Make the CoreFoundation event dispatcher depend on QtCore only

In anticipation of moving it to QtCore.

The call to QWindowSystemInterface::sendWindowSystemEvents() has been
moved to QIOSEventDispatcher by making processPostedEvents() virtual.

Change-Id: I9e03be4153a9f5f34e9a0ac942cdff572a44c318
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/src/plugins/platforms/ios/qioseventdispatcher.h b/src/plugins/platforms/ios/qioseventdispatcher.h
index fdaa7e68fe..e8ea1cc28b 100644
--- a/src/plugins/platforms/ios/qioseventdispatcher.h
+++ b/src/plugins/platforms/ios/qioseventdispatcher.h
@@ -46,6 +46,7 @@ public:
     explicit QIOSEventDispatcher(QObject *parent = 0);
 
     bool processEvents(QEventLoop::ProcessEventsFlags flags) Q_DECL_OVERRIDE;
+    bool processPostedEvents() Q_DECL_OVERRIDE;
 
     void handleRunLoopExit(CFRunLoopActivity activity);
 
diff --git a/src/plugins/platforms/ios/qioseventdispatcher.mm b/src/plugins/platforms/ios/qioseventdispatcher.mm
index bd4b8778ed..0e9f176487 100644
--- a/src/plugins/platforms/ios/qioseventdispatcher.mm
+++ b/src/plugins/platforms/ios/qioseventdispatcher.mm
@@ -39,6 +39,8 @@
 #include <QtCore/private/qcoreapplication_p.h>
 #include <QtCore/private/qthread_p.h>
 
+#include <qpa/qwindowsysteminterface.h>
+
 #import <Foundation/NSArray.h>
 #import <Foundation/NSString.h>
 #import <Foundation/NSProcessInfo.h>
@@ -461,6 +463,25 @@ bool __attribute__((returns_twice)) QIOSEventDispatcher::processEvents(QEventLoo
     return processedEvents;
 }
 
+/*!
+    Override of the CoreFoundation posted events runloop source callback
+    so that we can send window system (QPA) events in addition to sending
+    normal Qt events.
+*/
+bool QIOSEventDispatcher::processPostedEvents()
+{
+    // Don't send window system events if the base CF dispatcher has determined
+    // that events should not be sent for this pass of the runloop source.
+    if (!QEventDispatcherCoreFoundation::processPostedEvents())
+        return false;
+
+    qEventDispatcherDebug() << "Sending window system events for " << m_processEvents.flags; qIndent();
+    QWindowSystemInterface::sendWindowSystemEvents(m_processEvents.flags);
+    qUnIndent();
+
+    return true;
+}
+
 void QIOSEventDispatcher::handleRunLoopExit(CFRunLoopActivity activity)
 {
     Q_UNUSED(activity);