Update Bluetooth examples for high-DPI displays and nullptr

This change sets the Qt::AA_EnableHighDpiScaling application attribute.
It also uses nullptr to initialize pointers and adds a trivial
optimization to the low energy scanner example.

Change-Id: Ia923573ad78108a2a6a72be4c0948ea97a7ec094
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>
 

1 files changed, 6 insertions, 6 deletions

diff --git a/examples/bluetooth/lowenergyscanner/device.cpp b/examples/bluetooth/lowenergyscanner/device.cpp
index 82179db1..d860457e 100644
--- a/examples/bluetooth/lowenergyscanner/device.cpp
+++ b/examples/bluetooth/lowenergyscanner/device.cpp
@@ -152,12 +152,12 @@ void Device::scanServices(const QString &address)
     // We need the current device for service discovery.
 
     for (auto d: qAsConst(devices)) {
-        auto device = qobject_cast<DeviceInfo *>(d);
-        if (!device)
-            continue;
-
-        if (device->getAddress() == address )
-            currentDevice.setDevice(device->getDevice());
+        if (auto device = qobject_cast<DeviceInfo *>(d)) {
+            if (device->getAddress() == address ) {
+                currentDevice.setDevice(device->getDevice());
+                break;
+            }
+        }
     }
 
     if (!currentDevice.getDevice().isValid()) {