Don't connect to GraphUpdated more than once.

This happens if we call reload() more than once

diff --git a/src/postcapturemodel.cpp b/src/postcapturemodel.cpp
index 0eaf349..80d7f3a 100644 (file)
--- a/src/postcapturemodel.cpp
+++ b/src/postcapturemodel.cpp
@@ -70,7 +70,8 @@ const QDBusArgument& operator>>(const QDBusArgument& argument, Quad& t) {
 
 PostCaptureModel::PostCaptureModel(QObject *parent) :
   QAbstractListModel(parent),
-  m_connection(0) {
+  m_connection(0),
+  m_connected(false) {
 
   QHash<int, QByteArray> roles;
   roles.insert(Item, "item");
@@ -117,12 +118,20 @@ void PostCaptureModel::reload() {
   q.bindValue("equipment", equipment);
   exec(q);
 
-  QDBusConnection::sessionBus().connect(TRACKER_SERVICE, TRACKER_RESOURCE_PATH,
-                                       TRACKER_RESOURCE_INTERFACE, TRACKER_RESOURCE_SIGNAL,
-                                       TRACKER_RESOURCE_SIGNAL_SIGNATURE,
-                                       this, SLOT(graphUpdated(const QString&,
-                                                               const QList<Quad>&,
-                                                               const QList<Quad>&)));
+  if (!m_connected) {
+    const char *slot = SLOT(graphUpdated(const QString&,
+                                        const QList<Quad>&,
+                                        const QList<Quad>&));
+    m_connected = QDBusConnection::sessionBus().connect(TRACKER_SERVICE, TRACKER_RESOURCE_PATH,
+                                                       TRACKER_RESOURCE_INTERFACE,
+                                                       TRACKER_RESOURCE_SIGNAL,
+                                                       TRACKER_RESOURCE_SIGNAL_SIGNATURE,
+                                                       this, slot);
+  }
+
+  if (!m_connected) {
+    qmlInfo(this) << "Failed to connect to tracker " << TRACKER_RESOURCE_SIGNAL;
+  }
 }
 
 void PostCaptureModel::exec(QSparqlQuery& query) {

diff --git a/src/postcapturemodel.h b/src/postcapturemodel.h
index f74ee03..c9177e8 100644 (file)
--- a/src/postcapturemodel.h
+++ b/src/postcapturemodel.h
@@ -86,6 +86,8 @@ private:
 
   QList<PostCaptureModelItem *> m_items;
   QHash<int, PostCaptureModelItem *> m_hash;
+
+  bool m_connected;
 };
 
 class PostCaptureModelItem : public QObject {