Pause orientation sensors in Qml Viewer when the application window is not active

Task-number: QTBUG-13347
Reviewed-by: Martin Jones

1 files changed, 26 insertions, 1 deletions

diff --git a/tools/qml/deviceorientation_symbian.cpp b/tools/qml/deviceorientation_symbian.cpp
index 307c417..7710cf9 100644
--- a/tools/qml/deviceorientation_symbian.cpp
+++ b/tools/qml/deviceorientation_symbian.cpp
@@ -52,7 +52,7 @@ class SymbianOrientation : public DeviceOrientation, public MSensrvDataListener
     Q_OBJECT
 public:
     SymbianOrientation()
-        : DeviceOrientation(), m_current(UnknownOrientation), m_sensorChannel(0)
+        : DeviceOrientation(), m_current(UnknownOrientation), m_sensorChannel(0), m_channelOpen(false)
     {
         TRAP_IGNORE(initL());
         if (!m_sensorChannel)
@@ -84,6 +84,7 @@ public:
                 TRAP(error, m_sensorChannel->OpenChannelL());
             if (!error) {
                 TRAP(error, m_sensorChannel->StartDataListeningL(this, 1, 1, 0));
+                m_channelOpen = true;
                 break;
            }
             if (error) {
@@ -107,6 +108,30 @@ public:
 private:
     DeviceOrientation::Orientation m_current;
     CSensrvChannel *m_sensorChannel;
+    bool m_channelOpen;
+    void pauseListening() {
+        if (m_sensorChannel && m_channelOpen) {
+            m_sensorChannel->StopDataListening();
+            m_sensorChannel->CloseChannel();
+            m_channelOpen = false;
+        }
+    }
+
+    void resumeListening() {
+        if (m_sensorChannel && !m_channelOpen) {
+            TRAPD(error, m_sensorChannel->OpenChannelL());
+            if (!error) {
+                TRAP(error, m_sensorChannel->StartDataListeningL(this, 1, 1, 0));
+                if (!error) {
+                    m_channelOpen = true;
+                }
+            }
+            if (error) {
+                delete m_sensorChannel;
+                m_sensorChannel = 0;
+            }
+        }
+    }
 
     void DataReceived(CSensrvChannel &channel, TInt count, TInt dataLost)
     {