TdxGanttControlTaskLinkEvent Type

Performs a set of actions during a task dependency create operation (with the mouse) in the chart.

Declaration

TdxGanttControlTaskLinkEvent = procedure(Sender: TObject; ATask: TdxGanttControlTask; ALinkedTask: TdxGanttControlTask; var AAccept: Boolean) of object;

Parameters

Name	Type	Description
Sender	TObject	The Chart View that raised the event.
ATask	TdxGanttControlTask	The predecessor task for ALinkedTask.
ALinkedTask	TdxGanttControlTask	The ATask‘s successor task.
AAccept	Boolean	Specifies if the event handler accepts or declines a dependency create operation in response to a mouse drag-and-drop action.

Remarks

You can open the Features Demo and modify its code. Handle the OnTaskLink event and use the following code snippet to allow a user to link a task with any task except for a summary task:

Delphi

procedure TFeaturesDemoMainForm.GanttControlViewChartTaskLink(Sender: TObject; ATask,
  ALinkedTask: TdxGanttControlTask; var AAccept: Boolean);
begin
  AAccept := not ALinkedTask.Summary;
end;

C++

void __fastcall TFeaturesDemoMainForm::GanttControlViewChartTaskLink(TObject *Sender,
          TdxGanttControlTask *ATask, TdxGanttControlTask *ALinkedTask, bool &AAccept)
{
  AAccept = !(ALinkedTask->Summary);
}