Various improvements to lowenergyscanner example

1.) Improves UI flow
2.) Improves error behavior (e.g. device disconnects)
3.) Adds missing signal/model updates whcih caused unexpected UI flow

Change-Id: Icc7edf4945df0e964b5c91b407ce5976a1585b81
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>

2 files changed, 33 insertions, 16 deletions

diff --git a/examples/bluetooth/lowenergyscanner/assets/Characteristics.qml b/examples/bluetooth/lowenergyscanner/assets/Characteristics.qml
index ef1538ab..4a7db471 100644
--- a/examples/bluetooth/lowenergyscanner/assets/Characteristics.qml
+++ b/examples/bluetooth/lowenergyscanner/assets/Characteristics.qml
@@ -54,12 +54,23 @@ Rectangle {
     Dialog {
         id: info
         anchors.centerIn: parent
-        visible: false
+        visible: true
+        dialogText: "Scanning for characteristics...";
     }
 
-    Component.onCompleted: {
-        info.visible = true;
-        info.dialogText = "Scanning for characteristics...";
+    Connections {
+        target: device
+        onCharacteristicsUpdated: {
+            menu.menuText = "Back"
+            if (characteristicview.count === 0)
+                info.dialogText = "No characteristic found"
+            else
+                info.visible = false;
+        }
+
+        onDisconnected: {
+            pageLoader.source = "main.qml"
+        }
     }
 
     ListView {
@@ -80,11 +91,6 @@ Rectangle {
             border.color: "black"
             radius: 5
 
-            Component.onCompleted: {
-                menu.menuText = "Back"
-                info.visible = false
-            }
-
             Label {
                 id: characteristicName
                 textContent: modelData.characteristicName
@@ -132,7 +138,7 @@ Rectangle {
         id: menu
         anchors.bottom: parent.bottom
         menuWidth: parent.width
-        menuText: device.update
+        menuText: "Scanning"
         menuHeight: (parent.height/6)
         onButtonClick: {
             pageLoader.source = "Services.qml"
diff --git a/examples/bluetooth/lowenergyscanner/assets/Services.qml b/examples/bluetooth/lowenergyscanner/assets/Services.qml
index de3eb187..361f14c1 100644
--- a/examples/bluetooth/lowenergyscanner/assets/Services.qml
+++ b/examples/bluetooth/lowenergyscanner/assets/Services.qml
@@ -54,12 +54,22 @@ Rectangle {
     Dialog {
         id: info
         anchors.centerIn: parent
-        visible: false
+        visible: true
+        dialogText: "Scanning for services...";
     }
 
-    Component.onCompleted: {
-        info.visible = true;
-        info.dialogText = "Scanning for services...";
+    Connections {
+        target: device
+        onServicesUpdated: {
+            if (servicesview.count === 0)
+                info.dialogText = "No services found"
+            else
+                info.visible = false;
+        }
+
+        onDisconnected: {
+            pageLoader.source = "main.qml"
+        }
     }
 
     ListView {
@@ -78,7 +88,9 @@ Rectangle {
             border.color: "black"
             radius: 5
             width: parent.width
-            Component.onCompleted: info.visible = false
+            Component.onCompleted: {
+                info.visible = false
+            }
 
             MouseArea {
                 anchors.fill: parent
@@ -113,7 +125,6 @@ Rectangle {
         menuHeight: (parent.height/6)
         onButtonClick: {
             device.disconnectFromDevice()
-            pageLoader.source = "main.qml"
         }
     }
 }