add "play test sound" button, while changing volume

src/widget/form/settings/avform.cpp

@@ -44,6 +44,9 @@ AVForm::AVForm() :
     bodyUI = new Ui::AVSettings;
     bodyUI->setupUi(this);
 
+    bodyUI->btnPlayTestSound->setToolTip(
+                tr("Play a test sound while changing the output volume."));
+
 #ifdef QTOX_FILTER_AUDIO
     bodyUI->filterAudio->setChecked(Settings::getInstance().getFilterAudio());
 #else
@@ -361,6 +364,9 @@ void AVForm::onPlaybackSliderMoved(int value)
     if (audio.isOutputReady()) {
         const qreal percentage = value / 100.0;
         audio.setOutputVolume(percentage);
+
+        if (mPlayTestSound)
+            audio.playMono16Sound(QStringLiteral(":/audio/notification.pcm"));
     }
 }
 
@@ -419,3 +425,8 @@ void AVForm::retranslateUi()
 {
     bodyUI->retranslateUi(this);
 }
+
+void AVForm::on_btnPlayTestSound_clicked(bool checked)
+{
+    mPlayTestSound = checked;
+}

src/widget/form/settings/avform.h

@@ -66,6 +66,8 @@ private slots:
     void onVideoDevChanged(int index);
     void onVideoModesIndexChanged(int index);
 
+    void on_btnPlayTestSound_clicked(bool checked);
+
 protected:
     void updateVideoModes(int curIndex);
 
@@ -78,6 +80,7 @@ private:
 private:
     Ui::AVSettings *bodyUI;
     bool subscribedToAudioIn;
+    bool mPlayTestSound;
     VideoSurface *camVideoSurface;
     CameraSource &camera;
     QVector<QPair<QString, QString>> videoDeviceList;

src/widget/form/settings/avsettings.ui

@@ -41,20 +41,24 @@
           <string>Audio Settings</string>
          </property>
          <layout class="QGridLayout" name="gridLayout_3">
-          <item row="6" column="0">
+          <item row="0" column="0">
-           <widget class="QCheckBox" name="filterAudio">
+           <widget class="QLabel" name="outDevLabel">
-            <property name="toolTip">
-             <string>Filter sound from your microphone, so that people hearing you would get better sound.</string>
-            </property>
             <property name="text">
-             <string>Filter audio</string>
+             <string>Playback device</string>
+            </property>
+           </widget>
+          </item>
+          <item row="0" column="1" colspan="2">
+           <widget class="QComboBox" name="outDevCombobox"/>
+          </item>
+          <item row="1" column="0">
+           <widget class="QLabel" name="playbackLabel">
+            <property name="text">
+             <string>Volume</string>
             </property>
            </widget>
           </item>
           <item row="1" column="1">
-           <widget class="QComboBox" name="outDevCombobox"/>
-          </item>
-          <item row="2" column="1">
            <widget class="QSlider" name="playbackSlider">
             <property name="toolTip">
              <string>Use slider to set volume of your speakers.</string>
@@ -67,24 +71,38 @@
             </property>
            </widget>
           </item>
-          <item row="5" column="0">
+          <item row="1" column="2">
-           <widget class="QLabel" name="microphoneLabel">
+           <widget class="QToolButton" name="btnPlayTestSound">
             <property name="text">
-             <string>Gain</string>
+             <string>...</string>
+            </property>
+            <property name="icon">
+             <iconset resource="../../../../res.qrc">
+              <normaloff>:/ui/volButton/volButton.png</normaloff>:/ui/volButton/volButton.png</iconset>
+            </property>
+            <property name="checkable">
+             <bool>true</bool>
             </property>
            </widget>
           </item>
-          <item row="3" column="0">
+          <item row="2" column="0">
            <widget class="QLabel" name="inDevLabel">
             <property name="text">
              <string>Capture device</string>
             </property>
            </widget>
           </item>
-          <item row="3" column="1">
+          <item row="2" column="1" colspan="2">
            <widget class="QComboBox" name="inDevCombobox"/>
           </item>
-          <item row="5" column="2">
+          <item row="3" column="0">
+           <widget class="QLabel" name="microphoneLabel">
+            <property name="text">
+             <string>Gain</string>
+            </property>
+           </widget>
+          </item>
+          <item row="3" column="1" colspan="2">
            <widget class="QSlider" name="microphoneSlider">
             <property name="toolTip">
              <string>Use slider to set volume of your microphone.</string>
@@ -97,17 +115,13 @@
             </property>
            </widget>
           </item>
-          <item row="2" column="0">
+          <item row="5" column="0">
-           <widget class="QLabel" name="playbackLabel">
+           <widget class="QCheckBox" name="filterAudio">
-            <property name="text">
+            <property name="toolTip">
-             <string>Volume</string>
+             <string>Filter sound from your microphone, so that people hearing you would get better sound.</string>
             </property>
-           </widget>
-          </item>
-          <item row="1" column="0">
-           <widget class="QLabel" name="outDevLabel">
             <property name="text">
-             <string>Playback device</string>
+             <string>Filter audio</string>
             </property>
            </widget>
           </item>
@@ -206,6 +220,8 @@ which may lead to problems with video calls.</string>
    <container>1</container>
   </customwidget>
  </customwidgets>
- <resources/>
+ <resources>
+  <include location="../../../../res.qrc"/>
+ </resources>
  <connections/>
 </ui>