added network monitoring

shows network errors and updates status on reconnect

1 files changed, 34 insertions, 5 deletions

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)