Merge remote-tracking branch 'origin/5.5' into 5.6

Conflicts:
	config.tests/common/atomic64/atomic64.cpp
	configure
	src/3rdparty/forkfd/forkfd.c
	src/corelib/io/forkfd_qt.cpp
	src/widgets/kernel/qwidgetwindow.cpp
	tests/auto/corelib/statemachine/qstatemachine/tst_qstatemachine.cpp
	tests/auto/network/socket/qtcpsocket/tst_qtcpsocket.cpp
	tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
	tools/configure/configureapp.cpp

Change-Id: Ic6168d82e51a0ef1862c3a63bee6722e8f138414

5 files changed, 39 insertions, 29 deletions

diff --git a/src/widgets/itemviews/qtreeview.cpp b/src/widgets/itemviews/qtreeview.cpp
index 57092a7cdc..0ccb989198 100644
--- a/src/widgets/itemviews/qtreeview.cpp
+++ b/src/widgets/itemviews/qtreeview.cpp
@@ -2830,10 +2830,14 @@ void QTreeView::updateGeometries()
         if (d->geometryRecursionBlock)
             return;
         d->geometryRecursionBlock = true;
-        QSize hint = d->header->isHidden() ? QSize(0, 0) : d->header->sizeHint();
-        setViewportMargins(0, hint.height(), 0, 0);
+        int height = 0;
+        if (!d->header->isHidden()) {
+            height = qMax(d->header->minimumHeight(), d->header->sizeHint().height());
+            height = qMin(height, d->header->maximumHeight());
+        }
+        setViewportMargins(0, height, 0, 0);
         QRect vg = d->viewport->geometry();
-        QRect geometryRect(vg.left(), vg.top() - hint.height(), vg.width(), hint.height());
+        QRect geometryRect(vg.left(), vg.top() - height, vg.width(), height);
         d->header->setGeometry(geometryRect);
         QMetaObject::invokeMethod(d->header, "updateGeometries");
         d->updateScrollBars();
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index d2e760da90..b2b5c539e5 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -12349,21 +12349,20 @@ static inline bool canMapPosition(QWindow *window)
 */
 QPoint QWidget::mapToGlobal(const QPoint &pos) const
 {
-    int x = pos.x(), y = pos.y();
-    const QWidget *w = this;
-    while (w) {
 #ifndef QT_NO_GRAPHICSVIEW
-        const QWidgetPrivate *d = w->d_func();
-        if (d->extra && d->extra->proxyWidget && d->extra->proxyWidget->scene()) {
-            const QList <QGraphicsView *> views = d->extra->proxyWidget->scene()->views();
-            if (!views.isEmpty()) {
-                const QPointF scenePos = d->extra->proxyWidget->mapToScene(QPoint(x, y));
-                const QPoint viewPortPos = views.first()->mapFromScene(scenePos);
-                return views.first()->viewport()->mapToGlobal(viewPortPos);
-            }
+    Q_D(const QWidget);
+    if (d->extra && d->extra->proxyWidget && d->extra->proxyWidget->scene()) {
+        const QList <QGraphicsView *> views = d->extra->proxyWidget->scene()->views();
+        if (!views.isEmpty()) {
+            const QPointF scenePos = d->extra->proxyWidget->mapToScene(pos);
+            const QPoint viewPortPos = views.first()->mapFromScene(scenePos);
+            return views.first()->viewport()->mapToGlobal(viewPortPos);
         }
+    }
 #endif // !QT_NO_GRAPHICSVIEW
-
+    int x = pos.x(), y = pos.y();
+    const QWidget *w = this;
+    while (w) {
         QWindow *window = w->windowHandle();
         if (window && canMapPosition(window))
             return window->mapToGlobal(QPoint(x, y));
@@ -12385,21 +12384,20 @@ QPoint QWidget::mapToGlobal(const QPoint &pos) const
 */
 QPoint QWidget::mapFromGlobal(const QPoint &pos) const
 {
-    int x = pos.x(), y = pos.y();
-    const QWidget *w = this;
-    while (w) {
 #ifndef QT_NO_GRAPHICSVIEW
-        const QWidgetPrivate *d = w->d_func();
-        if (d->extra && d->extra->proxyWidget && d->extra->proxyWidget->scene()) {
-            const QList <QGraphicsView *> views = d->extra->proxyWidget->scene()->views();
-            if (!views.isEmpty()) {
-                const QPoint viewPortPos = views.first()->viewport()->mapFromGlobal(QPoint(x, y));
-                const QPointF scenePos = views.first()->mapToScene(viewPortPos);
-                return d->extra->proxyWidget->mapFromScene(scenePos).toPoint();
-            }
+    Q_D(const QWidget);
+    if (d->extra && d->extra->proxyWidget && d->extra->proxyWidget->scene()) {
+        const QList <QGraphicsView *> views = d->extra->proxyWidget->scene()->views();
+        if (!views.isEmpty()) {
+            const QPoint viewPortPos = views.first()->viewport()->mapFromGlobal(pos);
+            const QPointF scenePos = views.first()->mapToScene(viewPortPos);
+            return d->extra->proxyWidget->mapFromScene(scenePos).toPoint();
         }
+    }
 #endif // !QT_NO_GRAPHICSVIEW
-
+    int x = pos.x(), y = pos.y();
+    const QWidget *w = this;
+    while (w) {
         QWindow *window = w->windowHandle();
         if (window && canMapPosition(window))
             return window->mapFromGlobal(QPoint(x, y));
diff --git a/src/widgets/kernel/qwidgetwindow.cpp b/src/widgets/kernel/qwidgetwindow.cpp
index 3637b76aa9..6f8d97e028 100644
--- a/src/widgets/kernel/qwidgetwindow.cpp
+++ b/src/widgets/kernel/qwidgetwindow.cpp
@@ -445,7 +445,7 @@ void QWidgetWindow::handleMouseEvent(QMouseEvent *event)
                 receiver = popupChild;
             if (receiver != popup)
                 widgetPos = receiver->mapFromGlobal(event->globalPos());
-            QWidget *alien = receiver->childAt(receiver->mapFromGlobal(event->globalPos()));
+            QWidget *alien = m_widget->childAt(m_widget->mapFromGlobal(event->globalPos()));
             QMouseEvent e(event->type(), widgetPos, event->windowPos(), event->screenPos(),
                           event->button(), event->buttons(), event->modifiers(), event->source());
             e.setTimestamp(event->timestamp());
diff --git a/src/widgets/util/qsystemtrayicon.cpp b/src/widgets/util/qsystemtrayicon.cpp
index 31bbbb9739..ebb29211a4 100644
--- a/src/widgets/util/qsystemtrayicon.cpp
+++ b/src/widgets/util/qsystemtrayicon.cpp
@@ -687,6 +687,10 @@ void QSystemTrayIconPrivate::install_sys_qpa()
 
 void QSystemTrayIconPrivate::remove_sys_qpa()
 {
+    QObject::disconnect(qpa_sys, SIGNAL(activated(QPlatformSystemTrayIcon::ActivationReason)),
+                        q_func(), SLOT(_q_emitActivated(QPlatformSystemTrayIcon::ActivationReason)));
+    QObject::disconnect(qpa_sys, &QPlatformSystemTrayIcon::messageClicked,
+                        q_func(), &QSystemTrayIcon::messageClicked);
     qpa_sys->cleanup();
 }
 
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index ed3af90532..35c54f102f 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -2432,7 +2432,11 @@ struct IndexSetter {
     int index;
     QComboBox *cb;
 
-    void operator()(void) { cb->setCurrentIndex(index); }
+    void operator()(void)
+    {
+        cb->setCurrentIndex(index);
+        emit cb->activated(index);
+    }
 };
 }