PingComboBox: Add first version compatible with SettingsManager

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

qml/PingComboBox.qml

@@ -0,0 +1,28 @@
+import QtQml 2.2
+import QtQuick.Controls 2.2
+
+ComboBox {
+    id: root
+    currentIndex: -1
+
+    property var setting
+
+    onCurrentTextChanged: {
+        // Empty string should not pass
+        // ComboBox start with it and emit a signal for that
+        if(!currentText){
+            return
+        }
+        setting = currentText
+    }
+
+    Component.onCompleted: {
+        // Load the correct model index
+        for(var i in model) {
+            if(model[i] == setting) {
+                currentIndex = i
+                return
+            }
+        }
+    }
+}

resources.qrc

@@ -11,6 +11,7 @@
         <file alias="MainPage.qml">qml/MainPage.qml</file>
         <file alias="Ping1DVisualizer.qml">qml/Ping1DVisualizer.qml</file>
         <file alias="PingButton.qml">qml/PingButton.qml</file>
+        <file alias="PingComboBox.qml">qml/PingComboBox.qml</file>
         <file alias="PingItem.qml">qml/PingItem.qml</file>
         <file alias="PingImage.qml">qml/PingImage.qml</file>
         <file alias="PingLogger.qml">qml/PingLogger.qml</file>