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-rw-r--r--src/corelib/itemmodels/itemmodels.pri8
-rw-r--r--src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp750
-rw-r--r--src/corelib/itemmodels/qconcatenatetablesproxymodel.h100
3 files changed, 858 insertions, 0 deletions
diff --git a/src/corelib/itemmodels/itemmodels.pri b/src/corelib/itemmodels/itemmodels.pri
index 068a8c4b3a..5a977c6623 100644
--- a/src/corelib/itemmodels/itemmodels.pri
+++ b/src/corelib/itemmodels/itemmodels.pri
@@ -20,6 +20,14 @@ qtConfig(proxymodel) {
SOURCES += \
itemmodels/qabstractproxymodel.cpp
+ qtConfig(concatenatetablesproxymodel) {
+ HEADERS += \
+ itemmodels/qconcatenatetablesproxymodel.h
+
+ SOURCES += \
+ itemmodels/qconcatenatetablesproxymodel.cpp
+ }
+
qtConfig(identityproxymodel) {
HEADERS += \
itemmodels/qidentityproxymodel.h
diff --git a/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp b/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp
new file mode 100644
index 0000000000..bbfe2dce16
--- /dev/null
+++ b/src/corelib/itemmodels/qconcatenatetablesproxymodel.cpp
@@ -0,0 +1,750 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author David Faure <david.faure@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qconcatenatetablesproxymodel.h"
+#include <private/qabstractitemmodel_p.h>
+#include "qsize.h"
+#include "qdebug.h"
+
+QT_BEGIN_NAMESPACE
+
+class QConcatenateTablesProxyModelPrivate : public QAbstractItemModelPrivate
+{
+ Q_DECLARE_PUBLIC(QConcatenateTablesProxyModel);
+
+public:
+ QConcatenateTablesProxyModelPrivate();
+
+ int computeRowsPrior(const QAbstractItemModel *sourceModel) const;
+
+ struct SourceModelForRowResult
+ {
+ SourceModelForRowResult() : sourceModel(Q_NULLPTR), sourceRow(-1) {}
+ QAbstractItemModel *sourceModel;
+ int sourceRow;
+ };
+ SourceModelForRowResult sourceModelForRow(int row) const;
+
+ void _q_slotRowsAboutToBeInserted(const QModelIndex &, int start, int end);
+ void _q_slotRowsInserted(const QModelIndex &, int start, int end);
+ void _q_slotRowsAboutToBeRemoved(const QModelIndex &, int start, int end);
+ void _q_slotRowsRemoved(const QModelIndex &, int start, int end);
+ void _q_slotColumnsAboutToBeInserted(const QModelIndex &parent, int start, int end);
+ void _q_slotColumnsInserted(const QModelIndex &parent, int, int);
+ void _q_slotColumnsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
+ void _q_slotColumnsRemoved(const QModelIndex &parent, int, int);
+ void _q_slotDataChanged(const QModelIndex &from, const QModelIndex &to, const QVector<int> &roles);
+ void _q_slotSourceLayoutAboutToBeChanged(const QList<QPersistentModelIndex> &sourceParents, QAbstractItemModel::LayoutChangeHint hint);
+ void _q_slotSourceLayoutChanged(const QList<QPersistentModelIndex> &sourceParents, QAbstractItemModel::LayoutChangeHint hint);
+ void _q_slotModelAboutToBeReset();
+ void _q_slotModelReset();
+ int columnCountAfterChange(const QAbstractItemModel *model, int newCount) const;
+ int calculatedColumnCount() const;
+ void updateColumnCount();
+ bool mapDropCoordinatesToSource(int row, int column, const QModelIndex &parent,
+ int *sourceRow, int *sourceColumn, QModelIndex *sourceParent, QAbstractItemModel **sourceModel) const;
+
+ QVector<QAbstractItemModel *> m_models;
+ int m_rowCount; // have to maintain it here since we can't compute during model destruction
+ int m_columnCount;
+
+ // for columns{AboutToBe,}{Inserted,Removed}
+ int m_newColumnCount;
+
+ // for layoutAboutToBeChanged/layoutChanged
+ QVector<QPersistentModelIndex> layoutChangePersistentIndexes;
+ QVector<QModelIndex> layoutChangeProxyIndexes;
+};
+
+QConcatenateTablesProxyModelPrivate::QConcatenateTablesProxyModelPrivate()
+ : m_rowCount(0),
+ m_columnCount(0),
+ m_newColumnCount(0)
+{
+}
+
+/*!
+ \since 5.13
+ \class QConcatenateTablesProxyModel
+ \inmodule QtCore
+ \brief The QConcatenateTablesProxyModel class proxies multiple source models, concatenating their rows
+
+ \ingroup model-view
+
+ QConcatenateTablesProxyModel takes multiple source models and concatenates their rows.
+
+ In other words, the proxy will have all rows of the first source model,
+ followed by all rows of the second source model, and so on.
+
+ If the source models don't have the same number of columns, the proxy will only
+ have as many columns as the source model with the smallest number of columns.
+ Additional columns in other source models will simply be ignored.
+
+ Source models can be added and removed at runtime, and the column count is adjusted accordingly.
+
+ This proxy does not inherit from QAbstractProxyModel because it uses multiple source
+ models, rather than a single one.
+
+ Only flat models (lists and tables) are supported, tree models are not.
+
+ \sa QAbstractProxyModel, {Model/View Programming}, QIdentityProxyModel, QAbstractItemModel
+ */
+
+
+/*!
+ Constructs a concatenate-rows proxy model with the given \a parent.
+*/
+QConcatenateTablesProxyModel::QConcatenateTablesProxyModel(QObject *parent)
+ : QAbstractItemModel(*new QConcatenateTablesProxyModelPrivate, parent)
+{
+}
+
+/*!
+ Destroys this proxy model.
+*/
+QConcatenateTablesProxyModel::~QConcatenateTablesProxyModel()
+{
+}
+
+/*!
+ Returns the proxy index for a given \a sourceIndex, which can be from any of the source models.
+*/
+QModelIndex QConcatenateTablesProxyModel::mapFromSource(const QModelIndex &sourceIndex) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (!sourceIndex.isValid())
+ return QModelIndex();
+ const QAbstractItemModel *sourceModel = sourceIndex.model();
+ if (!d->m_models.contains(const_cast<QAbstractItemModel *>(sourceModel))) {
+ qWarning("QConcatenateTablesProxyModel: index from wrong model passed to mapFromSource");
+ Q_ASSERT(!"QConcatenateTablesProxyModel: index from wrong model passed to mapFromSource");
+ return QModelIndex();
+ }
+ if (sourceIndex.column() >= d->m_columnCount)
+ return QModelIndex();
+ int rowsPrior = d_func()->computeRowsPrior(sourceModel);
+ return createIndex(rowsPrior + sourceIndex.row(), sourceIndex.column(), sourceIndex.internalPointer());
+}
+
+/*!
+ Returns the source index for a given proxy index.
+*/
+QModelIndex QConcatenateTablesProxyModel::mapToSource(const QModelIndex &proxyIndex) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ Q_ASSERT(checkIndex(proxyIndex));
+ if (!proxyIndex.isValid())
+ return QModelIndex();
+ if (proxyIndex.model() != this) {
+ qWarning("QConcatenateTablesProxyModel: index from wrong model passed to mapToSource");
+ Q_ASSERT(!"QConcatenateTablesProxyModel: index from wrong model passed to mapToSource");
+ return QModelIndex();
+ }
+ const int row = proxyIndex.row();
+ const auto result = d->sourceModelForRow(row);
+ if (!result.sourceModel)
+ return QModelIndex();
+ return result.sourceModel->index(result.sourceRow, proxyIndex.column());
+}
+
+/*!
+ \reimp
+*/
+QVariant QConcatenateTablesProxyModel::data(const QModelIndex &index, int role) const
+{
+ const QModelIndex sourceIndex = mapToSource(index);
+ Q_ASSERT(checkIndex(index, CheckIndexOption::IndexIsValid));
+ if (!sourceIndex.isValid())
+ return QVariant();
+ return sourceIndex.data(role);
+}
+
+/*!
+ \reimp
+*/
+bool QConcatenateTablesProxyModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+ Q_ASSERT(checkIndex(index, CheckIndexOption::IndexIsValid));
+ const QModelIndex sourceIndex = mapToSource(index);
+ Q_ASSERT(sourceIndex.isValid());
+ const auto sourceModel = const_cast<QAbstractItemModel *>(sourceIndex.model());
+ return sourceModel->setData(sourceIndex, value, role);
+}
+
+/*!
+ \reimp
+*/
+QMap<int, QVariant> QConcatenateTablesProxyModel::itemData(const QModelIndex &proxyIndex) const
+{
+ Q_ASSERT(checkIndex(proxyIndex));
+ const QModelIndex sourceIndex = mapToSource(proxyIndex);
+ Q_ASSERT(sourceIndex.isValid());
+ return sourceIndex.model()->itemData(sourceIndex);
+}
+
+/*!
+ \reimp
+*/
+bool QConcatenateTablesProxyModel::setItemData(const QModelIndex &proxyIndex, const QMap<int, QVariant> &roles)
+{
+ Q_ASSERT(checkIndex(proxyIndex));
+ const QModelIndex sourceIndex = mapToSource(proxyIndex);
+ Q_ASSERT(sourceIndex.isValid());
+ const auto sourceModel = const_cast<QAbstractItemModel *>(sourceIndex.model());
+ return sourceModel->setItemData(sourceIndex, roles);
+}
+
+/*!
+ Returns the flags for the given index.
+ If the index is valid, the flags come from the source model for this index.
+ If the index is invalid (as used to determine if dropping onto an empty area
+ in the view is allowed, for instance), the flags from the first model are returned.
+*/
+Qt::ItemFlags QConcatenateTablesProxyModel::flags(const QModelIndex &index) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (d->m_models.isEmpty())
+ return Qt::NoItemFlags;
+ Q_ASSERT(checkIndex(index));
+ if (!index.isValid())
+ return d->m_models.at(0)->flags(index);
+ const QModelIndex sourceIndex = mapToSource(index);
+ Q_ASSERT(sourceIndex.isValid());
+ return sourceIndex.model()->flags(sourceIndex);
+}
+
+/*!
+ This method returns the horizontal header data for the first source model,
+ and the vertical header data for the source model corresponding to each row.
+ \reimp
+*/
+QVariant QConcatenateTablesProxyModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (d->m_models.isEmpty())
+ return QVariant();
+ switch (orientation) {
+ case Qt::Horizontal:
+ return d->m_models.at(0)->headerData(section, orientation, role);
+ case Qt::Vertical: {
+ const auto result = d->sourceModelForRow(section);
+ Q_ASSERT(result.sourceModel);
+ return result.sourceModel->headerData(result.sourceRow, orientation, role);
+ }
+ }
+ return QVariant();
+}
+
+/*!
+ This method returns the column count of the source model with the smallest number of columns.
+ \reimp
+*/
+int QConcatenateTablesProxyModel::columnCount(const QModelIndex &parent) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (parent.isValid())
+ return 0; // flat model
+ return d->m_columnCount;
+}
+
+/*!
+ \reimp
+*/
+QModelIndex QConcatenateTablesProxyModel::index(int row, int column, const QModelIndex &parent) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ Q_ASSERT(hasIndex(row, column, parent));
+ if (!hasIndex(row, column, parent))
+ return QModelIndex();
+ Q_ASSERT(checkIndex(parent, QAbstractItemModel::CheckIndexOption::ParentIsInvalid)); // flat model
+ const auto result = d->sourceModelForRow(row);
+ Q_ASSERT(result.sourceModel);
+ return mapFromSource(result.sourceModel->index(result.sourceRow, column));
+}
+
+/*!
+ \reimp
+*/
+QModelIndex QConcatenateTablesProxyModel::parent(const QModelIndex &index) const
+{
+ Q_UNUSED(index);
+ return QModelIndex(); // flat model, no hierarchy
+}
+
+/*!
+ \reimp
+*/
+int QConcatenateTablesProxyModel::rowCount(const QModelIndex &parent) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ Q_ASSERT(checkIndex(parent, QAbstractItemModel::CheckIndexOption::ParentIsInvalid)); // flat model
+ Q_UNUSED(parent);
+ return d->m_rowCount;
+}
+
+/*!
+ This method returns the mime types for the first source model.
+ \reimp
+*/
+QStringList QConcatenateTablesProxyModel::mimeTypes() const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (d->m_models.isEmpty())
+ return QStringList();
+ return d->m_models.at(0)->mimeTypes();
+}
+
+/*!
+ The call is forwarded to the source model of the first index in the list of \a indexes.
+
+ Important: please note that this proxy only supports dragging a single row.
+ It will assert if called with indexes from multiple rows, because dragging rows that
+ might come from different source models cannot be implemented generically by this proxy model.
+ Each piece of data in the QMimeData needs to be merged, which is data-type-specific.
+ Reimplement this method in a subclass if you want to support dragging multiple rows.
+
+ \reimp
+*/
+QMimeData *QConcatenateTablesProxyModel::mimeData(const QModelIndexList &indexes) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (indexes.isEmpty())
+ return nullptr;
+ const QModelIndex firstIndex = indexes.first();
+ Q_ASSERT(checkIndex(firstIndex, CheckIndexOption::IndexIsValid));
+ const auto result = d->sourceModelForRow(firstIndex.row());
+ QModelIndexList sourceIndexes;
+ sourceIndexes.reserve(indexes.count());
+ for (const QModelIndex &index : indexes) {
+ const QModelIndex sourceIndex = mapToSource(index);
+ Q_ASSERT(sourceIndex.model() == result.sourceModel); // see documentation above
+ sourceIndexes.append(sourceIndex);
+ }
+ return result.sourceModel->mimeData(sourceIndexes);
+}
+
+
+bool QConcatenateTablesProxyModelPrivate::mapDropCoordinatesToSource(int row, int column, const QModelIndex &parent,
+ int *sourceRow, int *sourceColumn, QModelIndex *sourceParent, QAbstractItemModel **sourceModel) const
+{
+ Q_Q(const QConcatenateTablesProxyModel);
+ *sourceColumn = column;
+ if (!parent.isValid()) {
+ // Drop after the last item
+ if (row == -1 || row == m_rowCount) {
+ *sourceRow = -1;
+ *sourceModel = m_models.constLast();
+ return true;
+ }
+ // Drop between toplevel items
+ const auto result = sourceModelForRow(row);
+ Q_ASSERT(result.sourceModel);
+ *sourceRow = result.sourceRow;
+ *sourceModel = result.sourceModel;
+ return true;
+ } else {
+ if (row > -1)
+ return false; // flat model, no dropping as new children of items
+ // Drop onto item
+ const int targetRow = parent.row();
+ const auto result = sourceModelForRow(targetRow);
+ Q_ASSERT(result.sourceModel);
+ const QModelIndex sourceIndex = q->mapToSource(parent);
+ *sourceRow = -1;
+ *sourceParent = sourceIndex;
+ *sourceModel = result.sourceModel;
+ return true;
+ }
+}
+
+/*!
+ \reimp
+*/
+bool QConcatenateTablesProxyModel::canDropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (d->m_models.isEmpty())
+ return false;
+
+ int sourceRow, sourceColumn;
+ QModelIndex sourceParent;
+ QAbstractItemModel *sourceModel;
+ if (!d->mapDropCoordinatesToSource(row, column, parent, &sourceRow, &sourceColumn, &sourceParent, &sourceModel))
+ return false;
+ return sourceModel->canDropMimeData(data, action, sourceRow, sourceColumn, sourceParent);
+}
+
+/*!
+ QConcatenateTablesProxyModel handles dropping onto an item, between items, and after the last item.
+ In all cases the call is forwarded to the underlying source model.
+ When dropping onto an item, the source model for this item is called.
+ When dropping between items, the source model immediately below the drop position is called.
+ When dropping after the last item, the last source model is called.
+
+ \reimp
+*/
+bool QConcatenateTablesProxyModel::dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ if (d->m_models.isEmpty())
+ return false;
+ int sourceRow, sourceColumn;
+ QModelIndex sourceParent;
+ QAbstractItemModel *sourceModel;
+ if (!d->mapDropCoordinatesToSource(row, column, parent, &sourceRow, &sourceColumn, &sourceParent, &sourceModel))
+ return false;
+
+ return sourceModel->dropMimeData(data, action, sourceRow, sourceColumn, sourceParent);
+}
+
+/*!
+ \reimp
+*/
+QSize QConcatenateTablesProxyModel::span(const QModelIndex &index) const
+{
+ Q_D(const QConcatenateTablesProxyModel);
+ Q_ASSERT(checkIndex(index));
+ if (d->m_models.isEmpty() || !index.isValid())
+ return QSize();
+ const QModelIndex sourceIndex = mapToSource(index);
+ Q_ASSERT(sourceIndex.isValid());
+ return sourceIndex.model()->span(sourceIndex);
+}
+
+/*!
+ Adds a source model \a sourceModel, below all previously added source models.
+
+ The ownership of \a sourceModel is not affected by this.
+
+ The same source model cannot be added more than once.
+ */
+void QConcatenateTablesProxyModel::addSourceModel(QAbstractItemModel *sourceModel)
+{
+ Q_D(QConcatenateTablesProxyModel);
+ Q_ASSERT(sourceModel);
+ Q_ASSERT(!d->m_models.contains(sourceModel));
+ connect(sourceModel, SIGNAL(dataChanged(QModelIndex,QModelIndex,QVector<int>)), this, SLOT(_q_slotDataChanged(QModelIndex,QModelIndex,QVector<int>)));
+ connect(sourceModel, SIGNAL(rowsInserted(QModelIndex,int,int)), this, SLOT(_q_slotRowsInserted(QModelIndex,int,int)));
+ connect(sourceModel, SIGNAL(rowsRemoved(QModelIndex,int,int)), this, SLOT(_q_slotRowsRemoved(QModelIndex,int,int)));
+ connect(sourceModel, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)), this, SLOT(_q_slotRowsAboutToBeInserted(QModelIndex,int,int)));
+ connect(sourceModel, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)), this, SLOT(_q_slotRowsAboutToBeRemoved(QModelIndex,int,int)));
+
+ connect(sourceModel, SIGNAL(columnsInserted(QModelIndex,int,int)), this, SLOT(_q_slotColumnsInserted(QModelIndex,int,int)));
+ connect(sourceModel, SIGNAL(columnsRemoved(QModelIndex,int,int)), this, SLOT(_q_slotColumnsRemoved(QModelIndex,int,int)));
+ connect(sourceModel, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)), this, SLOT(_q_slotColumnsAboutToBeInserted(QModelIndex,int,int)));
+ connect(sourceModel, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)), this, SLOT(_q_slotColumnsAboutToBeRemoved(QModelIndex,int,int)));
+
+ connect(sourceModel, SIGNAL(layoutAboutToBeChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)),
+ this, SLOT(_q_slotSourceLayoutAboutToBeChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)));
+ connect(sourceModel, SIGNAL(layoutChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)),
+ this, SLOT(_q_slotSourceLayoutChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint)));
+ connect(sourceModel, SIGNAL(modelAboutToBeReset()), this, SLOT(_q_slotModelAboutToBeReset()));
+ connect(sourceModel, SIGNAL(modelReset()), this, SLOT(_q_slotModelReset()));
+
+ const int newRows = sourceModel->rowCount();
+ if (newRows > 0)
+ beginInsertRows(QModelIndex(), d->m_rowCount, d->m_rowCount + newRows - 1);
+ d->m_rowCount += newRows;
+ d->m_models.append(sourceModel);
+ if (newRows > 0)
+ endInsertRows();
+
+ d->updateColumnCount();
+}
+
+/*!
+ Removes the source model \a sourceModel, which was previously added to this proxy.
+
+ The ownership of \a sourceModel is not affected by this.
+*/
+void QConcatenateTablesProxyModel::removeSourceModel(QAbstractItemModel *sourceModel)
+{
+ Q_D(QConcatenateTablesProxyModel);
+ Q_ASSERT(d->m_models.contains(sourceModel));
+ disconnect(sourceModel, 0, this, 0);
+
+ const int rowsRemoved = sourceModel->rowCount();
+ const int rowsPrior = d->computeRowsPrior(sourceModel); // location of removed section
+
+ if (rowsRemoved > 0)
+ beginRemoveRows(QModelIndex(), rowsPrior, rowsPrior + rowsRemoved - 1);
+ d->m_models.removeOne(sourceModel);
+ d->m_rowCount -= rowsRemoved;
+ if (rowsRemoved > 0)
+ endRemoveRows();
+
+ d->updateColumnCount();
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotRowsAboutToBeInserted(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // not supported, the proxy is a flat model
+ return;
+ const QAbstractItemModel * const model = static_cast<QAbstractItemModel *>(q->sender());
+ const int rowsPrior = computeRowsPrior(model);
+ q->beginInsertRows(QModelIndex(), rowsPrior + start, rowsPrior + end);
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotRowsInserted(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // flat model
+ return;
+ m_rowCount += end - start + 1;
+ q->endInsertRows();
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotRowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // flat model
+ return;
+ const QAbstractItemModel * const model = static_cast<QAbstractItemModel *>(q->sender());
+ const int rowsPrior = computeRowsPrior(model);
+ q->beginRemoveRows(QModelIndex(), rowsPrior + start, rowsPrior + end);
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotRowsRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // flat model
+ return;
+ m_rowCount -= end - start + 1;
+ q->endRemoveRows();
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotColumnsAboutToBeInserted(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // flat model
+ return;
+ const QAbstractItemModel * const model = static_cast<QAbstractItemModel *>(q->sender());
+ const int oldColCount = model->columnCount();
+ const int newColCount = columnCountAfterChange(model, oldColCount + end - start + 1);
+ Q_ASSERT(newColCount >= oldColCount);
+ if (newColCount > oldColCount)
+ // If the underlying models have a different number of columns (example: 2 and 3), inserting 2 columns in
+ // the first model leads to inserting only one column in the proxy, since qMin(2+2,3) == 3.
+ q->beginInsertColumns(QModelIndex(), start, qMin(end, start + newColCount - oldColCount - 1));
+ m_newColumnCount = newColCount;
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotColumnsInserted(const QModelIndex &parent, int start, int end)
+{
+ Q_UNUSED(start);
+ Q_UNUSED(end);
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // flat model
+ return;
+ if (m_newColumnCount != m_columnCount) {
+ m_columnCount = m_newColumnCount;
+ q->endInsertColumns();
+ }
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotColumnsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (parent.isValid()) // flat model
+ return;
+ const QAbstractItemModel * const model = static_cast<QAbstractItemModel *>(q->sender());
+ const int oldColCount = model->columnCount();
+ const int newColCount = columnCountAfterChange(model, oldColCount - (end - start + 1));
+ Q_ASSERT(newColCount <= oldColCount);
+ if (newColCount < oldColCount)
+ q->beginRemoveColumns(QModelIndex(), start, qMax(end, start + oldColCount - newColCount - 1));
+ m_newColumnCount = newColCount;
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotColumnsRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ Q_UNUSED(start);
+ Q_UNUSED(end);
+ if (parent.isValid()) // flat model
+ return;
+ if (m_newColumnCount != m_columnCount) {
+ m_columnCount = m_newColumnCount;
+ q->endRemoveColumns();
+ }
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotDataChanged(const QModelIndex &from, const QModelIndex &to, const QVector<int> &roles)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ Q_ASSERT(from.isValid());
+ Q_ASSERT(to.isValid());
+ const QModelIndex myFrom = q->mapFromSource(from);
+ Q_ASSERT(q->checkIndex(myFrom, QAbstractItemModel::CheckIndexOption::IndexIsValid));
+ const QModelIndex myTo = q->mapFromSource(to);
+ Q_ASSERT(q->checkIndex(myTo, QAbstractItemModel::CheckIndexOption::IndexIsValid));
+ emit q->dataChanged(myFrom, myTo, roles);
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotSourceLayoutAboutToBeChanged(const QList<QPersistentModelIndex> &sourceParents, QAbstractItemModel::LayoutChangeHint hint)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+
+ if (!sourceParents.isEmpty() && !sourceParents.contains(QModelIndex()))
+ return;
+
+ emit q->layoutAboutToBeChanged({}, hint);
+
+ const QModelIndexList persistentIndexList = q->persistentIndexList();
+ layoutChangePersistentIndexes.reserve(persistentIndexList.size());
+ layoutChangeProxyIndexes.reserve(persistentIndexList.size());
+
+ for (const QPersistentModelIndex &proxyPersistentIndex : persistentIndexList) {
+ layoutChangeProxyIndexes.append(proxyPersistentIndex);
+ Q_ASSERT(proxyPersistentIndex.isValid());
+ const QPersistentModelIndex srcPersistentIndex = q->mapToSource(proxyPersistentIndex);
+ Q_ASSERT(srcPersistentIndex.isValid());
+ layoutChangePersistentIndexes << srcPersistentIndex;
+ }
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotSourceLayoutChanged(const QList<QPersistentModelIndex> &sourceParents, QAbstractItemModel::LayoutChangeHint hint)
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ if (!sourceParents.isEmpty() && !sourceParents.contains(QModelIndex()))
+ return;
+ for (int i = 0; i < layoutChangeProxyIndexes.size(); ++i) {
+ const QModelIndex proxyIdx = layoutChangeProxyIndexes.at(i);
+ const QModelIndex newProxyIdx = q->mapFromSource(layoutChangePersistentIndexes.at(i));
+ q->changePersistentIndex(proxyIdx, newProxyIdx);
+ }
+
+ layoutChangePersistentIndexes.clear();
+ layoutChangeProxyIndexes.clear();
+
+ emit q->layoutChanged({}, hint);
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotModelAboutToBeReset()
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ Q_ASSERT(m_models.contains(const_cast<QAbstractItemModel *>(static_cast<const QAbstractItemModel *>(q->sender()))));
+ q->beginResetModel();
+ // A reset might reduce both rowCount and columnCount, and we can't notify of both at the same time,
+ // and notifying of one after the other leaves an intermediary invalid situation.
+ // So the only safe choice is to forward it as a full reset.
+}
+
+void QConcatenateTablesProxyModelPrivate::_q_slotModelReset()
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ Q_ASSERT(m_models.contains(const_cast<QAbstractItemModel *>(static_cast<const QAbstractItemModel *>(q->sender()))));
+ m_columnCount = calculatedColumnCount();
+ m_rowCount = computeRowsPrior(nullptr);
+ q->endResetModel();
+}
+
+int QConcatenateTablesProxyModelPrivate::calculatedColumnCount() const
+{
+ if (m_models.isEmpty())
+ return 0;
+
+ const auto it = std::min_element(m_models.begin(), m_models.end(), [](const QAbstractItemModel* model1, const QAbstractItemModel* model2) {
+ return model1->columnCount() < model2->columnCount();
+ });
+ return (*it)->columnCount();
+}
+
+void QConcatenateTablesProxyModelPrivate::updateColumnCount()
+{
+ Q_Q(QConcatenateTablesProxyModel);
+ const int newColumnCount = calculatedColumnCount();
+ const int columnDiff = newColumnCount - m_columnCount;
+ if (columnDiff > 0) {
+ q->beginInsertColumns(QModelIndex(), m_columnCount, m_columnCount + columnDiff - 1);
+ m_columnCount = newColumnCount;
+ q->endInsertColumns();
+ } else if (columnDiff < 0) {
+ const int lastColumn = m_columnCount - 1;
+ q->beginRemoveColumns(QModelIndex(), lastColumn + columnDiff + 1, lastColumn);
+ m_columnCount = newColumnCount;
+ q->endRemoveColumns();
+ }
+}
+
+int QConcatenateTablesProxyModelPrivate::columnCountAfterChange(const QAbstractItemModel *model, int newCount) const
+{
+ int newColumnCount = 0;
+ for (int i = 0; i < m_models.count(); ++i) {
+ const QAbstractItemModel *mod = m_models.at(i);
+ const int colCount = mod == model ? newCount : mod->columnCount();
+ if (i == 0)
+ newColumnCount = colCount;
+ else
+ newColumnCount = qMin(colCount, newColumnCount);
+ }
+ return newColumnCount;
+}
+
+int QConcatenateTablesProxyModelPrivate::computeRowsPrior(const QAbstractItemModel *sourceModel) const
+{
+ int rowsPrior = 0;
+ for (const QAbstractItemModel *model : m_models) {
+ if (model == sourceModel)
+ break;
+ rowsPrior += model->rowCount();
+ }
+ return rowsPrior;
+}
+
+QConcatenateTablesProxyModelPrivate::SourceModelForRowResult QConcatenateTablesProxyModelPrivate::sourceModelForRow(int row) const
+{
+ QConcatenateTablesProxyModelPrivate::SourceModelForRowResult result;
+ int rowCount = 0;
+ for (QAbstractItemModel *model : m_models) {
+ const int subRowCount = model->rowCount();
+ if (rowCount + subRowCount > row) {
+ result.sourceModel = model;
+ break;
+ }
+ rowCount += subRowCount;
+ }
+ result.sourceRow = row - rowCount;
+ return result;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qconcatenatetablesproxymodel.cpp"
diff --git a/src/corelib/itemmodels/qconcatenatetablesproxymodel.h b/src/corelib/itemmodels/qconcatenatetablesproxymodel.h
new file mode 100644
index 0000000000..85fc6a9c72
--- /dev/null
+++ b/src/corelib/itemmodels/qconcatenatetablesproxymodel.h
@@ -0,0 +1,100 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author David Faure <david.faure@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QCONCATENATEROWSPROXYMODEL_H
+#define QCONCATENATEROWSPROXYMODEL_H
+
+#include <QtCore/qabstractitemmodel.h>
+
+QT_BEGIN_NAMESPACE
+
+class QConcatenateTablesProxyModelPrivate;
+
+class Q_CORE_EXPORT QConcatenateTablesProxyModel : public QAbstractItemModel
+{
+ Q_OBJECT
+
+public:
+ explicit QConcatenateTablesProxyModel(QObject *parent = nullptr);
+ ~QConcatenateTablesProxyModel();
+
+ Q_SCRIPTABLE void addSourceModel(QAbstractItemModel *sourceModel);
+ Q_SCRIPTABLE void removeSourceModel(QAbstractItemModel *sourceModel);
+
+ QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
+ QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
+
+ QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+ bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+ QMap<int, QVariant> itemData(const QModelIndex &proxyIndex) const override;
+ bool setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles) override;
+ Qt::ItemFlags flags(const QModelIndex &index) const override;
+ QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
+ QModelIndex parent(const QModelIndex &index) const override;
+ int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+ QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
+ int columnCount(const QModelIndex &parent = QModelIndex()) const override;
+ QStringList mimeTypes() const override;
+ QMimeData *mimeData(const QModelIndexList &indexes) const override;
+ bool canDropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const override;
+ bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override;
+ QSize span(const QModelIndex &index) const override;
+
+private:
+ Q_DECLARE_PRIVATE(QConcatenateTablesProxyModel)
+ Q_DISABLE_COPY(QConcatenateTablesProxyModel)
+
+ Q_PRIVATE_SLOT(d_func(), void _q_slotRowsAboutToBeInserted(const QModelIndex &, int start, int end))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotRowsInserted(const QModelIndex &, int start, int end))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotRowsAboutToBeRemoved(const QModelIndex &, int start, int end))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotRowsRemoved(const QModelIndex &, int start, int end))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotColumnsAboutToBeInserted(const QModelIndex &parent, int start, int end))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotColumnsInserted(const QModelIndex &parent, int, int))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotColumnsAboutToBeRemoved(const QModelIndex &parent, int start, int end))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotColumnsRemoved(const QModelIndex &parent, int, int))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotDataChanged(const QModelIndex &from, const QModelIndex &to, const QVector<int> &roles))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotSourceLayoutAboutToBeChanged(QList<QPersistentModelIndex>, QAbstractItemModel::LayoutChangeHint))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotSourceLayoutChanged(const QList<QPersistentModelIndex> &, QAbstractItemModel::LayoutChangeHint))
+ Q_PRIVATE_SLOT(d_func(), void _q_slotModelAboutToBeReset())
+ Q_PRIVATE_SLOT(d_func(), void _q_slotModelReset())
+};
+
+QT_END_NAMESPACE
+
+#endif // QCONCATENATEROWSPROXYMODEL_H