7 files changed, 35 insertions, 8 deletions
diff --git a/src/corelib/statemachine/qabstracttransition.cpp b/src/corelib/statemachine/qabstracttransition.cpp
index 3be3b73..670aa7d 100644
--- a/src/corelib/statemachine/qabstracttransition.cpp
+++ b/src/corelib/statemachine/qabstracttransition.cpp
@@ -67,6 +67,8 @@ QT_BEGIN_NAMESPACE
   targetStates() function returns the targets of the transition. The machine()
   function returns the state machine that the transition is part of.
 
+  The triggered() signal is emitted when the transition has been triggered.
+
   Transitions can cause animations to be played. Use the addAnimation()
   function to add an animation to the transition.
 
@@ -139,6 +141,12 @@ QState *QAbstractTransitionPrivate::sourceState() const
     return qobject_cast<QState*>(parent);
 }
 
+void QAbstractTransitionPrivate::emitTriggered()
+{
+    Q_Q(QAbstractTransition);
+    emit q->triggered();
+}
+
 /*!
   Constructs a new QAbstractTransition object with the given \a sourceState.
 */
@@ -333,6 +341,13 @@ QList<QAbstractAnimation*> QAbstractTransition::animations() const
 */
 
 /*!
+  \fn QAbstractTransition::triggered()
+
+  This signal is emitted when the transition has been triggered (after
+  onTransition() has been called).
+*/
+
+/*!
   \reimp
 */
 bool QAbstractTransition::event(QEvent *e)
diff --git a/src/corelib/statemachine/qabstracttransition.h b/src/corelib/statemachine/qabstracttransition.h
index 83899ce..9ba1f11 100644
--- a/src/corelib/statemachine/qabstracttransition.h
+++ b/src/corelib/statemachine/qabstracttransition.h
@@ -89,6 +89,12 @@ public:
     QList<QAbstractAnimation*> animations() const;
 #endif
 
+Q_SIGNALS:
+#if !defined(Q_MOC_RUN) && !defined(qdoc)
+private: // can only be emitted by QAbstractTransition
+#endif
+    void triggered();
+
 protected:
     virtual bool eventTest(QEvent *event) = 0;
 
diff --git a/src/corelib/statemachine/qabstracttransition_p.h b/src/corelib/statemachine/qabstracttransition_p.h
index f0b9bb3..784832d 100644
--- a/src/corelib/statemachine/qabstracttransition_p.h
+++ b/src/corelib/statemachine/qabstracttransition_p.h
@@ -78,6 +78,7 @@ public:
     void callOnTransition(QEvent *e);
     QState *sourceState() const;
     QStateMachine *machine() const;
+    void emitTriggered();
 
     QList<QPointer<QAbstractState> > targetStates;
 
diff --git a/src/corelib/statemachine/qstatemachine.cpp b/src/corelib/statemachine/qstatemachine.cpp
index 7a34e4b..04cce50 100644
--- a/src/corelib/statemachine/qstatemachine.cpp
+++ b/src/corelib/statemachine/qstatemachine.cpp
@@ -498,6 +498,7 @@ void QStateMachinePrivate::executeTransitionContent(QEvent *event, const QList<Q
         qDebug() << q_func() << ": triggering" << t;
 #endif
         QAbstractTransitionPrivate::get(t)->callOnTransition(event);
+        QAbstractTransitionPrivate::get(t)->emitTriggered();
     }
 }
 
diff --git a/src/opengl/qglframebufferobject.cpp b/src/opengl/qglframebufferobject.cpp
index 7f229e2..eacf5bb 100644
--- a/src/opengl/qglframebufferobject.cpp
+++ b/src/opengl/qglframebufferobject.cpp
@@ -935,8 +935,7 @@ QPaintEngine *QGLFramebufferObject::paintEngine() const
 */
 bool QGLFramebufferObject::hasOpenGLFramebufferObjects()
 {
-    if (!QGLContext::currentContext())
-        QGLWidget dmy; // needed to detect and init the QGLExtensions object
+    QGLExtensions::init();
     return (QGLExtensions::glExtensions & QGLExtensions::FramebufferObject);
 }
 
@@ -1098,8 +1097,7 @@ bool QGLFramebufferObject::isBound() const
 */
 bool QGLFramebufferObject::hasOpenGLFramebufferBlit()
 {
-    if (!QGLContext::currentContext())
-        QGLWidget dmy; // needed to detect and init the QGLExtensions object
+    QGLExtensions::init();
     return (QGLExtensions::glExtensions & QGLExtensions::FramebufferBlit);
 }
 
diff --git a/src/opengl/qpixmapdata_gl.cpp b/src/opengl/qpixmapdata_gl.cpp
index 5e73ef5..f745aae 100644
--- a/src/opengl/qpixmapdata_gl.cpp
+++ b/src/opengl/qpixmapdata_gl.cpp
@@ -114,8 +114,11 @@ QGLPixmapData::~QGLPixmapData()
     QGLWidget *shareWidget = qt_gl_share_widget();
     if (!shareWidget)
         return;
-    QGLShareContextScope ctx(shareWidget->context());
-    glDeleteTextures(1, &m_textureId);
+
+    if (m_textureId) {
+        QGLShareContextScope ctx(shareWidget->context());
+        glDeleteTextures(1, &m_textureId);
+    }
 }
 
 bool QGLPixmapData::isValid() const
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index 50d0ae7..3a7a07e 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -184,11 +184,13 @@ QGLGraphicsSystem::QGLGraphicsSystem()
 class QGLGlobalShareWidget
 {
 public:
-    QGLGlobalShareWidget() : widget(0) {}
+    QGLGlobalShareWidget() : widget(0), initializing(false) {}
 
     QGLWidget *shareWidget() {
-        if (!widget && !cleanedUp) {
+        if (!initializing && !widget && !cleanedUp) {
+            initializing = true;
             widget = new QGLWidget;
+            initializing = false;
         }
         return widget;
     }
@@ -204,6 +206,7 @@ public:
 
 private:
     QGLWidget *widget;
+    bool initializing;
 };
 
 bool QGLGlobalShareWidget::cleanedUp = false;