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, 44 insertions, 0 deletions

diff --git a/tradeshow/iot-sensortag/resources/base/BaseChart.qml b/tradeshow/iot-sensortag/resources/base/BaseChart.qml
index 58549b5..d144916 100644
--- a/tradeshow/iot-sensortag/resources/base/BaseChart.qml
+++ b/tradeshow/iot-sensortag/resources/base/BaseChart.qml
@@ -61,9 +61,17 @@ Item {
     property bool rightSide: false
     property alias titlePaneHeight: titleIcon.height
     property bool hasData: baseChart.sensor ? baseChart.sensor.state === SensorTagData.Connected : false
+    property int sensorState: sensor ? sensor.state : SensorTagData.NotFound
 
     signal clicked
 
+    onSensorStateChanged: {
+        if (sensorState === SensorTagData.Scanning)
+            sensorIcon.startBlinking();
+        else
+            sensorIcon.stopBlinking();
+    }
+
     Image {
         id: titleIcon
 
@@ -89,6 +97,42 @@ Item {
         anchors.bottomMargin: 16
         anchors.left: parent.left
         anchors.right: parent.right
+        visible: sensorState === SensorTagData.Connected
+    }
+
+    Item {
+        anchors.top: titleIcon.bottom
+        anchors.bottom: separator.bottom
+        anchors.bottomMargin: 16
+        anchors.left: parent.left
+        anchors.right: parent.right
+        visible: sensorState === SensorTagData.Scanning ||
+                 sensorState === SensorTagData.Disconnected ||
+                 sensorState === SensorTagData.Error ||
+                 sensorState === SensorTagData.NotFound
+
+        Column {
+            anchors.centerIn: parent
+            spacing: 20
+
+            BlinkingIcon {
+                id: sensorIcon
+
+                source: pathPrefix + "Toolbar/icon_topbar_sensor.png"
+                anchors.horizontalCenter: parent.horizontalCenter
+                visible: sensorState === SensorTagData.Scanning
+            }
+
+            Text {
+                id: stateText
+
+                color: "white"
+                text: sensorState === SensorTagData.Scanning ? "Connecting to sensor..."
+                        : sensorState === SensorTagData.Disconnected ? "Disconnected"
+                        : sensorState === SensorTagData.NotFound ? "Device not found"
+                        : ""
+            }
+        }
     }
 
     Image {