gistfile1.txt

void QgsCompassPlugin::run()
{
  QDockWidget* dock = new QDockWidget("Compass", qGisInterface->mainWindow() );
  QgsCompassPluginGui *myQgsCompassPluginGui =
      new QgsCompassPluginGui( dock );
  dock->setWidget( myQgsCompassPluginGui );
  dock->setAttribute( Qt::WA_DeleteOnClose );
  dock->setFeatures(QDockWidget::DockWidgetClosable | QDockWidget::DockWidgetMovable | QDockWidget::DockWidgetFloatable);
  qGisInterface->addDockWidget( Qt::LeftDockWidgetArea, dock );
  dock->show();
}

///


class QgsCompassPluginGui : public QWidget, private Ui::QgsCompassPluginGuiBase
{