diff options
Diffstat (limited to 'src/corelib/itemmodels/qabstractproxymodel.cpp')
| -rw-r--r-- | src/corelib/itemmodels/qabstractproxymodel.cpp | 179 |
1 files changed, 125 insertions, 54 deletions
diff --git a/src/corelib/itemmodels/qabstractproxymodel.cpp b/src/corelib/itemmodels/qabstractproxymodel.cpp index 492b177708..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. */ @@ -131,15 +177,34 @@ void QAbstractProxyModel::setSourceModel(QAbstractItemModel *sourceModel) d->model.removeBindingUnlessInWrapper(); // Special case to handle nullptr models. Otherwise we will have unwanted // notifications. - if (!sourceModel && d->model == QAbstractItemModelPrivate::staticEmptyModel()) + const QAbstractItemModel *currentModel = d->model.valueBypassingBindings(); + if (!sourceModel && currentModel == QAbstractItemModelPrivate::staticEmptyModel()) return; - if (sourceModel != d->model) { - if (d->model) - disconnect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed())); + 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.setValueBypassingBindings(sourceModel); - connect(d->model, SIGNAL(destroyed()), this, SLOT(_q_sourceModelDestroyed())); + for (const auto &c : connectionTable) + connect(sourceModel, c.signalName, this, c.slotName); } else { d->model.setValueBypassingBindings(QAbstractItemModelPrivate::staticEmptyModel()); } @@ -161,8 +226,7 @@ QAbstractItemModel *QAbstractProxyModel::sourceModel() const QBindable<QAbstractItemModel *> QAbstractProxyModel::bindableSourceModel() { Q_D(QAbstractProxyModel); - return QBindable<QAbstractItemModel *>(QAbstractProxyModelBindable( - &d->model, &QtPrivate::QBindableInterfaceForSourceModel::iface)); + return QBindable<QAbstractItemModel *>(&d->model); } /*! @@ -253,13 +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); } @@ -269,7 +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)); } /*! @@ -295,7 +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); } /*! @@ -394,7 +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); @@ -492,7 +562,8 @@ QHash<int,QByteArray> QAbstractProxyModel::roleNames() const 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 of the source model. + 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 |