From 950bf7952bd31c64fb0e5536daec4c6881276d74 Mon Sep 17 00:00:00 2001
From: Max Christian Pohle
Date: Mon, 30 Nov 2015 02:35:31 +0100
Subject: added network monitoring

shows network errors and updates status on reconnect
---
 main.cpp       |  1 +
 mainwindow.cpp | 39 ++++++++++++++++++++++++++++++++++-----
 mainwindow.h   |  8 ++++++++
 3 files changed, 43 insertions(+), 5 deletions(-)

diff --git a/main.cpp b/main.cpp
index 0e12450..68af217 100644
--- a/main.cpp
+++ b/main.cpp
@@ -4,6 +4,7 @@
 #include <QMetaObject>
 
 
+
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 6149e0c..b27876c 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -2,6 +2,21 @@
 #include "ui_mainwindow.h"
 #include <QDebug>
 
+void MainWindow::onNetworkConfigurationChanged()
+{
+    qDebug() << "configuration changed\n";
+    if(this->mgr->isOnline())
+    {
+        if(this->ui->comboBox->count() == 0)
+        {
+            this->updateSpaceList();
+            this->updateStatus();
+        }
+        else
+            this->updateStatus();
+    }
+}
+
 MainWindow::MainWindow(QWidget *parent) :
     QMainWindow(parent),
     ui(new Ui::MainWindow)
@@ -21,12 +36,30 @@ MainWindow::MainWindow(QWidget *parent) :
 
 
     this->timer = new QTimer();
-    this->connect(this->timer, SIGNAL(timeout()), this, SLOT(updateStatus()));
+    this->connect(this->timer, SIGNAL(timeout()), this, SLOT(updateSpaceList()));
     // update every five minutes...
     this->timer->start(60000 * 5);
 
     //this->pixmap = new QPixmap(120, 120);
     //this->currentIcon = new QIcon(this->pixmap);
+
+    this->mgr = new QNetworkConfigurationManager();
+    connect(this->mgr,
+          SIGNAL(configurationChanged(const QNetworkConfiguration &)),
+          this,
+          SLOT(onNetworkConfigurationChanged()));
+
+    connect(this->mgr, &QNetworkConfigurationManager::onlineStateChanged,
+            [=] (bool b)
+            {
+                if(!b)
+                {
+                    this->qsystemtrayicon->setIcon(QIcon::fromTheme("network-error"));
+                    this->qsystemtrayicon->showMessage("Offline", "The network connection was lost :(");
+                }
+
+            });
+
 }
 
 MainWindow::~MainWindow()
@@ -56,10 +89,6 @@ void MainWindow::updateSpaceList()
     }
     ui->comboBox->setDisabled(false);
 
-    // in case of a bad network connection the combobox might show an element
-    // but does not download data. clicking refresh does not solve that, because
-    // setCurrentIndex does not trigger a refresh in that (rare) case...
-    this->updateStatus(); // fixes case where setCurrentIndex does not call on_comboBox_currentIndexChanged
 }
 
 QJsonObject json_find(QJsonObject json, QStringList list)
diff --git a/mainwindow.h b/mainwindow.h
index 305b79b..916f95b 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -26,6 +26,10 @@
 #include <QTimer>
 
 #include <QApplication>
+#include <QNetworkSession>
+#include <QNetworkConfigurationManager>
+
+
 
 namespace Ui {
 class MainWindow;
@@ -47,6 +51,7 @@ private:
     QTimer* timer;
     void saveSettings();
     QByteArray download(QUrl url);
+    QNetworkConfigurationManager* mgr;
 
 
 private slots:
@@ -55,6 +60,9 @@ private slots:
     void updateStatus();
     void updateSpaceList();
     void exitApplication();
+    //void stateChanged(QNetworkSession::State);
+    //void onlineStateChanged(bool);
+    void onNetworkConfigurationChanged();
 };
 
 #endif // MAINWINDOW_H
-- 
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