[netcdf] add file info for import dialog

Author: gerlachs

compile_debug

@@ -8,4 +8,4 @@ fi
 
 cd $BUILDDIR
 
-cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=/usr && make -j 4
+cmake .. -DCMAKE_BUILD_TYPE=Debug -DENABLE_NETCDF=OFF -DCMAKE_INSTALL_PREFIX=/usr && make -j 4

src/backend/datasources/filters/FITSFilter.cpp

@@ -248,7 +248,7 @@ void FITSFilter::setExportTo(const int exportTo) {
 
 QString FITSFilter::fileInfoString(const QString& fileName) {
 	const int imagesCount = FITSFilterPrivate::extensionNames(fileName).values(QLatin1String("IMAGES")).size();
-	QString info(i18n("Images: %1", QString::number(imagesCount )));
+	QString info(i18n("Images: %1", QString::number(imagesCount)));
 
 	info += QLatin1String("<br>");
 

src/backend/datasources/filters/NetCDFFilter.cpp

@@ -137,6 +137,53 @@ int NetCDFFilter::endColumn() const {
 	return d->endColumn;
 }
 
+QString NetCDFFilter::fileInfoString(const QString& fileName) {
+	DEBUG("NetCDFFilter::fileInfoString()");
+
+	QByteArray bafileName = fileName.toLatin1();
+	DEBUG("fileName = " << bafileName.data());
+
+	QString info;
+#ifdef HAVE_NETCDF
+	int ncid, status;
+	status = nc_open(bafileName.data(), NC_NOWRITE, &ncid);
+	NetCDFFilterPrivate::handleError(status, "nc_open");
+	if (status != NC_NOERR) {
+		DEBUG("	File error. Giving up");
+		return QString();
+	}
+
+	int ndims, nvars, nattr, uldid;
+	status = nc_inq(ncid, &ndims, &nvars, &nattr, &uldid);
+	NetCDFFilterPrivate::handleError(status, "nc_inq");
+	DEBUG(" nattr/ndims/nvars = " << nattr << ' ' << ndims << ' '  << nvars);
+
+	if (status == NC_NOERR) {
+		info += i18n("Number of global attributes: %1", QString::number(nattr));
+		info += QLatin1String("<br>");
+		info += i18n("Number of dimensions: %1", QString::number(ndims));
+		info += QLatin1String("<br>");
+		info += i18n("Number of variables: %1", QString::number(nvars));
+		info += QLatin1String("<br>");
+
+		int format;
+		status = nc_inq_format(ncid, &format);
+		if (status == NC_NOERR)
+			info += i18n("Format version: %1", NetCDFFilterPrivate::translateFormat(format));
+		info += QLatin1String("<br>");
+
+		info += i18n("Using library version %1", QString(nc_inq_libvers()));
+	} else {
+		info += i18n("Error getting file info");
+	}
+
+	status = ncclose(ncid);
+	NetCDFFilterPrivate::handleError(status, "nc_close");
+#endif
+
+	return info;
+}
+
 //#####################################################################
 //################### Private implementation ##########################
 //#####################################################################
@@ -150,7 +197,7 @@ NetCDFFilterPrivate::NetCDFFilterPrivate(NetCDFFilter* owner) : q(owner) {
 #ifdef HAVE_NETCDF
 void NetCDFFilterPrivate::handleError(int err, const QString& function) {
 	if (err != NC_NOERR)
-		qDebug() << "NETCDF ERROR:" << function << "() - " << nc_strerror(m_status);
+		qDebug() << "NETCDF ERROR:" << function << "() - " << nc_strerror(err);
 }
 
 QString NetCDFFilterPrivate::translateDataType(nc_type type) {
@@ -200,6 +247,27 @@ QString NetCDFFilterPrivate::translateDataType(nc_type type) {
 	return typeString;
 }
 
+QString NetCDFFilterPrivate::translateFormat(int format) {
+	QString formatString;
+
+	switch (format) {
+	case NC_FORMAT_CLASSIC:
+		formatString = "NC_FORMAT_CLASSIC";
+		break;
+	case NC_FORMAT_64BIT:
+		formatString = "NC_FORMAT_64BIT";
+		break;
+	case NC_FORMAT_NETCDF4:
+		formatString = "NC_FORMAT_NETCDF4";
+		break;
+	case NC_FORMAT_NETCDF4_CLASSIC:
+		formatString = "NC_FORMAT_NETCDF4_CLASSIC";
+		break;
+	}
+
+	return formatString;
+}
+
 QString NetCDFFilterPrivate::scanAttrs(int ncid, int varid, int attid, QTreeWidgetItem* parentItem) {
 	char name[NC_MAX_NAME + 1];
 

src/backend/datasources/filters/NetCDFFilter.h

@@ -61,6 +61,8 @@ class NetCDFFilter : public AbstractFileFilter {
 	void setEndColumn(const int);
 	int endColumn() const;
 
+	static QString fileInfoString(const QString&);
+
 	void save(QXmlStreamWriter*) const override;
 	bool load(XmlStreamReader*) override;
 

src/backend/datasources/filters/NetCDFFilterPrivate.h

@@ -45,6 +45,11 @@ class NetCDFFilterPrivate {
 	QVector<QStringList> readCurrentVar(const QString& fileName, AbstractDataSource* = nullptr,
 			AbstractFileFilter::ImportMode = AbstractFileFilter::Replace, int lines = -1);
 	void write(const QString& fileName, AbstractDataSource*);
+#ifdef HAVE_NETCDF
+	static void handleError(int status, const QString& function);
+	static QString translateFormat(int format);
+	static QString translateDataType(nc_type type);
+#endif
 
 	const NetCDFFilter* q;
 
@@ -58,8 +63,6 @@ class NetCDFFilterPrivate {
 #ifdef HAVE_NETCDF
 	int m_status;
 
-	void handleError(int status, const QString& function);
-	QString translateDataType(nc_type type);
 	QString scanAttrs(int ncid, int varid, int attid, QTreeWidgetItem* parentItem = nullptr);
 	void scanDims(int ncid, int ndims, QTreeWidgetItem* parentItem);
 	void scanVars(int ncid, int nvars, QTreeWidgetItem* parentItem);

src/kdefrontend/datasources/FileInfoDialog.cpp

@@ -30,6 +30,7 @@
 #include "FileInfoDialog.h"
 #include "backend/datasources/LiveDataSource.h"
 #include "backend/datasources/filters/AsciiFilter.h"
+#include "backend/datasources/filters/NetCDFFilter.h"
 #include "backend/datasources/filters/FITSFilter.h"
 #include "backend/datasources/filters/NgspiceRawAsciiFilter.h"
 
@@ -169,7 +170,7 @@ QString FileInfoDialog::fileInfoString(const QString& name) const {
 			//TODO infoStrings << HDF5Filter::fileInfoString(fileName);
 			break;
 		case AbstractFileFilter::NETCDF:
-			//TODO infoStrings << NETCDFFilter::fileInfoString(fileName);
+			infoStrings << NetCDFFilter::fileInfoString(fileName);
 			break;
 		case AbstractFileFilter::FITS:
 			infoStrings << FITSFilter::fileInfoString(fileName);