QS60Style: Sometimes progressbars do not animate

Style removes every progressbar from animation list whenever
*any* QWidget is hidden/shown. To ensure that the animation list is
only tempered with possible animation supporting qwidgets,
re-interpret cast them to QProgressBar. If this works, then
clear the animation list.

Task-number: QTBUG-9836
Reviewed-by: Alessandro Portale

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gui/styles/qs60style.cpp b/src/gui/styles/qs60style.cpp
index 28cbc45..f154b2d 100644
--- a/src/gui/styles/qs60style.cpp
+++ b/src/gui/styles/qs60style.cpp
@@ -3313,8 +3313,10 @@ bool QS60Style::eventFilter(QObject *object, QEvent *event)
         break;
     case QEvent::Destroy:
     case QEvent::Hide:
-        d->stopAnimation(QS60StyleEnums::SP_QgnGrafBarWaitAnim);
-        d->m_bars.removeAll(reinterpret_cast<QProgressBar *>(object));
+        if (QProgressBar *bar = reinterpret_cast<QProgressBar *>(object)) {
+            d->stopAnimation(QS60StyleEnums::SP_QgnGrafBarWaitAnim);
+            d->m_bars.removeAll(bar);
+        }
         break;
     default:
         break;