unit JvDBLabeledEdit;

interface

uses
  Windows, Messages, SysUtils, Classes, Controls, StdCtrls, ExtCtrls,
  Mask, DBCtrls;

type
  TJvBoundLabel = class(TBoundLabel)
  published
    property Autosize;
    property Alignment;
  end;

  TJvCustomDBLabeledEdit = class(TDBEdit)
  private
    FEditLabel: TJvBoundLabel;
    FLabelPosition: TLabelPosition;
    FLabelSpacing: Integer;
    procedure SetLabelPosition(const Value: TLabelPosition);
    procedure SetLabelSpacing(const Value: Integer);
  protected
    procedure SetParent(AParent: TWinControl); override;
    procedure Notification(AComponent: TComponent; Operation: TOperation); override;
    procedure SetName(const Value: TComponentName); override;
    procedure CMVisiblechanged(var Message: TMessage);
      message CM_VISIBLECHANGED;
    procedure CMEnabledchanged(var Message: TMessage);
      message CM_ENABLEDCHANGED;
    procedure CMBidimodechanged(var Message: TMessage);
      message CM_BIDIMODECHANGED;
  public
    { Public declarations }
    constructor Create(AOwner: TComponent); override;
    procedure SetBounds(ALeft: Integer; ATop: Integer; AWidth: Integer; AHeight: Integer); override;
    procedure SetupInternalLabel;
    property EditLabel: TJvBoundLabel read FEditLabel;
    property LabelPosition: TLabelPosition read FLabelPosition write SetLabelPosition;
    property LabelSpacing: Integer read FLabelSpacing write SetLabelSpacing;
  end;

  TJvDBLabeledEdit = class(TJvCustomDBLabeledEdit)
  published
    property Anchors;
    property AutoSelect;
    property AutoSize;
    property BevelEdges;
    property BevelInner;
    property BevelKind;
    property BevelOuter;
    property BiDiMode;
    property BorderStyle;
    property CharCase;
    property Color;
    property Constraints;
    property Ctl3D;
    property DragCursor;
    property DragKind;
    property DragMode;
    property EditLabel;
    property Enabled;
    property Font;
    property ImeMode;
    property ImeName;
    property LabelPosition;
    property LabelSpacing;
    property MaxLength;
    property OEMConvert;
    property ParentBiDiMode;
    property ParentColor;
    property ParentCtl3D;
    property ParentFont;
    property ParentShowHint;
    property PasswordChar;
    property PopupMenu;
    property ReadOnly;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    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 OnMouseMove;
    property OnMouseUp;
    property OnStartDock;
    property OnStartDrag;
  end;

implementation

{ TJvCustomDBLabeledEdit }

constructor TJvCustomDBLabeledEdit.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FLabelPosition := lpAbove;
  FLabelSpacing := 3;
  SetupInternalLabel;
end;

procedure TJvCustomDBLabeledEdit.CMBidimodechanged(var Message: TMessage);
begin
  inherited;
  FEditLabel.BiDiMode := BiDiMode;
end;

procedure TJvCustomDBLabeledEdit.CMEnabledchanged(var Message: TMessage);
begin
  inherited;
  FEditLabel.Enabled := Enabled;
end;

procedure TJvCustomDBLabeledEdit.CMVisiblechanged(var Message: TMessage);
begin
  inherited;
  FEditLabel.Visible := Visible;
end;

procedure TJvCustomDBLabeledEdit.Notification(AComponent: TComponent;
  Operation: TOperation);
begin
  inherited Notification(AComponent, Operation);
  if (AComponent = FEditLabel) and (Operation = opRemove) then
    FEditLabel := nil;
end;

procedure TJvCustomDBLabeledEdit.SetBounds(ALeft, ATop, AWidth, AHeight: Integer);
begin
  inherited SetBounds(ALeft, ATop, AWidth, AHeight);
  SetLabelPosition(FLabelPosition);
end;

procedure TJvCustomDBLabeledEdit.SetLabelPosition(const Value: TLabelPosition);
var
  P: TPoint;
begin
  if FEditLabel = nil then exit;
  FLabelPosition := Value;
  case Value of
    lpAbove: P := Point(Left, Top - FEditLabel.Height - FLabelSpacing);
    lpBelow: P := Point(Left, Top + Height + FLabelSpacing);
    lpLeft : P := Point(Left - FEditLabel.Width - FLabelSpacing,
                    Top + ((Height - FEditLabel.Height) div 2));
    lpRight: P := Point(Left + Width + FLabelSpacing,
                    Top + ((Height - FEditLabel.Height) div 2));
  end;
  FEditLabel.SetBounds(P.x, P.y, FEditLabel.Width, FEditLabel.Height);
end;

procedure TJvCustomDBLabeledEdit.SetLabelSpacing(const Value: Integer);
begin
  FLabelSpacing := Value;
  SetLabelPosition(FLabelPosition);
end;

procedure TJvCustomDBLabeledEdit.SetName(const Value: TComponentName);
begin
  if (csDesigning in ComponentState) and ((FEditlabel.GetTextLen = 0) or
     (CompareText(FEditLabel.Caption, Name) = 0)) then
    FEditLabel.Caption := Value;
  inherited SetName(Value);
  if csDesigning in ComponentState then
    Text := '';
end;

procedure TJvCustomDBLabeledEdit.SetParent(AParent: TWinControl);
begin
  inherited SetParent(AParent);
  if FEditLabel = nil then exit;
  FEditLabel.Parent := AParent;
  FEditLabel.Visible := True;
  FEditLabel.AutoSize := false;
end;

procedure TJvCustomDBLabeledEdit.SetupInternalLabel;
begin
  if Assigned(FEditLabel) then exit;
  FEditLabel := TJvBoundLabel.Create(Self);
  FEditLabel.FreeNotification(Self);
end;

end.