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

@@ -269,22 +269,26 @@ void qtaxviewer_planetosm::_next_pending_evts()
 		e = & *m_list_events.constBegin();
 	m_mutex_evts.unlock();
 
-	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)
+	if (e)
 	{
-		str_props += p.key();
-		str_props +="=";
-		str_props +=p.value().toString();
-		str_props +=";";
+		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)
+		{
+			str_props += p.key();
+			str_props +="=";
+			str_props +=p.value().toString();
+			str_props +=";";
+		}
+		//!5,Fire the OCX Event
+		emit evt_Message(str_props);
 	}
-	//!5,Fire the OCX Event
-	emit evt_Message(str_props);
 
 	//pop from queue
 	m_mutex_evts.lock();
 	e = 0;
-	m_list_events.pop_front();
+	if (m_list_events.empty()==false)
+		m_list_events.pop_front();
 	if (m_list_events.size())
 		needFire = true;
 	m_mutex_evts.unlock();