Audio preferences dialog: animate input volume control text

sdrbase/gui/audiodialog.cpp

@@ -69,3 +69,9 @@ void AudioDialog::accept()
 {
 	QDialog::accept();
 }
+
+void AudioDialog::on_inputVolume_valueChanged(int value)
+{
+    float inputVolume = (float) value / 100.0f;
+    ui->inputVolumeText->setText(QString("%1").arg(inputVolume, 0, 'f', 2));
+}

sdrbase/gui/audiodialog.h

@@ -29,6 +29,7 @@ private:
 
 private slots:
 	void accept();
+	void on_inputVolume_valueChanged(int value);
 };
 
 #endif // INCLUDE_AUDIODIALOG_H

sdrbase/gui/audiodialog.ui

@@ -23,7 +23,7 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>0</number>
+      <number>1</number>
      </property>
      <widget class="QWidget" name="tab_2">
       <attribute name="title">
@@ -84,6 +84,9 @@
            <property name="pageStep">
             <number>1</number>
            </property>
+           <property name="value">
+            <number>50</number>
+           </property>
           </widget>
          </item>
          <item>
@@ -95,7 +98,7 @@
             </size>
            </property>
            <property name="text">
-            <string>1.00</string>
+            <string>0.50</string>
            </property>
            <property name="alignment">
             <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>