Core plugin can set app wide brand image

src/api/QGCCorePlugin.h

@@ -40,6 +40,9 @@ public:
     Q_PROPERTY(bool         showTouchAreas      MEMBER _showTouchAreas  NOTIFY showTouchAreasChanged)
     Q_PROPERTY(bool         showAdvancedUI      MEMBER _showAdvancedUI  NOTIFY showAdvancedUIChanged)
 
+    Q_PROPERTY(QString      brandImageIndoor    READ brandImageIndoor   CONSTANT)
+    Q_PROPERTY(QString      brandImageOutdoor   READ brandImageIndoor   CONSTANT)
+
     /// The list of settings under the Settings Menu
     /// @return A list of QGCSettings
     virtual QVariantList&           settingsPages       ();
@@ -62,6 +65,12 @@ public:
     /// @return true: Setting should be visible in ui, false: Setting should not be shown in ui
     virtual bool adjustSettingMetaData                  (FactMetaData& metaData);
 
+    /// Return the resource file which contains the brand image for for Indoor theme.
+    virtual QString brandImageIndoor(void) const { return QString(); }
+
+    /// Return the resource file which contains the brand image for for Outdoor theme.
+    virtual QString brandImageOutdoor(void) const { return QString(); }
+
     // Override from QGCTool
     void                            setToolbox          (QGCToolbox *toolbox);
 

src/ui/toolbar/MainToolBar.qml

@@ -230,17 +230,6 @@ Rectangle {
             anchors.top:        parent.top
             anchors.bottom:     parent.bottom
             Layout.fillWidth:   true
-            visible:            _activeVehicle
-        }
-
-        QGCLabel {
-            id:                     waitForVehicle
-            anchors.verticalCenter: parent.verticalCenter
-            text:                   qsTr("Waiting For Vehicle Connection")
-            font.pointSize:         ScreenTools.mediumFontPointSize
-            font.family:            ScreenTools.demiboldFontFamily
-            color:                  colorRed
-            visible:                !_activeVehicle
         }
     }
 

src/ui/toolbar/MainToolBarIndicators.qml

@@ -19,19 +19,31 @@ import QGroundControl.ScreenTools           1.0
 import QGroundControl.Palette               1.0
 
 Item {
-    property var  activeVehicle:        QGroundControl.multiVehicleManager.activeVehicle
-    property bool communicationLost:    activeVehicle ? activeVehicle.connectionLost : false
+    property var  _activeVehicle:        QGroundControl.multiVehicleManager.activeVehicle
+    property bool _communicationLost:    _activeVehicle ? _activeVehicle.connectionLost : false
 
     QGCPalette { id: qgcPal }
 
+
+    QGCLabel {
+        id:                     waitForVehicle
+        anchors.verticalCenter: parent.verticalCenter
+        text:                   qsTr("Waiting For Vehicle Connection")
+        font.pointSize:         ScreenTools.mediumFontPointSize
+        font.family:            ScreenTools.demiboldFontFamily
+        color:                  colorRed
+        visible:                !_activeVehicle
+    }
+
     Row {
         id:             indicatorRow
         anchors.top:    parent.top
         anchors.bottom: parent.bottom
         spacing:        ScreenTools.defaultFontPixelWidth * 1.5
-        visible:        !communicationLost
+        visible:        _activeVehicle && !_communicationLost
+
         Repeater {
-            model:      activeVehicle ? activeVehicle.toolBarIndicators : []
+            model:      _activeVehicle ? _activeVehicle.toolBarIndicators : []
             Loader {
                 anchors.top:    parent.top
                 anchors.bottom: parent.bottom
@@ -44,23 +56,28 @@ Item {
         anchors.right:          parent.right
         anchors.top:            parent.top
         anchors.bottom:         parent.bottom
-        visible:                x > indicatorRow.width && !communicationLost
+        visible:                x > indicatorRow.width && !_communicationLost
         fillMode:               Image.PreserveAspectFit
-        source:                 activeVehicle ? activeVehicle.brandImage : ""
+        source:                 _outdoorPalette ? _brandImageOutdoor : _brandImageIndoor
+
+        property bool   _outdoorPalette:        qgcPal.globalTheme === QGCPalette.Light
+        property bool   _corePluginBranding:    QGroundControl.corePlugin.brandImageIndoor.length != 0
+        property string _brandImageIndoor:      _corePluginBranding ? QGroundControl.corePlugin.brandImageIndoor : (_activeVehicle ? _activeVehicle.brandImageIndoor : "")
+        property string _brandImageOutdoor:     _corePluginBranding ? QGroundControl.corePlugin.brandImageOutdoor : (_activeVehicle ? _activeVehicle.brandImageOutdoor : "")
     }
 
     Row {
         anchors.fill:       parent
         layoutDirection:    Qt.RightToLeft
         spacing:            ScreenTools.defaultFontPixelWidth
-        visible:            communicationLost
+        visible:            _communicationLost
 
         QGCButton {
             id:                     disconnectButton
             anchors.verticalCenter: parent.verticalCenter
             text:                   qsTr("Disconnect")
             primary:                true
-            onClicked:              activeVehicle.disconnectInactiveVehicle()
+            onClicked:              _activeVehicle.disconnectInactiveVehicle()
         }
 
         QGCLabel {