rxctrls.pas

RX Library contains a large number of components, objects and routines for Borland Delphi with full

{*******************************************************}
{                                                       }
{         Delphi VCL Extensions (RX)                    }
{                                                       }
{         Copyright (c) 1995, 1996 AO ROSNO             }
{         Copyright (c) 1997, 1998 Master-Bank          }
{                                                       }
{*******************************************************}

unit RXCtrls;

{$I RX.INC}
{$W-,T-}

interface

uses Windows, Registry, RTLConsts,  Messages, Classes, Controls, Graphics, StdCtrls, ExtCtrls, Forms,
  Buttons, Menus, RxTimer, RxConst, IniFiles, Placemnt;

type
  TPositiveInt = 1..MaxInt;

{ TTextListBox }

  TTextListBox = class(TCustomListBox)
  private
    FMaxWidth: Integer;
{$IFNDEF WIN32}
    FTabWidth: Integer;
    procedure SetTabWidth(Value: Integer);
{$ENDIF}
    procedure ResetHorizontalExtent;
    procedure SetHorizontalExtent;
    function GetItemWidth(Index: Integer): Integer;
  protected
{$IFNDEF WIN32}
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
{$ENDIF}
    procedure WndProc(var Message: TMessage); override;
  published
    property Align;
    property BorderStyle;
    property Color;
    property Ctl3D;
    property DragCursor;
    property DragMode;
    property Enabled;
    property ExtendedSelect;
    property Font;
    property IntegralHeight;
{$IFDEF RX_D4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
{$ENDIF}
{$IFDEF WIN32}
  {$IFNDEF VER90}
    property ImeMode;
    property ImeName;
  {$ENDIF}
{$ENDIF}
    property ItemHeight;
    property Items;
    property MultiSelect;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Sorted;
    property TabOrder;
    property TabStop;
{$IFDEF WIN32}
    property TabWidth;
{$ELSE}
    property TabWidth: Integer read FTabWidth write SetTabWidth default 0;
{$ENDIF}
    property Visible;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
{$IFDEF RX_D5}
    property OnContextPopup;
{$ENDIF}
{$IFDEF RX_D4}
    property OnMouseWheelDown;
    property OnMouseWheelUp;
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

{ TRxCustomListBox }

  TGetItemWidthEvent = procedure(Control: TWinControl; Index: Integer;
    var Width: Integer) of object;

  TRxCustomListBox = class(TWinControl)
  private
    FItems: TStrings;
    FBorderStyle: TBorderStyle;
    FCanvas: TCanvas;
    FColumns: Integer;
    FItemHeight: Integer;
    FStyle: TListBoxStyle;
    FIntegralHeight: Boolean;
    FMultiSelect: Boolean;
    FSorted: Boolean;
    FExtendedSelect: Boolean;
    FTabWidth: Integer;
    FSaveItems: TStringList;
    FSaveTopIndex: Integer;
    FSaveItemIndex: Integer;
    FAutoScroll: Boolean;
    FGraySelection: Boolean;
    FMaxItemWidth: Integer;
    FOnDrawItem: TDrawItemEvent;
    FOnMeasureItem: TMeasureItemEvent;
    FOnGetItemWidth: TGetItemWidthEvent;
    procedure ResetHorizontalExtent;
    procedure SetHorizontalExtent;
    function GetAutoScroll: Boolean;
    function GetItemHeight: Integer; virtual;
    function GetItemIndex: Integer;
    function GetSelCount: Integer;
    function GetSelected(Index: Integer): Boolean;
    function GetTopIndex: Integer;
    procedure SetAutoScroll(Value: Boolean);
    procedure SetBorderStyle(Value: TBorderStyle);
    procedure SetColumnWidth;
    procedure SetColumns(Value: Integer);
    procedure SetExtendedSelect(Value: Boolean);
    procedure SetIntegralHeight(Value: Boolean);
    procedure SetItemHeight(Value: Integer);
    procedure SetItemIndex(Value: Integer);
    procedure SetMultiSelect(Value: Boolean);
    procedure SetSelected(Index: Integer; Value: Boolean);
    procedure SetSorted(Value: Boolean);
    procedure SetStyle(Value: TListBoxStyle);
    procedure SetTabWidth(Value: Integer);
    procedure SetTopIndex(Value: Integer);
    procedure SetGraySelection(Value: Boolean);
    procedure SetOnDrawItem(Value: TDrawItemEvent);
    procedure SetOnGetItemWidth(Value: TGetItemWidthEvent);
    procedure WMPaint(var Message: TWMPaint); message WM_PAINT;
    procedure WMSize(var Message: TWMSize); message WM_SIZE;
    procedure CNCommand(var Message: TWMCommand); message CN_COMMAND;
    procedure CNDrawItem(var Message: TWMDrawItem); message CN_DRAWITEM;
    procedure CNMeasureItem(var Message: TWMMeasureItem); message CN_MEASUREITEM;
    procedure WMLButtonDown(var Message: TWMLButtonDown); message WM_LBUTTONDOWN;
    procedure WMNCHitTest(var Msg: TWMNCHitTest); message WM_NCHITTEST;
    procedure WMKillFocus(var Msg: TWMKillFocus); message WM_KILLFOCUS;
    procedure WMSetFocus(var Msg: TWMSetFocus); message WM_SETFOCUS;
{$IFDEF WIN32}
    procedure CMCtl3DChanged(var Message: TMessage); message CM_CTL3DCHANGED;
{$ENDIF}
  protected
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
    procedure DestroyWnd; override;
    function CreateItemList: TStrings; virtual;
    function GetItemWidth(Index: Integer): Integer; virtual;
    procedure WndProc(var Message: TMessage); override;
    procedure DragCanceled; override;
    procedure DrawItem(Index: Integer; Rect: TRect;
      State: TOwnerDrawState); virtual;
    procedure MeasureItem(Index: Integer; var Height: Integer); virtual;
    function GetItemData(Index: Integer): Longint; dynamic;
    procedure SetItemData(Index: Integer; AData: LongInt); dynamic;
    procedure SetItems(Value: TStrings); virtual;
    procedure ResetContent; dynamic;
    procedure DeleteString(Index: Integer); dynamic;
    property AutoScroll: Boolean read GetAutoScroll write SetAutoScroll default False;
    property BorderStyle: TBorderStyle read FBorderStyle write SetBorderStyle default bsSingle;
    property Columns: Integer read FColumns write SetColumns default 0;
    property ExtendedSelect: Boolean read FExtendedSelect write SetExtendedSelect default True;
    property GraySelection: Boolean read FGraySelection write SetGraySelection default False;
    property IntegralHeight: Boolean read FIntegralHeight write SetIntegralHeight default False;
    property ItemHeight: Integer read GetItemHeight write SetItemHeight;
    property MultiSelect: Boolean read FMultiSelect write SetMultiSelect default False;
    property ParentColor default False;
    property Sorted: Boolean read FSorted write SetSorted default False;
    property Style: TListBoxStyle read FStyle write SetStyle default lbStandard;
    property TabWidth: Integer read FTabWidth write SetTabWidth default 0;
    property OnDrawItem: TDrawItemEvent read FOnDrawItem write SetOnDrawItem;
    property OnMeasureItem: TMeasureItemEvent read FOnMeasureItem write FOnMeasureItem;
    property OnGetItemWidth: TGetItemWidthEvent read FOnGetItemWidth write SetOnGetItemWidth;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure Clear;
    procedure DefaultDrawText(X, Y: Integer; const S: string);
    function ItemAtPos(Pos: TPoint; Existing: Boolean): Integer;
    function ItemRect(Index: Integer): TRect;
    property Canvas: TCanvas read FCanvas;
    property Items: TStrings read FItems write SetItems;
    property ItemIndex: Integer read GetItemIndex write SetItemIndex;
    property SelCount: Integer read GetSelCount;
    property Selected[Index: Integer]: Boolean read GetSelected write SetSelected;
    property TopIndex: Integer read GetTopIndex write SetTopIndex;
  published
    property TabStop default True;
  end;

{ TRxCheckListBox }

  TCheckKind = (ckCheckBoxes, ckRadioButtons, ckCheckMarks);
  TChangeStateEvent = procedure (Sender: TObject; Index: Integer) of object;

  TRxCheckListBox = class(TRxCustomListBox)
  private
    FAllowGrayed: Boolean;
    FCheckKind: TCheckKind;
    FSaveStates: TList;
    FDrawBitmap: TBitmap;
    FCheckWidth, FCheckHeight: Integer;
    FReserved: Integer;
    FInUpdateStates: Boolean;
    FIniLink: TIniLink;
    FOnClickCheck: TNotifyEvent;
    FOnStateChange: TChangeStateEvent;
    procedure ResetItemHeight;
    function GetItemHeight: Integer; override;
    procedure DrawCheck(R: TRect; AState: TCheckBoxState; Enabled: Boolean);
    procedure SetCheckKind(Value: TCheckKind);
    procedure SetChecked(Index: Integer; AChecked: Boolean);
    function GetChecked(Index: Integer): Boolean;
    procedure SetState(Index: Integer; AState: TCheckBoxState);
    function GetState(Index: Integer): TCheckBoxState;
    procedure SetItemEnabled(Index: Integer; Value: Boolean);
    function GetItemEnabled(Index: Integer): Boolean;
    function GetAllowGrayed: Boolean;
    procedure ToggleClickCheck(Index: Integer);
    procedure InvalidateCheck(Index: Integer);
    procedure InvalidateItem(Index: Integer);
    function CreateCheckObject(Index: Integer): TObject;
    function FindCheckObject(Index: Integer): TObject;
    function GetCheckObject(Index: Integer): TObject;
    function IsCheckObject(Index: Integer): Boolean;
    procedure ReadVersion(Reader: TReader);
    procedure WriteVersion(Writer: TWriter);
    procedure ReadCheckData(Reader: TReader);
    procedure WriteCheckData(Writer: TWriter);
    procedure InternalSaveStates(IniFile: TObject; const Section: string);
    procedure InternalRestoreStates(IniFile: TObject; const Section: string);
    function GetStorage: TFormPlacement;
    procedure SetStorage(Value: TFormPlacement);
    procedure IniSave(Sender: TObject);
    procedure IniLoad(Sender: TObject);
    procedure UpdateCheckStates;
    function GetCheckedIndex: Integer;
    procedure SetCheckedIndex(Value: Integer);
    procedure CNDrawItem(var Message: TWMDrawItem); message CN_DRAWITEM;
    procedure CMFontChanged(var Message: TMessage); message CM_FONTCHANGED;
  protected
    function CreateItemList: TStrings; override;
    procedure DrawItem(Index: Integer; Rect: TRect;
      State: TOwnerDrawState); override;
    procedure DefineProperties(Filer: TFiler); override;
    function GetItemWidth(Index: Integer): Integer; override;
    function GetItemData(Index: Integer): LongInt; override;
    procedure SetItemData(Index: Integer; AData: LongInt); override;
    procedure KeyPress(var Key: Char); override;
    procedure Loaded; override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure ResetContent; override;
    procedure DeleteString(Index: Integer); override;
    procedure ClickCheck; dynamic;
    procedure ChangeItemState(Index: Integer); dynamic;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure CreateWnd; override;
    procedure DestroyWnd; override;
    procedure WMDestroy(var Msg: TWMDestroy); message WM_DESTROY;
    function GetCheckWidth: Integer;
    procedure SetItems(Value: TStrings); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
{$IFDEF WIN32}
    procedure SaveStatesReg(IniFile: TRegIniFile);
    procedure RestoreStatesReg(IniFile: TRegIniFile);
{$ENDIF WIN32}
    procedure SaveStates(IniFile: TIniFile);
    procedure RestoreStates(IniFile: TIniFile);
    procedure ApplyState(AState: TCheckBoxState; EnabledOnly: Boolean);
    property Checked[Index: Integer]: Boolean read GetChecked write SetChecked;
    property State[Index: Integer]: TCheckBoxState read GetState write SetState;
    property EnabledItem[Index: Integer]: Boolean read GetItemEnabled write SetItemEnabled;
  published
    property AllowGrayed: Boolean read GetAllowGrayed write FAllowGrayed default False;
    property CheckKind: TCheckKind read FCheckKind write SetCheckKind default ckCheckBoxes;
    property CheckedIndex: Integer read GetCheckedIndex write SetCheckedIndex default -1;
    property IniStorage: TFormPlacement read GetStorage write SetStorage;
    property Align;
    property AutoScroll default True;
    property BorderStyle;
    property Color;
    property Columns;
    property Ctl3D;
    property DragCursor;
    property DragMode;
    property Enabled;
    property ExtendedSelect;
    property Font;
    property GraySelection;
{$IFDEF RX_D4}
    property Anchors;
    property BiDiMode;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
{$ENDIF}
{$IFDEF WIN32}
  {$IFNDEF VER90}
    property ImeMode;
    property ImeName;
  {$ENDIF}
{$ENDIF}
    property IntegralHeight;
    property ItemHeight;
    property Items stored False;
    property MultiSelect;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property Sorted;
    property Style;
    property TabOrder;
    property TabWidth;
    property Visible;
    property OnStateChange: TChangeStateEvent read FOnStateChange write FOnStateChange;
    property OnClickCheck: TNotifyEvent read FOnClickCheck write FOnClickCheck;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnDrawItem;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnGetItemWidth;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMeasureItem;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
{$IFDEF WIN32}
    property OnStartDrag;
{$ENDIF}
{$IFDEF RX_D5}
    property OnContextPopup;
{$ENDIF}
{$IFDEF RX_D4}
    property OnMouseWheelDown;
    property OnMouseWheelUp;
    property OnEndDock;
    property OnStartDock;
{$ENDIF}
  end;

const
  clbDefaultState = cbUnchecked;
  clbDefaultEnabled = True;

{ TRxCustomLabel }

type
  TShadowPosition = (spLeftTop, spLeftBottom, spRightBottom, spRightTop);
{$IFNDEF RX_D3}
  TTextLayout = (tlTop, tlCenter, tlBottom);
{$ENDIF}

  TRxCustomLabel = class(TGraphicControl)
  private
    FFocusControl: TWinControl;
    FAlignment: TAlignment;
    FAutoSize: Boolean;
    FLayout: TTextLayout;
    FShadowColor: TColor;
    FShadowSize: Byte;
    FShadowPos: TShadowPosition;
    FWordWrap: Boolean;
    FShowAccelChar: Boolean;
    FShowFocus: Boolean;
    FFocused: Boolean;
    FMouseInControl: Boolean;
    FDragging: Boolean;