diff options
Diffstat (limited to 'src/quick/items/qquicklistview.cpp')
| -rw-r--r-- | src/quick/items/qquicklistview.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/quick/items/qquicklistview.cpp b/src/quick/items/qquicklistview.cpp index afcddd59fd..1e04282b7e 100644 --- a/src/quick/items/qquicklistview.cpp +++ b/src/quick/items/qquicklistview.cpp @@ -2185,7 +2185,7 @@ QQuickItemViewAttached *QQuickListViewPrivate::getAttachedObject(const QObject * of type \l [QML] {real}, so it is possible to set fractional values like \c 0.1. - \section1 Reusing items + \section1 Reusing Items Since 5.15, ListView can be configured to recycle items instead of instantiating from the \l delegate whenever new rows are flicked into view. This approach improves @@ -2219,6 +2219,18 @@ QQuickItemViewAttached *QQuickListViewPrivate::getAttachedObject(const QObject * \snippet qml/listview/ReusableDelegate.qml 0 \sa {QML Data Models}, GridView, PathView, {Qt Quick Examples - Views} + + \section 1 Variable Delegate Size and Section Labels + + Variable delegate sizes might lead to resizing and skipping of any attached + \l Scrollbar. This is because ListView estimates its content size from + allocated items (usually only the visible items, the rest is assumed to be of + similar size), and variable delegate sizes prevent an accurate estimation. To + reduce this effect, \l ItemView::cacheBuffer can be set to higher values, + effectively creating more items and improving the size estimate of unallocated + items, at the expense of additional memory usage. Sections have the same effect + because they attach and elongate the section label to the first item within + the section. */ QQuickListView::QQuickListView(QQuickItem *parent) : QQuickItemView(*(new QQuickListViewPrivate), parent) |