comparison layer/SpectrogramLayer.cpp @ 316:c0b9eec70639

* Make XmlExportable::toXml the function that is universally overridden (and
  pure virtual) instead of toXmlString.  Tidies up some classes, notably the
  model classes, significantly.  Closes #1794561.

 #include <QRect>
 #include <QTimer>
 #include <QApplication>
 #include <QMessageBox>
 #include <QMouseEvent>
+#include <QTextStream>
 
 #include <iostream>
 
 #include <cassert>
 #include <cmath>

     }
 //    std::cerr << "SpectrogramLayer::setMeasureRectYCoord: start " << r.startY << " <- " << y << ", end " << r.endY << " <- " << y << std::endl;
 
 }
 
-QString
-SpectrogramLayer::toXmlString(QString indent, QString extraAttributes) const
+void
+SpectrogramLayer::toXml(QTextStream &stream,
+                        QString indent, QString extraAttributes) const
 {
     QString s;
     
     s += QString("channel=\"%1\" "
 		 "windowSize=\"%2\" "

 	.arg(m_frequencyScale)
 	.arg(m_binDisplay)
 	.arg(m_normalizeColumns ? "true" : "false")
         .arg(m_normalizeVisibleArea ? "true" : "false");
 
-    return Layer::toXmlString(indent, extraAttributes + " " + s);
+    Layer::toXml(stream, indent, extraAttributes + " " + s);
 }
 
 void
 SpectrogramLayer::setProperties(const QXmlAttributes &attributes)
 {