Fix: Make rotating compatible to Qt 5.2 (#256)R7604

Welcome to Qt5 compatibility hell. Seems like the
Screen.orientationUpdateMask property is only valid from Qt5.4 and
beyond. To make this compatible down to Qt5.2, i introduce a QML
JavaScript workaround/hack.

1 files changed, 7 insertions, 2 deletions

diff --git a/navit/graphics/qt5/loader.qml b/navit/graphics/qt5/loader.qml
index ed9425bf7..9882cb23a 100644
--- a/navit/graphics/qt5/loader.qml
+++ b/navit/graphics/qt5/loader.qml
@@ -5,8 +5,6 @@ import QtQuick.Window 2.0
 Window {
    width: 200; height: 200
     
-   Screen.orientationUpdateMask: Qt.PortraitOrientation + Qt.LandscapeOrientation + Qt.InvertedPortraitOrientation + Qt.InvertedLandscapeOrientation
-
    Item {
        id: root
        anchors.fill: parent
@@ -35,5 +33,12 @@ Window {
            source: "graphics_qt5.qml"
            objectName: "navit_loader"
        }
+       Component.onCompleted: {
+           // orientation update mask is defined since QML 5.4 So make this compatible to 5.2
+	   // by just calling this if available
+           if(Screen.hasOwnProperty('orientationUpdateMask')) {
+               Screen.orientationUpdateMask = Qt.PortraitOrientation + Qt.LandscapeOrientation + Qt.InvertedPortraitOrientation + Qt.InvertedLandscapeOrientation;
+	   }
+       }
    }
 }