unit uniDBLookupComboBoxObject;
interface
uses
System.SysUtils,
System.Classes,
Vcl.Controls,
Vcl.Forms,
Data.DB,
uniGUIBaseClasses,
uniGUIClasses,
uniMultiItem,
uniComboBox,
uniDBComboBox,
uniDBLookupComboBox,
Aurelius.Bind.Dataset,
System.Variants,
devsul.model.search,
Aurelius.Criteria.Linq,
Aurelius.Criteria.Base;
type
TUniDBLookupComboBoxObject = class(TUniDBLookupComboBox)
private
{ Private declarations }
FRequired: Boolean;
FListSource, FDataSet: TAureliusDataset;
FCriteriaListSource: TCriteria;
FListValues: TStringList;
procedure ExecuteSearch;
protected
{ Protected declarations }
FOldUniTriggerEvent: TUniTriggerEvent;
FSearch: TSearch;
procedure DoSetRemoteValue(AIndex: Integer; Value: string); override;
procedure MyTriggerEvent(Sender: TUniCustomComboBox; AButtonId: Integer);
procedure LoadCompleted; override;
procedure _RemoteQuery(const QueryString: string; Result: TStrings);
procedure _GetKeyValue(const Value: string; var KeyValue: Variant);
public
{ Public declarations }
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure SetSearch(Search: TSearch);
published
{ Published declarations }
property Required: Boolean read FRequired write FRequired default False;
end;
procedure Register;
implementation
uses view.search.default,
uniGUIApplication,
Winapi.Windows;
procedure Register;
begin
RegisterComponents('UniGUI Extension', [TUniDBLookupComboBoxObject]);
end;
{ TUniDBLookupComboBoxObject }
constructor TUniDBLookupComboBoxObject.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
end;
destructor TUniDBLookupComboBoxObject.Destroy;
begin
if Assigned(Self.FSearch) then
Self.FSearch.Free;
if Assigned(Self.FListValues) then
Self.FListValues.Free;
if Assigned(Self.FCriteriaListSource) then
Self.FCriteriaListSource.Free;
if Assigned(Self.FListSource)then
Self.FListSource.Free;
inherited Destroy;
end;
procedure TUniDBLookupComboBoxObject.DoSetRemoteValue(AIndex: Integer; Value: string);
begin
inherited;
if (VarIsNull(Self.KeyValue)) and (Assigned(Self.FDataSet)) then
Self.FDataSet.EntityFieldByName(String(Self.DataField)).AsObject := nil;
end;
procedure TUniDBLookupComboBoxObject.ExecuteSearch;
begin
with TuniFormSearch.Create(UniApplication) do
begin
try
ConfigureSearch(Self.FSearch);
ShowModal;
if ModalResult = mrOk then
begin
if Assigned(Selected) then
begin
Self.FListSource.Close;
Self.FListSource.SetSourceObject(Selected);
Self.FListSource.Open;
if Assigned(Self.FDataSet) then
Self.FDataSet.EntityFieldByName(Trim(String(Self.DataField))).AsObject := Selected;
if Assigned(Self.OnSelect) then
Self.OnSelect(Self);
end;
end;
finally
Free;
end;
Self.SetFocus;
end;
end;
procedure TUniDBLookupComboBoxObject.LoadCompleted;
begin
if Self.Required then
Self.ClientEvents.UniEvents.Values['beforeInit'] := 'function beforeInit(sender, config){Ext.apply(sender,{allowBlank:false,msgTarget : ''side''});}';
if Self.Triggers.Count = 0 then
begin
with Self.Triggers.Add do
begin
IconCls := 'x-form-search-trigger';
HandleClicks := True;
Visible := True;
end;
end
else
begin
Self.Triggers[0].IconCls := 'x-form-search-trigger';
Self.Triggers[0].HandleClicks := True;
Self.Triggers[0].Visible := True;
end;
Self.FOldUniTriggerEvent := Self.OnTriggerEvent;
OnTriggerEvent := Self.MyTriggerEvent;
if Self.RemoteQuery then
begin
FListValues := TStringList.Create;
Self.OnRemoteQuery := Self._RemoteQuery;
Self.OnGetKeyValue := Self._GetKeyValue;
end;
inherited;
end;
procedure TUniDBLookupComboBoxObject.MyTriggerEvent(Sender: TUniCustomComboBox; AButtonId: Integer);
begin
if AButtonId = 0 then
Self.ExecuteSearch;
if Assigned(Self.FOldUniTriggerEvent) then
Self.FOldUniTriggerEvent(Sender, AButtonId);
end;
procedure TUniDBLookupComboBoxObject._GetKeyValue(const Value: string; var KeyValue: Variant);
var
lObj: TObject;
lIndex : Integer;
begin
KeyValue := Null;
lObj := nil;
if not Value.IsEmpty and not Self.FListSource.IsEmpty then
begin
if FListValues.Count = 0 then
lObj := Self.FListSource.InternalList.Item(0)
else
begin
lIndex := FListValues.IndexOf(Value);
if lIndex <> -1 then
lObj := Self.FListSource.InternalList.Item(lIndex);
end;
if Assigned(lObj) then
KeyValue := Integer(lObj);
end;
end;
procedure TUniDBLookupComboBoxObject._RemoteQuery(const QueryString: string; Result: TStrings);
var
lListFields: TStringList;
i: Integer;
lCriterion: TLinqExpression;
lCustomCriteria: TCriteria;
lStrListValue: String;
begin
if (Self.FCriteriaListSource <> nil) and (Trim(Self.Text) <> Trim(QueryString)) then
begin
lListFields := nil;
try
lListFields := TStringList.Create;
lListFields.Text := Self.ListField.Replace(';', sLineBreak);
lCustomCriteria := Self.FCriteriaListSource.Clone;
lCriterion := Linq[lListFields[0]].Upper.Like(UpperCase(VarToStr(QueryString)) + '%');
lListFields.Delete(0);
for i := 0 to lListFields.Count - 1 do
if Self.FListSource.FieldByName(lListFields).Tag = 0 then
lCriterion := lCriterion or (Linq[lListFields].Upper.Like('%' + UpperCase(VarToStr(QueryString)) + '%'));
lCustomCriteria.Where(lCriterion);
Self.FListSource.Close;
Self.FListSource.SetSourceCriteria(lCustomCriteria, 25);
Self.FListSource.Open;
lListFields.Text := Self.ListField.Replace(';', sLineBreak);
Self.FListValues.Clear;
while not Self.FListSource.Eof do
begin
lStrListValue := EmptyStr;
for i := 0 to lListFields.Count - 1 do
begin
if i = 0 then
begin
if Self.FListSource.FieldByName(lListFields).AsString <> '' then
lStrListValue := Self.FListSource.FieldByName(lListFields).AsString
end
else
begin
if Self.FListSource.FieldByName(lListFields).AsString <> '' then
lStrListValue := lStrListValue + ' - ' + Self.FListSource.FieldByName(lListFields).AsString;
end;
end;
if not lStrListValue.IsEmpty then
begin
Result.Add(lStrListValue);
Self.FListValues.Add(lStrListValue);
end;
Self.FListSource.Next;
end;
finally
lListFields.Free;
lCriterion := nil;
end;
end;
end;
procedure TUniDBLookupComboBoxObject.SetSearch(Search: TSearch);
var
lObject: TObject;
begin
Self.FSearch := Search;
Self.FListSource := TAureliusDataset(Self.ListSource.Dataset);
Self.FDataSet := TAureliusDataset(Self.DataSource.Dataset);
Self.FCriteriaListSource := Search.Criteria.Clone;
lObject := Self.FDataSet.EntityFieldByName(String(Self.DataField)).AsObject;
if Assigned(lObject) then
begin
Self.FListSource.Close;
Self.FListSource.SetSourceObject(lObject);
Self.FListSource.Open;
Self.KeyValue := Integer(lObject);
Self.UpdateText;
end;
end;
end.
