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Copy pathSCDbExtCtrls.pas
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1919 lines (1691 loc) · 47.5 KB
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{*******************************************************}
{ }
{ CA SweetControls Component Library }
{ }
{ Copyright (c) 1996,2004 CodeAccelerate Corporation }
{ }
{*******************************************************}
unit SCDbExtCtrls;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
Db, DbConsts, SCConsts, SCCommon, SCDbCommon, SCControl, SCStdControls,
SCDbCtrls, SCTrackbar, SCScrollbars, SCRadioGroup, SCLinkedControls,
SCSimpleListbox;
type
TSCCustomDBTrackbar = class(TSCCustomTrackbar)
private
FDataLink: TSCFieldDataLink;
FValue: String;
FValues: TStrings;
FChangingData: Integer;
function GetDataField: String;
procedure SetDataField(const Value: String);
function GetDataSource: TDataSource;
procedure SetDataSource(Value: TDataSource);
function GetField: TField;
function GetPositionValue(Index: Integer): String;
function GetReadOnly: Boolean;
procedure SetReadOnly(Value: Boolean);
function GetValue: String;
procedure SetValue(const Value: String);
function GetValuePosition(Value: String): Integer;
procedure SetValues(Value: TStrings);
procedure DataChange(Sender: TObject);
procedure UpdateData(Sender: TObject);
procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
protected
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
function GetPosition: Integer; override;
procedure BeforeExit; override;
procedure ListChanged(Sender: TObject);
procedure DoChange; override;
procedure KeyPress(var Key: Char); override;
function CanSetValue(var Value: Integer): Boolean; override;
function CanSetUserValue(var Value: Integer): Boolean; override;
property DataLink: TSCFieldDataLink read FDataLink;
property DataField: String read GetDataField write SetDataField;
property DataSource: TDataSource read GetDataSource write SetDataSource;
property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
property Values: TStrings read FValues write SetValues;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
property Position;
property Field: TField read GetField;
property Value: string read GetValue write SetValue;
end;
TSCDBTrackbar = class(TSCCustomDBTrackbar)
published
property Align;
property Anchors;
property BlendColor;
property BorderProps;
property Color;
property Constraints;
property Cursor;
property DataField;
property DataSource;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property Frequency;
property Hint;
property Images;
property ImageIndex;
property Indent;
property LineColor;
property LinePosition;
property LineSize;
property Max;
property Min;
property Orientation;
property PageSize;
property ParentColor;
property ParentShowHint;
property Picture;
property PictureProps;
property PopupMenu;
property Progress;
property ReadOnly;
property ShowHint;
property ShowFocusRect;
property ShowLines;
property ShowProgress;
property ShowSlider;
property Slider;
property Spacing;
property Values;
property TabOrder;
property TabStop;
property Transparent;
property Tag;
property OnChange;
property OnClick;
property OnCanResize;
property OnConstrainedResize;
property OnContextPopup;
property OnDockDrop;
property OnDockOver;
property OnDragDrop;
property OnDragOver;
property OnDblClick;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnGetSiteInfo;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnResize;
property OnStartDock;
property OnStartDrag;
end;
TSCCustomDBProgress = class(TSCCustomProgress)
private
FDataLink: TSCFieldDataLink;
FValue: String;
FValues: TStrings;
FChangingData: Integer;
function GetDataField: String;
procedure SetDataField(const Value: String);
function GetDataSource: TDataSource;
procedure SetDataSource(Value: TDataSource);
function GetField: TField;
function GetPositionValue(Index: Integer): String;
function GetReadOnly: Boolean;
procedure SetReadOnly(Value: Boolean);
function GetValue: String;
procedure SetValue(const Value: String);
function GetValuePosition(Value: String): Integer;
procedure SetValues(Value: TStrings);
procedure DataChange(Sender: TObject);
procedure UpdateData(Sender: TObject);
procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
protected
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
function GetPosition: Integer; override;
procedure BeforeExit; override;
procedure ListChanged(Sender: TObject);
procedure DoChange; override;
procedure KeyPress(var Key: Char); override;
function CanSetValue(var Value: Integer): Boolean; override;
property DataLink: TSCFieldDataLink read FDataLink;
property DataField: String read GetDataField write SetDataField;
property DataSource: TDataSource read GetDataSource write SetDataSource;
property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
property Values: TStrings read FValues write SetValues;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
property Position;
property Percentage;
property Field: TField read GetField;
property Value: string read GetValue write SetValue;
end;
TSCDBProgress = class(TSCCustomDBProgress)
published
property Align;
property Anchors;
property BorderProps;
property Color;
property Constraints;
property Cursor;
property DataField;
property DataSource;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property Max;
property Min;
property Orientation;
property ParentColor;
property ParentShowHint;
property Picture;
property PictureProps;
property PopupMenu;
property PositionColor;
property PositionEndColor;
property ReadOnly;
property ShowHint;
property Slice;
property Step;
property Style;
property TabOrder;
property TabStop;
property Tag;
property Transparent;
property Values;
property Visible;
property OnCanResize;
property OnChange;
property OnClick;
property OnContextPopup;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnResize;
property OnStartDock;
property OnStartDrag;
end;
TSCCustomDBScrollbar = class(TSCCustomScrollbar)
private
FDataLink: TSCFieldDataLink;
FValue: String;
FValues: TStrings;
FChangingData: Integer;
function GetDataField: String;
procedure SetDataField(const Value: String);
function GetDataSource: TDataSource;
procedure SetDataSource(Value: TDataSource);
function GetField: TField;
function GetValuePosition(Value: String): Integer;
function GetPositionValue(Index: Integer): String;
function GetReadOnly: Boolean;
procedure SetReadOnly(Value: Boolean);
function GetValue: String;
procedure SetValue(const Value: String);
procedure SetValues(Value: TStrings);
procedure DataChange(Sender: TObject);
procedure UpdateData(Sender: TObject);
procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
protected
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
function GetPosition: Integer; override;
procedure BeforeExit; override;
procedure ListChanged(Sender: TObject);
procedure DoChange; override;
procedure KeyPress(var Key: Char); override;
function CanSetValue(var Value: Integer): Boolean; override;
property ClickFocus default True;
property DataLink: TSCFieldDataLink read FDataLink;
property DataField: String read GetDataField write SetDataField;
property DataSource: TDataSource read GetDataSource write SetDataSource;
property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
property Values: TStrings read FValues write SetValues;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
property Position;
property Field: TField read GetField;
property Value: string read GetValue write SetValue;
end;
TSCDBScrollbar = class(TSCCustomDBScrollbar)
published
property Align;
property Anchors;
property BackColors;
property BorderProps;
property ButtonColors;
property ButtonIconColors;
property ButtonLayout;
property ButtonSize;
property ClickFocus;
property Constraints;
property Cursor;
property DataField;
property DataSource;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property LargeChange;
property Max;
property Min;
property Kind;
property PageSize;
property ParentShowHint;
property ReadOnly;
property Sensitivity;
property ShowButtons;
property ShowHint;
property ShowSlideLine;
property ShowThumb;
property SmallChange;
property Style;
property TabOrder;
property TabStop;
property ThumbColors;
property ThumbLines;
property ThumbSize;
property Tracking;
property TrimPageSize;
property Values;
property Visible;
property OnCanResize;
property OnChange;
property OnClick;
property OnContextPopup;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseMove;
property OnMouseUp;
property OnResize;
property OnStartDock;
property OnStartDrag;
end;
TSCCustomDBRadioGroup = class(TSCCustomRadioGroup)
private
FDataLink: TSCFieldDataLink;
FValue: string;
FValues: TStrings;
FInSetValue: Boolean;
function GetDataField: string;
procedure SetDataField(const Value: string);
function GetDataSource: TDataSource;
procedure SetDataSource(Value: TDataSource);
function GetField: TField;
function GetReadOnly: Boolean;
procedure SetReadOnly(Value: Boolean);
procedure SetValue(const Value: string);
procedure SetValues(Value: TStrings);
function GetButtonValue(Index: Integer): string;
procedure DataChange(Sender: TObject);
procedure UpdateData(Sender: TObject);
protected
procedure Click; override;
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
procedure BeforeExit; override;
procedure ItemsChanged; override;
procedure KeyPress(var Key: Char); override;
function CanModify: Boolean; override;
property DataLink: TSCFieldDataLink read FDataLink;
property DataField: string read GetDataField write SetDataField;
property DataSource: TDataSource read GetDataSource write SetDataSource;
property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
property Values: TStrings read FValues write SetValues;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
function ExecuteAction(Action: TBasicAction): Boolean; override;
function UpdateAction(Action: TBasicAction): Boolean; override;
function UseRightToLeftAlignment: Boolean; override;
property Field: TField read GetField;
property ItemIndex;
property Value: string read FValue write SetValue;
end;
TSCDBRadioGroup = class(TSCCustomDBRadioGroup)
published
property Align;
property Alignment;
property Anchors;
property AsCheckbox;
property Bevel;
property BevelEdges;
property BevelColor;
property BevelWidth;
property BiDiMode;
property BorderProps;
property BoxCheckedColor;
property BoxFrameColor;
property BoxToggleColor;
property BoxUncheckedColor;
property Caption;
property CaptionBevel;
property CaptionBevelColor;
property CaptionBkColor;
property Color;
property Columns;
property Constraints;
property Cursor;
property DataField;
property DataSource;
property DockSite;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property EndEllipsis;
property Font;
property HighlightColor;
property HottrackColor;
property Images;
property ImageChecked;
property ImageToggle;
property ImageUnchecked;
property ImageMark;
property Indent;
property ItemColor;
property ItemDisabledColor;
property ItemHotColor;
property ItemHotUnderline;
property ItemHottrack;
property Items;
property Layout;
property MarkColor;
property Multiline;
property ParentBiDiMode;
property ParentColor;
property ParentFont;
property ParentShowHint;
property Picture;
property PictureProps;
property PopupMenu;
property ReadOnly;
property ShowHint;
property Spacing;
property SpareColor;
property Style;
property TabOrder;
property TabStop;
property Transparent;
property UseDockManager;
property Values;
property Visible;
property OnCanResize;
property OnChange;
property OnClick;
property OnContextPopup;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseMove;
property OnMouseUp;
property OnResize;
property OnStartDock;
property OnStartDrag;
end;
TDBSCRadioGroup = class(TSCDBRadioGroup);
TSCCustomDBListBoxEx = class(TSCCustomListboxEx)
private
FChangingData: Integer;
FDataLink: TSCFieldDataLink;
FUseValues: Boolean;
function GetDataField: string;
procedure SetDataField(const Value: string);
function GetDataSource: TDataSource;
procedure SetDataSource(Value: TDataSource);
function GetField: TField;
function GetReadOnly: Boolean;
procedure SetReadOnly(Value: Boolean);
procedure SetUseValues(Value: Boolean);
procedure DataChange(Sender: TObject);
procedure UpdateData(Sender: TObject);
procedure WMLButtonDown(var Message: TWMLButtonDown); message WM_LBUTTONDOWN;
procedure CMExit(var Message: TCMExit); message CM_EXIT;
protected
procedure Notification(AComponent: TComponent;
Operation: TOperation); override;
procedure Click; override;
procedure DoSetItems; override;
procedure CanChangeCheckState(OldSt: TSCCheckState; var NewSt: TSCCheckState); override;
function CanChangeItemIndex(Index: Integer): Integer; override;
procedure KeyDown(var Key: Word; Shift: TShiftState); override;
procedure KeyPress(var Key: Char); override;
property DataField: string read GetDataField write SetDataField;
property DataSource: TDataSource read GetDataSource write SetDataSource;
property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
property UseValues: Boolean read FUseValues write SetUseValues default False;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
function ExecuteAction(Action: TBasicAction): Boolean; override;
function UpdateAction(Action: TBasicAction): Boolean; override;
function UseRightToLeftAlignment: Boolean; override;
property ItemIndex;
property Field: TField read GetField;
end;
TSCDBListBoxEx = class(TSCCustomDBListBoxEx)
published
property Align;
property Anchors;
property BiDiMode;
property BorderProps;
property CenterImages;
property Color;
property Colors;
property Columns;
property Constraints;
property DataField;
property DataSource;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property EndEllipsis;
property Font;
property HideFocusRect;
property HideSelection;
property Hottrack;
property HottrackColor;
property HottrackUnderline;
property Images;
property ImeMode;
property ImeName;
property ItemHeight;
property ItemsEx;
property LineSelect;
property ParentBiDiMode;
property ParentColor;
property ParentFont;
property ParentShowHint;
property Picture;
property PictureProps;
property PopupMenu;
property ReadOnly;
property Revertable;
property ShowCheckboxes;
property ShowItemHints;
property ShowItemImages;
property ShowSizeGrip;
property ShowStatusbar;
property StatusbarAlignment;
property StatusbarColor;
property StatusbarText;
property ShowHint;
property TabOrder;
property TabStop;
property Transparent;
property UseValues;
property Values;
property Visible;
property OnCanResize;
property OnClick;
property OnConstrainedResize;
property OnContextPopup;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnDrawItem;
property OnEndDock;
property OnEndDrag;
property OnEnter;
property OnExit;
property OnHottrack;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMeasureItem;
property OnMouseDown;
property OnMouseEnter;
property OnMouseLeave;
property OnMouseMove;
property OnMouseUp;
property OnPaintHint;
property OnPictureChange;
property OnResize;
property OnShowItemHint;
property OnStartDock;
property OnStartDrag;
end;
implementation
{ TSCCustomDBTrackbar }
procedure TSCCustomDBTrackbar.Assign(Source: TPersistent);
begin
inherited Assign(Source);
if Source is TSCCustomDBTrackbar then
begin
with TSCCustomDBTrackbar(Source) do
begin
Self.DataSource := DataSource;
Self.DataField := DataField;
Self.ReadOnly := ReadOnly;
Self.Values := Values;
end;
end;
end;
procedure TSCCustomDBTrackbar.BeforeExit;
begin
inherited BeforeExit;
if FDataLink <> nil then
begin
try
FDataLink.UpdateRecord;
except
SetFocus;
raise;
end;
end;
end;
function TSCCustomDBTrackbar.CanSetUserValue(var Value: Integer): Boolean;
begin
Result := CanSetValue(Value);
end;
function TSCCustomDBTrackbar.CanSetValue(var Value: Integer): Boolean;
begin
Result := True;
if (FDataLink <> nil) and (FDataLink.Field <> nil) then
begin
if Readonly then
Result := FChangingData > 0
else
if not (IsDesigning or IsLoading) then
Result := (FChangingData > 0) or FDataLink.Edit;
Exit;
end;
if IsDesigning then
begin
Value := Min;
Exit;
end;
if (FDataLink = nil) or ReadOnly then
Value := Min
else
Result := (FChangingData > 0) or FDataLink.Edit;
end;
procedure TSCCustomDBTrackbar.CMGetDataLink(var Message: TMessage);
begin
Message.Result := Integer(FDataLink);
end;
constructor TSCCustomDBTrackbar.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDataLink := TSCFieldDataLink.Create;
FDataLink.Control := Self;
FDataLink.OnDataChange := DataChange;
FDataLink.OnUpdateData := UpdateData;
FValue := '';
FValues := TStringList.Create;
TStringList(FValues).OnChange := ListChanged;
end;
procedure TSCCustomDBTrackbar.DataChange(Sender: TObject);
begin
Inc(FChangingData);
try
if (FDataLink <> nil) and (FDataLink.Field <> nil) then
Value := FDataLink.Field.Text
else
Value := EmptyStr;
finally
Dec(FChangingData);
end;
end;
destructor TSCCustomDBTrackbar.Destroy;
begin
FreeAndNil(FDataLink);
TStringList(FValues).OnChange := nil;
FreeAndNil(FValues);
inherited Destroy;
end;
procedure TSCCustomDBTrackbar.DoChange;
begin
Value := GetPositionValue(Position);
if (FDataLink <> nil) and FDataLink.Editing then
FDataLink.Modified;
inherited DoChange;
end;
function TSCCustomDBTrackbar.GetDataField: String;
begin
Result := '';
if FDataLink <> nil then
Result := FDataLink.FieldName;
end;
function TSCCustomDBTrackbar.GetDataSource: TDataSource;
begin
Result := nil;
if FDataLink <> nil then
Result := FDataLink.DataSource;
end;
function TSCCustomDBTrackbar.GetField: TField;
begin
Result := nil;
if FDataLink <> nil then
Result := FDataLink.Field;
end;
function TSCCustomDBTrackbar.GetPosition: Integer;
var
S: String;
I: Integer;
begin
Result := inherited GetPosition;
if not IsDesigning and (csPaintCopy in ControlState) then
begin
S := EmptyStr;
if (FDataLink <> nil) and (FDataLink.Field <> nil) then
S := FDataLink.Field.Text;
if GetPositionValue(Result) <> S then
begin
I := GetValuePosition(S);
if I <> -Maxint then
Result := I;
end;
end;
end;
function TSCCustomDBTrackbar.GetPositionValue(Index: Integer): String;
begin
Dec(Index, Min);
Result := '';
if (Index > -1) and (Index < FValues.Count) and (FValues[Index] <> '') then
Result := FValues[Index]
else if (Index >= 0) and (Index <= Max - Min) then
begin
Inc(Index, Min);
Result := IntToStr(Index);
end;
end;
function TSCCustomDBTrackbar.GetReadOnly: Boolean;
begin
Result := (FDataLink = nil) or FDataLink.ReadOnly;
end;
function TSCCustomDBTrackbar.GetValue: String;
begin
Result := FValue;
end;
function TSCCustomDBTrackbar.GetValuePosition(Value: String): Integer;
var
I: Integer;
begin
for I := 0 to FValues.Count-1 do
if FValues[I] = Value then
begin
Result := I + Min;
Exit;
end;
Result := StrToIntDef(Value, -Maxint);
if Result <> -Maxint then
begin
if Result < Min then
Result := Min
else if Result > Max then
Result := Max;
end;
end;
procedure TSCCustomDBTrackbar.KeyPress(var Key: Char);
begin
inherited;
if (FDataLink <> nil) and (Key = #27) then
FDataLink.Reset;
end;
procedure TSCCustomDBTrackbar.ListChanged(Sender: TObject);
var
Cnt: Integer;
begin
Cnt := FValues.Count;
if Cnt > 0 then Max := Min + Cnt - 1;
end;
procedure TSCCustomDBTrackbar.Notification(AComponent: TComponent;
Operation: TOperation);
begin
inherited Notification(AComponent, Operation);
if (Operation = opRemove) and (FDataLink <> nil) and
(AComponent = DataSource) then DataSource := nil;
end;
procedure TSCCustomDBTrackbar.SetDataField(const Value: String);
begin
if FDataLink <> nil then
FDataLink.FieldName := Value;
end;
procedure TSCCustomDBTrackbar.SetDataSource(Value: TDataSource);
begin
if (FDataLink <> nil) and
not (FDataLink.DataSourceFixed and IsLoading) then
begin
{$IFDEF SC_DELPHI5_UP}
if FDataLink.DataSource <> nil then
FDataLink.DataSource.RemoveFreeNotification(Self);
{$ENDIF}
FDataLink.DataSource := Value;
if Value <> nil then
Value.FreeNotification(Self);
end;
end;
procedure TSCCustomDBTrackbar.SetReadOnly(Value: Boolean);
begin
if FDataLink <> nil then
FDataLink.ReadOnly := Value;
end;
procedure TSCCustomDBTrackbar.SetValue(const Value: String);
var
I: Integer;
begin
FValue := Value;
if GetPositionValue(Position) <> Value then
begin
I := GetValuePosition(Value);
if I <> -Maxint then
Position := I;
end;
end;
procedure TSCCustomDBTrackbar.SetValues(Value: TStrings);
begin
FValues.Assign(Value);
Max := Min + FValues.Count - 1;
DataChange(Self);
end;
procedure TSCCustomDBTrackbar.UpdateData(Sender: TObject);
begin
if (FDataLink <> nil) and (FDataLink.Field <> nil) then
FDataLink.Field.Text := Value;
end;
{ TSCCustomDBProgress }
procedure TSCCustomDBProgress.Assign(Source: TPersistent);
begin
inherited Assign(Source);
if Source is TSCCustomDBProgress then
begin
with TSCCustomDBProgress(Source) do
begin
Self.DataSource := DataSource;
Self.DataField := DataField;
Self.ReadOnly := ReadOnly;
Self.Values := Values;
end;
end;
end;
procedure TSCCustomDBProgress.BeforeExit;
begin
inherited BeforeExit;
if FDataLink <> nil then
begin
try
FDataLink.UpdateRecord;
except
SetFocus;
raise;
end;
end;
end;
function TSCCustomDBProgress.CanSetValue(var Value: Integer): Boolean;
begin
Result := True;
if (FDataLink <> nil) and (FDataLink.Field <> nil) then
begin
if Readonly then
Result := FChangingData > 0
else
if not (IsDesigning or IsLoading) then
Result := (FChangingData > 0) or FDataLink.Edit;
Exit;
end;
if IsDesigning then
begin
Value := Min;
Exit;
end;
if (FDataLink = nil) or ReadOnly then
Value := Min
else
Result := (FChangingData > 0) or FDataLink.Edit;
end;
procedure TSCCustomDBProgress.CMGetDataLink(var Message: TMessage);
begin
Message.Result := Integer(FDataLink);
end;
constructor TSCCustomDBProgress.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDataLink := TSCFieldDataLink.Create;
FDataLink.Control := Self;
FDataLink.OnDataChange := DataChange;
FDataLink.OnUpdateData := UpdateData;
FValue := '';
FValues := TStringList.Create;
TStringList(FValues).OnChange := ListChanged;
end;
procedure TSCCustomDBProgress.DataChange(Sender: TObject);
begin
Inc(FChangingData);