diff --git a/piqt_utils/piqt_iodevice_edit.cpp b/piqt_utils/piqt_iodevice_edit.cpp
index 65cedbb..0fb094f 100644
--- a/piqt_utils/piqt_iodevice_edit.cpp
+++ b/piqt_utils/piqt_iodevice_edit.cpp
@@ -4,6 +4,8 @@
 #include <QLineEdit>
 #include <QToolButton>
 #include <QBoxLayout>
+#include <piqt.h>
+#include <piiodevice.h>
 
 
 IODeviceEdit::IODeviceEdit(QWidget * parent): QWidget(parent) {
@@ -73,4 +75,18 @@ public:
 
 __IODeviceEditRegistrator__::__IODeviceEditRegistrator__() {
 	QVariantEditorFactories::registerEditorFactory(qMetaTypeId<QAD::IODevice>(), new Factory());
+	__QADTypesRegistrator__::instance()->toString_funcs.insert(qMetaTypeId<QAD::IODevice>(), &QAD_IODevice_toString);
+}
+
+
+void QAD_IODevice_toString(const QVariant & v, QString & r) {
+	PIVariantTypes::IODevice sd = Q2PIVariant(v).toIODevice();
+//	piCout << sd;
+	PIIODevice * rd = PIIODevice::createFromVariant(sd);
+	if (rd) {
+		PIString ps = rd->constructFullPath();
+		r = PI2QString(ps);
+	} else {
+		piCout << "error in " << sd;
+	}
 }
diff --git a/piqt_utils/piqt_iodevice_edit.h b/piqt_utils/piqt_iodevice_edit.h
index 95ca616..8a64e36 100644
--- a/piqt_utils/piqt_iodevice_edit.h
+++ b/piqt_utils/piqt_iodevice_edit.h
@@ -48,4 +48,5 @@ public:
 
 static __IODeviceEditRegistrator__ __iodeviceeditregistrator__;
 
+void QAD_IODevice_toString(const QVariant & v, QString & r);
 #endif // PIQT_IODEVICE_EDIT_H
diff --git a/qad/utils/qad_types.cpp b/qad/utils/qad_types.cpp
index cc23f13..afaa84c 100644
--- a/qad/utils/qad_types.cpp
+++ b/qad/utils/qad_types.cpp
@@ -10,6 +10,16 @@
 
 bool __QADTypesRegistrator__::_inited = false;
 
+
+__QADTypesRegistrator__::__QADTypesRegistrator__(int) {
+	instance()->_inited = true;
+}
+
+__QADTypesRegistrator__ *__QADTypesRegistrator__::instance() {
+	static __QADTypesRegistrator__ ret;
+	return &ret;
+}
+
 __QADTypesRegistrator__::__QADTypesRegistrator__() {
 	if (_inited) return;
 	_inited = true;
@@ -38,7 +48,7 @@ __QADTypesRegistrator__::__QADTypesRegistrator__() {
 #endif
 }
 
-__QADTypesRegistrator__ __registrator__;
+__QADTypesRegistrator__ __registrator__(1);
 
 
 int QAD::Enum::selectedValue() const {
@@ -124,26 +134,36 @@ QAD::Enum & QAD::Enum::operator <<(const QStringList & v) {
 
 QString QAD::IODevice::toString() const {
 	QString s;
-	s += "IODevice(" + prefix + ", ";
-	int rwc = 0;
-	if (mode & QIODevice::ReadOnly) {s += "r"; ++rwc;}
-	if (mode & QIODevice::WriteOnly) {s += "w"; ++rwc;}
-	if (rwc == 1) s += "o";
-	if (options != 0) {
-		if (options & 1)
-			s += " br";
-		if (options & 2)
-			s += " bw";
+	if (__QADTypesRegistrator__::instance()->toString_funcs.contains(qMetaTypeId<QAD::IODevice>())) {
+		QVariant v;
+		v.setValue(*this);
+		(*(__QADTypesRegistrator__::instance()->toString_funcs[qMetaTypeId<QAD::IODevice>()]))(v, s);
+		return s;
+	} else {
+//		s += "IODevice(" + prefix + ", mode=";
+//		int rwc = 0;
+//		if (mode & QIODevice::ReadOnly) {s += "r"; ++rwc;}
+//		if (mode & QIODevice::WriteOnly) {s += "w"; ++rwc;}
+//		if (rwc == 1) s += "o";
+//		if (options != 0) {
+//			s += ", flags=";
+//			if (options & 1)
+//				s += "br";
+//			if (options & 2)
+//				if (options & 1)
+//					s+= "|";
+//				s += "bw";
+//		}
+//		PropertyStorage ps = props;
+//		foreach (const PropertyStorage::Property & p, ps) {
+//			QString vs = p.value.toString();
+//			if (p.value.type() == QVariant::StringList)
+//				vs = p.value.toStringList().join(";");
+//			s += ", " + p.name + "=\"" + vs + "\"";
+//		}
+//		s += ")";
+		return s;
 	}
-	PropertyStorage ps = props;
-	foreach (const PropertyStorage::Property & p, ps) {
-		QString vs = p.value.toString();
-		if (p.value.type() == QVariant::StringList)
-			vs = p.value.toStringList().join(";");
-		s += ", " + p.name + "=\"" + vs + "\"";
-	}
-	s += ")";
-	return s;
 }
 
 
diff --git a/qad/utils/qad_types.h b/qad/utils/qad_types.h
index 761315a..aade459 100644
--- a/qad/utils/qad_types.h
+++ b/qad/utils/qad_types.h
@@ -89,6 +89,10 @@ inline QDebug operator <<(QDebug s, const QAD::IODevice & v) {s.nospace() << v.t
 
 class __QADTypesRegistrator__ {
 public:
+	__QADTypesRegistrator__(int);
+	static __QADTypesRegistrator__ * instance();
+	QMap<int, void(*)(const QVariant &, QString &)> toString_funcs;
+private:
 	__QADTypesRegistrator__();
 	static bool _inited;
 };