Add volume control

LenaPi/VolumeSlider.qml

@@ -0,0 +1,31 @@
+import QtQuick 2.0
+import QtQuick.Controls 2.4
+import QtQuick.Layouts 1.3
+
+ColumnLayout {
+    property alias from: slider.from
+    property alias to: slider.to
+    property alias stepSize: slider.stepSize
+    property alias value: slider.value
+    spacing: 5
+    RoundImageButton{
+        id: increaseButton
+        imageSource: "qrc:///icon_increase_volume"
+        onClicked: slider.increase();
+    }
+    Slider{
+        id: slider
+        Layout.fillHeight: true
+        Layout.alignment: Qt.AlignHCenter
+        orientation: Qt.Vertical
+        from: 34 // we cannot hear anything if lower than 35%
+        to: 100
+        stepSize: 1
+        value: 50
+    }
+    RoundImageButton{
+        id: decreaseButton
+        imageSource: "qrc:///icon_decrease_volume"
+        onClicked: slider.decrease();
+    }
+}