iOS: add global function 'isQtApplication'

Several places in the code we need to check if the plugin is
running as a cross-platform Qt application or inside a
native app. So we refactor this function to qiosglobal so
we can access it from everywhere.

Change-Id: I78db0dcde71b7d281868ce304867c8f876caef2a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/plugins/platforms/ios/qiosglobal.mm b/src/plugins/platforms/ios/qiosglobal.mm
index 30138acc1b..a8a89a1637 100644
--- a/src/plugins/platforms/ios/qiosglobal.mm
+++ b/src/plugins/platforms/ios/qiosglobal.mm
@@ -40,10 +40,23 @@
 ****************************************************************************/
 
 #include "qiosglobal.h"
+#include "qiosapplicationdelegate.h"
 #include <QtGui/qscreen.h>
 
 QT_BEGIN_NAMESPACE
 
+bool isQtApplication()
+{
+    // Returns true if the plugin is in full control of the whole application. This means
+    // that we control the application delegate and the top view controller, and can take
+    // actions that impacts all parts of the application. The opposite means that we are
+    // embedded inside a native iOS application, and should be more focused on playing along
+    // with native UIControls, and less inclined to change structures that lies outside the
+    // scope of our QWindows/UIViews.
+    static bool isQt = ([[UIApplication sharedApplication].delegate isKindOfClass:[QIOSApplicationDelegate class]]);
+    return isQt;
+}
+
 CGRect toCGRect(const QRect &rect)
 {
     return CGRectMake(rect.x(), rect.y(), rect.width(), rect.height());