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TdxGanttControlTaskPercentCompleteChangeEvent Type

Performs a set of actions during a task‘s progress change with the mouse.

#Declaration

Delphi
TdxGanttControlTaskPercentCompleteChangeEvent = procedure(Sender: TObject; ATask: TdxGanttControlTask; ANewValue: Integer; var AAccept: Boolean) of object;

#Parameters

Name Type Description
Sender TObject

The Chart View that raised the event.

ATask TdxGanttControlTask

The task whose progress a user is changing.

ANewValue Integer

The new value for ATask progress.

AAccept Boolean

Specifies if the event handler accepts or declines the task progress change.

#Remarks

You can open the Features Demo and modify its code. Handle the OnPercentCompleteChange event and use the following code snippet that restricts users from decreasing the task progress percentage:

procedure TFeaturesDemoMainForm.GanttControlViewChartChangePercentComplete(Sender: TObject; ATask: TdxGanttControlTask; ANewValue: Integer; var AAccept: Boolean);
begin
  AAccept := ATask.PercentComplete < ANewValue;
end; 
See Also