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-rw-r--r--src/gui/widgets/qabstractscrollarea.cpp23
1 files changed, 17 insertions, 6 deletions
diff --git a/src/gui/widgets/qabstractscrollarea.cpp b/src/gui/widgets/qabstractscrollarea.cpp
index e1beb98..a00f77a 100644
--- a/src/gui/widgets/qabstractscrollarea.cpp
+++ b/src/gui/widgets/qabstractscrollarea.cpp
@@ -281,8 +281,8 @@ void QAbstractScrollAreaPrivate::init()
scrollBarContainers[Qt::Vertical]->setVisible(false);
QObject::connect(vbar, SIGNAL(valueChanged(int)), q, SLOT(_q_vslide(int)));
QObject::connect(vbar, SIGNAL(rangeChanged(int,int)), q, SLOT(_q_showOrHideScrollBars()), Qt::QueuedConnection);
- viewportFilter = new QAbstractScrollAreaFilter(this);
- viewport->installEventFilter(viewportFilter);
+ viewportFilter.reset(new QAbstractScrollAreaFilter(this));
+ viewport->installEventFilter(viewportFilter.data());
viewport->setFocusProxy(q);
q->setFocusPolicy(Qt::WheelFocus);
q->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
@@ -471,7 +471,12 @@ QAbstractScrollArea::QAbstractScrollArea(QAbstractScrollAreaPrivate &dd, QWidget
:QFrame(dd, parent)
{
Q_D(QAbstractScrollArea);
- d->init();
+ QT_TRY {
+ d->init();
+ } QT_CATCH(...) {
+ d->viewportFilter.reset();
+ QT_RETHROW;
+ }
}
/*!
@@ -483,7 +488,12 @@ QAbstractScrollArea::QAbstractScrollArea(QWidget *parent)
:QFrame(*new QAbstractScrollAreaPrivate, parent)
{
Q_D(QAbstractScrollArea);
- d->init();
+ QT_TRY {
+ d->init();
+ } QT_CATCH(...) {
+ d->viewportFilter.reset();
+ QT_RETHROW;
+ }
}
@@ -493,7 +503,8 @@ QAbstractScrollArea::QAbstractScrollArea(QWidget *parent)
QAbstractScrollArea::~QAbstractScrollArea()
{
Q_D(QAbstractScrollArea);
- delete d->viewportFilter;
+ // reset it here, otherwise we'll have a dangling pointer in ~QWidget
+ d->viewportFilter.reset();
}
@@ -517,7 +528,7 @@ void QAbstractScrollArea::setViewport(QWidget *widget)
d->viewport = widget;
d->viewport->setParent(this);
d->viewport->setFocusProxy(this);
- d->viewport->installEventFilter(d->viewportFilter);
+ d->viewport->installEventFilter(d->viewportFilter.data());
d->layoutChildren();
if (isVisible())
d->viewport->show();