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unit UpDownEdit;interface uses Windows, SysUtils, Classes, Controls, StdCtrls, ComCtrls, Messages; type TUpDownEdit = class(TCustomControl) private { Private declarations } UpDown: TUpDown; Edit: TEdit; FMin: Integer; FMax: Integer; FOnChange: TNotifyEvent; FPosition: Integer; procedure WMSize(var Msg: TWMSize); message wm_Size; procedure SetMax(const Value: Integer); procedure SetMin(const Value: Integer); procedure EditChange(Sender: TObject); procedure EditKeyPress(Sender: TObject; var Key: Char); procedure UpDownClick(Sender: TObject; Button: TUDBtnType); procedure SetPosition(const Value: Integer); protected { Protected declarations } public { Public declarations } constructor Create(AOwner: TComponent); override; destructor Destroy; override; published { Published declarations } property Max: Integer read FMax write SetMax; property Min: Integer read FMin write SetMin; property Position: Integer read FPosition write SetPosition; property OnChange: TNotifyEvent read FOnChange write FOnChange; end; procedure Register; implementation procedure Register;begin RegisterComponents('Standard', [TUpDownEdit]);end; { TUpDownEdit } constructor TUpDownEdit.Create(AOwner: TComponent);begin inherited Create(AOwner); SetBounds(0, 0, 57, 21); Edit := TEdit.Create(Self); Edit.Left := 0; Edit.Top := 0; Edit.Width := 40; Edit.Align := alLeft; Edit.Parent := self; Edit.Text := '0';// SetWindowLong(Edit.Handle, GWL_STYLE, GetWindowLong(Edit.Handle, GWL_STYLE) or ES_NUMBER); UpDown := TUpDown.Create(self); UpDown.Height := Height; //20; UpDown.Width := 14; UpDown.Left := Edit.Width + 1; UpDown.Parent := self; FMin := 0; FMax := 100; Edit.OnChange := EditChange; Edit.OnKeyPress := EditKeyPress; UpDown.OnClick := UpDownClick;end; destructor TUpDownEdit.Destroy;begin Edit.Free; UpDown.Free; inherited;end; procedure TUpDownEdit.EditChange(Sender: TObject);begin UpDown.Position := StrToIntDef(Edit.Text, 0); FPosition := UpDown.Position; if Assigned(FOnChange) then FOnChange(Self);end; procedure TUpDownEdit.EditKeyPress(Sender: TObject; var Key: Char);var s: set of char; i: integer; Str, Text: string;begin s := [#8, '0'..'9']; if Key = #8 then exit; if not (Key in s) then begin Key := #0; Exit; end; //控制输入数字的大小 if TEdit(Sender).SelLength 0 then begin Text := TEdit(Sender).Text; Str := Copy(Text, 1, TEdit(Sender).SelStart - 1) + Key + Copy(Text, TEdit(Sender).SelStart + TEdit(Sender).SelLength + 1, Length(Text)); i := StrToInt(Str); if i FMax then begin Key := #0; Exit; end; end else if StrToInt(TEdit(Sender).Text + Key) FMax then begin Key := #0; Exit; end else if StrToInt(TEdit(Sender).Text + Key) FMin then begin Key := #0; Exit; end; end; procedure TUpDownEdit.SetMax(const Value: Integer);begin FMax := Value; UpDown.Max := FMax; if StrToIntDef(Edit.Text, 0) FMax then begin UpDown.Position := FMax; Edit.Text := IntToStr(FMax); FPosition := UpDown.Position; end;end; procedure TUpDownEdit.SetMin(const Value: Integer);begin FMin := Value; UpDown.Min := FMin; if StrToIntDef(Edit.Text, 0) FMin then begin UpDown.Position := FMin; Edit.Text := IntToStr(FMin); FPosition := UpDown.Position; if Assigned(FOnChange) then FOnChange(Self); end;end; procedure TUpDownEdit.SetPosition(const Value: Integer);begin if (Value = FMin) or (Value = FMax) then begin FPosition := Value; UpDown.Position := FPosition; Edit.Text := IntToStr(FPosition); if Assigned(FOnChange) then FOnChange(Self); end;end; procedure TUpDownEdit.UpDownClick(Sender: TObject; Button: TUDBtnType);begin if Max = 0 then begin Max := 100; UpDown.Max := Max; end; UpDown.Min := Min; Edit.Text := IntToStr(UpDown.Position); Edit.SetFocus; Edit.SelectAll; if Assigned(FOnChange) then FOnChange(Self); FPosition := UpDown.Position;end; procedure TUpDownEdit.WMSize(var Msg: TWMSize);begin Edit.Width := Width - 15; UpDown.Left := Edit.Width + 1; UpDown.Height := Height; inherited; end; end. 
