diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/quick/items/qquicklistview.cpp | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/src/quick/items/qquicklistview.cpp b/src/quick/items/qquicklistview.cpp index 9b72e13bd9..9dd85ded19 100644 --- a/src/quick/items/qquicklistview.cpp +++ b/src/quick/items/qquicklistview.cpp @@ -1967,8 +1967,30 @@ QQuickItemViewAttached *QQuickListViewPrivate::getAttachedObject(const QObject * The list view itself is a focus scope (see \l{Keyboard Focus in Qt Quick} for more details). Delegates are instantiated as needed and may be destroyed at any time. - They are parented to ListView's \l {Flickable::contentItem}{contentItem}, not to the view itself. - State should \e never be stored in a delegate. + As such, state should \e never be stored in a delegate. + Delegates are usually parented to ListView's \l {Flickable::contentItem}{contentItem}, but + typically depending on whether it's visible in the view or not, the \l parent + can change, and sometimes be \c null. Because of that, binding to + the parent's properties from within the delegate is \i not recommended. If you + want the delegate to fill out the width of the ListView, consider + using one of the following approaches instead: + + \code + ListView { + id: listView + // ... + + delegate: Item { + // Incorrect. + width: parent.width + + // Correct. + width: listView.width + width: ListView.view.width + // ... + } + } + \endcode ListView attaches a number of properties to the root item of the delegate, for example \c ListView.isCurrentItem. In the following example, the root delegate item can access |