{----------------------------------------------------------------------------- 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 Copyright (c) 1999, 2002 Andrei Prygounkov All Rights Reserved. Contributor(s): Marc Geldon Last Modified: 2005-03-07 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 Known Issues: -----------------------------------------------------------------------------} {$I JVCL.INC} { history (JVCL Library versions) : 1.20: - first release; 1.61: - support for non-bde components; 2.01: - support for BiDi mode (thanks to Oussama Al-Rifai); } unit JvDBLookupTreeView; interface uses {$IFDEF COMPILER6_UP} Variants, VDBConsts, {$ENDIF} Windows, Messages, SysUtils, Classes, Controls, Forms, Graphics, CommCtrl, ComCtrls, Db, JvDBTreeView; // (rom) obviously not used //const //WM_INCLOSE = WM_USER + 1; {********************** Borland **********************} type TJvDBLookupControl = class; TJvDataSourceLink = class(TDataLink) private FDBLookupControl: TJvDBLookupControl; protected procedure FocusControl(Field: TFieldRef); override; procedure ActiveChanged; override; procedure RecordChanged(Field: TField); override; end; TJvListSourceLink = class(TDataLink) private FDBLookupControl: TJvDBLookupControl; protected procedure ActiveChanged; override; procedure DataSetChanged; override; end; TJvDBLookupControl = class(TCustomControl) private FLookupSource: TDataSource; FDataLink: TJvDataSourceLink; FListLink: TJvListSourceLink; 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; 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 WMGetDlgCode(var Msg: TMessage); message WM_GETDLGCODE; procedure WMKillFocus(var Msg: TMessage); message WM_KILLFOCUS; procedure WMSetFocus(var Msg: TMessage); message WM_SETFOCUS; procedure CMGetDataLink(var Msg: TMessage); message CM_GETDATALINK; protected 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; TJvPopupDataList = class; TDropDownAlign = (daLeft, daRight, daCenter); TJvDBLookupTreeViewCombo = class(TJvDBLookupControl) private FDataList: TJvPopupDataList; 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; {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 CMCancelMode(var Msg: TCMCancelMode); message CM_CANCELMODE; procedure CMCtl3DChanged(var Msg: TMessage); message CM_CTL3DCHANGED; procedure CMFontChanged(var Msg: TMessage); message CM_FONTCHANGED; procedure CMGetDataLink(var Msg: TMessage); message CM_GETDATALINK; procedure WMCancelMode(var Msg: TMessage); message WM_CANCELMODE; procedure WMKillFocus(var Msg: TWMKillFocus); message WM_KILLFOCUS; private {$IFDEF COMPILER4_UP} FAutoExpand: Boolean; FChangeDelay: Integer; FHotTrack: Boolean; FRowSelect: Boolean; FToolTips: Boolean; FOnCustomDraw: TTVCustomDrawEvent; FOnCustomDrawItem: TTVCustomDrawItemEvent; FOnGetImageIndex: TTVExpandedEvent; {$ENDIF COMPILER4_UP} protected 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; 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 Color; property Ctl3D; 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 ParentCtl3D; 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; {$IFDEF COMPILER3_UP} property ImeMode; property ImeName; {$ENDIF COMPILER3_UP} {$IFDEF COMPILER4_UP} property Anchors; 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; {$ENDIF COMPILER4_UP} end; {###################### Borland ######################} TJvPopupTree = class(TJvDBTreeView) private procedure CNNotify(var Msg: TWMNotify); message CN_NOTIFY; procedure WMSetFocus(var Msg: TMessage); message WM_SETFOCUS; protected procedure DblClick; override; end; TJvPopupDataList = class(TWinControl) private FTree: TJvPopupTree; function GetKeyValue: Variant; property KeyValue: Variant read GetKeyValue; // procedure WMSetFocus(var Msg: TMessage); message WM_SETFOCUS; protected procedure CreateParams(var Params: TCreateParams); override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; end; TJvDBLookupTreeView = class(TJvDBLookupControl) private FTree: TJvDBTreeView; FBorderStyle: TBorderStyle; InKeyValueChanged: Boolean; procedure SetBorderStyle(Value: TBorderStyle); function GetMasterField: string; procedure SetMasterField(Value: string); function GetDetailField: string; procedure SetDetailField(Value: string); function GetStartMasterValue: string; procedure SetStartMasterValue(Value: string); function GetIconField: string; procedure SetIconField(const Value: string); procedure KeyValueChanged; override; procedure WMSetFocus(var Msg: TMessage); message WM_SETFOCUS; {Tree} function GetShowButtons: Boolean; function GetShowLines: Boolean; function GetShowRoot: Boolean; function GetReadOnly: Boolean; function GetHideSelection: Boolean; function GetIndent: Integer; procedure SetShowButtons(Value: Boolean); procedure SetShowLines(Value: Boolean); procedure SetShowRoot(Value: Boolean); procedure SetReadOnly(Value: Boolean); procedure SetHideSelection(Value: Boolean); procedure SetIndent(Value: Integer); {$IFDEF COMPILER3_UP} function GetRightClickSelect: Boolean; procedure SetRightClickSelect(Value: Boolean); {$ENDIF COMPILER3_UP} {$IFDEF COMPILER4_UP} 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); {$ENDIF COMPILER4_UP} protected procedure CreateParams(var Params: TCreateParams); override; procedure ListLinkActiveChanged; override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; published property Align; property BorderStyle: TBorderStyle read FBorderStyle write SetBorderStyle default bsSingle; property Color; property Ctl3D; property DataField; property DataSource; property DragCursor; property DragMode; property Enabled; property Font; property KeyField; property ListField; property ListFieldIndex; property ListSource; property ParentColor; property ParentCtl3D; property ParentFont; property ParentShowHint; property PopupMenu; property ShowHint; property TabOrder; property TabStop; property Visible; property OnClick; property OnDblClick; property OnDragDrop; property OnDragOver; property OnEndDrag; property OnEnter; property OnExit; property OnKeyDown; property OnKeyPress; property OnKeyUp; property OnMouseDown; property OnMouseMove; property OnMouseUp; property OnStartDrag; {$IFDEF COMPILER3_UP} property ImeMode; property ImeName; {$ENDIF COMPILER3_UP} {$IFDEF COMPILER4_UP} 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; {$ENDIF COMPILER4_UP} {Tree} property MasterField: string read GetMasterField write SetMasterField; property DetailField: string read GetDetailField write SetDetailField; property IconField: string read GetIconField write SetIconField; property StartMasterValue: string read GetStartMasterValue write SetStartMasterValue; property ShowButtons: Boolean read GetShowButtons write SetShowButtons; property ShowLines: Boolean read GetShowLines write SetShowLines; property ShowRoot: Boolean read GetShowRoot write SetShowRoot; property ReadOnly: Boolean read GetReadOnly write SetReadOnly; {$IFDEF COMPILER3_UP} property RightClickSelect: Boolean read GetRightClickSelect write SetRightClickSelect; {$ENDIF COMPILER3_UP} property HideSelection: Boolean read GetHideSelection write SetHideSelection; property Indent: Integer read GetIndent write SetIndent; end; implementation uses DBConsts; //=== TJvDataSourceLink ====================================================== {$IFDEF COMPILER2} function GetFieldProperty(DataSet: TDataSet; Control: TComponent; const FieldName: string): TField; begin Result := DataSet.FindField(FieldName); if Result = nil then raise EDatabaseError.CreateFmt(LoadStr(SFieldNotFound), [Control.Name, FieldName]); end; {$ENDIF COMPILER2} procedure TJvDataSourceLink.ActiveChanged; begin if FDBLookupControl <> nil then FDBLookupControl.DataLinkActiveChanged; end; procedure TJvDataSourceLink.RecordChanged(Field: TField); begin if FDBLookupControl <> nil then FDBLookupControl.DataLinkRecordChanged(Field); end; procedure TJvDataSourceLink.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 TJvListSourceLink.ActiveChanged; begin if FDBLookupControl <> nil then FDBLookupControl.ListLinkActiveChanged; end; procedure TJvListSourceLink.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; // (rom) definitely bad implementation two components may concurrently use // (rom) the variable var SearchTickCount: Integer = 0; constructor TJvDBLookupControl.Create(AOwner: TComponent); begin inherited Create(AOwner); if NewStyleControls then ControlStyle := [csOpaque] else ControlStyle := [csOpaque, csFramed]; ParentColor := False; TabStop := True; FLookupSource := TDataSource.Create(Self); FDataLink := TJvDataSourceLink.Create; FDataLink.FDBLookupControl := Self; FListLink := TJvListSourceLink.Create; FListLink.FDBLookupControl := Self; FListFields := TList.Create; FKeyValue := Null; end; destructor TJvDBLookupControl.Destroy; begin FListFields.Free; FListLink.FDBLookupControl := nil; FListLink.Free; FDataLink.FDBLookupControl := nil; FDataLink.Free; 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 {$IFDEF COMPILER3_UP} DatabaseError(SCircularDataLink); {$ELSE} DatabaseError(LoadStr(SCircularDataLink)); {$ENDIF COMPILER3_UP} end; procedure TJvDBLookupControl.CheckNotLookup; begin if FLookupMode then {$IFDEF COMPILER3_UP} DatabaseError(SPropDefByLookup); {$ELSE} DatabaseError(LoadStr(SPropDefByLookup)); {$ENDIF COMPILER3_UP} if FDataLink.DataSourceFixed then {$IFDEF COMPILER3_UP} DatabaseError(SDataSourceFixed); {$ELSE} DatabaseError(LoadStr(SDataSourceFixed)); {$ENDIF COMPILER3_UP} 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(0); SaveFont := SelectObject(DC, Font.Handle); GetTextMetrics(DC, Metrics); SelectObject(DC, SaveFont); ReleaseDC(0, 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 {$IFDEF COMPILER3_UP} DatabaseErrorFmt(SFieldNotFound, [Self.Name, FListFieldName]); {$ELSE} raise EDatabaseError.CreateFmt(LoadStr(SFieldNotFound), [Self.Name, FListFieldName]); {$ENDIF COMPILER3_UP} 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 - SearchTickCount > 2000 then FSearchText := ''; SearchTickCount := 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.WMGetDlgCode(var Msg: TMessage); begin Msg.Result := DLGC_WANTARROWS or DLGC_WANTCHARS; end; procedure TJvDBLookupControl.WMKillFocus(var Msg: TMessage); begin FFocused := False; inherited; Invalidate; end; procedure TJvDBLookupControl.WMSetFocus(var Msg: TMessage); begin FFocused := True; inherited; 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 := TJvPopupDataList.Create(Self); FDataList.Visible := False; FDataList.Parent := Self; FButtonWidth := GetSystemMetrics(SM_CXVSCROLL); FDropDownHeight := 100; 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; 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; 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; 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); if not FListActive 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; 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.KeyValue; SetFocus; 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;} {$IFDEF COMPILER4_UP} OldLong: Longword; {$ENDIF COMPILER4_UP} begin if not FListVisible and FListActive then begin if Assigned(FOnDropDown) then FOnDropDown(Self); FDataList.Color := Color; FDataList.Font := Font; if FDropDownWidth > 0 then FDataList.Width := FDropDownWidth else FDataList.Width := Width; FDataList.Height := FDropDownHeight; // FDataList.RowCount := FDropDownRows; // FDataList.KeyField := FKeyFieldName; FDataList.FTree.MasterField := FKeyFieldName; FDataList.FTree.DetailField := FDetailField; FDataList.FTree.IconField := FIconField; FDataList.FTree.MasterField := FMasterField; FDataList.FTree.StartMasterValue := FStartMasterValue; FDataList.FTree.UseFilter := FUseFilter; {$IFDEF COMPILER4_UP} {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 $00400000); {End of source added by Oussama Al-Rifai} FDataList.FTree.AutoExpand := FAutoExpand; FDataList.FTree.ChangeDelay := FChangeDelay; FDataList.FTree.HotTrack := FHotTrack; FDataList.FTree.RowSelect := FRowSelect; FDataList.FTree.ToolTips := FToolTips; FDataList.FTree.OnCustomDraw := FOnCustomDraw; FDataList.FTree.OnCustomDrawItem := FOnCustomDrawItem; FDataList.FTree.OnGetImageIndex := FOnGetImageIndex; FDataList.FTree.ReadOnly := not FDataLink.ReadOnly; {$ENDIF COMPILER4_UP} { 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.FTree.SelectNode( 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; FDataList.Visible := True; SetWindowPos(FDataList.Handle, HWND_TOP, P.X, Y, 0, 0, SWP_NOSIZE or SWP_NOACTIVATE or SWP_SHOWWINDOW); FListVisible := True; 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.CMCancelMode(var Msg: TCMCancelMode); begin if (Msg.Sender <> Self) and (Msg.Sender <> FDataList) then CloseUp(False); end; procedure TJvDBLookupTreeViewCombo.CMCtl3DChanged(var Msg: TMessage); begin if NewStyleControls then begin RecreateWnd; Height := 0; end; inherited; end; procedure TJvDBLookupTreeViewCombo.CMFontChanged(var Msg: TMessage); begin inherited; 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.WMKillFocus(var Msg: TWMKillFocus); begin inherited; // if Msg.FocusedWnd = FDataList.Handle then SetFocus {else CloseUp(False);} end; //=== TJvPopupDataList ======================================================= constructor TJvPopupDataList.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 TJvPopupDataList.Destroy; begin FTree.Free; inherited Destroy; end; procedure TJvPopupDataList.CreateParams(var Params: TCreateParams); begin inherited CreateParams(Params); with Params do begin Style := WS_POPUP or WS_BORDER; ExStyle := WS_EX_TOOLWINDOW; WindowClass.Style := CS_SAVEBITS; end; end; function TJvPopupDataList.GetKeyValue: 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; //=== TJvPopupTree =========================================================== {******* from ComCtl98 unit} //////////////////////////// // Jean-Luc Mattei // // jlucm@club-internet.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.WMSetFocus(var Msg: TMessage); begin inherited; Msg.Result := 1; (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 Msg); 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.WMSetFocus(var Msg: TMessage); 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; {$IFDEF COMPILER3_UP} function TJvDBLookupTreeView.GetRightClickSelect: Boolean; begin Result := FTree.RightClickSelect; end; {$ENDIF COMPILER3_UP} function TJvDBLookupTreeView.GetHideSelection: Boolean; begin Result := FTree.HideSelection; end; function TJvDBLookupTreeView.GetIndent: Integer; begin Result := FTree.Indent; end; procedure TJvDBLookupTreeView.SetShowButtons(Value: Boolean); begin FTree.ShowButtons := Value; end; procedure TJvDBLookupTreeView.SetShowLines(Value: Boolean); begin FTree.ShowLines := Value; end; procedure TJvDBLookupTreeView.SetShowRoot(Value: Boolean); begin FTree.ShowRoot := Value; end; procedure TJvDBLookupTreeView.SetReadOnly(Value: Boolean); begin FTree.ReadOnly := Value; end; {$IFDEF COMPILER3_UP} procedure TJvDBLookupTreeView.SetRightClickSelect(Value: Boolean); begin FTree.RightClickSelect := Value; end; {$ENDIF COMPILER3_UP} procedure TJvDBLookupTreeView.SetHideSelection(Value: Boolean); begin FTree.HideSelection := Value; end; procedure TJvDBLookupTreeView.SetIndent(Value: Integer); begin FTree.Indent := Value; end; { Translate properties } {$IFDEF COMPILER4_UP} 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; {$ENDIF COMPILER4_UP} {# 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 Msg); begin inherited DefaultHandler(Msg); with TMessage(Msg) 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; end.