OnBeginUpdate event

Applies to

dcFolderListView component.

Declaration

property OnBeginUpdate: TNotifyEvent;

Description

The OnBeginUpdate event occurs when the dcFolderListView needs to update (refresh) the list items which shows the content of directory, and is about to scan the directory for files to update itself.

If the directory contains too many files, the updating process can take rather long time. You can hook the OnBeginUpdate and OnEndUpdate events to amuse users by something while the FolderListView scans directory for files.

Example (shows the avi movie while the dcFolderListView refresh the directory contents)

{ Animate1.CommonAVI := aviFindFolder }

procedure TForm1.dcFolderListView1BeginUpdate(Sender: TObject);

begin

Animate1.Active := True;

Animate1.Visible := True;

end;

procedure TForm1.dcFolderListView1EndUpdate(Sender: TObject);

begin

Animate1.Visible := False;

Animate1.Active := False;

end;

See also

OnEndUpdate event and Refresh method.

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