Add logging of incoming MIDI to file

Author: Tom Steer

UdpMidiTest.pro

@@ -18,7 +18,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-PRODUCT_VERSION = 1.0.1
+PRODUCT_VERSION = 1.0.2
 
 QT       += core gui network xml svg
 

src/mainwindow.cpp

@@ -26,6 +26,11 @@
 #include <QNetworkDatagram>
 #include <QMetaEnum>
 #include <QDebug>
+#include <QFileDialog>
+#include <QDate>
+#include <QDateTime>
+#include <QAbstractEventDispatcher>
+#include <QTimer>
 
 QByteArray eosEncode(float value)
 {
@@ -53,6 +58,17 @@ QString stringToHex(quint8 value)
     return result.toUpper();
 }
 
+
+static int msecsTo(const QTime & at) {
+  const int msecsPerDay = 24 * 60 * 60 * 1000;
+  int msecs = QTime::currentTime().msecsTo(at);
+  if (msecs < 0) msecs += msecsPerDay;
+  return msecs;
+}
+
+
+
+
 MainWindow::MainWindow(QWidget *parent) :
     QMainWindow(parent),
     ui(new Ui::MainWindow)
@@ -120,6 +136,9 @@ MainWindow::MainWindow(QWidget *parent) :
     connect(ui->cbMSCCommand, SIGNAL(currentIndexChanged(int)), this, SLOT(updateMscCommand()));
     connect(ui->cbMSCCommandFormat, SIGNAL(currentIndexChanged(int)), this, SLOT(updateMscCommand()));
     connect(ui->leMSCData, SIGNAL(textChanged(QString)), this, SLOT(updateMscCommand()));
+
+    updateLogFileDisplay();
+
 }
 
 MainWindow::~MainWindow()
@@ -195,6 +214,7 @@ void MainWindow::readData()
 {
     while (m_rxSocket->hasPendingDatagrams())
     {
+        m_msgCounter++;
         QNetworkDatagram datagram = m_rxSocket->receiveDatagram();
 
         if(ui->cbLogAllInput->isChecked())
@@ -205,6 +225,16 @@ void MainWindow::readData()
                                   .arg(QString(datagram.data()))
                                   );
         }
+        if(m_logFile)
+        {
+            QString logMsg = QString("%1,%2,%3\r\n")
+                    .arg(QTime::currentTime().toString("hh:mm:ss:zzz"))
+                    .arg(datagram.senderAddress().toString())
+                    .arg(QString::fromLatin1(datagram.data()));
+            m_logFile->write(logMsg.toUtf8());
+            m_logFile->flush();
+            updateLogFileDisplay();
+        }
 
 
         midiMessageRecieve(datagram.data());
@@ -443,3 +473,66 @@ void MainWindow::on_btnMSCSend_pressed()
 {
     midiMessageSend((quint8*)m_mscCommand.data(), m_mscCommand.length());
 }
+
+void MainWindow::on_cbLogToFile_pressed()
+{
+    m_msgCounter = 0;
+    if(!ui->cbLogToFile->isChecked())
+    {
+        m_logFileName = QFileDialog::getSaveFileName(this, tr("Save Log File"), QString(), tr("Log Files (*.log)"));
+        if(m_logFileName.isEmpty())
+        {
+            m_logFileName = "";
+            m_logFile = Q_NULLPTR;
+            ui->cbLogToFile->setChecked(false);
+            return;
+        }
+        m_logFileName.chop(3); // Remove the .log postfix
+        rotateLogFile();
+        ui->cbLogToFile->setChecked(true);
+
+
+        // Rotate the log at midnight
+        auto timer = new QTimer(QAbstractEventDispatcher::instance());
+        timer->start(msecsTo(QTime(0,0,0)));
+        QObject::connect(timer, &QTimer::timeout, [=, &timer]{
+          this->rotateLogFile();
+          timer->deleteLater();
+        });
+    }
+    else {
+        ui->lbLogInfo->clear();
+    }
+}
+
+void MainWindow::rotateLogFile()
+{
+    if(m_logFile)
+    {
+        m_logFile->close();
+        m_logFile = Q_NULLPTR;
+    }
+
+    QString fileName = m_logFileName + QString("%1.log").arg(QDate::currentDate().toString("yy_MM_dd"));
+
+    m_logFile = new QFile(fileName);
+    if(!m_logFile->open(QIODevice::WriteOnly))
+    {
+        ui->cbLogToFile->setChecked(false);
+        m_logFile = Q_NULLPTR;
+    }
+    updateLogFileDisplay();
+
+}
+
+void MainWindow::updateLogFileDisplay()
+{
+    if(!m_logFile)
+        ui->lbLogInfo->clear();
+    else {
+       QString logInfo = tr("Logging to %1 : %2 messages")
+               .arg(m_logFile->fileName())
+               .arg(m_msgCounter);
+       ui->lbLogInfo->setText(logInfo);
+    }
+}

src/mainwindow.h

@@ -24,6 +24,7 @@
 #include <QMainWindow>
 #include <QTimer>
 #include <QUdpSocket>
+#include <QFile>
 #include "windows.h"
 
 namespace Ui {
@@ -48,7 +49,10 @@ private slots:
     void on_leMSCData_textChanged(const QString &text);
     void updateMscCommand();
     void on_btnMSCSend_pressed();
+    void on_cbLogToFile_pressed();
 private:
+    void rotateLogFile();
+    void updateLogFileDisplay();
     Ui::MainWindow *ui;
     QUdpSocket *m_txSocket;
     QUdpSocket *m_rxSocket;
@@ -57,6 +61,9 @@ private slots:
     void midiMessageRecieve(const QByteArray &data);
     QByteArray m_mscCommand;
     QByteArray m_mscData;
+    QString m_logFileName;
+    QFile *m_logFile = Q_NULLPTR;
+    int m_msgCounter = 0;
 };
 
 

src/mainwindow.ui

@@ -100,7 +100,7 @@
     <item>
      <widget class="QTabWidget" name="tabWidget">
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <widget class="QWidget" name="tab">
        <attribute name="title">
@@ -119,7 +119,7 @@
            <item row="1" column="0">
             <widget class="QTabWidget" name="tabWidget_2">
              <property name="currentIndex">
-              <number>1</number>
+              <number>0</number>
              </property>
              <widget class="QWidget" name="tab_3">
               <attribute name="title">
@@ -319,10 +319,48 @@ font: 8pt &quot;Courier New&quot;;</string>
         <item>
          <widget class="QCheckBox" name="cbLogAllInput">
           <property name="text">
-           <string>Log All Messages</string>
+           <string>Display All Messages</string>
           </property>
          </widget>
         </item>
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout_3">
+          <item>
+           <widget class="QCheckBox" name="cbLogToFile">
+            <property name="text">
+             <string>Log to file</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="Line" name="line">
+            <property name="orientation">
+             <enum>Qt::Vertical</enum>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QLabel" name="lbLogInfo">
+            <property name="text">
+             <string>Logging to : %1 : 1234 Messages</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <spacer name="horizontalSpacer_4">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+            <property name="sizeHint" stdset="0">
+             <size>
+              <width>40</width>
+              <height>20</height>
+             </size>
+            </property>
+           </spacer>
+          </item>
+         </layout>
+        </item>
         <item>
          <widget class="QListWidget" name="lvRxMessages"/>
         </item>