TMS Pack for FireMonkey Developers Guide - TMS Software

TMS SOFTWARETMS Pack for FireMonkeyDEVELOPERS GUIDEis set to TMSFMXTableView1 and we want the RotationAngle to be modified. Fill in RotationAngle inthe Control Expression field. For the Source Expression which is linked with the SourceComponentwe fill in “Value”.Now there is one step left to implement before the application is ready. When dragging the slider ofthe TrackBar, the RotationAngle of the TMSFMXTableView component will be unaffected. This isbecause the TMSFMXTableView did not receive a notice from the BindingsList component, thereforewe need to notify the bind component that the value of the TrackBar has changed.This is done by implementing the OnChange event and notifying the BindingsList component:varFNotifying: Integer;procedure TForm557.TrackBar1Change(Sender: TObject);begin// Some controls send notifications when setting properties,// like TTrackBarif FNotifying = 0 thenbeginInc(FNotifying);// Send notification to cause expression re-evaluation of dependentexpressionstryBindingsList1.Notify(Sender, '');finallyDec(FNotifying);end;end;end;Now when dragging the slider of the TrackBar, the BindingsList is notified and the TMSFMXTableViewrotates according to the Value of the TrackBar. Multiple bindings can be made and are triggeredsimultaneously due to the Notify procedure of the BindingsList.In the BindingsList editor window you will notice that a new category is added for the TableView:“DB TableView Links”. The link “TTMSFMXBindDBTableViewLink” can be used to connect to aDataSource through a BindScope. This link is designed to work specifically with DataBaseconnections.The TableView DB link automatically generates Expressions to link the SelectedItemIndex to thecorrect record in the Database. Internally the DataSet is automatically loaded and for each recordin the DataSet an item is added.50