Delphi自带的SpinEdit控件太丑了，自己写一个替换它

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;

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;

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;

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;

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.