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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
//! [0]
beginInsertRows(parent, 2, 4);
//! [0]
//! [1]
beginInsertRows(parent, 4, 5);
//! [1]
//! [2]
beginRemoveRows(parent, 2, 3);
//! [2]
//! [3]
beginInsertColumns(parent, 4, 6);
//! [3]
//! [4]
beginInsertColumns(parent, 6, 8);
//! [4]
//! [5]
beginRemoveColumns(parent, 4, 6);
//! [5]
//! [6]
beginMoveRows(sourceParent, 2, 4, destinationParent, 2);
//! [6]
//! [7]
beginMoveRows(sourceParent, 2, 4, destinationParent, 6);
//! [7]
//! [8]
beginMoveRows(parent, 2, 2, parent, 0);
//! [8]
//! [9]
beginMoveRows(parent, 2, 2, parent, 4);
//! [9]
//! [10]
myData.clear();
reset();
//! [10]
//! [11]
beginResetModel();
myData.clear();
endResetModel();
//! [11]
//! [12]
class CustomDataProxy : public QSortFilterProxyModel
{
Q_OBJECT
public:
CustomDataProxy(QObject *parent)
: QSortFilterProxyModel(parent)
{
}
...
QVariant data(const QModelIndex &index, int role) override
{
if (role != Qt::BackgroundRole)
return QSortFilterProxyModel::data(index, role);
if (m_customData.contains(index.row()))
return m_customData.value(index.row());
return QSortFilterProxyModel::data(index, role);
}
private slots:
void resetInternalData()
{
m_customData.clear();
}
private:
QHash<int, QVariant> m_customData;
};
//! [12]
//! [13]
QVariant text = model->data(index, Qt::DisplayRole);
QVariant decoration = model->data(index, Qt::DecorationRole);
QVariant checkState = model->data(index, Qt::CheckStateRole);
// etc.
//! [13]
//! [14]
std::array<QModelRoleData, 3> roleData = { {
QModelRoleData(Qt::DisplayRole),
QModelRoleData(Qt::DecorationRole),
QModelRoleData(Qt::CheckStateRole)
} };
// Usually, this is not necessary: A QModelRoleDataSpan
// will be built automatically for you when passing an array-like
// container to multiData().
QModelRoleDataSpan span(roleData);
model->multiData(index, span);
// Use roleData[0].data(), roleData[1].data(), etc.
//! [14]
//! [15]
void MyModel::multiData(const QModelIndex &index, QModelRoleDataSpan roleDataSpan) const
{
for (QModelRoleData &roleData : roleDataSpan) {
int role = roleData.role();
// ... obtain the data for index and role ...
roleData.setData(result);
}
}
//! [15]
//! [16]
QVariant MyModel::data(const QModelIndex &index, int role) const
{
QModelRoleData roleData(role);
multiData(index, roleData);
return roleData.data();
}
//! [16]
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