Overriding Dependency Setup Behavior

By default when the user connects 2 tasks a "Finish to Start" depedency will be setup. You can override this behavior by providing a NewDependencyValidator method as follows:

this.ganttControl.ItemsSource = taskItems;

// Do this after assigning the ItemsSource

((BaseGanttModel)this.ganttControl.Model).NewDependencyValidator = this.NewDependencyValidator;

Then implement the above method as follows:

bool NewDependencyValidator(IActivity from, IActivity to, NewDependencyAddScenarioType addType)

{

// Setup a workaround to change default dependency types to FF rather than FS.

if (addType == NewDependencyAddScenarioType.UserDragDrop)

{

// If the user has connected 2 tasks in the Chart to setup dependency, first cancel that op, by returning false below....

this.Dispatcher.BeginInvoke(

(ThreadStart)delegate()

{

// .... and instead create a new FF dependency here.

this.ganttControl.Model.CreateNewDependency(from, to, DependencyType.FinishToFinish, TimeSpan.Zero);

}

);

return false;

}

else

{

// All other scenarios, simply return true to allow normal processing.

return true;

}