Add a method to clear the data to QStandardItemModel

After the behavior of setItemData has been changed following QTBUG-45114,
QStandardItemModel was lacking an interface to clear all the data from a single index.

Task-number: QTBUG-69616
Change-Id: Ide0b5bb6358439fc42c474df8b044fbace6def8d
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: David Faure <david.faure@kdab.com>

2 files changed, 20 insertions, 0 deletions

diff --git a/src/corelib/itemmodels/qabstractitemmodel.cpp b/src/corelib/itemmodels/qabstractitemmodel.cpp
index 3a6f67521f..e816add91d 100644
--- a/src/corelib/itemmodels/qabstractitemmodel.cpp
+++ b/src/corelib/itemmodels/qabstractitemmodel.cpp
@@ -1866,6 +1866,23 @@ bool QAbstractItemModel::setData(const QModelIndex &index, const QVariant &value
     return false;
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+/*!
+    \since 6.0
+    Removes the data stored in all the roles for the given \a index.
+    Returns \c{true} if successful; otherwise returns \c{false}.
+    The dataChanged() signal should be emitted if the data was successfully
+    removed.
+    The base class implementation returns \c{false}
+    \sa data(), itemData(), setData(), setItemData()
+*/
+bool QAbstractItemModel::clearItemData(const QModelIndex &index)
+{
+    Q_UNUSED(index);
+    return false;
+}
+#endif
+
 /*!
     \fn QVariant QAbstractItemModel::data(const QModelIndex &index, int role) const = 0
 
diff --git a/src/corelib/itemmodels/qabstractitemmodel.h b/src/corelib/itemmodels/qabstractitemmodel.h
index 21171124f9..bec71b0606 100644
--- a/src/corelib/itemmodels/qabstractitemmodel.h
+++ b/src/corelib/itemmodels/qabstractitemmodel.h
@@ -198,6 +198,9 @@ public:
 
     virtual QMap<int, QVariant> itemData(const QModelIndex &index) const;
     virtual bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    virtual bool clearItemData(const QModelIndex &index);
+#endif
 
     virtual QStringList mimeTypes() const;
     virtual QMimeData *mimeData(const QModelIndexList &indexes) const;