cmd }
cmPaste = 22; { Clipboard paste cmd }
cmUndo = 23; { Clipboard undo cmd }
cmClear = 24; { Clipboard clear cmd }
cmTile = 25; { Tile subviews cmd }
cmCascade = 26; { Cascade subviews cmd }
cmReceivedFocus = 50; { Received focus }
cmReleasedFocus = 51; { Released focus }
cmCommandSetChanged = 52; { Commands changed }
cmScrollBarChanged = 53; { Scrollbar changed }
cmScrollBarClicked = 54; { Scrollbar clicked on }
cmSelectWindowNum = 55; { Select window }
cmListItemSelected = 56; { Listview item select }
cmNotify = 27;
cmIdCommunicate = 28; { Communicate via id }
cmIdSelect = 29; { Select via id }
{---------------------------------------------------------------------------}
{ TWindow NUMBER CONSTANTS }
{---------------------------------------------------------------------------}
CONST
wnNoNumber = 0; { Window has no num }
MaxViewWidth = 255; { Max view width }
{***************************************************************************}
{ PUBLIC TYPE DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TWindow Title string }
{---------------------------------------------------------------------------}
TYPE
TTitleStr = String[80]; { Window title string }
{---------------------------------------------------------------------------}
{ COMMAND SET RECORD }
{---------------------------------------------------------------------------}
TYPE
TCommandSet = SET OF Byte; { Command set record }
PCommandSet = ^TCommandSet; { Ptr to command set }
{---------------------------------------------------------------------------}
{ PALETTE RECORD }
{---------------------------------------------------------------------------}
TYPE
TPalette = String; { Palette record }
PPalette = ^TPalette; { Pointer to palette }
{---------------------------------------------------------------------------}
{ TDrawBuffer RECORD }
{---------------------------------------------------------------------------}
TYPE
TDrawBuffer = Array [0..MaxViewWidth - 1] Of Word; { Draw buffer record }
PDrawBuffer = ^TDrawBuffer; { Ptr to draw buffer }
{---------------------------------------------------------------------------}
{ TVideoBuffer RECORD }
{---------------------------------------------------------------------------}
TYPE
TVideoBuf = ARRAY [0..3999] of Word; { Video buffer }
PVideoBuf = ^TVideoBuf; { Pointer to buffer }
{---------------------------------------------------------------------------}
{ TComplexArea RECORD }
{---------------------------------------------------------------------------}
TYPE
PComplexArea = ^TComplexArea; { Complex area }
TComplexArea =
{$ifndef FPC_REQUIRES_PROPER_ALIGNMENT}
PACKED
{$endif FPC_REQUIRES_PROPER_ALIGNMENT}
RECORD
X1, Y1 : Sw_Integer; { Top left corner }
X2, Y2 : Sw_Integer; { Lower right corner }
NextArea: PComplexArea; { Next area pointer }
END;
{***************************************************************************}
{ PUBLIC OBJECT DEFINITIONS }
{***************************************************************************}
TYPE
PGroup = ^TGroup; { Pointer to group }
{---------------------------------------------------------------------------}
{ TView OBJECT - ANCESTOR VIEW OBJECT }
{---------------------------------------------------------------------------}
PView = ^TView;
TView = OBJECT (TObject)
GrowMode : Byte; { View grow mode }
DragMode : Byte; { View drag mode }
TabMask : Byte; { Tab move masks }
ColourOfs: Sw_Integer; { View palette offset }
HelpCtx : Word; { View help context }
State : Word; { View state masks }
Options : Word; { View options masks }
EventMask: Word; { View event masks }
Origin : TPoint; { View origin }
Size : TPoint; { View size }
Cursor : TPoint; { Cursor position }
Next : PView; { Next peerview }
Owner : PGroup; { Owner group }
HoldLimit: PComplexArea; { Hold limit values }
RevCol : Boolean;
BackgroundChar : Char;
CONSTRUCTOR Init (Var Bounds: TRect);
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION Prev: PView;
FUNCTION Execute: Word; Virtual;
FUNCTION Focus: Boolean;
FUNCTION DataSize: Sw_Word; Virtual;
FUNCTION TopView: PView;
FUNCTION PrevView: PView;
FUNCTION NextView: PView;
FUNCTION GetHelpCtx: Word; Virtual;
FUNCTION EventAvail: Boolean;
FUNCTION GetPalette: PPalette; Virtual;
function MapColor (color:byte):byte;
FUNCTION GetColor (Color: Word): Word;
FUNCTION Valid (Command: Word): Boolean; Virtual;
FUNCTION GetState (AState: Word): Boolean;
FUNCTION TextWidth (const Txt: String): Sw_Integer;
FUNCTION CTextWidth (const Txt: String): Sw_Integer;
FUNCTION MouseInView (Point: TPoint): Boolean;
FUNCTION CommandEnabled (Command: Word): Boolean;
FUNCTION OverLapsArea (X1, Y1, X2, Y2: Sw_Integer): Boolean;
FUNCTION MouseEvent (Var Event: TEvent; Mask: Word): Boolean;
PROCEDURE Hide;
PROCEDURE Show;
PROCEDURE Draw; Virtual;
PROCEDURE ResetCursor; Virtual;
PROCEDURE Select;
PROCEDURE Awaken; Virtual;
PROCEDURE DrawView;
PROCEDURE MakeFirst;
PROCEDURE DrawCursor; Virtual;
PROCEDURE HideCursor;
PROCEDURE ShowCursor;
PROCEDURE BlockCursor;
PROCEDURE NormalCursor;
PROCEDURE FocusFromTop; Virtual;
PROCEDURE MoveTo (X, Y: Sw_Integer);
PROCEDURE GrowTo (X, Y: Sw_Integer);
PROCEDURE EndModal (Command: Word); Virtual;
PROCEDURE SetCursor (X, Y: Sw_Integer);
PROCEDURE PutInFrontOf (Target: PView);
PROCEDURE SetCommands (Commands: TCommandSet);
PROCEDURE EnableCommands (Commands: TCommandSet);
PROCEDURE DisableCommands (Commands: TCommandSet);
PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
PROCEDURE SetCmdState (Commands: TCommandSet; Enable: Boolean);
PROCEDURE GetData (Var Rec); Virtual;
PROCEDURE SetData (Var Rec); Virtual;
PROCEDURE Store (Var S: TStream);
PROCEDURE Locate (Var Bounds: TRect);
PROCEDURE KeyEvent (Var Event: TEvent);
PROCEDURE GetEvent (Var Event: TEvent); Virtual;
PROCEDURE PutEvent (Var Event: TEvent); Virtual;
PROCEDURE GetExtent (Var Extent: TRect);
PROCEDURE GetBounds (Var Bounds: TRect);
PROCEDURE SetBounds (Var Bounds: TRect);
PROCEDURE GetClipRect (Var Clip: TRect);
PROCEDURE ClearEvent (Var Event: TEvent);
PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
PROCEDURE SizeLimits (Var Min, Max: TPoint); Virtual;
PROCEDURE GetCommands (Var Commands: TCommandSet);
PROCEDURE GetPeerViewPtr (Var S: TStream; Var P);
PROCEDURE PutPeerViewPtr (Var S: TStream; P: PView);
PROCEDURE CalcBounds (Var Bounds: TRect; Delta: TPoint); Virtual;
FUNCTION Exposed: Boolean; { This needs help!!!!! }
PROCEDURE WriteBuf (X, Y, W, H: Sw_Integer; Var Buf);
PROCEDURE WriteLine (X, Y, W, H: Sw_Integer; Var Buf);
PROCEDURE MakeLocal (Source: TPoint; Var Dest: TPoint);
PROCEDURE MakeGlobal (Source: TPoint; Var Dest: TPoint);
PROCEDURE WriteStr (X, Y: Sw_Integer; Str: String; Color: Byte);
PROCEDURE WriteChar (X, Y: Sw_Integer; C: Char; Color: Byte;
Count: Sw_Integer);
PROCEDURE DragView (Event: TEvent; Mode: Byte; Var Limits: TRect;
MinSize, MaxSize: TPoint);
private
procedure CursorChanged;
procedure DrawHide(LastView: PView);
procedure DrawShow(LastView: PView);
procedure DrawUnderRect(var R: TRect; LastView: PView);
procedure DrawUnderView(DoShadow: Boolean; LastView: PView);
procedure do_WriteView(x1,x2,y:Sw_Integer; var Buf);
procedure do_WriteViewRec1(x1,x2:Sw_integer; p:PView; shadowCounter:Sw_integer);
procedure do_WriteViewRec2(x1,x2:Sw_integer; p:PView; shadowCounter:Sw_integer);
function do_ExposedRec1(x1,x2:Sw_integer; p:PView):boolean;
function do_ExposedRec2(x1,x2:Sw_integer; p:PView):boolean;
END;
SelectMode = (NormalSelect, EnterSelect, LeaveSelect);
{---------------------------------------------------------------------------}
{ TGroup OBJECT - GROUP OBJECT ANCESTOR }
{---------------------------------------------------------------------------}
TGroup = OBJECT (TView)
Phase : (phFocused, phPreProcess, phPostProcess);
EndState: Word; { Modal result }
Current : PView; { Selected subview }
Last : PView; { 1st view inserted }
Buffer : PVideoBuf; { Speed up buffer }
CONSTRUCTOR Init (Var Bounds: TRect);
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION First: PView;
FUNCTION Execute: Word; Virtual;
FUNCTION GetHelpCtx: Word; Virtual;
FUNCTION DataSize: Sw_Word; Virtual;
FUNCTION ExecView (P: PView): Word; Virtual;
FUNCTION FirstThat (P: Pointer): PView;
FUNCTION Valid (Command: Word): Boolean; Virtual;
FUNCTION FocusNext (Forwards: Boolean): Boolean;
PROCEDURE Draw; Virtual;
PROCEDURE Lock;
PROCEDURE UnLock;
PROCEDURE ResetCursor; Virtual;
PROCEDURE Awaken; Virtual;
PROCEDURE ReDraw;
PROCEDURE SelectDefaultView;
PROCEDURE Insert (P: PView);
PROCEDURE Delete (P: PView);
PROCEDURE ForEach (P: Pointer);
{ ForEach can't be virtual because it generates SIGSEGV }
PROCEDURE EndModal (Command: Word); Virtual;
PROCEDURE SelectNext (Forwards: Boolean);
PROCEDURE InsertBefore (P, Target: PView);
PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
PROCEDURE GetData (Var Rec); Virtual;
PROCEDURE SetData (Var Rec); Virtual;
PROCEDURE Store (Var S: TStream);
PROCEDURE EventError (Var Event: TEvent); Virtual;
PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
PROCEDURE GetSubViewPtr (Var S: TStream; Var P);
PROCEDURE PutSubViewPtr (Var S: TStream; P: PView);
function ClipChilds: boolean; virtual;
procedure BeforeInsert(P: PView); virtual;
procedure AfterInsert(P: PView); virtual;
procedure BeforeDelete(P: PView); virtual;
procedure AfterDelete(P: PView); virtual;
PRIVATE
LockFlag: Byte;
Clip : TRect;
FUNCTION IndexOf (P: PView): Sw_Integer;
FUNCTION FindNext (Forwards: Boolean): PView;
FUNCTION FirstMatch (AState: Word; AOptions: Word): PView;
PROCEDURE ResetCurrent;
PROCEDURE RemoveView (P: PView);
PROCEDURE InsertView (P, Target: PView);
PROCEDURE SetCurrent (P: PView; Mode: SelectMode);
procedure DrawSubViews(P, Bottom: PView);
END;
{---------------------------------------------------------------------------}
{ TFrame OBJECT - FRAME VIEW OBJECT }
{---------------------------------------------------------------------------}
TYPE
TFrame = OBJECT (TView)
CONSTRUCTOR Init (Var Bounds: TRect);
FUNCTION GetPalette: PPalette; Virtual;
procedure Draw; virtual;
procedure HandleEvent(var Event: TEvent); virtual;
procedure SetState(AState: Word; Enable: Boolean); virtual;
private
FrameMode: Word;
procedure FrameLine(var FrameBuf; Y, N: Sw_Integer; Color: Byte);
END;
PFrame = ^TFrame;
{---------------------------------------------------------------------------}
{ TScrollBar OBJECT - SCROLL BAR OBJECT }
{---------------------------------------------------------------------------}
TYPE
TScrollChars = Array [0..4] of Char;
TScrollBar = OBJECT (TView)
Value : Sw_Integer; { Scrollbar value }
Min : Sw_Integer; { Scrollbar minimum }
Max : Sw_Integer; { Scrollbar maximum }
PgStep: Sw_Integer; { One page step }
ArStep: Sw_Integer; { One range step }
Id : Sw_Integer; { Scrollbar ID }
CONSTRUCTOR Init (Var Bounds: TRect);
CONSTRUCTOR Load (Var S: TStream);
FUNCTION GetPalette: PPalette; Virtual;
FUNCTION ScrollStep (Part: Sw_Integer): Sw_Integer; Virtual;
PROCEDURE Draw; Virtual;
PROCEDURE ScrollDraw; Virtual;
PROCEDURE SetValue (AValue: Sw_Integer);
PROCEDURE SetRange (AMin, AMax: Sw_Integer);
PROCEDURE SetStep (APgStep, AArStep: Sw_Integer);
PROCEDURE SetParams (AValue, AMin, AMax, APgStep, AArStep: Sw_Integer);
PROCEDURE Store (Var S: TStream);
PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
PRIVATE
Chars: TScrollChars; { Scrollbar chars }
FUNCTION GetPos: Sw_Integer;
FUNCTION GetSize: Sw_Integer;
PROCEDURE DrawPos (Pos: Sw_Integer);
END;
PScrollBar = ^TScrollBar;
{---------------------------------------------------------------------------}
{ TScroller OBJECT - SCROLLING VIEW ANCESTOR }
{---------------------------------------------------------------------------}
TYPE
TScroller = OBJECT (TView)
Delta : TPoint;
Limit : TPoint;
HScrollBar: PScrollBar; { Horz scroll bar }
VScrollBar: PScrollBar; { Vert scroll bar }
CONSTRUCTOR Init (Var Bounds: TRect; AHScrollBar, AVScrollBar: PScrollBar);
CONSTRUCTOR Load (Var S: TStream);
FUNCTION GetPalette: PPalette; Virtual;
PROCEDURE ScrollDraw; Virtual;
PROCEDURE SetLimit (X, Y: Sw_Integer);
PROCEDURE ScrollTo (X, Y: Sw_Integer);
PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
PROCEDURE Store (Var S: TStream);
PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
PRIVATE
DrawFlag: Boolean;
DrawLock: Byte;
PROCEDURE CheckDraw;
END;
PScroller = ^TScroller;
{---------------------------------------------------------------------------}
{ TListViewer OBJECT - LIST VIEWER OBJECT }
{---------------------------------------------------------------------------}
TYPE
TListViewer = OBJECT (TView)
NumCols : Sw_Integer; { Number of columns }
TopItem : Sw_Integer; { Top most item }
Focused : Sw_Integer; { Focused item }
Range : Sw_Integer; { Range of listview }
HScrollBar: PScrollBar; { Horz scrollbar }
VScrollBar: PScrollBar; { Vert scrollbar }
CONSTRUCTOR Init (Var Bounds: TRect; ANumCols: Sw_Word; AHScrollBar,
AVScrollBar: PScrollBar);
CONSTRUCTOR Load (Var S: TStream);
FUNCTION GetPalette: PPalette; Virtual;
FUNCTION IsSelected (Item: Sw_Integer): Boolean; Virtual;
FUNCTION GetText (Item: Sw_Integer; MaxLen: Sw_Integer): String; Virtual;
PROCEDURE Draw; Virtual;
PROCEDURE FocusItem (Item: Sw_Integer); Virtual;
PROCEDURE SetTopItem (Item: Sw_Integer);
PROCEDURE SetRange (ARange: Sw_Integer);
PROCEDURE SelectItem (Item: Sw_Integer); Virtual;
PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
PROCEDURE Store (Var S: TStream);
PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
PROCEDURE ChangeBounds (Var Bounds: TRect); Virtual;
PROCEDURE FocusItemNum (Item: Sw_Integer); Virtual;
END;
PListViewer = ^TListViewer;
{---------------------------------------------------------------------------}
{ TWindow OBJECT - WINDOW OBJECT ANCESTOR }
{---------------------------------------------------------------------------}
TYPE
TWindow = OBJECT (TGroup)
Flags : Byte; { Window flags }
Number : Sw_Integer; { Window number }
Palette : Sw_Integer; { Window palette }
ZoomRect: TRect; { Zoom rectangle }
Frame : PFrame; { Frame view object }
Title : PString; { Title string }
CONSTRUCTOR Init (Var Bounds: TRect; ATitle: TTitleStr; ANumber: Sw_Integer);
CONSTRUCTOR Load (Var S: TStream);
DESTRUCTOR Done; Virtual;
FUNCTION GetPalette: PPalette; Virtual;
FUNCTION GetTitle (MaxSize: Sw_Integer): TTitleStr; Virtual;
FUNCTION StandardScrollBar (AOptions: Word): PScrollBar;
PROCEDURE Zoom; Virtual;
PROCEDURE Close; Virtual;
PROCEDURE InitFrame; Virtual;
PROCEDURE SetState (AState: Word; Enable: Boolean); Virtual;
PROCEDURE Store (Var S: TStream);
PROCEDURE HandleEvent (Var Event: TEvent); Virtual;
PROCEDURE SizeLimits (Var Min, Max: TPoint); Virtual;
END;
PWindow = ^TWindow;
{***************************************************************************}
{ INTERFACE ROUTINES }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ WINDOW MESSAGE ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-Message------------------------------------------------------------
Message sets up an event record and calls Receiver^.HandleEvent to
handle the event. Message returns nil if Receiver is nil, or if
the event is not handled successfully.
12Sep97 LdB
---------------------------------------------------------------------}
FUNCTION Message (Receiver: PView; What, Command: Word;
InfoPtr: Pointer): Pointer;
{-NewMessage---------------------------------------------------------
NewMessage sets up an event record including the new fields and calls
Receiver^.HandleEvent to handle the event. Message returns nil if
Receiver is nil, or if the event is not handled successfully.
19Sep97 LdB
---------------------------------------------------------------------}
FUNCTION NewMessage (P: PView; What, Command: Word; Id: Sw_Integer; Data: Real;
InfoPtr: Pointer): Pointer;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ VIEW OBJECT REGISTRATION ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-RegisterViews------------------------------------------------------
This registers all the view type objects used in this unit.
11Aug99 LdB
---------------------------------------------------------------------}
PROCEDURE RegisterViews;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ NEW VIEW ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{-CreateIdScrollBar--------------------------------------------------
Creates and scrollbar object of the given size and direction and sets
the scrollbar id number.
22Sep97 LdB
---------------------------------------------------------------------}
FUNCTION CreateIdScrollBar (X, Y, Size, Id: Sw_Integer; Horz: Boolean): PScrollBar;
{***************************************************************************}
{ INITIALIZED PUBLIC VARIABLES }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ INITIALIZED DOS/DPMI/WIN/NT/OS2 VARIABLES }
{---------------------------------------------------------------------------}
CONST
UseNativeClasses: Boolean = True; { Native class modes }
CommandSetChanged: Boolean = False; { Command change flag }
ShowMarkers: Boolean = False; { Show marker state }
ErrorAttr: Byte = $CF; { Error colours }
PositionalEvents: Word = evMouse; { Positional defined }
FocusedEvents: Word = evKeyboard + evCommand; { Focus defined }
MinWinSize: TPoint = (X: 16; Y: 6); { Minimum window size }
ShadowSize: TPoint = (X: 2; Y: 1); { Shadow sizes }
ShadowAttr: Byte = $08; { Shadow attribute }
{ Characters used for drawing selected and default items in }
{ monochrome color sets }
SpecialChars: Array [0..5] Of Char = (#175, #174, #26, #27, ' ', ' ');
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ STREAM REGISTRATION RECORDS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{---------------------------------------------------------------------------}
{ TView STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RView: TStreamRec = (
ObjType: idView; { Register id = 1 }
VmtLink: TypeOf(TView); { Alt style VMT link }
Load: @TView.Load; { Object load method }
Store: @TView.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TFrame STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RFrame: TStreamRec = (
ObjType: idFrame; { Register id = 2 }
VmtLink: TypeOf(TFrame); { Alt style VMT link }
Load: @TFrame.Load; { Frame load method }
Store: @TFrame.Store { Frame store method }
);
{---------------------------------------------------------------------------}
{ TScrollBar STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RScrollBar: TStreamRec = (
ObjType: idScrollBar; { Register id = 3 }
VmtLink: TypeOf(TScrollBar); { Alt style VMT link }
Load: @TScrollBar.Load; { Object load method }
Store: @TScrollBar.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TScroller STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RScroller: TStreamRec = (
ObjType: idScroller; { Register id = 4 }
VmtLink: TypeOf(TScroller); { Alt style VMT link }
Load: @TScroller.Load; { Object load method }
Store: @TScroller.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TListViewer STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RListViewer: TStreamRec = (
ObjType: idListViewer; { Register id = 5 }
VmtLink: TypeOf(TListViewer); { Alt style VMT link }
Load: @TListViewer.Load; { Object load method }
Store: @TLIstViewer.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TGroup STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RGroup: TStreamRec = (
ObjType: idGroup; { Register id = 6 }
VmtLink: TypeOf(TGroup); { Alt style VMT link }
Load: @TGroup.Load; { Object load method }
Store: @TGroup.Store { Object store method }
);
{---------------------------------------------------------------------------}
{ TWindow STREAM REGISTRATION }
{---------------------------------------------------------------------------}
CONST
RWindow: TStreamRec = (
ObjType: idWindow; { Register id = 7 }
VmtLink: TypeOf(TWindow); { Alt style VMT link }
Load: @TWindow.Load; { Object load method }
Store: @TWindow.Store { Object store method }
);
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
IMPLEMENTATION
{<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>}
USES
Video;
{***************************************************************************}
{ PRIVATE TYPE DEFINITIONS }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ TFixupList DEFINITION }
{---------------------------------------------------------------------------}
TYPE
TFixupList = ARRAY [1..4096] Of Pointer; { Fix up ptr array }
PFixupList = ^TFixupList; { Ptr to fix up list }
{***************************************************************************}
{ PRIVATE INITIALIZED VARIABLES }
{***************************************************************************}
{---------------------------------------------------------------------------}
{ INITIALIZED DOS/DPMI/WIN/NT/OS2 PRIVATE VARIABLES }
{---------------------------------------------------------------------------}
CONST
TheTopView : PView = Nil; { Top focused view }
LimitsLocked: PView = Nil; { View locking limits }
OwnerGroup : PGroup = Nil; { Used for loading }
FixupList : PFixupList = Nil; { Used for loading }
CurCommandSet: TCommandSet = ([0..255] -
[cmZoom, cmClose, cmResize, cmNext, cmPrev]); { All active but these }
vdInSetCursor = $80; { AVOID RECURSION IN SetCursor }
{ Flags for TFrame }
fmCloseClicked = $01;
fmZoomClicked = $02;
type
TstatVar2 = record
target : PView;
offset,y : integer;
end;
var
staticVar1 : PDrawBuffer;
staticVar2 : TstatVar2;
{***************************************************************************}
{ PRIVATE INTERNAL ROUTINES }
{***************************************************************************}
function posidx(const substr,s : string;idx:sw_integer):sw_integer;
var
i,j : sw_integer;
e : boolean;
begin
i:=idx;
j:=0;
e:=(length(SubStr)>0);
while e and (i<=Length(s)-Length(SubStr)) do
begin
if (SubStr[1]=s[i]) and (Substr=Copy(s,i,Length(SubStr))) then
begin
j:=i;
e:=false;
end;
inc(i);
end;
PosIdx:=j;
end;
{$ifdef UNIX}
const
MouseUsesVideoBuf = true;
{$else not UNIX}
const
MouseUsesVideoBuf = false;
{$endif not UNIX}
procedure DrawScreenBuf(force:boolean);
begin
if (GetLockScreenCount=0) then
begin
{ If MouseUsesVideoBuf then
begin
LockScreenUpdate;
HideMouse;
ShowMouse;
UnlockScreenUpdate;
end
else
HideMouse;}
UpdateScreen(force);
{ If not MouseUsesVideoBuf then
ShowMouse;}
end;
end;
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ VIEW PORT CONTROL ROUTINES }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
TYPE
ViewPortType = RECORD
X1, Y1, X2, Y2: Integer; { Corners of viewport }
Clip : Boolean; { Clip status }
END;
var
ViewPort : ViewPortType;
{---------------------------------------------------------------------------}
{ GetViewSettings -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
PROCEDURE GetViewSettings (Var CurrentViewPort: ViewPortType);
BEGIN
CurrentViewPort := ViewPort; { Textmode viewport }
END;
{---------------------------------------------------------------------------}
{ SetViewPort -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 05Dec2000 LdB }
{---------------------------------------------------------------------------}
PROCEDURE SetViewPort (X1, Y1, X2, Y2: Integer; Clip: Boolean);
BEGIN
If (X1 < 0) Then X1 := 0; { X1 negative fix }
If (X1 >ScreenWidth) Then
X1 := ScreenWidth; { X1 off screen fix }
If (Y1 < 0) Then Y1 := 0; { Y1 negative fix }
If (Y1 > ScreenHeight) Then
Y1 := ScreenHeight; { Y1 off screen fix }
If (X2 < 0) Then X2 := 0; { X2 negative fix }
If (X2 > ScreenWidth) Then
X2 := ScreenWidth; { X2 off screen fix }
If (Y2 < 0) Then Y2 := 0; { Y2 negative fix }
If (Y2 > ScreenHeight) Then
Y2 := ScreenHeight; { Y2 off screen fix }
ViewPort.X1 := X1; { Set X1 port value }
ViewPort.Y1 := Y1; { Set Y1 port value }
ViewPort.X2 := X2; { Set X2 port value }
ViewPort.Y2 := Y2; { Set Y2 port value }
ViewPort.Clip := Clip; { Set port clip value }
{ $ifdef DEBUG
If WriteDebugInfo then
Writeln(stderr,'New ViewPort(',X1,',',Y1,',',X2,',',Y2,')');
$endif DEBUG}
END;
{***************************************************************************}
{ OBJECT METHODS }
{***************************************************************************}
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{ TView OBJECT METHODS }
{+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++}
{--TView--------------------------------------------------------------------}
{ Init -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 20Jun96 LdB }
{---------------------------------------------------------------------------}
CONSTRUCTOR TView.Init (Var Bounds: TRect);
BEGIN
Inherited Init; { Call ancestor }
DragMode := dmLimitLoY; { Default drag mode }
HelpCtx := hcNoContext; { Clear help context }
State := sfVisible; { Default state }
EventMask := evMouseDown + evKeyDown + evCommand; { Default event masks }
BackgroundChar := ' ';
SetBounds(Bounds); { Set view bounds }
END;
{--TView--------------------------------------------------------------------}
{ Load -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 06May98 LdB }
{---------------------------------------------------------------------------}
{ This load method will read old original TV data from a stream but the }
{ new options and tabmasks are not set so some NEW functionality is not }
{ supported but it should work as per original TV code. }
{---------------------------------------------------------------------------}
CONSTRUCTOR TView.Load (Var S: TStream);
VAR i: Integer;
BEGIN
Inherited Init; { Call ancestor }
S.Read(i, SizeOf(i)); Origin.X:=i; { Read origin x value }
S.Read(i, SizeOf(i)); Origin.Y:=i; { Read origin y value }
S.Read(i, SizeOf(i)); Size.X:=i; { Read view x size }
S.Read(i, SizeOf(i)); Size.Y:=i; { Read view y size }
S.Read(i, SizeOf(i)); Cursor.X:=i; { Read cursor x size }
S.Read(i, SizeOf(i)); Cursor.Y:=i; { Read cursor y size }
S.Read(GrowMode, SizeOf(GrowMode)); { Read growmode flags }
S.Read(DragMode, SizeOf(DragMode)); { Read dragmode flags }
S.Read(HelpCtx, SizeOf(HelpCtx)); { Read help context }
S.Read(State, SizeOf(State)); { Read state masks }
S.Read(Options, SizeOf(Options)); { Read options masks }
S.Read(Eventmask, SizeOf(Eventmask)); { Read event masks }
END;
{--TView--------------------------------------------------------------------}
{ Done -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 17Nov99 LdB }
{---------------------------------------------------------------------------}
DESTRUCTOR TView.Done;
VAR P: PComplexArea;
BEGIN
Hide; { Hide the view }
If (Owner <> Nil) Then Owner^.Delete(@Self); { Delete from owner }
While (HoldLimit <> Nil) Do Begin { Free limit memory }
P := HoldLimit^.NextArea; { Hold next pointer }
FreeMem(HoldLimit, SizeOf(TComplexArea)); { Release memory }
HoldLimit := P; { Shuffle to next }
End;
END;
{--TView--------------------------------------------------------------------}
{ Prev -> Platforms DOS/DPMI/WIN/NT/OS2 - Updated 12Sep97 LdB }
{---------------------------------------------------------------------------}
FUNCTION TView.Prev: PView;
VAR NP : PView;
BEGIN
Prev := @Self;
NP := Next;
While (NP <> Nil) AND (NP <> @Self) Do
Begin