{-----------------------------------------------------------------------------
The contents of this file are subject to the Mozilla Public License
Version 1.1 (the "License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/MPL-1.1.html

Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
the specific language governing rights and limitations under the License.

The Original Code is: JvDBLookupTreeView.PAS, released on 2002-07-04.

The Initial Developers of the Original Code are: Andrei Prygounkov <a dott prygounkov att gmx dott de>
Copyright (c) 1999, 2002 Andrei Prygounkov
All Rights Reserved.

Contributor(s):

You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
located at http://jvcl.sourceforge.net

Components:
  TJvDBLookupTreeView,
  TJvDBLookupTreeViewCombo

Description:
  db-aware lookup TreeView

History:
 (JVCL Library versions):
  1.20:
    - first release;
  1.61:
    - support for non-bde components;
  2.01:
    - support for BiDi mode
     (thanks to Oussama Al-Rifai);

Known Issues:
-----------------------------------------------------------------------------}
// $Id: JvDBLookupTreeView.pas 10699 2006-06-10 17:49:41Z obones $

unit JvDBLookupTreeView;

{$I jvcl.inc}

interface

uses
  {$IFDEF UNITVERSIONING}
  JclUnitVersioning,
  {$ENDIF UNITVERSIONING}
  {$IFDEF VCL}
  Windows, Messages,
  {$ENDIF VCL}
  Classes, Controls, Forms, ComCtrls, DB,
  JvDBTreeView, JvToolEdit, JvComponent, JvExControls;

{********************** Borland **********************}

type
  TJvDBLookupControl = class;

  TJvLookupDataSourceLink = class(TDataLink)
  private
    FDBLookupControl: TJvDBLookupControl;
  protected
    procedure FocusControl(Field: TFieldRef); override;
    procedure ActiveChanged; override;
    procedure RecordChanged(Field: TField); override;
  end;

  TJvLookupListSourceLink = class(TDataLink)
  private
    FDBLookupControl: TJvDBLookupControl;
  protected
    procedure ActiveChanged; override;
    procedure DataSetChanged; override;
  end;

  TJvDBLookupControl = class(TJvCustomControl)
  private
    FLookupSource: TDataSource;
    FDataLink: TJvLookupDataSourceLink;
    FListLink: TJvLookupListSourceLink;
    FDataFieldName: string;
    FKeyFieldName: string;
    FListFieldName: string;
    FListFieldIndex: Integer;
    FDataField: TField;
    FMasterField: TField;
    FKeyField: TField;
    FListField: TField;
    FListFields: TList;
    FKeyValue: Variant;
    FUseFilter: Boolean;
    FSearchText: string;
    FLookupMode: Boolean;
    FListActive: Boolean;
    FFocused: Boolean;
    FSearchTickCount: Integer;
    function CanModify: Boolean;
    procedure CheckNotCircular;
    procedure CheckNotLookup;
    procedure DataLinkActiveChanged;
    procedure DataLinkRecordChanged(Field: TField);
    function GetBorderSize: Integer;
    function GetDataSource: TDataSource;
    function GetKeyFieldName: string;
    function GetListSource: TDataSource;
    function GetReadOnly: Boolean;
    function GetTextHeight: Integer;
    procedure KeyValueChanged; virtual;
    procedure ListLinkActiveChanged; virtual;
    procedure ListLinkDataChanged; virtual;
    function LocateKey: Boolean;
    procedure ProcessSearchKey(Key: Char);
    procedure SelectKeyValue(const Value: Variant);
    procedure SetDataFieldName(const Value: string);
    procedure SetDataSource(Value: TDataSource);
    procedure SetKeyFieldName(const Value: string);
    procedure SetKeyValue(const Value: Variant);
    procedure SetListFieldName(const Value: string);
    procedure SetListSource(Value: TDataSource);
    procedure SetLookupMode(Value: Boolean);
    procedure SetReadOnly(Value: Boolean);
    procedure CMGetDataLink(var Msg: TMessage); message CM_GETDATALINK;
  protected
    procedure FocusKilled(NextWnd: THandle); override;
    procedure FocusSet(PrevWnd: THandle); override;
    procedure GetDlgCode(var Code: TDlgCodes); override;
    procedure Notification(AComponent: TComponent;
      Operation: TOperation); override;
    property DataField: string read FDataFieldName write SetDataFieldName;
    property DataSource: TDataSource read GetDataSource write SetDataSource;
    property KeyField: string read GetKeyFieldName write SetKeyFieldName;
    property KeyValue: Variant read FKeyValue write SetKeyValue;
    property ListField: string read FListFieldName write SetListFieldName;
    property ListFieldIndex: Integer read FListFieldIndex write FListFieldIndex default 0;
    property ListSource: TDataSource read GetListSource write SetListSource;
    property UseFilter: Boolean read FUseFilter write FUseFilter;
    property ParentColor default False;
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly default False;
    property TabStop default True;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    property Field: TField read FDataField;
  end;

  TJvTreePopupDataList = class;

  TDropDownAlign = (daLeft, daRight, daCenter);

  TJvDBLookupTreeViewCombo = class(TJvDBLookupControl)
  private
    FDataList: TJvTreePopupDataList;
    FButtonWidth: Integer;
    FText: string;
//    FDropDownRows: Integer;
    FTracking: Boolean;
    FDropDownWidth: Integer;
    FDropDownHeight: Integer;
    FDropDownAlign: TDropDownAlign;
    FListVisible: Boolean;
    FPressed: Boolean;
    FAlignment: TAlignment;
    FLookupMode: Boolean;
    FOnDropDown: TNotifyEvent;
    FOnCloseUp: TNotifyEvent;
    FMasterField: string;      {new}
    FDetailField: string;      {new}
    FIconField: string;        {new}
    FStartMasterValue: string;
    FFullExpand: Boolean; {new}
    procedure KeyValueChanged; override;
    procedure ListLinkActiveChanged; override;
{    procedure ListMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);}
    procedure StopTracking;
    procedure TrackButton(X, Y: Integer);
    procedure CMCtl3DChanged(var Msg: TMessage); message CM_CTL3DCHANGED;
    procedure CMGetDataLink(var Msg: TMessage); message CM_GETDATALINK;
    procedure WMCancelMode(var Msg: TMessage); message WM_CANCELMODE;
    procedure CMCancelMode(var Msg: TCMCancelMode); message CM_CANCELMODE;
    procedure PopupCloseUp(Sender: TObject; Accept: Boolean); virtual;
  private
    FAutoExpand: Boolean;
    FChangeDelay: Integer;
    FHotTrack: Boolean;
    FRowSelect: Boolean;
    FToolTips: Boolean;
    FOnCustomDraw: TTVCustomDrawEvent;
    FOnCustomDrawItem: TTVCustomDrawItemEvent;
    FOnGetImageIndex: TTVExpandedEvent;
  protected
    procedure FontChanged; override;
    procedure FocusKilled(NextWnd: THandle); override;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure Paint; override;
    procedure KeyDown(var Key: Word; Shift: TShiftState); override;
    procedure KeyPress(var Key: Char); override;
    procedure MouseDown(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    procedure MouseMove(Shift: TShiftState; X, Y: Integer); override;
    procedure MouseUp(Button: TMouseButton; Shift: TShiftState;
      X, Y: Integer); override;
    {added by zelen}
    {$IFDEF JVCLThemesEnabled}
    procedure MouseEnter(Control: TControl); override;
    procedure MouseLeave(Control: TControl); override;
    {$ENDIF JVCLThemesEnabled}
    {/added by zelen}
  public
    constructor Create(AOwner: TComponent); override;
    procedure CloseUp(Accept: Boolean);
    procedure DropDown;
    procedure SetBounds(ALeft, ATop, AWidth, AHeight: Integer); override;
    property KeyValue;
    property ListVisible: Boolean read FListVisible;
    property Text: string read FText;
  published
    property AutoSize;
    property Color;
    property DataField;
    property DataSource;
    property DragCursor;
    property DragMode;
    property DropDownAlign: TDropDownAlign read FDropDownAlign write FDropDownAlign default daLeft;
//    property DropDownRows: Integer read FDropDownRows write FDropDownRows default 7;
    property DropDownWidth: Integer read FDropDownWidth write FDropDownWidth default 0;
    {new}
    property DropDownHeight: Integer read FDropDownHeight write FDropDownHeight default 100;

    property Enabled;
    property Font;
    property KeyField;
    property ListField;
    property UseFilter;
    {new}
    property MasterField: string read FMasterField write FMasterField;
    property DetailField: string read FDetailField write FDetailField;
    property IconField: string read FIconField write FIconField;
    property StartMasterValue: string read FStartMasterValue write FStartMasterValue;

    property ListFieldIndex;
    property ListSource;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ReadOnly;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnClick;
    property OnCloseUp: TNotifyEvent read FOnCloseUp write FOnCloseUp;
    property OnDragDrop;
    property OnDragOver;
    property OnDropDown: TNotifyEvent read FOnDropDown write FOnDropDown;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnStartDrag;
    property ImeMode;
    property ImeName;
    property Anchors;
    {$IFDEF COMPILER6_UP}
    property BevelEdges;
    property BevelInner;
    property BevelKind default bkNone;
    property BevelOuter;
    {$ENDIF COMPILER6_UP}
    property BiDiMode;
    property BorderWidth;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
    property OnEndDock;
    property OnStartDock;
    property AutoExpand: Boolean read FAutoExpand write FAutoExpand;
    property ChangeDelay: Integer read FChangeDelay write FChangeDelay;
    property HotTrack: Boolean read FHotTrack write FHotTrack;
    property RowSelect: Boolean read FRowSelect write FRowSelect;
    property ToolTips: Boolean read FToolTips write FToolTips;
    property OnCustomDraw: TTVCustomDrawEvent read FOnCustomDraw write FOnCustomDraw;
    property OnCustomDrawItem: TTVCustomDrawItemEvent read FOnCustomDrawItem write FOnCustomDrawItem;
    property OnGetImageIndex: TTVExpandedEvent read FOnGetImageIndex write FOnGetImageIndex;
    property FullExpand: Boolean read FFullExpand write FFullExpand default False;
  end;

{###################### Borland ######################}

  TJvPopupTree = class(TJvDBTreeView)
  private
    procedure CNNotify(var Msg: TWMNotify); message CN_NOTIFY;
  protected
    procedure FocusSet(PrevWnd: THandle); override;
    procedure DblClick; override;
  end;

  TJvTreePopupDataList = class(TJvPopupWindow)
  private
    FTree: TJvPopupTree;
  protected
    function GetValue: Variant; override;
    procedure SetValue(const Value: Variant); override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;

    function GetPopupText: string; override;
  end;

  TJvDBLookupTreeView = class(TJvDBLookupControl)
  private
    FTree: TJvDBTreeView;
    FBorderStyle: TBorderStyle;
    InKeyValueChanged: Boolean;
    procedure SetBorderStyle(Value: TBorderStyle);
    function GetMasterField: string;
    procedure SetMasterField(Value: string);
    function GetDetailField: string;
    procedure SetDetailField(Value: string);
    function GetStartMasterValue: string;
    procedure SetStartMasterValue(Value: string);
    function GetIconField: string;
    procedure SetIconField(const Value: string);
    procedure KeyValueChanged; override;
   {Tree}
    function GetShowButtons: Boolean;
    function GetShowLines: Boolean;
    function GetShowRoot: Boolean;
    function GetReadOnly: Boolean;
    function GetHideSelection: Boolean;
    function GetIndent: Integer;
    procedure SetShowButtons(Value: Boolean);
    procedure SetShowLines(Value: Boolean);
    procedure SetShowRoot(Value: Boolean);
    procedure SetReadOnly(Value: Boolean);
    procedure SetHideSelection(Value: Boolean);
    procedure SetIndent(Value: Integer);
    function GetRightClickSelect: Boolean;
    procedure SetRightClickSelect(Value: Boolean);
    function GetAutoExpand: Boolean;
    function GetChangeDelay: Integer;
    function GetHotTrack: Boolean;
    function GetOnGetImageIndex: TTVExpandedEvent;
    function GetRowSelect: Boolean;
    function GetToolTips: Boolean;
    procedure SetAutoExpand(const Value: Boolean);
    procedure SetChangeDelay(const Value: Integer);
    procedure SetHotTrack(const Value: Boolean);
    procedure SetOnGetImageIndex(const Value: TTVExpandedEvent);
    procedure SetRowSelect(const Value: Boolean);
    procedure SetToolTips(const Value: Boolean);
    function GetOnCustomDraw: TTVCustomDrawEvent;
    function GetOnCustomDrawItem: TTVCustomDrawItemEvent;
    procedure SetOnCustomDraw(const Value: TTVCustomDrawEvent);
    procedure SetOnCustomDrawItem(const Value: TTVCustomDrawItemEvent);
  protected
    procedure FocusSet(PrevWnd: THandle); override;
    procedure CreateParams(var Params: TCreateParams); override;
    procedure ListLinkActiveChanged; override;
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
  published
    property Align;
    {$IFDEF COMPILER6_UP}
    property BevelEdges;
    property BevelInner;
    property BevelKind default bkNone;
    property BevelOuter;
    {$ENDIF COMPILER6_UP}
    property BorderStyle: TBorderStyle read FBorderStyle write SetBorderStyle default bsSingle;
    property Color;
    property DataField;
    property DataSource;
    property DragCursor;
    property DragMode;
    property Enabled;
    property Font;
    property KeyField;
    property ListField;
    property ListFieldIndex;
    property ListSource;
    property ParentColor;
    property ParentFont;
    property ParentShowHint;
    property PopupMenu;
    property ShowHint;
    property TabOrder;
    property TabStop;
    property Visible;
    property OnClick;
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseDown;
    property OnMouseMove;
    property OnMouseUp;
    property OnStartDrag;
    property ImeMode;
    property ImeName;
    property Anchors;
    property BiDiMode;
    property BorderWidth;
    property Constraints;
    property DragKind;
    property ParentBiDiMode;
    property OnEndDock;
    property OnStartDock;

    property AutoExpand: Boolean read GetAutoExpand write SetAutoExpand;
    property ChangeDelay: Integer read GetChangeDelay write SetChangeDelay;
    property HotTrack: Boolean read GetHotTrack write SetHotTrack;
    property RowSelect: Boolean read GetRowSelect write SetRowSelect;
    property ToolTips: Boolean read GetToolTips write SetToolTips;
    property OnCustomDraw: TTVCustomDrawEvent read GetOnCustomDraw write SetOnCustomDraw;
    property OnCustomDrawItem: TTVCustomDrawItemEvent read GetOnCustomDrawItem write SetOnCustomDrawItem;
    property OnGetImageIndex: TTVExpandedEvent read GetOnGetImageIndex write SetOnGetImageIndex;
    {Tree}
    property MasterField: string read GetMasterField write SetMasterField;
    property DetailField: string read GetDetailField write SetDetailField;
    property IconField: string read GetIconField write SetIconField;
    property StartMasterValue: string read GetStartMasterValue write SetStartMasterValue;
    property ShowButtons: Boolean read GetShowButtons write SetShowButtons;
    property ShowLines: Boolean read GetShowLines write SetShowLines;
    property ShowRoot: Boolean read GetShowRoot write SetShowRoot;
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly;
    property RightClickSelect: Boolean read GetRightClickSelect write SetRightClickSelect;
    property HideSelection: Boolean read GetHideSelection write SetHideSelection;
    property Indent: Integer read GetIndent write SetIndent;
  end;

{$IFDEF UNITVERSIONING}
const
  UnitVersioning: TUnitVersionInfo = (
    RCSfile: '$URL: https://jvcl.svn.sourceforge.net/svnroot/jvcl/tags/JVCL3_32/run/JvDBLookupTreeView.pas $';
    Revision: '$Revision: 10699 $';
    Date: '$Date: 2006-06-10 19:49:41 +0200 (sam., 10 juin 2006) $';
    LogPath: 'JVCL\run'
  );
{$ENDIF UNITVERSIONING}

implementation

uses
  {$IFDEF HAS_UNIT_VARIANTS}
  Variants,
  {$ENDIF HAS_UNIT_VARIANTS}
  {$IFDEF COMPILER6_UP}
  VDBConsts,
  {$ENDIF COMPILER6_UP}
  {$IFDEF COMPILER10_UP}
  Types,  // to allow inline expansion 
  {$ENDIF COMPILER10_UP}
  CommCtrl, Graphics, DBConsts,
  JvThemes;

//=== { TJvLookupDataSourceLink } ============================================

procedure TJvLookupDataSourceLink.ActiveChanged;
begin
  if FDBLookupControl <> nil then
    FDBLookupControl.DataLinkActiveChanged;
end;

procedure TJvLookupDataSourceLink.RecordChanged(Field: TField);
begin
  if FDBLookupControl <> nil then
    FDBLookupControl.DataLinkRecordChanged(Field);
end;

procedure TJvLookupDataSourceLink.FocusControl(Field: TFieldRef);
begin
  if (Field^ <> nil) and (Field^ = FDBLookupControl.Field) and
    (FDBLookupControl <> nil) and FDBLookupControl.CanFocus then
  begin
    Field^ := nil;
    FDBLookupControl.SetFocus;
  end;
end;

procedure TJvLookupListSourceLink.ActiveChanged;
begin
  if FDBLookupControl <> nil then
    FDBLookupControl.ListLinkActiveChanged;
end;

procedure TJvLookupListSourceLink.DataSetChanged;
begin
  if FDBLookupControl <> nil then
    FDBLookupControl.ListLinkDataChanged;
end;

//=== { TJvDBLookupControl } =================================================

function VarEquals(const V1, V2: Variant): Boolean;
begin
  Result := False;
  try
    Result := V1 = V2;
  except
  end;
end;

constructor TJvDBLookupControl.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  if NewStyleControls then
    ControlStyle := [csOpaque]
  else
    ControlStyle := [csOpaque, csFramed];
  IncludeThemeStyle(Self, [csNeedsBorderPaint]);

  ParentColor := False;
  TabStop := True;
  FLookupSource := TDataSource.Create(Self);
  FDataLink := TJvLookupDataSourceLink.Create;
  FDataLink.FDBLookupControl := Self;
  FListLink := TJvLookupListSourceLink.Create;
  FListLink.FDBLookupControl := Self;
  FListFields := TList.Create;
  FKeyValue := Null;
  FSearchTickCount := 0;
end;

destructor TJvDBLookupControl.Destroy;
begin
  FListFields.Free;
  FListLink.FDBLookupControl := nil;
  FListLink.Free;
  FDataLink.FDBLookupControl := nil;
  FDataLink.Free;
  FDataLink := nil;
  inherited Destroy;
end;

function TJvDBLookupControl.CanModify: Boolean;
begin
  Result := FListActive and not ReadOnly and ((FDataLink.DataSource = nil) or
    (FMasterField <> nil) and FMasterField.CanModify);
end;

procedure TJvDBLookupControl.CheckNotCircular;
begin
  if (FDataLink.Active and FDataLink.DataSet.IsLinkedTo(ListSource)) or
    (FListLink.Active and FListLink.DataSet.IsLinkedTo(DataSource)) then
    DatabaseError(SCircularDataLink);
end;

procedure TJvDBLookupControl.CheckNotLookup;
begin
  if FLookupMode then
    DatabaseError(SPropDefByLookup);
  if FDataLink.DataSourceFixed then
    DatabaseError(SDataSourceFixed);
end;

procedure TJvDBLookupControl.DataLinkActiveChanged;
begin
  FDataField := nil;
  FMasterField := nil;
  if FDataLink.Active and (FDataFieldName <> '') then
  begin
    CheckNotCircular;
    FDataField := GetFieldProperty(FDataLink.DataSet, Self, FDataFieldName);
    FMasterField := FDataField;
  end;
  SetLookupMode((FDataField <> nil) and (FDataField.FieldKind = fkLookup));
  DataLinkRecordChanged(nil);
end;

procedure TJvDBLookupControl.DataLinkRecordChanged(Field: TField);
begin
  if (Field = nil) or (Field = FMasterField) then
    if FMasterField <> nil then
      SetKeyValue(FMasterField.Value)
    else
      SetKeyValue(Null);
end;

function TJvDBLookupControl.GetBorderSize: Integer;
var
  Params: TCreateParams;
  R: TRect;
begin
  CreateParams(Params);
  SetRect(R, 0, 0, 0, 0);
  AdjustWindowRectEx(R, Params.Style, False, Params.ExStyle);
  Result := R.Bottom - R.Top;
end;

function TJvDBLookupControl.GetDataSource: TDataSource;
begin
  Result := FDataLink.DataSource;
end;

function TJvDBLookupControl.GetKeyFieldName: string;
begin
  if FLookupMode then
    Result := ''
  else
    Result := FKeyFieldName;
end;

function TJvDBLookupControl.GetListSource: TDataSource;
begin
  if FLookupMode then
    Result := nil
  else
    Result := FListLink.DataSource;
end;

function TJvDBLookupControl.GetReadOnly: Boolean;
begin
  Result := FDataLink.ReadOnly;
end;

function TJvDBLookupControl.GetTextHeight: Integer;
var
  DC: HDC;
  SaveFont: HFont;
  Metrics: TTextMetric;
begin
  DC := GetDC(HWND_DESKTOP);
  SaveFont := SelectObject(DC, Font.Handle);
  GetTextMetrics(DC, Metrics);
  SelectObject(DC, SaveFont);
  ReleaseDC(HWND_DESKTOP, DC);
  Result := Metrics.tmHeight;
end;

procedure TJvDBLookupControl.KeyValueChanged;
begin
end;

procedure TJvDBLookupControl.ListLinkActiveChanged;
var
  DataSet: TDataSet;
  ResultField: TField;
begin
  FListActive := False;
  FKeyField := nil;
  FListField := nil;
  FListFields.Clear;
  if FListLink.Active and (FKeyFieldName <> '') then
  begin
    CheckNotCircular;
    DataSet := FListLink.DataSet;
    FKeyField := GetFieldProperty(DataSet, Self, FKeyFieldName);
    try
      DataSet.GetFieldList(FListFields, FListFieldName);
    except
      DatabaseErrorFmt(SFieldNotFound, [Self.Name, FListFieldName]);
    end;
    if FLookupMode then
    begin
      ResultField := GetFieldProperty(DataSet, Self, FDataField.LookupResultField);
      if FListFields.IndexOf(ResultField) < 0 then
        FListFields.Insert(0, ResultField);
      FListField := ResultField;
    end
    else
    begin
      if FListFields.Count = 0 then
        FListFields.Add(FKeyField);
      if (FListFieldIndex >= 0) and (FListFieldIndex < FListFields.Count) then
        FListField := FListFields[FListFieldIndex]
      else
        FListField := FListFields[0];
    end;
    FListActive := True;
  end;
end;

procedure TJvDBLookupControl.ListLinkDataChanged;
begin
end;

function TJvDBLookupControl.LocateKey: Boolean;
begin
  Result := False;
  try
    if not VarIsNull(FKeyValue) and
      FListLink.DataSet.Locate(FKeyFieldName, FKeyValue, []) then
      Result := True;
  except
  end;
end;

procedure TJvDBLookupControl.Notification(AComponent: TComponent;
  Operation: TOperation);
begin
  inherited Notification(AComponent, Operation);
  if Operation = opRemove then
  begin
    if (FDataLink <> nil) and (AComponent = DataSource) then
      DataSource := nil;
    if (FListLink <> nil) and (AComponent = ListSource) then
      ListSource := nil;
  end;
end;

procedure TJvDBLookupControl.ProcessSearchKey(Key: Char);
var
  TickCount: Integer;
  S: string;
begin
  if (FListField <> nil) and (FListField.FieldKind = fkData) and
    (FListField.DataType = ftString) then
    case Word(Key) of
      VK_BACK, VK_ESCAPE:
        FSearchText := '';
      VK_SPACE..255:
        if CanModify then
        begin
          TickCount := GetTickCount;
          if TickCount - FSearchTickCount > 2000 then
            FSearchText := '';
          FSearchTickCount := TickCount;
          if Length(FSearchText) < 32 then
          begin
            S := FSearchText + Key;
            if FListLink.DataSet.Locate(FListField.FieldName, S,
              [loCaseInsensitive, loPartialKey]) then
            begin
              SelectKeyValue(FKeyField.Value);
              FSearchText := S;
            end;
          end;
        end;
    end;
end;

procedure TJvDBLookupControl.SelectKeyValue(const Value: Variant);
begin
  if FMasterField <> nil then
  begin
    if FDataLink.Edit then
      FMasterField.Value := Value;
  end
  else
    SetKeyValue(Value);
  Repaint;
  Click;
end;

procedure TJvDBLookupControl.SetDataFieldName(const Value: string);
begin
  if FDataFieldName <> Value then
  begin
    FDataFieldName := Value;
    DataLinkActiveChanged;
  end;
end;

procedure TJvDBLookupControl.SetDataSource(Value: TDataSource);
begin
  FDataLink.DataSource := Value;
  if Value <> nil then
    Value.FreeNotification(Self);
end;

procedure TJvDBLookupControl.SetKeyFieldName(const Value: string);
begin
  CheckNotLookup;
  if FKeyFieldName <> Value then
  begin
    FKeyFieldName := Value;
    ListLinkActiveChanged;
  end;
end;

procedure TJvDBLookupControl.SetKeyValue(const Value: Variant);
begin
  if not VarEquals(FKeyValue, Value) then
  begin
    FKeyValue := Value;
    KeyValueChanged;
  end;
end;

procedure TJvDBLookupControl.SetListFieldName(const Value: string);
begin
  if FListFieldName <> Value then
  begin
    FListFieldName := Value;
    ListLinkActiveChanged;
  end;
end;

procedure TJvDBLookupControl.SetListSource(Value: TDataSource);
begin
  CheckNotLookup;
  FListLink.DataSource := Value;
  if Value <> nil then
    Value.FreeNotification(Self);
end;

procedure TJvDBLookupControl.SetLookupMode(Value: Boolean);
begin
  if FLookupMode <> Value then
    if Value then
    begin
      FMasterField := GetFieldProperty(FDataField.DataSet, Self, FDataField.KeyFields);
      FLookupSource.DataSet := FDataField.LookupDataSet;
      FKeyFieldName := FDataField.LookupKeyFields;
      FLookupMode := True;
      FListLink.DataSource := FLookupSource;
    end
    else
    begin
      FListLink.DataSource := nil;
      FLookupMode := False;
      FKeyFieldName := '';
      FLookupSource.DataSet := nil;
      FMasterField := FDataField;
    end;
end;

procedure TJvDBLookupControl.SetReadOnly(Value: Boolean);
begin
  FDataLink.ReadOnly := Value;
end;

procedure TJvDBLookupControl.GetDlgCode(var Code: TDlgCodes);
begin
  Code := [dcWantArrows, dcWantChars];
end;

procedure TJvDBLookupControl.FocusKilled(NextWnd: THandle);
begin
  FFocused := False;
  inherited FocusKilled(NextWnd);
  Invalidate;
end;

procedure TJvDBLookupControl.FocusSet(PrevWnd: THandle);
begin
  FFocused := True;
  inherited FocusSet(PrevWnd);
  Invalidate;
end;

procedure TJvDBLookupControl.CMGetDataLink(var Msg: TMessage);
begin
  Msg.Result := Integer(FDataLink);
end;

//=== { TJvDBLookupTreeViewCombo } ===========================================

constructor TJvDBLookupTreeViewCombo.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  ControlStyle := ControlStyle + [csReplicatable];
  Width := 145;
  Height := 0;
  FDataList := TJvTreePopupDataList.Create(Self);
//  FDataList.Visible := False;
//  FDataList.Parent := Self;
  FButtonWidth := GetSystemMetrics(SM_CXVSCROLL);
  FDropDownHeight := 100;
  FFullExpand := False;
end;

procedure TJvDBLookupTreeViewCombo.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do
    if NewStyleControls and Ctl3D then
      ExStyle := ExStyle or WS_EX_CLIENTEDGE
    else
      Style := Style or WS_BORDER;
end;

procedure TJvDBLookupTreeViewCombo.Paint;
var
  W, X, Flags: Integer;
  Text: string;
  Alignment: TAlignment;
  Selected: Boolean;
  R: TRect;

  {added by zelen}
  {$IFDEF JVCLThemesEnabled}
  State: TThemedComboBox;
  Details: TThemedElementDetails;
  {$ENDIF JVCLThemesEnabled}
  {/added by zelen}

begin
  Canvas.Font := Font;
  Canvas.Brush.Color := Color;
  Selected := FFocused and not FListVisible and not (csPaintCopy in ControlState);

  if Selected then
  begin
    Canvas.Font.Color := clHighlightText;
    Canvas.Brush.Color := clHighlight;
  end
  {added by zelen}
  else
  if not Enabled and NewStyleControls then
    Canvas.Font.Color := clGrayText;
  {/added by zelen}
  if (csPaintCopy in ControlState) and (FDataField <> nil) then
  begin
    Text := FDataField.DisplayText;
    Alignment := FDataField.Alignment;
  end
  else
  begin
    Text := FText;
    Alignment := FAlignment;
  end;
  W := ClientWidth - FButtonWidth;
  X := 2;
  case Alignment of
    taRightJustify: X := W - Canvas.TextWidth(Text) - 3;
    taCenter: X := (W - Canvas.TextWidth(Text)) div 2;
  end;

  // Fill the background (Mantis 2723)
  SetRect(R, 0, 0, W, ClientHeight);
  Canvas.FillRect(R);

  SetRect(R, 1, 1, W - 1, ClientHeight - 1);
  Canvas.TextRect(R, X, 2, Text);
  if Selected then
    Canvas.DrawFocusRect(R);

  SetRect(R, W, 0, ClientWidth, ClientHeight);
  {added by zelen}
  {$IFDEF JVCLThemesEnabled}
  if ThemeServices.ThemesEnabled then
  begin
    if (not FListActive) or (not Enabled) or ReadOnly then
      State := tcDropDownButtonDisabled
    else
    if FPressed then
      State := tcDropDownButtonPressed
    else
    if MouseOver and not FListVisible then
      State := tcDropDownButtonHot
    else
      State := tcDropDownButtonNormal;
    Details := ThemeServices.GetElementDetails(State);
    ThemeServices.DrawElement(Canvas.Handle, Details, R);




  end
  else
  {$ENDIF JVCLThemesEnabled}
  {/added by zelen}  
  begin
    if not FListActive or not Enabled or ReadOnly then
      Flags := DFCS_SCROLLCOMBOBOX or DFCS_INACTIVE
    else
      if FPressed then
      Flags := DFCS_SCROLLCOMBOBOX or DFCS_FLAT or DFCS_PUSHED
    else
      Flags := DFCS_SCROLLCOMBOBOX;
    DrawFrameControl(Canvas.Handle, R, DFC_SCROLL, Flags);
  end;
end;

procedure TJvDBLookupTreeViewCombo.SetBounds(ALeft, ATop, AWidth, AHeight: Integer);
begin
  inherited SetBounds(ALeft, ATop, AWidth, GetTextHeight + GetBorderSize + 4);

end;

procedure TJvDBLookupTreeViewCombo.KeyValueChanged;
begin
  if FLookupMode then
  begin
    FText := FDataField.DisplayText;
    FAlignment := FDataField.Alignment;
  end
  else
  if FListActive and LocateKey then
  begin
    FText := FListField.DisplayText;
    FAlignment := FListField.Alignment;
  end
  else
  begin
    FText := '';
    FAlignment := taLeftJustify;
  end;
  Invalidate;






end;

procedure TJvDBLookupTreeViewCombo.ListLinkActiveChanged;
begin
  inherited ListLinkActiveChanged;
  KeyValueChanged;
end;

procedure TJvDBLookupTreeViewCombo.CloseUp(Accept: Boolean);
var
  ListValue: Variant;
begin
  if FListVisible then
  begin
    if GetCapture <> 0 then
      SendMessage(GetCapture, WM_CANCELMODE, 0, 0);
    ListValue := FDataList.GetValue;
    SetFocus;
    FDataList.Hide;
{    SetWindowPos(FDataList.Handle, 0, 0, 0, 0, 0, SWP_NOZORDER or
      SWP_NOMOVE or SWP_NOSIZE or SWP_NOACTIVATE or SWP_HIDEWINDOW); }
    FListVisible := False;
   // FDataList.ListSource := nil;
    FDataList.FTree.DataSource := nil;
    Invalidate;
    FSearchText := '';
    if Accept and CanModify then
      SelectKeyValue(ListValue);
    if Assigned(FOnCloseUp) then
      FOnCloseUp(Self);
    FPressed := False;
    Repaint;
  end;
end;

procedure TJvDBLookupTreeViewCombo.DropDown;
var
  P: TPoint;
  {I,}Y: Integer;
  {S: string;}
  OldLong: Longword;
begin
  if not FListVisible and FListActive then
  begin
    if Assigned(FOnDropDown) then
      FOnDropDown(Self);
    FDataList.Color := Color;
    FDataList.Font := Font;
    if FDropDownWidth > 0 then
      FDataList.Width := FDropDownWidth
    else
      FDataList.Width := Width;
    FDataList.Height := FDropDownHeight;
   // FDataList.RowCount := FDropDownRows;
   // FDataList.KeyField := FKeyFieldName;
    FDataList.FTree.MasterField := FKeyFieldName;
    FDataList.FTree.DetailField := FDetailField;
    FDataList.FTree.IconField := FIconField;
    FDataList.FTree.MasterField := FMasterField;
    FDataList.FTree.StartMasterValue := FStartMasterValue;
    FDataList.FTree.UseFilter := FUseFilter;

   {Source added by Oussama Al-Rifai}
    OldLong := GetWindowLong(FDataList.FTree.Handle, GWL_EXSTYLE);
    if BiDiMode <> bdLeftToRight then
    begin
      FDataList.FTree.BiDiMode := bdLeftToRight;
      SetWindowLong(FDataList.FTree.Handle, GWL_EXSTYLE, OldLong or $00400000);
    end
    else
      SetWindowLong(FDataList.FTree.Handle, GWL_EXSTYLE, OldLong and not $00400000);
   {End of source added by Oussama Al-Rifai}

    FDataList.FTree.AutoExpand := FAutoExpand;
    FDataList.FTree.ChangeDelay := FChangeDelay;
    FDataList.FTree.HotTrack := FHotTrack;
    FDataList.FTree.RowSelect := FRowSelect;
    FDataList.FTree.ToolTips := FToolTips;
    FDataList.FTree.OnCustomDraw := FOnCustomDraw;
    FDataList.FTree.OnCustomDrawItem := FOnCustomDrawItem;
    FDataList.FTree.OnGetImageIndex := FOnGetImageIndex;
    FDataList.FTree.ReadOnly := not FDataLink.ReadOnly;

   { for I := 0 to FListFields.Count - 1 do
      S := S + TField(FListFields[I]).FieldName + ';';
    FDataList.ListField := S;}
    FDataList.FTree.ItemField := ListField;

   // FDataList.ListFieldIndex := FListFields.IndexOf(FListField);
   // FDataList.ListSource := FListLink.DataSource;
    FDataList.FTree.DataSource := FListLink.DataSource;
   { FDataList.FTree.FullExpand;
    FDataList.FTree.FullCollapse;
    FDataList.FTree.DataChanged; }
    FDataList.SetValue(FListLink.DataSet.Lookup(FKeyFieldName, FKeyValue, FMasterField));

   // FDataList.KeyValue := KeyValue;

    P := Parent.ClientToScreen(Point(Left, Top));
    Y := P.Y + Height;
    if Y + FDataList.Height > Screen.Height then
      Y := P.Y - FDataList.Height;
    case FDropDownAlign of
      daRight: Dec(P.X, FDataList.Width - Width);
      daCenter: Dec(P.X, (FDataList.Width - Width) div 2);
    end;
//    FDataList.Left := P.X;
//    FDataList.Top := P.Y;
    P.Y := Y;
    FListVisible := True;
    FDataList.Show(P);
//    FDataList.Visible := True;
//    SetWindowPos(FDataList.Handle, HWND_TOP, P.X, Y, 0, 0,
//      SWP_NOSIZE or SWP_NOACTIVATE or SWP_SHOWWINDOW);

    if FullExpand then
      FDataList.FTree.FullExpand; 

    Repaint;
  end;
end;

procedure TJvDBLookupTreeViewCombo.KeyDown(var Key: Word; Shift: TShiftState);
var
  Delta: Integer;
begin
  inherited KeyDown(Key, Shift);
  if FListActive and ((Key = VK_UP) or (Key = VK_DOWN)) then
    if ssAlt in Shift then
    begin
      if FListVisible then
        CloseUp(True)
      else
        DropDown;
      Key := 0;
    end
    else
    if not FListVisible then
    begin
      if not LocateKey then
        FListLink.DataSet.First
      else
      begin
        if Key = VK_UP then
          Delta := -1
        else
          Delta := 1;
        FListLink.DataSet.MoveBy(Delta);
      end;
      SelectKeyValue(FKeyField.Value);
      Key := 0;
    end;
  if (Key <> 0) and FListVisible then
    // FDataList.KeyDown(Key, Shift);
    SendMessage(FDataList.FTree.Handle, WM_KEYDOWN, Key, 0);
end;

procedure TJvDBLookupTreeViewCombo.KeyPress(var Key: Char);
begin
  inherited KeyPress(Key);
  if FListVisible then
    if Word(Key) in [VK_RETURN, VK_ESCAPE] then
      CloseUp(Word(Key) = VK_RETURN)
    else
      FDataList.KeyPress(Key)
  else
    ProcessSearchKey(Key);
end;

procedure TJvDBLookupTreeViewCombo.MouseDown(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
begin
  if Button = mbLeft then
  begin
    SetFocus;
    if not FFocused then
      Exit;
    if FListVisible then
      CloseUp(False)
    else
    if FListActive then
    begin
      MouseCapture := True;
      FTracking := True;
      TrackButton(X, Y);
      DropDown;
    end;
  end;
  inherited MouseDown(Button, Shift, X, Y);
end;

procedure TJvDBLookupTreeViewCombo.MouseMove(Shift: TShiftState; X, Y: Integer);
var
  ListPos: TPoint;
  MousePos: TSmallPoint;
begin
  if FTracking then
  begin
    TrackButton(X, Y);
    if FListVisible then
    begin
      ListPos := FDataList.ScreenToClient(ClientToScreen(Point(X, Y)));
      if PtInRect(FDataList.ClientRect, ListPos) then
      begin
        StopTracking;
        MousePos := PointToSmallPoint(ListPos);
        SendMessage(FDataList.FTree.Handle, WM_LBUTTONDOWN, 0, Integer(MousePos));
        Exit;
      end;
    end;
  end;
  inherited MouseMove(Shift, X, Y);
end;

procedure TJvDBLookupTreeViewCombo.MouseUp(Button: TMouseButton; Shift: TShiftState;
  X, Y: Integer);
begin
  StopTracking;
  inherited MouseUp(Button, Shift, X, Y);
end;

procedure TJvDBLookupTreeViewCombo.StopTracking;
begin
  if FTracking then
  begin
    TrackButton(-1, -1);
    FTracking := False;
    MouseCapture := False;
  end;
end;

procedure TJvDBLookupTreeViewCombo.TrackButton(X, Y: Integer);
var
  NewState: Boolean;
begin
  Repaint;
  NewState := PtInRect(Rect(ClientWidth - FButtonWidth, 0, ClientWidth,
    ClientHeight), Point(X, Y));
  if FPressed <> NewState then
  begin
    FPressed := NewState;
    Repaint;
  end;
end;

procedure TJvDBLookupTreeViewCombo.CMCtl3DChanged(var Msg: TMessage);
begin
  if NewStyleControls then
  begin
    RecreateWnd;
    Height := 0;
  end;
  inherited;
end;

procedure TJvDBLookupTreeViewCombo.FontChanged;
begin
  inherited FontChanged;
  Height := 0;
end;

procedure TJvDBLookupTreeViewCombo.CMGetDataLink(var Msg: TMessage);
begin
  Msg.Result := Integer(FDataLink);
end;

procedure TJvDBLookupTreeViewCombo.WMCancelMode(var Msg: TMessage);
begin
  StopTracking;
  inherited;
end;

procedure TJvDBLookupTreeViewCombo.CMCancelMode(var Msg: TCMCancelMode);
begin
  if (Msg.Sender <> Self) and (Msg.Sender <> FDataList) and
     ((FDataList <> nil) and
    not FDataList.ContainsControl(Msg.Sender)) then
      PopupCloseUp(FDataList, False);
end;

procedure TJvDBLookupTreeViewCombo.PopupCloseUp(Sender: TObject;
  Accept: Boolean);
var
  AValue: Variant;
begin
  if (FDataList <> nil) and FListVisible then
  begin
    if GetCapture <> 0 then
      SendMessage(GetCapture, WM_CANCELMODE, 0, 0);
    AValue := FDataList.GetValue;
    FDataList.Hide;
    try
      try
        if CanFocus then
          SetFocus;
      except
        { ignore exceptions }
      end;
//      SetDirectInput(DirectInput);
      Invalidate;
    finally
      FListVisible := False;
    end;
  end;
end;

//=== { TJvTreePopupDataList } ===============================================

constructor TJvTreePopupDataList.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
//  ControlStyle := ControlStyle + [csNoDesignVisible, csReplicatable];
//  TabStop := False;
  FTree := TJvPopupTree.Create(Self);
  FTree.Parent := Self;
  FTree.Align := alClient;
  FTree.ReadOnly := True;
  FTree.BorderStyle := bsNone;
  FTree.HideSelection := False;
  FTree.TabStop := False;
//  FTree.OnDblClick := OnDblClick2;
end;

destructor TJvTreePopupDataList.Destroy;
begin
  FTree.Free;
  inherited Destroy;
end;

function TJvTreePopupDataList.GetPopupText: string;
begin
  Result := GetValue;
end;

function TJvTreePopupDataList.GetValue: Variant;
begin
  if FTree.Selected <> nil then
//    Result := (FTree.Selected as TJvDBTreeNode).MasterValue
    Result := FTree.DataSource.DataSet.Lookup(FTree.MasterField,
      (FTree.Selected as TJvDBTreeNode).MasterValue, (Owner as TJvDBLookupControl).KeyField)
  else
    Result := Null;
end;

procedure TJvTreePopupDataList.SetValue(const Value: Variant);
begin
  FTree.SelectNode(Value);
end;

//=== { TJvPopupTree } =======================================================

{******* from ComCtl98 unit}
  // Jean-Luc Mattei
  // jlucm dott club-internet att fr
const
  NM_CUSTOMDRAW = (NM_FIRST - 12);
  CDDS_PREPAINT = $000000001;
  CDRF_NOTIFYITEMDRAW = $00000020;
  CDDS_ITEM = $000010000;
  CDDS_ITEMPREPAINT = (CDDS_ITEM or CDDS_PREPAINT);
  CDIS_SELECTED = $0001;

type
  PNMCustomDrawInfo = ^TNMCustomDrawInfo;
  TNMCustomDrawInfo = packed record
    hdr: TNMHdr;
    dwDrawStage: Longint;
    hdc: HDC;
    rc: TRect;
    dwItemSpec: Longint; // this is control specific, but it's how to specify an item.  valid only with CDDS_ITEM bit set
    uItemState: Cardinal;
    lItemlParam: Longint;
  end;
{####### from ComCtl98 unit}

procedure TJvPopupTree.CNNotify(var Msg: TWMNotify);
begin
  with Msg.NMHdr^ do
    case code of
      NM_CUSTOMDRAW:
        begin
          with PNMCustomDrawInfo(Pointer(Msg.NMHdr))^ do
          begin
            if (dwDrawStage and CDDS_PREPAINT) = CDDS_PREPAINT then
              Msg.Result := CDRF_NOTIFYITEMDRAW;
            if (dwDrawStage and CDDS_ITEMPREPAINT) = CDDS_ITEMPREPAINT then
            begin
              if (uItemState and CDIS_SELECTED) <> 0 then
              begin
                SetTextColor(hdc, ColorToRGB(clHighlightText));
                SetBkColor(hdc, ColorToRGB(clHighlight));
              end;
              Msg.Result := CDRF_NOTIFYITEMDRAW;
            end;
          end;
        end;
    else
      inherited;
    end;
end;

procedure TJvPopupTree.FocusSet(PrevWnd: THandle);
begin
  inherited FocusSet(PrevWnd);
  (Owner.Owner as TJvDBLookupTreeViewCombo).SetFocus;
end;

procedure TJvPopupTree.DblClick;
begin
  (Owner.Owner as TJvDBLookupTreeViewCombo).CloseUp(True);
end;

//=== { TJvDBLookupTreeView } ================================================

type
  TJvDBLookupTreeViewTree = class(TJvDBTreeView)
  private
    procedure DataScrolled; override;
    procedure DataChanged; override;
    procedure Change2(Node: TTreeNode); override;
    procedure DefaultHandler(var Message); override;
  end;

constructor TJvDBLookupTreeView.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FBorderStyle := bsSingle;
  FTree := TJvDBLookupTreeViewTree.Create(Self);
  FTree.Parent := Self;
  Width := FTree.Width;
  Height := FTree.Height;
  FTree.Align := alClient;
  FTree.ReadOnly := True;
  FTree.BorderStyle := bsNone;
  FTree.HideSelection := False;
//  FTree.TabStop := False;
end;

destructor TJvDBLookupTreeView.Destroy;
begin
  FTree.Free;
  inherited Destroy;
end;

procedure TJvDBLookupTreeView.CreateParams(var Params: TCreateParams);
begin
  inherited CreateParams(Params);
  with Params do
    if FBorderStyle = bsSingle then
      if NewStyleControls and Ctl3D then
        ExStyle := ExStyle or WS_EX_CLIENTEDGE
      else
        Style := Style or WS_BORDER;
end;

procedure TJvDBLookupTreeView.SetBorderStyle(Value: TBorderStyle);
begin
  if FBorderStyle <> Value then
  begin
    FBorderStyle := Value;
    RecreateWnd;
  end;
end;

function TJvDBLookupTreeView.GetMasterField: string;
begin
  Result := FTree.MasterField;
end;

procedure TJvDBLookupTreeView.SetMasterField(Value: string);
begin
  FTree.MasterField := Value;
end;

function TJvDBLookupTreeView.GetDetailField: string;
begin
  Result := FTree.DetailField;
end;

procedure TJvDBLookupTreeView.SetDetailField(Value: string);
begin
  FTree.DetailField := Value;
end;

function TJvDBLookupTreeView.GetIconField: string;
begin
  Result := FTree.IconField;
end;

procedure TJvDBLookupTreeView.SetIconField(const Value: string);
begin
  FTree.IconField := Value;
end;

function TJvDBLookupTreeView.GetStartMasterValue: string;
begin
  Result := FTree.StartMasterValue;
end;

procedure TJvDBLookupTreeView.SetStartMasterValue(Value: string);
begin
  FTree.StartMasterValue := Value;
end;

procedure TJvDBLookupTreeView.ListLinkActiveChanged;
begin
  inherited ListLinkActiveChanged;
  FTree.DataSource := ListSource;
  FTree.ItemField := ListField;
end;

procedure TJvDBLookupTreeView.KeyValueChanged;
begin
  InKeyValueChanged := True;
  try
    TJvDBLookupTreeViewTree(FTree).SelectNode(FKeyValue);
  finally
    InKeyValueChanged := False;
  end;
end;

procedure TJvDBLookupTreeView.FocusSet(PrevWnd: THandle);
begin
  FTree.SetFocus;
end;

{** Tree}

function TJvDBLookupTreeView.GetShowButtons: Boolean;
begin
  Result := FTree.ShowButtons;
end;

function TJvDBLookupTreeView.GetShowLines: Boolean;
begin
  Result := FTree.ShowLines;
end;

function TJvDBLookupTreeView.GetShowRoot: Boolean;
begin
  Result := FTree.ShowRoot;
end;

function TJvDBLookupTreeView.GetReadOnly: Boolean;
begin
  Result := FTree.ReadOnly;
end;

function TJvDBLookupTreeView.GetRightClickSelect: Boolean;
begin
  Result := FTree.RightClickSelect;
end;

function TJvDBLookupTreeView.GetHideSelection: Boolean;
begin
  Result := FTree.HideSelection;
end;

function TJvDBLookupTreeView.GetIndent: Integer;
begin
  Result := FTree.Indent;
end;

procedure TJvDBLookupTreeView.SetShowButtons(Value: Boolean);
begin
  FTree.ShowButtons := Value;
end;

procedure TJvDBLookupTreeView.SetShowLines(Value: Boolean);
begin
  FTree.ShowLines := Value;
end;

procedure TJvDBLookupTreeView.SetShowRoot(Value: Boolean);
begin
  FTree.ShowRoot := Value;
end;

procedure TJvDBLookupTreeView.SetReadOnly(Value: Boolean);
begin
  FTree.ReadOnly := Value;
end;

procedure TJvDBLookupTreeView.SetRightClickSelect(Value: Boolean);
begin
  FTree.RightClickSelect := Value;
end;

procedure TJvDBLookupTreeView.SetHideSelection(Value: Boolean);
begin
  FTree.HideSelection := Value;
end;

procedure TJvDBLookupTreeView.SetIndent(Value: Integer);
begin
  FTree.Indent := Value;
end;

{ Translate properties }

function TJvDBLookupTreeView.GetAutoExpand: Boolean;
begin
  Result := FTree.AutoExpand;
end;

function TJvDBLookupTreeView.GetChangeDelay: Integer;
begin
  Result := FTree.ChangeDelay;
end;

function TJvDBLookupTreeView.GetHotTrack: Boolean;
begin
  Result := FTree.HotTrack;
end;

function TJvDBLookupTreeView.GetOnCustomDraw: TTVCustomDrawEvent;
begin
  Result := FTree.OnCustomDraw;
end;

function TJvDBLookupTreeView.GetOnCustomDrawItem: TTVCustomDrawItemEvent;
begin
  Result := FTree.OnCustomDrawItem;
end;

function TJvDBLookupTreeView.GetOnGetImageIndex: TTVExpandedEvent;
begin
  Result := FTree.OnGetImageIndex;
end;

function TJvDBLookupTreeView.GetRowSelect: Boolean;
begin
  Result := FTree.RowSelect;
end;

function TJvDBLookupTreeView.GetToolTips: Boolean;
begin
  Result := FTree.ToolTips;
end;

procedure TJvDBLookupTreeView.SetAutoExpand(const Value: Boolean);
begin
  FTree.AutoExpand := Value;
end;

procedure TJvDBLookupTreeView.SetChangeDelay(const Value: Integer);
begin
  FTree.ChangeDelay := Value;
end;

procedure TJvDBLookupTreeView.SetHotTrack(const Value: Boolean);
begin
  FTree.HotTrack := Value;
end;

procedure TJvDBLookupTreeView.SetOnCustomDraw(const Value: TTVCustomDrawEvent);
begin
  FTree.OnCustomDraw := Value;
end;

procedure TJvDBLookupTreeView.SetOnCustomDrawItem(const Value: TTVCustomDrawItemEvent);
begin
  FTree.OnCustomDrawItem := Value;
end;

procedure TJvDBLookupTreeView.SetOnGetImageIndex(const Value: TTVExpandedEvent);
begin
  FTree.OnGetImageIndex := Value;
end;

procedure TJvDBLookupTreeView.SetRowSelect(const Value: Boolean);
begin
  FTree.RowSelect := Value;
end;

procedure TJvDBLookupTreeView.SetToolTips(const Value: Boolean);
begin
  FTree.ToolTips := Value;
end;

{# Translate properties }

//=== { TJvDBLookupTreeViewTree } ============================================

procedure TJvDBLookupTreeViewTree.DataScrolled;
begin
end;

procedure TJvDBLookupTreeViewTree.DataChanged;
begin
  inherited DataChanged;
end;

procedure TJvDBLookupTreeViewTree.Change2(Node: TTreeNode);
begin
  with Owner as TJvDBLookupTreeView do
    if not InKeyValueChanged then
    begin
      FListLink.DataSet.Locate(MasterField, (Node as TJvDBTreeNode).MasterValue, []);
      SelectKeyValue(FKeyField.Value);
      KeyValueChanged;
    end;
end;

procedure TJvDBLookupTreeViewTree.DefaultHandler(var Message);
begin
  inherited DefaultHandler(Message);
  with TMessage(Message) do
    case Msg of
      WM_KEYDOWN, WM_KEYUP, WM_CHAR, WM_LBUTTONDOWN, WM_LBUTTONUP,
      WM_RBUTTONDOWN, WM_RBUTTONUP, WM_MBUTTONDOWN, WM_MBUTTONUP,
      WM_MOUSEMOVE:
        PostMessage((Owner as TWinControl).Handle, Msg, WParam, LParam);
    end;
end;

procedure TJvDBLookupTreeViewCombo.FocusKilled(NextWnd: THandle);
begin
  if (Handle <> NextWnd) and (FDataList.Handle <> NextWnd) and
    (FDataList.FTree.Handle <> NextWnd) then
    CloseUp(False);

  inherited FocusKilled(NextWnd);
end;


{added by zelen}
{$IFDEF JVCLThemesEnabled}

procedure TJvDBLookupTreeViewCombo.MouseEnter(Control: TControl);
begin
  if csDesigning in ComponentState then
    Exit;
  inherited MouseEnter(Control);
  {Windows XP themes use hot track states, hence we have to update the drop down button.}
  if ThemeServices.ThemesEnabled and not MouseOver and not (csDesigning in ComponentState) then
    Invalidate;
end;

procedure TJvDBLookupTreeViewCombo.MouseLeave(Control: TControl);
begin
  if csDesigning in ComponentState then
    Exit;
  if ThemeServices.ThemesEnabled and MouseOver then
    Invalidate;
  inherited MouseLeave(Control);
end;

{$ENDIF JVCLThemesEnabled}
{/added by zelen}

{$IFDEF UNITVERSIONING}
initialization
  RegisterUnitVersion(HInstance, UnitVersioning);

finalization
  UnregisterUnitVersion(HInstance);
{$ENDIF UNITVERSIONING}

end.

