diff options
Diffstat (limited to 'src/gui/itemviews/qabstractitemview.cpp')
| -rw-r--r-- | src/gui/itemviews/qabstractitemview.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/src/gui/itemviews/qabstractitemview.cpp b/src/gui/itemviews/qabstractitemview.cpp index 3e85b67..a4f512b 100644 --- a/src/gui/itemviews/qabstractitemview.cpp +++ b/src/gui/itemviews/qabstractitemview.cpp @@ -1,7 +1,7 @@ /**************************************************************************** ** ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). -** Contact: Qt Software Information (qt-info@nokia.com) +** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of the QtGui module of the Qt Toolkit. ** @@ -34,7 +34,7 @@ ** met: http://www.gnu.org/copyleft/gpl.html. ** ** If you are unsure which license is appropriate for your use, please -** contact the sales department at qt-sales@nokia.com. +** contact the sales department at http://www.qtsoftware.com/contact. ** $QT_END_LICENSE$ ** ****************************************************************************/ @@ -2906,8 +2906,14 @@ void QAbstractItemView::scrollToBottom() void QAbstractItemView::update(const QModelIndex &index) { Q_D(QAbstractItemView); - if (index.isValid()) - d->viewport->update(visualRect(index)); + if (index.isValid()) { + const QRect rect = visualRect(index); + //this test is important for peformance reason + //For example in dataChanged we simply update all the cells without checking + //it can be a major bottleneck to update rects that aren't even part of the viewport + if (d->viewport->geometry().intersects(rect)) + d->viewport->update(rect); + } } /*! |