Improved error handling.

Code cleanup.

src/gui.cpp

@@ -673,12 +673,13 @@ void GUI::openPOIFile()
 
 bool GUI::openPOIFile(const QString &fileName)
 {
-	if (fileName.isEmpty())
+	if (fileName.isEmpty() || _poi->files().contains(fileName))
 		return false;
 
 	if (!_poi->loadFile(fileName)) {
-		QString error = tr("Error loading POI file:\n%1")
+		QString error = fileName + QString("\n\n")
-		  .arg(_poi->errorString()) + QString("\n");
+		  + tr("Error loading POI file:\n%1").arg(_poi->errorString())
+		  + QString("\n");
 		if (_poi->errorLine())
 			error.append(tr("Line: %1").arg(_poi->errorLine()));
 		QMessageBox::critical(this, tr("Error"), error);

src/pathview.cpp

@@ -315,12 +315,12 @@ void PathView::rescale(qreal scale)
 void PathView::setPOI(POI *poi)
 {
 	if (_poi)
-		disconnect(_poi, SIGNAL(reloadRequired()), this, SLOT(updatePOI()));
+		disconnect(_poi, SIGNAL(pointsChanged()), this, SLOT(updatePOI()));
 
 	_poi = poi;
 
 	if (_poi)
-		connect(_poi, SIGNAL(reloadRequired()), this, SLOT(updatePOI()));
+		connect(_poi, SIGNAL(pointsChanged()), this, SLOT(updatePOI()));
 
 	updatePOI();
 }

src/poi.cpp

@@ -22,16 +22,15 @@ bool POI::loadFile(const QString &fileName)
 	_error.clear();
 	_errorLine = 0;
 
-
 	if (loadCSVFile(fileName)) {
-		emit reloadRequired();
+		emit pointsChanged();
 		return true;
 	} else {
 		error = _error;
 		errorLine = _errorLine;
 	}
 	if (loadGPXFile(fileName)) {
-		emit reloadRequired();
+		emit pointsChanged();
 		return true;
 	}
 
@@ -99,20 +98,20 @@ bool POI::loadCSVFile(const QString &fileName)
 		QByteArray line = file.readLine();
 		QList<QByteArray> list = line.split(',');
 		if (list.size() < 3) {
-			_error = "Parse error";
+			_error = "Parse error.";
 			_errorLine = ln;
 			return false;
 		}
 
 		qreal lat = list[0].trimmed().toDouble(&ret);
 		if (!ret) {
-			_error = "Invalid latitude";
+			_error = "Invalid latitude.";
 			_errorLine = ln;
 			return false;
 		}
 		qreal lon = list[1].trimmed().toDouble(&ret);
 		if (!ret) {
-			_error = "Invalid longitude";
+			_error = "Invalid longitude.";
 			_errorLine = ln;
 			return false;
 		}
@@ -251,7 +250,7 @@ void POI::enableFile(const QString &fileName, bool enable)
 		}
 	}
 
-	emit reloadRequired();
+	emit pointsChanged();
 }
 
 void POI::clear()
@@ -261,12 +260,12 @@ void POI::clear()
 	_files.clear();
 	_indexes.clear();
 
-	emit reloadRequired();
+	emit pointsChanged();
 }
 
 void POI::setRadius(qreal radius)
 {
 	_radius = radius;
 
-	emit reloadRequired();
+	emit pointsChanged();
 }

src/poi.h

@@ -34,7 +34,7 @@ public:
 	void clear();
 
 signals:
-	void reloadRequired();
+	void pointsChanged();
 
 private:
 	typedef RTree<size_t, qreal, 2> POITree;