tflatspineditunit.pas

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  else
    Value := GetValue - FIncrement;
end;

procedure TFlatSpinEditInteger.WMPaste (var Message: TWMPaste);
begin
  if not FEditorEnabled or ReadOnly then
    Exit;
  inherited;
end;

procedure TFlatSpinEditInteger.WMCut (var Message: TWMPaste);
begin
  if not FEditorEnabled or ReadOnly then
    Exit;
  inherited;
end;

procedure TFlatSpinEditInteger.CMExit (var Message: TCMExit);
begin
  inherited;
  if CheckValue(Value) <> Value then
    SetValue(Value);
end;

function TFlatSpinEditInteger.GetValue: LongInt;
begin
  try
    Result := StrToInt(Text);
  except
    Result := FMinValue;
  end;
end;

procedure TFlatSpinEditInteger.SetValue (NewValue: LongInt);
begin
  Text := IntToStr(CheckValue(NewValue));
end;

function TFlatSpinEditInteger.CheckValue (NewValue: LongInt): LongInt;
begin
  Result := NewValue;
  if (FMaxValue <> FMinValue) then
  begin
    if NewValue < FMinValue then
      Result := FMinValue
    else
      if NewValue > FMaxValue then
        Result := FMaxValue;
  end;
end;

procedure TFlatSpinEditInteger.CMEnter (var Message: TCMGotFocus);
begin
  if AutoSelect and not (csLButtonDown in ControlState) then
    SelectAll;
  inherited;
end;

procedure TFlatSpinEditInteger.Loaded;
begin
  SetEditRect;
  FButton.SetBounds(Width - FButton.Width - 5, 0, FButton.Width, Height - 6);
  inherited;
end;

procedure TFlatSpinEditInteger.CreateWnd;
begin
  inherited;
  SetEditRect;
  FButton.SetBounds(Width - FButton.Width - 5, 0, FButton.Width, Height - 6);
end;

{ TFlatSpinEditFloat }

constructor TFlatSpinEditFloat.Create (AOwner: TComponent);
begin
  inherited Create(AOwner);
  FButton := TSpinButton.Create (Self);
  FButton.Parent := Self;
  FButton.Width := 22;
  FButton.Height := 10;
  FButton.Visible := True;
  FButton.FocusControl := Self;
  FButton.OnUpClick := UpClick;
  FButton.OnDownClick := DownClick;
  Text := '0' + DecimalSeparator + '00';
  ControlStyle := ControlStyle - [csSetCaption];
  FIncrement := 0.5;
  FEditorEnabled := True;
  FDigits := 2;
  FPrecision := 9;
end;

destructor TFlatSpinEditFloat.Destroy;
begin
  FButton := nil;
  inherited Destroy;
end;

procedure TFlatSpinEditFloat.KeyDown(var Key: Word; Shift: TShiftState);
begin
  case Key of
    VK_UP:
      UpClick(Self);
    VK_DOWN:
      DownClick(Self);
  end;
  inherited KeyDown(Key, Shift);
end;

procedure TFlatSpinEditFloat.KeyPress(var Key: Char);
begin
  if not IsValidChar(Key) then
  begin
    Key := #0;
    MessageBeep(0)
  end;
  if Key <> #0 then
    inherited KeyPress(Key);
end;

function TFlatSpinEditFloat.IsValidChar(Key: Char): Boolean;
begin
  Result := (Key in [DecimalSeparator, '+', '-', '0'..'9']) or ((Key < #32) and (Key <> Chr(VK_RETURN)));
  if not FEditorEnabled and Result and ((Key >= #32) or (Key = Char(VK_BACK)) or (Key = Char(VK_DELETE))) then
    Result := False;
end;

procedure TFlatSpinEditFloat.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  Params.Style := Params.Style or ES_MULTILINE or WS_CLIPCHILDREN;
end;

procedure TFlatSpinEditFloat.SetEditRect;
var
  Loc: TRect;
begin
  SendMessage(Handle, EM_GETRECT, 0, LongInt(@Loc));
  Loc := Rect(0, 0, ClientWidth - FButton.Width - 3, ClientHeight);
  SendMessage(Handle, EM_SETRECTNP, 0, LongInt(@Loc));
  SendMessage(Handle, EM_GETRECT, 0, LongInt(@Loc));
end;

procedure TFlatSpinEditFloat.WMSize(var Message: TWMSize);
var
  MinHeight: Integer;
begin
  inherited;
  MinHeight := GetMinHeight;
  { text edit bug: if size to less than minheight, then edit ctrl does
    not display the text }
  if Height < MinHeight then
    Height := MinHeight
  else
    if FButton <> nil then
    begin
      FButton.SetBounds(Width - FButton.Width - 5, 0, FButton.Width, Height - 6);
      SetEditRect;
    end;
end;

function TFlatSpinEditFloat.GetMinHeight: Integer;
var
  DC: HDC;
  SaveFont: HFont;
  SysMetrics, Metrics: TTextMetric;
begin
  DC := GetDC(0);
  GetTextMetrics(DC, SysMetrics);
  SaveFont := SelectObject(DC, Font.Handle);
  GetTextMetrics(DC, Metrics);
  SelectObject(DC, SaveFont);
  ReleaseDC(0, DC);
  Result := Metrics.tmHeight + 7;
end;

procedure TFlatSpinEditFloat.UpClick(Sender: TObject);
begin
  if ReadOnly then
    MessageBeep(0)
  else
    Value := Value + FIncrement;
end;

procedure TFlatSpinEditFloat.DownClick(Sender: TObject);
begin
  if ReadOnly then
    MessageBeep(0)
  else
    Value := Value - FIncrement;
end;

procedure TFlatSpinEditFloat.WMPaste(var Message: TWMPaste);
begin
  if not FEditorEnabled or ReadOnly then
    Exit;
  inherited;
end;

procedure TFlatSpinEditFloat.WMCut(var Message: TWMPaste);
begin
  if not FEditorEnabled or ReadOnly then
    Exit;
  inherited;
end;

procedure TFlatSpinEditFloat.CMExit(var Message: TCMExit);
begin
  inherited;
  if CheckValue(Value) <> Value then
    SetValue(Value);
end;

function TFlatSpinEditFloat.GetValue: Extended;
var
  s: string;
begin
  try
    s := Text;
    while Pos(CurrencyString, S) > 0 do
      Delete(S, Pos(CurrencyString, S), Length(CurrencyString));
    while Pos(' ', S) > 0 do
      Delete(S, Pos(' ', S), 1);
    while Pos(ThousandSeparator, S) > 0 do
      Delete(S, Pos(ThousandSeparator, S), Length(ThousandSeparator));

    //Delete negative numbers in format Currency
    if Pos('(', S) > 0 then
    begin
      Delete(S, Pos('(', S), 1);
      if Pos(')', S) > 0 then
        Delete(S, Pos(')', S), 1);
      Result := StrToFloat(S)*-1;
    end
    else
      Result := StrToFloat(S);
  except
    Result := FMinValue;
  end;
end;

procedure TFlatSpinEditFloat.SetFloatFormat(Value: TFloatFormat);
begin
  FFloatFormat := Value;
  Text := FloatToStrF(CheckValue(GetValue), FloatFormat, Precision, Digits);
end;

procedure TFlatSpinEditFloat.SetDigits(Value: Integer);
begin
  FDigits := Value;
  Text := FloatToStrF(CheckValue(GetValue), FloatFormat, Precision, Digits);
end;

procedure TFlatSpinEditFloat.SetPrecision(Value: Integer);
begin
  FPrecision := Value;
  Text := FloatToStrF(CheckValue(GetValue), FloatFormat, Precision, Digits);
end;

procedure TFlatSpinEditFloat.SetValue(Value: Extended);
begin
  Text := FloatToStrF(CheckValue(Value), FloatFormat, Precision, Digits);
end;

function TFlatSpinEditFloat.CheckValue(Value: Extended): Extended;
begin
  Result := Value;
  if (FMaxValue <> FMinValue) then
  begin
    if Value < FMinValue then
      Result := FMinValue
    else
      if Value > FMaxValue then
        Result := FMaxValue;
  end;
end;

procedure TFlatSpinEditFloat.CMEnter(var Message: TCMGotFocus);
begin
  if AutoSelect and not (csLButtonDown in ControlState) then
    SelectAll;
  inherited;
end;

procedure TFlatSpinEditFloat.Loaded;
begin
  SetEditRect;
  FButton.SetBounds(Width - FButton.Width - 5, 0, FButton.Width, Height - 6);
  inherited;
end;

procedure TFlatSpinEditFloat.CreateWnd;
begin
  inherited;
  SetEditRect;
  FButton.SetBounds(Width - FButton.Width - 5, 0, FButton.Width, Height - 6);
end;

end.