We sloved two wide-pointer problem.

qtviewer_planetosm/osmtiles/layer_tiles.cpp

@@ -123,8 +123,10 @@ namespace QTVOSM{
 		m_downloadThread->quit();
 		m_downloadThread->wait();
 		m_downloader->deleteLater();
-		if (m_propPage)
-			m_propPage->deleteLater();
+		//! m_propPage is a child object of other widgets,
+		//! it will be deleted automatically.
+		//if (m_propPage)
+		//	m_propPage->deleteLater();
 	}
 
 	bool layer_tiles::cb_mousePressEvent ( QMouseEvent * event )

qtviewer_planetosm/qtaxviewer_planetosm.cpp

@@ -269,6 +269,8 @@ void qtaxviewer_planetosm::_next_pending_evts()
 		e = & *m_list_events.constBegin();
 	m_mutex_evts.unlock();
 
+	if (e)
+	{
 		QString str_props;
 		//!3,Extract props.just put it into str_prop, split by ;
 		for(QMap<QString, QVariant>::const_iterator p = e->begin();p!=e->end();++p)
@@ -280,10 +282,12 @@ void qtaxviewer_planetosm::_next_pending_evts()
 		}
 		//!5,Fire the OCX Event
 		emit evt_Message(str_props);
+	}
 
 	//pop from queue
 	m_mutex_evts.lock();
 	e = 0;
+	if (m_list_events.empty()==false)
 		m_list_events.pop_front();
 	if (m_list_events.size())
 		needFire = true;