1 files changed, 36 insertions, 0 deletions
diff --git a/src/qt/monitoreddatamapper.cpp b/src/qt/monitoreddatamapper.cpp
new file mode 100644
index 0000000000..88948d07bf
--- /dev/null
+++ b/src/qt/monitoreddatamapper.cpp
@@ -0,0 +1,36 @@
+#include "monitoreddatamapper.h"
+
+#include <QWidget>
+#include <QMetaObject>
+#include <QMetaProperty>
+
+MonitoredDataMapper::MonitoredDataMapper(QObject *parent) :
+    QDataWidgetMapper(parent)
+{
+}
+
+
+void MonitoredDataMapper::addMapping(QWidget *widget, int section)
+{
+    QDataWidgetMapper::addMapping(widget, section);
+    addChangeMonitor(widget);
+}
+
+void MonitoredDataMapper::addMapping(QWidget *widget, int section, const QByteArray &propertyName)
+{
+    QDataWidgetMapper::addMapping(widget, section, propertyName);
+    addChangeMonitor(widget);
+}
+
+void MonitoredDataMapper::addChangeMonitor(QWidget *widget)
+{
+    // Watch user property of widget for changes, and connect
+    //  the signal to our viewModified signal.
+    QMetaProperty prop = widget->metaObject()->userProperty();
+    int signal = prop.notifySignalIndex();
+    int method = this->metaObject()->indexOfMethod("viewModified()");
+    if(signal != -1 && method != -1)
+    {
+        QMetaObject::connect(widget, signal, this, method);
+    }
+}