iOS: call UIApplicationMain from event dispatcher, and add application delegate

This change will let you call QApplication::exec() instead of UiApplicationMain
from main. Also added an application delegate that we will need sooner
or later for catching application activation events.

Change-Id: I4edba5ce2059a804782d67c160755fc0e2e5267d
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>

1 files changed, 22 insertions, 36 deletions

diff --git a/src/plugins/platforms/ios/qioseventdispatcher.mm b/src/plugins/platforms/ios/qioseventdispatcher.mm
index 191e80668d..64f853233d 100644
--- a/src/plugins/platforms/ios/qioseventdispatcher.mm
+++ b/src/plugins/platforms/ios/qioseventdispatcher.mm
@@ -39,44 +39,13 @@
 **
 ****************************************************************************/
 
-/****************************************************************************
-**
-** Copyright (c) 2007-2008, Apple, Inc.
-**
-** All rights reserved.
-**
-** Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are met:
-**
-**   * Redistributions of source code must retain the above copyright notice,
-**     this list of conditions and the following disclaimer.
-**
-**   * Redistributions in binary form must reproduce the above copyright notice,
-**     this list of conditions and the following disclaimer in the documentation
-**     and/or other materials provided with the distribution.
-**
-**   * Neither the name of Apple, Inc. nor the names of its contributors
-**     may be used to endorse or promote products derived from this software
-**     without specific prior written permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
-** CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-** EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-** PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-** PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-** LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-** NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-**
-****************************************************************************/
-
 #include "qioseventdispatcher.h"
+#import "qiosapplicationdelegate.h"
 #include <qdebug.h>
 #include <qpa/qwindowsysteminterface.h>
 #include <QtCore/QThread>
+#include <QtCore/private/qcoreapplication_p.h>
+#include <UIKit/UIApplication.h>
 
 QT_BEGIN_NAMESPACE
 QT_USE_NAMESPACE
@@ -218,8 +187,25 @@ QIOSEventDispatcher::~QIOSEventDispatcher()
 
 bool QIOSEventDispatcher::processEvents(QEventLoop::ProcessEventsFlags flags)
 {
-    Q_UNUSED(flags);
-    qDebug() << __FUNCTION__ << "not implemented";
+    UIApplication *uiApplication = [UIApplication sharedApplication];
+    bool excludeUserEvents = flags & QEventLoop::ExcludeUserInputEvents;
+    bool execFlagSet = (flags & QEventLoop::DialogExec) || (flags & QEventLoop::EventLoopExec);
+    bool useExecMode = execFlagSet && !excludeUserEvents;
+
+    if (useExecMode) {
+        if (!uiApplication) {
+            // No UIApplication has been started yet. We therefore start it now. Note that application
+            // developers are free to call UIApplicationMain themselves instead of QApplication::exec()
+            @autoreleasepool {
+                QCoreApplicationPrivate *qAppPriv = static_cast<QCoreApplicationPrivate *>(QObjectPrivate::get(qApp));
+                return UIApplicationMain(qAppPriv->argc, qAppPriv->argv, nil, NSStringFromClass([QIOSApplicationDelegate class]));
+            }
+        } else {
+            // todo: start NSRunLoop...
+        }
+    } else {
+        // todo: manual processEvents...
+    }
     return false;
 }