1 files changed, 61 insertions, 0 deletions
diff --git a/singleapplication.cpp b/singleapplication.cpp
new file mode 100644
index 0000000..7e63371
--- /dev/null
+++ b/singleapplication.cpp
@@ -0,0 +1,61 @@
+#include "singleapplication.h"
+
+/**
+ * @brief SingleApplication::SingleApplication
+ *  Constructor. Checks and fires up LocalServer or closes the program
+ *  if another instance already exists
+ * @param argc
+ * @param argv
+ */
+SingleApplication::SingleApplication(int argc, char *argv[]) :
+  QGuiApplication(argc, argv)
+{
+  _shouldContinue = false; // By default this is not the main process
+
+  socket = new QLocalSocket();
+
+  // Attempt to connect to the LocalServer
+  socket->connectToServer(LOCAL_SERVER_NAME);
+  if(socket->waitForConnected(100)){
+    socket->write("CMD:showUp");
+    socket->flush();
+    QThread::msleep(100);
+    socket->close();
+  } else {
+    // The attempt was insuccessful, so we continue the program
+    _shouldContinue = true;
+    server = new LocalServer();
+    server->start();
+    QObject::connect(server, SIGNAL(showUp()), this, SLOT(slotShowUp()));
+  }
+}
+
+/**
+ * @brief SingleApplication::~SingleApplication
+ *  Destructor
+ */
+Application::~SingleApplication()
+{
+  if(_shouldContinue){
+    server->terminate();
+  }
+}
+
+/**
+ * @brief SingleApplication::shouldContinue
+ *  Weather the program should be terminated
+ * @return bool
+ */
+bool SingleApplication::shouldContinue()
+{
+  return _shouldContinue;
+}
+
+/**
+ * @brief SingleApplication::slotShowUp
+ *  Executed when the showUp command is sent to LocalServer
+ */
+void SingleApplication::slotShowUp()
+{
+  emit showUp();
+}