4 files changed, 18 insertions, 12 deletions

diff --git a/vcl/unx/kde4/KDESalDisplay.cxx b/vcl/unx/kde4/KDESalDisplay.cxx
index 105393fd9b54..33a36e45d5b0 100644
--- a/vcl/unx/kde4/KDESalDisplay.cxx
+++ b/vcl/unx/kde4/KDESalDisplay.cxx
@@ -46,14 +46,14 @@ SalKDEDisplay::~SalKDEDisplay()
     pDisp_ = nullptr;
 }
 
-void SalKDEDisplay::Yield()
+bool SalKDEDisplay::Yield()
 {
     if( DispatchInternalEvent() )
-        return;
+        return true;
 
     // Prevent blocking from Drag'n'Drop events, which may have already have processed the event
     if (XEventsQueued( pDisp_, QueuedAfterReading ) == 0)
-        return;
+        return false;
 
     DBG_ASSERT( static_cast<SalYieldMutex*>(GetSalData()->m_pInstance->GetYieldMutex())->GetThreadId() ==
                 osl::Thread::getCurrentIdentifier(),
@@ -62,8 +62,9 @@ void SalKDEDisplay::Yield()
     XEvent event;
     XNextEvent( pDisp_, &event );
     if( checkDirectInputEvent( &event ))
-        return;
+        return true;
     qApp->x11ProcessEvent( &event );
+    return true;
 }
 
 // HACK: When using Qt event loop, input methods (japanese, etc.) will get broken because
diff --git a/vcl/unx/kde4/KDESalDisplay.hxx b/vcl/unx/kde4/KDESalDisplay.hxx
index a262a6a57ef1..59734c7d806e 100644
--- a/vcl/unx/kde4/KDESalDisplay.hxx
+++ b/vcl/unx/kde4/KDESalDisplay.hxx
@@ -27,7 +27,7 @@ class SalKDEDisplay : public SalX11Display
         explicit SalKDEDisplay( Display* pDisp );
         virtual ~SalKDEDisplay();
         static SalKDEDisplay* self();
-        virtual void Yield() override;
+        virtual bool Yield() override;
         bool checkDirectInputEvent( XEvent* ev );
     private:
         Atom xim_protocol;
diff --git a/vcl/unx/kde4/KDEXLib.cxx b/vcl/unx/kde4/KDEXLib.cxx
index 6c3023b9ab77..653ce40c9abe 100644
--- a/vcl/unx/kde4/KDEXLib.cxx
+++ b/vcl/unx/kde4/KDEXLib.cxx
@@ -278,22 +278,25 @@ void KDEXLib::socketNotifierActivated( int fd )
     sdata.handle( fd, sdata.data );
 }
 
-void KDEXLib::Yield( bool bWait, bool bHandleAllCurrentEvents )
+bool KDEXLib::Yield( bool bWait, bool bHandleAllCurrentEvents )
 {
     if( !m_isGlibEventLoopType )
     {
+        bool wasEvent = false;
         if( qApp->thread() == QThread::currentThread())
         {
             // even if we use the LO event loop, still process Qt's events,
             // otherwise they can remain unhandled for quite a long while
-            processYield( false, bHandleAllCurrentEvents );
+            wasEvent = processYield( false, bHandleAllCurrentEvents );
         }
-        return SalXLib::Yield( bWait, bHandleAllCurrentEvents );
+        return SalXLib::Yield(bWait, bHandleAllCurrentEvents) || wasEvent;
     }
     // if we are the main thread (which is where the event processing is done),
     // good, just do it
     if( qApp->thread() == QThread::currentThread())
-        processYield( bWait, bHandleAllCurrentEvents );
+    {
+        return processYield( bWait, bHandleAllCurrentEvents );
+    }
     else
     {
         // we were called from another thread;
@@ -302,10 +305,11 @@ void KDEXLib::Yield( bool bWait, bool bHandleAllCurrentEvents )
         // temporarily do it while checking for new events)
         SalYieldMutexReleaser aReleaser;
         Q_EMIT processYieldSignal( bWait, bHandleAllCurrentEvents );
+        return false;
     }
 }
 
-void KDEXLib::processYield( bool bWait, bool bHandleAllCurrentEvents )
+bool KDEXLib::processYield( bool bWait, bool bHandleAllCurrentEvents )
 {
     blockIdleTimeout = !bWait;
     QAbstractEventDispatcher* dispatcher = QAbstractEventDispatcher::instance( qApp->thread());
@@ -321,6 +325,7 @@ void KDEXLib::processYield( bool bWait, bool bHandleAllCurrentEvents )
     if( bWait && !wasEvent )
         dispatcher->processEvents( QEventLoop::WaitForMoreEvents );
     blockIdleTimeout = false;
+    return wasEvent;
 }
 
 void KDEXLib::StartTimer( sal_uLong nMS )
diff --git a/vcl/unx/kde4/KDEXLib.hxx b/vcl/unx/kde4/KDEXLib.hxx
index 951acb9a917f..4593298c34c6 100644
--- a/vcl/unx/kde4/KDEXLib.hxx
+++ b/vcl/unx/kde4/KDEXLib.hxx
@@ -67,7 +67,7 @@ class KDEXLib : public QObject, public SalXLib
         void userEventActivated();
         void startTimeoutTimer();
         void startUserEventTimer();
-        void processYield( bool bWait, bool bHandleAllCurrentEvents );
+        bool processYield( bool bWait, bool bHandleAllCurrentEvents );
     Q_SIGNALS:
         void startTimeoutTimerSignal();
         void startUserEventTimerSignal();
@@ -82,7 +82,7 @@ class KDEXLib : public QObject, public SalXLib
         virtual ~KDEXLib();
 
         virtual void Init() override;
-        virtual void Yield( bool bWait, bool bHandleAllCurrentEvents ) override;
+        virtual bool Yield( bool bWait, bool bHandleAllCurrentEvents ) override;
         virtual void Insert( int fd, void* data, YieldFunc pending, YieldFunc queued, YieldFunc handle ) override;
         virtual void Remove( int fd ) override;
         virtual void StartTimer( sal_uLong nMS ) override;