implemented MidiProbe-Class

MidiProbe.cpp

@@ -0,0 +1,45 @@
+#include "MidiProbe.h"
+#include <QErrorMessage>
+#include <string>
+
+MidiProbe::MidiProbe()
+{
+    midiin = new RtMidiIn();
+    portCount = midiin->getPortCount();
+}
+
+unsigned int MidiProbe::getPort()
+{
+    QString selectedPort = "";
+    unsigned int i=0;
+    if(portCount==0)
+    {
+        QErrorMessage * message = new QErrorMessage();
+        message->setWindowTitle("Fehler!");
+        message->setWindowFlags(message->windowFlags()^Qt::WindowContextHelpButtonHint);
+        message->setModal(true);
+        message->showMessage("Keine MIDI-Geräte erkannt!");
+    }
+    else if(portCount == 1)     //automatically select port 0 if it is the only one
+    {
+        return(0);
+    }
+    else if(portCount == 2)     // let user select port
+    {
+        for(i=0; i<portCount; i++)
+            midiDevices.push_back(QString::fromStdString(midiin->getPortName(i)));
+
+        QInputDialog * dialog = new QInputDialog();
+        dialog->setWindowFlags(dialog->windowFlags()^Qt::WindowContextHelpButtonHint);
+        dialog->setModal(true);
+
+        selectedPort = dialog->getItem(nullptr, "Bitte ein Midi-Gerät auswählen:", "Midi-Geräte:", midiDevices, 0, true);
+        for(i=0; i<portCount; i++)
+            if(selectedPort==midiDevices.at(i)) return i;
+
+
+    }
+    return 100;
+}
+
+