Avoid a warning from the QNX QPA plugin.

The HDMI display on the Playbook is listed, but (normally) unattached, 
and hence generates an error if we attempt to register for events. This 
patch avoids the warning; a future change will actually watch for screens
being attached / detached and update the QPlatformScreens and event
registration correctly.

Change-Id: I5a9cc773648d50f657fe1b3611fd42495ca7e836
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/plugins/platforms/qnx/qqnxbpseventfilter.cpp b/src/plugins/platforms/qnx/qqnxbpseventfilter.cpp
index 4ce38b9fdc..2e4583119f 100644
--- a/src/plugins/platforms/qnx/qqnxbpseventfilter.cpp
+++ b/src/plugins/platforms/qnx/qqnxbpseventfilter.cpp
@@ -100,6 +100,17 @@ void QQnxBpsEventFilter::registerForScreenEvents(QQnxScreen *screen)
         return;
     }
 
+    int attached;
+    if (screen_get_display_property_iv(screen->nativeDisplay(), SCREEN_PROPERTY_ATTACHED, &attached) != BPS_SUCCESS) {
+        qWarning() << "QQNX: unable to query display attachment";
+        return;
+    }
+
+    if (!attached) {
+        qBpsEventFilterDebug() << "skipping event registration for non-attached screen";
+        return;
+    }
+
     if (screen_request_events(screen->nativeContext()) != BPS_SUCCESS)
         qWarning("QQNX: failed to register for screen events on screen %p", screen->nativeContext());
 }