rxspin.pas

rxlib2.75控件包

end;
{$ENDIF WIN32}

function TRxSpinEdit.GetButtonWidth: Integer;
begin
{$IFDEF WIN32}
  if FUpDown <> nil then Result := FUpDown.Width else
{$ENDIF}
  if FButton <> nil then Result := FButton.Width
  else Result := DefBtnWidth;
end;

procedure TRxSpinEdit.ResizeButton;
{$IFDEF WIN32}
var
  R: TRect;
{$ENDIF}
begin
{$IFDEF WIN32}
  if FUpDown <> nil then begin
    FUpDown.Width := DefBtnWidth;
 {$IFDEF RX_D4}
    if (BiDiMode = bdRightToLeft) then FUpDown.Align := alLeft else
 {$ENDIF}
    FUpDown.Align := alRight;
  end
  else if FButton <> nil then begin { bkDiagonal }
    if NewStyleControls and Ctl3D and (BorderStyle = bsSingle) then
      R := Bounds(Width - Height - 1, -1, Height - 3, Height - 3)
    else
      R := Bounds(Width - Height, 0, Height, Height);
 {$IFDEF RX_D4}
    if (BiDiMode = bdRightToLeft) then begin
      if NewStyleControls and Ctl3D and (BorderStyle = bsSingle) then begin
        R.Left := -1;
        R.Right := Height - 4;
      end
      else begin
        R.Left := 0;
        R.Right := Height;
      end;
    end;
 {$ENDIF}
    with R do
      FBtnWindow.SetBounds(Left, Top, Right - Left, Bottom - Top);
    FButton.SetBounds(0, 0, FBtnWindow.Width, FBtnWindow.Height);
  end;
{$ELSE}
  if FButton <> nil then begin
    FBtnWindow.SetBounds(Width - Height, 0, Height, Height);
    FButton.SetBounds(0, 0, FBtnWindow.Width, FBtnWindow.Height);
  end;
{$ENDIF}
end;

procedure TRxSpinEdit.KeyDown(var Key: Word; Shift: TShiftState);
begin
  inherited KeyDown(Key, Shift);
  if ArrowKeys and (Key in [VK_UP, VK_DOWN]) then begin
    if Key = VK_UP then UpClick(Self)
    else if Key = VK_DOWN then DownClick(Self);
    Key := 0;
  end;
end;

procedure TRxSpinEdit.Change;
begin
  if not FChanging then inherited Change;
end;

procedure TRxSpinEdit.KeyPress(var Key: Char);
begin
  if not IsValidChar(Key) then begin
    Key := #0;
    MessageBeep(0)
  end;
  if Key <> #0 then begin
    inherited KeyPress(Key);
    if (Key = Char(VK_RETURN)) or (Key = Char(VK_ESCAPE)) then begin
      { must catch and remove this, since is actually multi-line }
      GetParentForm(Self).Perform(CM_DIALOGKEY, Byte(Key), 0);
      if Key = Char(VK_RETURN) then Key := #0;
    end;
  end;
end;

function TRxSpinEdit.IsValidChar(Key: Char): Boolean;
var
  ValidChars: set of Char;
begin
  ValidChars := ['+', '-', '0'..'9'];
  if ValueType = vtFloat then begin
    if Pos(DecimalSeparator, Text) = 0 then
      ValidChars := ValidChars + [DecimalSeparator];
    if Pos('E', AnsiUpperCase(Text)) = 0 then
      ValidChars := ValidChars + ['e', 'E'];
  end
  else if ValueType = vtHex then begin
    ValidChars := ValidChars + ['A'..'F', 'a'..'f'];
  end;
  Result := (Key in ValidChars) or (Key < #32);
  if not FEditorEnabled and Result and ((Key >= #32) or
    (Key = Char(VK_BACK)) or (Key = Char(VK_DELETE))) then Result := False;
end;

procedure TRxSpinEdit.CreateParams(var Params: TCreateParams);
const
{$IFDEF RX_D4}
  Alignments: array[Boolean, TAlignment] of DWORD =
    ((ES_LEFT, ES_RIGHT, ES_CENTER), (ES_RIGHT, ES_LEFT, ES_CENTER));
{$ELSE}
  Alignments: array[TAlignment] of Longint = (ES_LEFT, ES_RIGHT, ES_CENTER);
{$ENDIF}
begin
  inherited CreateParams(Params);
  Params.Style := Params.Style or ES_MULTILINE or WS_CLIPCHILDREN or
{$IFDEF RX_D4}
    Alignments[UseRightToLeftAlignment, FAlignment];
{$ELSE}
    Alignments[FAlignment];
{$ENDIF}
end;

procedure TRxSpinEdit.CreateWnd;
begin
  inherited CreateWnd;
  SetEditRect;
end;

procedure TRxSpinEdit.SetEditRect;
var
  Loc: TRect;
begin
{$IFDEF RX_D4}
  if (BiDiMode = bdRightToLeft) then
    SetRect(Loc, GetButtonWidth + 1, 0, ClientWidth - 1,
      ClientHeight + 1) else
{$ENDIF RX_D4}
  SetRect(Loc, 0, 0, ClientWidth - GetButtonWidth - 2, ClientHeight + 1);
  SendMessage(Handle, EM_SETRECTNP, 0, Longint(@Loc));
end;

procedure TRxSpinEdit.SetAlignment(Value: TAlignment);
begin
  if FAlignment <> Value then begin
    FAlignment := Value;
    RecreateWnd;
  end;
end;

procedure TRxSpinEdit.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 begin
    ResizeButton;
    SetEditRect;
  end;
end;

procedure TRxSpinEdit.GetTextHeight(var SysHeight, Height: 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);
  SysHeight := SysMetrics.tmHeight;
  Height := Metrics.tmHeight;
end;

function TRxSpinEdit.GetMinHeight: Integer;
var
  I, H: Integer;
begin
  GetTextHeight(I, H);
  if I > H then I := H;
  Result := H + {$IFNDEF WIN32} (I div 4) + {$ENDIF}
    (GetSystemMetrics(SM_CYBORDER) * 4) + 1;
end;

procedure TRxSpinEdit.UpClick(Sender: TObject);
var
  OldText: string;
begin
  if ReadOnly then MessageBeep(0)
  else begin
    FChanging := True;
    try
      OldText := inherited Text;
      Value := Value + FIncrement;
    finally
      FChanging := False;
    end;
    if CompareText(inherited Text, OldText) <> 0 then begin
      Modified := True;
      Change;
    end;
    if Assigned(FOnTopClick) then FOnTopClick(Self);
  end;
end;

procedure TRxSpinEdit.DownClick(Sender: TObject);
var
  OldText: string;
begin
  if ReadOnly then MessageBeep(0)
  else begin
    FChanging := True;
    try
      OldText := inherited Text;
      Value := Value - FIncrement;
    finally
      FChanging := False;
    end;
    if CompareText(inherited Text, OldText) <> 0 then begin
      Modified := True;
      Change;
    end;
    if Assigned(FOnBottomClick) then FOnBottomClick(Self);
  end;
end;

{$IFDEF RX_D4}
procedure TRxSpinEdit.CMBiDiModeChanged(var Message: TMessage);
begin
  inherited;
  ResizeButton;
  SetEditRect;
end;
{$ENDIF}

procedure TRxSpinEdit.CMFontChanged(var Message: TMessage);
begin
  inherited;
  ResizeButton;
  SetEditRect;
end;

procedure TRxSpinEdit.CMCtl3DChanged(var Message: TMessage);
begin
  inherited;
  ResizeButton;
  SetEditRect;
end;

procedure TRxSpinEdit.CMEnabledChanged(var Message: TMessage);
begin
  inherited;
{$IFDEF WIN32}
  if FUpDown <> nil then begin
    FUpDown.Enabled := Enabled;
    ResizeButton;
  end;
{$ENDIF}
  if FButton <> nil then FButton.Enabled := Enabled;
end;

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

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

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

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

function TRxSpinEdit.GetValue: Extended;
begin
  try
    if ValueType = vtFloat then Result := StrToFloat(Text)
    else if ValueType = vtHex then Result := StrToInt('$' + Text)
    else Result := StrToInt(Text);
  except
    if ValueType = vtFloat then Result := FMinValue
    else Result := Trunc(FMinValue);
  end;
end;

procedure TRxSpinEdit.SetValue(NewValue: Extended);
begin
  if ValueType = vtFloat then
    Text := FloatToStrF(CheckValue(NewValue), ffFixed, 15, FDecimal)
  else if ValueType = vtHex then
    Text := IntToHex(Round(CheckValue(NewValue)), 1)
  else
    Text := IntToStr(Round(CheckValue(NewValue)));
end;

function TRxSpinEdit.GetAsInteger: Longint;
begin
  Result := Trunc(GetValue);
end;

procedure TRxSpinEdit.SetAsInteger(NewValue: Longint);
begin
  SetValue(NewValue);
end;

procedure TRxSpinEdit.SetValueType(NewType: TValueType);
begin
  if FValueType <> NewType then begin
    FValueType := NewType;
    Value := GetValue;
    if FValueType in [{$IFDEF CBUILDER} vtInt {$ELSE} vtInteger {$ENDIF}, vtHex] then
    begin
      FIncrement := Round(FIncrement);
      if FIncrement = 0 then FIncrement := 1;
    end;
  end;
end;

function TRxSpinEdit.IsIncrementStored: Boolean;
begin
  Result := FIncrement <> 1.0;
end;

function TRxSpinEdit.IsMaxStored: Boolean;
begin
  Result := (MaxValue <> 0.0);
end;

function TRxSpinEdit.IsMinStored: Boolean;
begin
  Result := (MinValue <> 0.0);
end;

function TRxSpinEdit.IsValueStored: Boolean;
begin
  Result := (GetValue <> 0.0);
end;

procedure TRxSpinEdit.SetDecimal(NewValue: Byte);
begin
  if FDecimal <> NewValue then begin
    FDecimal := NewValue;
    Value := GetValue;
  end;
end;

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

end.