write to file added

Author: akshaybabloo

logger.cpp

@@ -311,6 +311,20 @@ void Logger::updateWaveValue(const QLowEnergyCharacteristic &info, const QByteAr
     if (doStream) {
         udpSocket->writeDatagram(line, QHostAddress::Broadcast, 45454);
     }
+
+    // Writes to DataLogger-(datetime in GMT).csv
+    if (isFileOpen) {
+        QTextStream out(file);
+        for (int i = 0; i < realValues.length(); ++i) {
+            if (i < realValues.length()) {
+                out << QString("%1,").arg(QString::number(realValues.value(i)));
+            } else {
+                out << QString("%1").arg(QString::number(realValues.value(i)));
+            }
+        }
+        out << Qt::endl;
+        file->flush();
+    }
 }
 
 void Logger::confirmedDescriptorWrite(const QLowEnergyDescriptor &info, const QByteArray &value) {
@@ -322,10 +336,6 @@ void Logger::confirmedDescriptorWrite(const QLowEnergyDescriptor &info, const QB
     }
 }
 
-void Logger::on_saveToFileButton_clicked() {
-
-}
-
 void Logger::countFrequency() {
     frequencyCheckDone = true;
     qInfo() << "frequency is " << frequencyCounter;
@@ -350,3 +360,21 @@ void Logger::errorService(QLowEnergyService::ServiceError error) {
     qWarning() << "Service Error: " << error;
 }
 
+
+void Logger::on_saveToFileButton_toggled(bool checked) {
+    if (checked) {
+        ui->saveToFileButton->setText("Stop Writing");
+        auto fileName = QDir(
+                QDir::fromNativeSeparators(QStandardPaths::writableLocation(QStandardPaths::DesktopLocation)) +
+                QString("/DataLogger-%1.csv").arg(QDateTime::currentDateTimeUtc().toString()));
+        file = new QFile(fileName.path());
+        file->open(QIODevice::Append | QIODevice::Text);
+    } else {
+        ui->saveToFileButton->setText("Write to File");
+        file->flush();
+        file->close();
+    }
+
+    isFileOpen = checked;
+}
+

logger.h

@@ -49,7 +49,7 @@ private slots:
     void on_actionAbout_DataBlogger_triggered();
     void on_actionSettings_triggered();
     void on_serverButton_toggled(bool checked);
-    void on_saveToFileButton_clicked();
+    void on_saveToFileButton_toggled(bool checked);
 
     void serviceStateChanged(QLowEnergyService::ServiceState newState);
     void updateWaveValue(const QLowEnergyCharacteristic &info, const QByteArray &value);
@@ -83,6 +83,10 @@ private slots:
     QUdpSocket *udpSocket = nullptr;
     bool doStream = false;
 
+    // For writing data to file
+    bool isFileOpen = false;
+    QFile *file = nullptr;
+
     // get the stream frequency
     QTimer *timer = nullptr;
     quint32 frequencyCounter = 0;

logger.ui

@@ -68,7 +68,10 @@
            <string/>
           </property>
           <property name="text">
-           <string>Save to File</string>
+           <string>Write to File</string>
+          </property>
+          <property name="checkable">
+           <bool>true</bool>
           </property>
          </widget>
         </item>