TcxSchedulerCustomDrawEventEvent Type

The custom draw event handler for user events.

Declaration

TcxSchedulerCustomDrawEventEvent = procedure(Sender: TObject; ACanvas: TcxCanvas; AViewInfo: TcxSchedulerEventCellViewInfo; var ADone: Boolean) of object;

Parameters

Name	Type	Description
Sender	TObject	The View that raised the event.
ACanvas	TcxCanvas	The target user event’s canvas.
AViewInfo	TcxSchedulerEventCellViewInfo	The target user event’s ViewInfo information.
ADone	Boolean	Assign True to this parameter if you override the built-in event draw routine. Do not change the parameter value if you need only to complement the built-in draw routine with custom draw operations.

Remarks

Cast the Sender parameter value to the actual class to access all class-specific members.

Code Example

The following OnCustomDrawEvent event handler draws unchanged recurring user events in red:

Delphi

procedure TForm1.cxScheduler1CustomDrawEvent(Sender: TObject;
  ACanvas: TcxCanvas; AViewInfo: TcxSchedulerEventCellViewInfo;
  var ADone: Boolean);
begin
  if AViewInfo.Event.EventType = etOccurrence then
    begin
      AViewInfo.Transparent := True;
      ACanvas.FillRect(AViewInfo.Bounds, clRed);
    end;
end; 

C++

void __fastcall TForm1::cxScheduler1CustomDrawEvent(TObject *Sender,
  TcxCanvas *ACanvas, TcxSchedulerEventCellViewInfo *AViewInfo,
  bool &ADone)
{
  if (AViewInfo->Event->EventType == etOccurrence)
  {
    AViewInfo->Transparent = true;
    ACanvas->FillRect(AViewInfo->Bounds, clRed);
  }
} 

Note

You can custom draw individual parts of user events. Refer to the following topic for detailed information: Custom Drawing.

The scheduler control’s OnCustomDrawEvent event references the TcxSchedulerCustomDrawEventEvent type.