added cyclic update

mainwindow.cpp

@@ -20,13 +20,14 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWi
     ui->txt_address->setText(DEFAULT_ADDRESS);
     mAddress = ui->txt_address->text();
 
-    connect(&mTimer, &QTimer::timeout, this, &MainWindow::sendVolume);
-    mTimer.setSingleShot(true);
+    // setup volume value collection
+    connect(&mTimerValCollect, &QTimer::timeout, this, &MainWindow::sendVolume);
+    mTimerValCollect.setSingleShot(true);
 
-    // load initial data
-    sendCommand("<YAMAHA_AV cmd=\"GET\"><System><Power_Control><Power>GetParam</Power></Power_Control></System></YAMAHA_AV>");
-    sendCommand("<YAMAHA_AV cmd=\"GET\"><Main_Zone><Volume><Lvl>GetParam</Lvl></Volume></Main_Zone></YAMAHA_AV>");
-    sendCommand("<YAMAHA_AV cmd=\"GET\"><Main_Zone><Input><Input_Sel>GetParam</Input_Sel></Input></Main_Zone></YAMAHA_AV>");
+    // load initial data and set update rate
+    updateAVState();
+    connect(&mTimerUpdate, &QTimer::timeout, this, &MainWindow::updateAVState);
+    mTimerUpdate.start(UPDATETIME);
 
     QFile css(":style.css");
     if (css.open(QFile::ReadOnly | QFile::Text))
@@ -130,10 +131,8 @@ void MainWindow::setPowerState()
         ui->dial->setStyleSheet("");
         setActiveButton("");
     }
-    qDebug() << ui->btn_onoff->isEnabled(); // rogo: delete
 }
 
-
 void MainWindow::on_txt_address_textEdited(const QString &arg1)
 {
     mAddress = arg1;
@@ -164,7 +163,7 @@ void MainWindow::on_dial_valueChanged(int value)
 
     ui->lbl_volume->setText(QString::number(value));
     mVolume = value;
-    mTimer.start(WAITTIME);
+    mTimerValCollect.start(COLLECTTIME);
 }
 
 void MainWindow::sendVolume()
@@ -174,6 +173,13 @@ void MainWindow::sendVolume()
                 + "</Val><Exp>1</Exp><Unit>dB</Unit></Lvl></Volume></Main_Zone></YAMAHA_AV>");
 }
 
+void MainWindow::updateAVState()
+{
+    sendCommand("<YAMAHA_AV cmd=\"GET\"><System><Power_Control><Power>GetParam</Power></Power_Control></System></YAMAHA_AV>");
+    sendCommand("<YAMAHA_AV cmd=\"GET\"><Main_Zone><Volume><Lvl>GetParam</Lvl></Volume></Main_Zone></YAMAHA_AV>");
+    sendCommand("<YAMAHA_AV cmd=\"GET\"><Main_Zone><Input><Input_Sel>GetParam</Input_Sel></Input></Main_Zone></YAMAHA_AV>");
+}
+
 void MainWindow::on_btn_hdmi1_clicked()
 {
     sendCommand("<YAMAHA_AV cmd=\"PUT\"><Main_Zone><Input><Input_Sel>HDMI1</Input_Sel></Input></Main_Zone></YAMAHA_AV>");

mainwindow.h

@@ -16,11 +16,13 @@ class MainWindow : public QMainWindow
     Q_OBJECT
 
 public:
-    explicit MainWindow(QWidget *parent = 0);
+    explicit MainWindow(QWidget *parent = nullptr);
     ~MainWindow();
 
     void setPowerState();
     
+    void updateAVState();
+
 private slots:
     void on_btn_onoff_clicked();
     void replyFinished(QNetworkReply *reply);
@@ -38,11 +40,14 @@ private:
     Ui::MainWindow *ui;
 
     QString mAddress;
-    QTimer mTimer;
+    QTimer mTimerValCollect;
+    QTimer mTimerUpdate;
+
     bool mPowered = false;
     int mVolume = 0;
     QString mInput;
-    const int WAITTIME = 400;
+    const int COLLECTTIME = 400;
+    const int UPDATETIME = 20000;
 
     void sendCommand(QString cmd);
     void updateUi();

style.css

@@ -8,11 +8,6 @@ QPushButton {
     color: #edf2f4;
 }
 
-/*QPushbutton:disabled {
-    background-color: #24e895;
-    color: #404040;
-}*/
-
 QPushButton:hover {
     border: 1px solid #0077fd;
 }