iot-sensortag: Allow reconnect after a failed connection attempt

A disconnected sensor tag can be tried to be reconnected by clicking
on the chart area or starting rescan from the Sensor settings menu.
During a (re)connection process a progress indicator is shown to
the user.

The user has a possibility to disconnect (and reconnect) a
currently connect SensorDataProvider

A new state, 'NotFound' is added in SensorTagDataProvider to
distinguish between states when a Sensor Tag has not been discovered
at all, and when it has already been discovered but is has been
disconnected.

Change-Id: I54eea72d8c92a67a5ccbb3bc192ac8f33ada1c39
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/tradeshow/iot-sensortag/dataproviderpool.h b/tradeshow/iot-sensortag/dataproviderpool.h
index e8d50e6..9c14504 100644
--- a/tradeshow/iot-sensortag/dataproviderpool.h
+++ b/tradeshow/iot-sensortag/dataproviderpool.h
@@ -65,6 +65,7 @@ public:
     Q_INVOKABLE virtual void startScanning();
     Q_INVOKABLE virtual void stopScanning();
     Q_INVOKABLE virtual SensorTagDataProvider* getProvider(SensorTagDataProvider::TagType type) const;
+    Q_INVOKABLE virtual void disconnectProvider(QString id);
 
     QQmlListProperty<SensorTagDataProvider> dataProviders();
 
@@ -75,6 +76,7 @@ signals:
     void providerDisconnected(QString id);
     void providerInError(QString id);
     void providersUpdated();
+    void scanStarted();
     void scanFinished();
     void providerForCloudChanged();
     void dataProvidersChanged();