diff options
Diffstat (limited to 'src/corelib/itemmodels/qabstractproxymodel.cpp')
| -rw-r--r-- | src/corelib/itemmodels/qabstractproxymodel.cpp | 208 |
1 files changed, 155 insertions, 53 deletions
diff --git a/src/corelib/itemmodels/qabstractproxymodel.cpp b/src/corelib/itemmodels/qabstractproxymodel.cpp index e5d8c68e72..abdeefb4da 100644 --- a/src/corelib/itemmodels/qabstractproxymodel.cpp +++ b/src/corelib/itemmodels/qabstractproxymodel.cpp @@ -1,47 +1,12 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** 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. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #include "qabstractproxymodel.h" #include "qitemselectionmodel.h" #include <private/qabstractproxymodel_p.h> #include <QtCore/QSize> #include <QtCore/QStringList> +#include <QtCore/QMap> QT_BEGIN_NAMESPACE @@ -90,6 +55,87 @@ void QAbstractProxyModelPrivate::_q_sourceModelDestroyed() model = QAbstractItemModelPrivate::staticEmptyModel(); } +void QAbstractProxyModelPrivate::emitHeaderDataChanged() +{ + Q_Q(QAbstractProxyModel); + + if (updateHorizontalHeader) { + if (auto columnCount = q->columnCount(); columnCount > 0) + emit q->headerDataChanged(Qt::Horizontal, 0, columnCount - 1); + } + + if (updateVerticalHeader) { + if (auto rowCount = q->rowCount(); rowCount > 0) + emit q->headerDataChanged(Qt::Vertical, 0, rowCount - 1); + } + + updateHorizontalHeader = false; + updateVerticalHeader = false; +} + +void QAbstractProxyModelPrivate::scheduleHeaderUpdate(Qt::Orientation orientation) +{ + const bool isUpdateScheduled = updateHorizontalHeader || updateVerticalHeader; + + if (orientation == Qt::Horizontal && !updateHorizontalHeader) + updateHorizontalHeader = true; + else if (orientation == Qt::Vertical && !updateVerticalHeader) + updateVerticalHeader = true; + else + return; + + if (!isUpdateScheduled) { + Q_Q(QAbstractProxyModel); + QMetaObject::invokeMethod(q, [this]() { emitHeaderDataChanged(); }, Qt::QueuedConnection); + } +} + +void QAbstractProxyModelPrivate::_q_sourceModelRowsAboutToBeInserted(const QModelIndex &parent, int, int) +{ + if (parent.isValid()) + return; + sourceHadZeroRows = model->rowCount() == 0; +} + +void QAbstractProxyModelPrivate::_q_sourceModelRowsInserted(const QModelIndex &parent, int, int) +{ + if (parent.isValid()) + return; + if (sourceHadZeroRows) + scheduleHeaderUpdate(Qt::Horizontal); +} + +void QAbstractProxyModelPrivate::_q_sourceModelRowsRemoved(const QModelIndex &parent, int, int) +{ + if (parent.isValid()) + return; + if (model->rowCount() == 0) + scheduleHeaderUpdate(Qt::Horizontal); +} + +void QAbstractProxyModelPrivate::_q_sourceModelColumnsAboutToBeInserted(const QModelIndex &parent, int, int) +{ + if (parent.isValid()) + return; + sourceHadZeroColumns = model->columnCount() == 0; +} + +void QAbstractProxyModelPrivate::_q_sourceModelColumnsInserted(const QModelIndex &parent, int, int) +{ + if (parent.isValid()) + return; + if (sourceHadZeroColumns) + scheduleHeaderUpdate(Qt::Vertical); +} + +void QAbstractProxyModelPrivate::_q_sourceModelColumnsRemoved(const QModelIndex &parent, int, int) +{ + if (parent.isValid()) + return; + if (model->columnCount() == 0) + scheduleHeaderUpdate(Qt::Vertical); +} + /*! Constructs a proxy model with the given \a parent. */ @@ -128,17 +174,41 @@ QAbstractProxyModel::~QAbstractProxyModel() void QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel) { Q_D(QAbstractProxyModel); - if (sourceModel != d->model) { - if (d->model) - disconnect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed())); + d->model.removeBindingUnlessInWrapper(); + // Special case to handle nullptr models. Otherwise we will have unwanted + // notifications. + const QAbstractItemModel *currentModel = d->model.valueBypassingBindings(); + if (!sourceModel && currentModel == QAbstractItemModelPrivate::staticEmptyModel()) + return; + static const struct { + const char *signalName; + const char *slotName; + } connectionTable[] = { + // clang-format off + { SIGNAL(destroyed()), SLOT(_q_sourceModelDestroyed()) }, + { SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)), SLOT(_q_sourceModelRowsAboutToBeInserted(QModelIndex,int,int)) }, + { SIGNAL(rowsInserted(QModelIndex,int,int)), SLOT(_q_sourceModelRowsInserted(QModelIndex,int,int)) }, + { SIGNAL(rowsRemoved(QModelIndex,int,int)), SLOT(_q_sourceModelRowsRemoved(QModelIndex,int,int)) }, + { SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)), SLOT(_q_sourceModelColumnsAboutToBeInserted(QModelIndex,int,int)) }, + { SIGNAL(columnsInserted(QModelIndex,int,int)), SLOT(_q_sourceModelColumnsInserted(QModelIndex,int,int)) }, + { SIGNAL(columnsRemoved(QModelIndex,int,int)), SLOT(_q_sourceModelColumnsRemoved(QModelIndex,int,int)) } + // clang-format on + }; + + if (sourceModel != currentModel) { + if (currentModel) { + for (const auto &c : connectionTable) + disconnect(currentModel, c.signalName, this, c.slotName); + } if (sourceModel) { - d->model = sourceModel; - connect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed())); + d->model.setValueBypassingBindings(sourceModel); + for (const auto &c : connectionTable) + connect(sourceModel, c.signalName, this, c.slotName); } else { - d->model = QAbstractItemModelPrivate::staticEmptyModel(); + d->model.setValueBypassingBindings(QAbstractItemModelPrivate::staticEmptyModel()); } - emit sourceModelChanged(QPrivateSignal()); + d->model.notify(); } } @@ -153,6 +223,12 @@ QAbstractItemModel *QAbstractProxyModel::sourceModel() const return d->model; } +QBindable<QAbstractItemModel *> QAbstractProxyModel::bindableSourceModel() +{ + Q_D(QAbstractProxyModel); + return QBindable<QAbstractItemModel *>(&d->model); +} + /*! \reimp */ @@ -241,13 +317,17 @@ QVariant QAbstractProxyModel::data(const QModelIndex &proxyIndex, int role) cons QVariant QAbstractProxyModel::headerData(int section, Qt::Orientation orientation, int role) const { Q_D(const QAbstractProxyModel); - int sourceSection; + int sourceSection = section; if (orientation == Qt::Horizontal) { - const QModelIndex proxyIndex = index(0, section); - sourceSection = mapToSource(proxyIndex).column(); + if (rowCount() > 0) { + const QModelIndex proxyIndex = index(0, section); + sourceSection = mapToSource(proxyIndex).column(); + } } else { - const QModelIndex proxyIndex = index(section, 0); - sourceSection = mapToSource(proxyIndex).row(); + if (columnCount() > 0) { + const QModelIndex proxyIndex = index(section, 0); + sourceSection = mapToSource(proxyIndex).row(); + } } return d->model->headerData(sourceSection, orientation, role); } @@ -257,7 +337,8 @@ QVariant QAbstractProxyModel::headerData(int section, Qt::Orientation orientatio */ QMap<int, QVariant> QAbstractProxyModel::itemData(const QModelIndex &proxyIndex) const { - return QAbstractItemModel::itemData(proxyIndex); + Q_D(const QAbstractProxyModel); + return d->model->itemData(mapToSource(proxyIndex)); } /*! @@ -283,7 +364,8 @@ bool QAbstractProxyModel::setData(const QModelIndex &index, const QVariant &valu */ bool QAbstractProxyModel::setItemData(const QModelIndex &index, const QMap< int, QVariant >& roles) { - return QAbstractItemModel::setItemData(index, roles); + Q_D(QAbstractProxyModel); + return d->model->setItemData(mapToSource(index), roles); } /*! @@ -382,7 +464,7 @@ QMimeData* QAbstractProxyModel::mimeData(const QModelIndexList &indexes) const { Q_D(const QAbstractProxyModel); QModelIndexList list; - list.reserve(indexes.count()); + list.reserve(indexes.size()); for (const QModelIndex &index : indexes) list << mapToSource(index); return d->model->mimeData(list); @@ -474,6 +556,26 @@ QHash<int,QByteArray> QAbstractProxyModel::roleNames() const return d->model->roleNames(); } +/*! + Equivalent to calling createIndex on the source model. + + This method is useful if your proxy model wants to maintain the + parent-child relationship of items in the source model. + When reimplementing mapToSource(), you can call this method to + create an index for row \a row and column \a col of the source model. + + A typical use would be to save the internal pointer coming from the source model + in the proxy index when reimplementing mapFromSource() and use the same internal + pointer as \a internalPtr to recover the original source index when + reimplementing mapToSource(). + \since 6.2 + */ +QModelIndex QAbstractProxyModel::createSourceIndex(int row, int col, void *internalPtr) const +{ + if (sourceModel()) + return sourceModel()->createIndex(row, col, internalPtr); + return QModelIndex(); +} QT_END_NAMESPACE |