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Diffstat (limited to 'src/gui/itemviews/qstandarditemmodel.cpp')
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diff --git a/src/gui/itemviews/qstandarditemmodel.cpp b/src/gui/itemviews/qstandarditemmodel.cpp new file mode 100644 index 0000000..61e410d --- /dev/null +++ b/src/gui/itemviews/qstandarditemmodel.cpp @@ -0,0 +1,3108 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qstandarditemmodel.h" + +#ifndef QT_NO_STANDARDITEMMODEL + +#include <QtCore/qdatetime.h> +#include <QtCore/qlist.h> +#include <QtCore/qmap.h> +#include <QtCore/qpair.h> +#include <QtCore/qvariant.h> +#include <QtCore/qvector.h> +#include <QtCore/qstringlist.h> +#include <QtCore/qbitarray.h> +#include <QtCore/qmimedata.h> + +#include <private/qstandarditemmodel_p.h> +#include <qdebug.h> + +QT_BEGIN_NAMESPACE + +class QStandardItemModelLessThan +{ +public: + inline QStandardItemModelLessThan() + { } + + inline bool operator()(const QPair<QStandardItem*, int> &l, + const QPair<QStandardItem*, int> &r) const + { + return *(l.first) < *(r.first); + } +}; + +class QStandardItemModelGreaterThan +{ +public: + inline QStandardItemModelGreaterThan() + { } + + inline bool operator()(const QPair<QStandardItem*, int> &l, + const QPair<QStandardItem*, int> &r) const + { + return *(r.first) < *(l.first); + } +}; + +/*! + \internal +*/ +QStandardItemPrivate::~QStandardItemPrivate() +{ + QVector<QStandardItem*>::const_iterator it; + for (it = children.constBegin(); it != children.constEnd(); ++it) { + QStandardItem *child = *it; + if (child) + child->d_func()->setModel(0); + delete child; + } + children.clear(); + if (parent && model) + parent->d_func()->childDeleted(q_func()); +} + +/*! + \internal +*/ +QPair<int, int> QStandardItemPrivate::position() const +{ + if (QStandardItem *par = parent) { + int idx = par->d_func()->childIndex(q_func()); + if (idx == -1) + return QPair<int, int>(-1, -1); + return QPair<int, int>(idx / par->columnCount(), idx % par->columnCount()); + } + // ### support header items? + return QPair<int, int>(-1, -1); +} + +/*! + \internal +*/ +void QStandardItemPrivate::setChild(int row, int column, QStandardItem *item, + bool emitChanged) +{ + Q_Q(QStandardItem); + if (item == q) { + qWarning("QStandardItem::setChild: Can't make an item a child of itself %p", + item); + return; + } + if ((row < 0) || (column < 0)) + return; + if (rows <= row) + q->setRowCount(row + 1); + if (columns <= column) + q->setColumnCount(column + 1); + int index = childIndex(row, column); + Q_ASSERT(index != -1); + QStandardItem *oldItem = children.at(index); + if (item == oldItem) + return; + if (item) { + if (item->d_func()->parent == 0) { + item->d_func()->setParentAndModel(q, model); + } else { + qWarning("QStandardItem::setChild: Ignoring duplicate insertion of item %p", + item); + return; + } + } + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + children.replace(index, item); + if (emitChanged && model) + model->d_func()->itemChanged(item); +} + + +/*! + \internal +*/ +void QStandardItemPrivate::changeFlags(bool enable, Qt::ItemFlags f) +{ + Q_Q(QStandardItem); + Qt::ItemFlags flags = q->flags(); + if (enable) + flags |= f; + else + flags &= ~f; + q->setFlags(flags); +} + +/*! + \internal +*/ +void QStandardItemPrivate::childDeleted(QStandardItem *child) +{ + int index = childIndex(child); + Q_ASSERT(index != -1); + children.replace(index, 0); +} + +/*! + \internal +*/ +void QStandardItemPrivate::setItemData(const QMap<int, QVariant> &roles) +{ + Q_Q(QStandardItem); + + //let's build the vector of new values + QVector<QWidgetItemData> newValues; + QMap<int, QVariant>::const_iterator it; + for (it = roles.begin(); it != roles.end(); ++it) { + QVariant value = it.value(); + if (value.isValid()) { + int role = it.key(); + role = (role == Qt::EditRole) ? Qt::DisplayRole : role; + QWidgetItemData wid(role,it.value()); + newValues.append(wid); + } + } + + if (values!=newValues) { + values=newValues; + if (model) + model->d_func()->itemChanged(q); + } +} + +/*! + \internal +*/ +const QMap<int, QVariant> QStandardItemPrivate::itemData() const +{ + QMap<int, QVariant> result; + QVector<QWidgetItemData>::const_iterator it; + for (it = values.begin(); it != values.end(); ++it) + result.insert((*it).role, (*it).value); + return result; +} + +/*! + \internal +*/ +void QStandardItemPrivate::sortChildren(int column, Qt::SortOrder order) +{ + Q_Q(QStandardItem); + if (column >= columnCount()) + return; + + QVector<QPair<QStandardItem*, int> > sortable; + QVector<int> unsortable; + + sortable.reserve(rowCount()); + unsortable.reserve(rowCount()); + + for (int row = 0; row < rowCount(); ++row) { + QStandardItem *itm = q->child(row, column); + if (itm) + sortable.append(QPair<QStandardItem*,int>(itm, row)); + else + unsortable.append(row); + } + + if (order == Qt::AscendingOrder) { + QStandardItemModelLessThan lt; + qStableSort(sortable.begin(), sortable.end(), lt); + } else { + QStandardItemModelGreaterThan gt; + qStableSort(sortable.begin(), sortable.end(), gt); + } + + QModelIndexList changedPersistentIndexesFrom, changedPersistentIndexesTo; + QVector<QStandardItem*> sorted_children(children.count()); + for (int i = 0; i < rowCount(); ++i) { + int r = (i < sortable.count() + ? sortable.at(i).second + : unsortable.at(i - sortable.count())); + for (int c = 0; c < columnCount(); ++c) { + QStandardItem *itm = q->child(r, c); + sorted_children[childIndex(i, c)] = itm; + if (model) { + QModelIndex from = model->createIndex(r, c, q); + if (model->d_func()->persistent.indexes.contains(from)) { + QModelIndex to = model->createIndex(i, c, q); + changedPersistentIndexesFrom.append(from); + changedPersistentIndexesTo.append(to); + } + } + } + } + + children = sorted_children; + + if (model) { + model->changePersistentIndexList(changedPersistentIndexesFrom, changedPersistentIndexesTo); + } + + QVector<QStandardItem*>::iterator it; + for (it = children.begin(); it != children.end(); ++it) { + if (*it) + (*it)->d_func()->sortChildren(column, order); + } +} + +/*! + \internal + set the model of this item and all its children + */ +void QStandardItemPrivate::setModel(QStandardItemModel *mod) +{ + if (children.isEmpty()) { + if (model) + model->d_func()->invalidatePersistentIndex(model->indexFromItem(q_ptr)); + model = mod; + } else { + QStack<QStandardItem*> stack; + stack.push(q_ptr); + while (!stack.isEmpty()) { + QStandardItem *itm = stack.pop(); + if (itm->d_func()->model) { + itm->d_func()->model->d_func()->invalidatePersistentIndex(itm->d_func()->model->indexFromItem(itm)); + } + itm->d_func()->model = mod; + const QVector<QStandardItem*> &childList = itm->d_func()->children; + for (int i = 0; i < childList.count(); ++i) { + QStandardItem *chi = childList.at(i); + if (chi) + stack.push(chi); + } + } + } +} + +/*! + \internal +*/ +QStandardItemModelPrivate::QStandardItemModelPrivate() + : root(new QStandardItem), + itemPrototype(0), + sortRole(Qt::DisplayRole) +{ + root->setFlags(Qt::ItemIsDropEnabled); +} + +/*! + \internal +*/ +QStandardItemModelPrivate::~QStandardItemModelPrivate() +{ + delete root; + delete itemPrototype; + qDeleteAll(columnHeaderItems); + qDeleteAll(rowHeaderItems); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::init() +{ + Q_Q(QStandardItemModel); + QObject::connect(q, SIGNAL(dataChanged(QModelIndex,QModelIndex)), + q, SLOT(_q_emitItemChanged(QModelIndex,QModelIndex))); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::_q_emitItemChanged(const QModelIndex &topLeft, + const QModelIndex &bottomRight) +{ + Q_Q(QStandardItemModel); + QModelIndex parent = topLeft.parent(); + for (int row = topLeft.row(); row <= bottomRight.row(); ++row) { + for (int column = topLeft.column(); column <= bottomRight.column(); ++column) { + QModelIndex index = q->index(row, column, parent); + if (QStandardItem *item = itemFromIndex(index)) + emit q->itemChanged(item); + } + } +} + +/*! + \internal +*/ +bool QStandardItemPrivate::insertRows(int row, const QList<QStandardItem*> &items) +{ + Q_Q(QStandardItem); + if ((row < 0) || (row > rowCount())) + return false; + int count = items.count(); + if (model) + model->d_func()->rowsAboutToBeInserted(q, row, row + count - 1); + if (rowCount() == 0) { + if (columnCount() == 0) + q->setColumnCount(1); + children.resize(columnCount() * count); + rows = count; + } else { + rows += count; + int index = childIndex(row, 0); + if (index != -1) + children.insert(index, columnCount() * count, 0); + } + for (int i = 0; i < items.count(); ++i) { + QStandardItem *item = items.at(i); + item->d_func()->model = model; + item->d_func()->parent = q; + int index = childIndex(i + row, 0); + children.replace(index, item); + } + if (model) + model->d_func()->rowsInserted(q, row, count); + return true; +} + +bool QStandardItemPrivate::insertRows(int row, int count, const QList<QStandardItem*> &items) +{ + Q_Q(QStandardItem); + if ((count < 1) || (row < 0) || (row > rowCount())) + return false; + if (model) + model->d_func()->rowsAboutToBeInserted(q, row, row + count - 1); + if (rowCount() == 0) { + children.resize(columnCount() * count); + rows = count; + } else { + rows += count; + int index = childIndex(row, 0); + if (index != -1) + children.insert(index, columnCount() * count, 0); + } + if (!items.isEmpty()) { + int index = childIndex(row, 0); + int limit = qMin(items.count(), columnCount() * count); + for (int i = 0; i < limit; ++i) { + QStandardItem *item = items.at(i); + if (item) { + if (item->d_func()->parent == 0) { + item->d_func()->setParentAndModel(q, model); + } else { + qWarning("QStandardItem::insertRows: Ignoring duplicate insertion of item %p", + item); + item = 0; + } + } + children.replace(index, item); + ++index; + } + } + if (model) + model->d_func()->rowsInserted(q, row, count); + return true; +} + +/*! + \internal +*/ +bool QStandardItemPrivate::insertColumns(int column, int count, const QList<QStandardItem*> &items) +{ + Q_Q(QStandardItem); + if ((count < 1) || (column < 0) || (column > columnCount())) + return false; + if (model) + model->d_func()->columnsAboutToBeInserted(q, column, column + count - 1); + if (columnCount() == 0) { + children.resize(rowCount() * count); + columns = count; + } else { + columns += count; + int index = childIndex(0, column); + for (int row = 0; row < rowCount(); ++row) { + children.insert(index, count, 0); + index += columnCount(); + } + } + if (!items.isEmpty()) { + int limit = qMin(items.count(), rowCount() * count); + for (int i = 0; i < limit; ++i) { + QStandardItem *item = items.at(i); + if (item) { + if (item->d_func()->parent == 0) { + item->d_func()->setParentAndModel(q, model); + } else { + qWarning("QStandardItem::insertColumns: Ignoring duplicate insertion of item %p", + item); + item = 0; + } + } + int r = i / count; + int c = column + (i % count); + int index = childIndex(r, c); + children.replace(index, item); + } + } + if (model) + model->d_func()->columnsInserted(q, column, count); + return true; +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::itemChanged(QStandardItem *item) +{ + Q_Q(QStandardItemModel); + if (item->d_func()->parent == 0) { + // Header item + int idx = columnHeaderItems.indexOf(item); + if (idx != -1) { + emit q->headerDataChanged(Qt::Horizontal, idx, idx); + } else { + idx = rowHeaderItems.indexOf(item); + if (idx != -1) + emit q->headerDataChanged(Qt::Vertical, idx, idx); + } + } else { + // Normal item + QModelIndex index = q->indexFromItem(item); + emit q->dataChanged(index, index); + } +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::rowsAboutToBeInserted(QStandardItem *parent, + int start, int end) +{ + Q_Q(QStandardItemModel); + QModelIndex index = q->indexFromItem(parent); + q->beginInsertRows(index, start, end); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::columnsAboutToBeInserted(QStandardItem *parent, + int start, int end) +{ + Q_Q(QStandardItemModel); + QModelIndex index = q->indexFromItem(parent); + q->beginInsertColumns(index, start, end); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::rowsAboutToBeRemoved(QStandardItem *parent, + int start, int end) +{ + Q_Q(QStandardItemModel); + QModelIndex index = q->indexFromItem(parent); + q->beginRemoveRows(index, start, end); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::columnsAboutToBeRemoved(QStandardItem *parent, + int start, int end) +{ + Q_Q(QStandardItemModel); + QModelIndex index = q->indexFromItem(parent); + q->beginRemoveColumns(index, start, end); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::rowsInserted(QStandardItem *parent, + int row, int count) +{ + Q_Q(QStandardItemModel); + if (parent == root) + rowHeaderItems.insert(row, count, 0); + q->endInsertRows(); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::columnsInserted(QStandardItem *parent, + int column, int count) +{ + Q_Q(QStandardItemModel); + if (parent == root) + columnHeaderItems.insert(column, count, 0); + q->endInsertColumns(); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::rowsRemoved(QStandardItem *parent, + int row, int count) +{ + Q_Q(QStandardItemModel); + if (parent == root) { + for (int i = row; i < row + count; ++i) { + QStandardItem *oldItem = rowHeaderItems.at(i); + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + } + rowHeaderItems.remove(row, count); + } + q->endRemoveRows(); +} + +/*! + \internal +*/ +void QStandardItemModelPrivate::columnsRemoved(QStandardItem *parent, + int column, int count) +{ + Q_Q(QStandardItemModel); + if (parent == root) { + for (int i = column; i < column + count; ++i) { + QStandardItem *oldItem = columnHeaderItems.at(i); + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + } + columnHeaderItems.remove(column, count); + } + q->endRemoveColumns(); +} + +/*! + \class QStandardItem + \brief The QStandardItem class provides an item for use with the + QStandardItemModel class. + \since 4.2 + \ingroup model-view + + Items usually contain text, icons, or checkboxes. + + Each item can have its own background brush which is set with the + setBackground() function. The current background brush can be found with + background(). The text label for each item can be rendered with its own + font and brush. These are specified with the setFont() and setForeground() + functions, and read with font() and foreground(). + + By default, items are enabled, editable, selectable, checkable, and can be + used both as the source of a drag and drop operation and as a drop target. + Each item's flags can be changed by calling setFlags(). Checkable items + can be checked and unchecked with the setCheckState() function. The + corresponding checkState() function indicates whether the item is + currently checked. + + You can store application-specific data in an item by calling setData(). + + Each item can have a two-dimensional table of child items. This makes it + possible to build hierarchies of items. The typical hierarchy is the tree, + in which case the child table is a table with a single column (a list). + + The dimensions of the child table can be set with setRowCount() and + setColumnCount(). Items can be positioned in the child table with + setChild(). Get a pointer to a child item with child(). New rows and + columns of children can also be inserted with insertRow() and + insertColumn(), or appended with appendRow() and appendColumn(). When + using the append and insert functions, the dimensions of the child table + will grow as needed. + + An existing row of children can be removed with removeRow() or takeRow(); + correspondingly, a column can be removed with removeColumn() or + takeColumn(). + + An item's children can be sorted by calling sortChildren(). + + \section1 Subclassing + + When subclassing QStandardItem to provide custom items, it is possible to + define new types for them so that they can be distinguished from the base + class. The type() function should be reimplemented to return a new type + value equal to or greater than \l UserType. + + Reimplement data() and setData() if you want to perform custom handling of + data queries and/or control how an item's data is represented. + + Reimplement clone() if you want QStandardItemModel to be able to create + instances of your custom item class on demand (see + QStandardItemModel::setItemPrototype()). + + Reimplement read() and write() if you want to control how items are + represented in their serialized form. + + Reimplement \l{operator<()} if you want to control the semantics of item + comparison. \l{operator<()} determines the sorted order when sorting items + with sortChildren() or with QStandardItemModel::sort(). + + \sa QStandardItemModel, {Item View Convenience Classes}, {Model/View Programming} +*/ + +/*! + \enum QStandardItem::ItemType + + This enum describes the types that are used to describe standard items. + + \value Type The default type for standard items. + \value UserType The minimum value for custom types. Values below UserType are + reserved by Qt. + + You can define new user types in QStandardItem subclasses to ensure that + custom items are treated specially; for example, when items are sorted. + + \sa type() +*/ + +/*! + Constructs an item. +*/ +QStandardItem::QStandardItem() + : d_ptr(new QStandardItemPrivate) +{ + Q_D(QStandardItem); + d->q_ptr = this; +} + +/*! + Constructs an item with the given \a text. +*/ +QStandardItem::QStandardItem(const QString &text) + : d_ptr(new QStandardItemPrivate) +{ + Q_D(QStandardItem); + d->q_ptr = this; + setText(text); +} + +/*! + Constructs an item with the given \a icon and \a text. +*/ +QStandardItem::QStandardItem(const QIcon &icon, const QString &text) + : d_ptr(new QStandardItemPrivate) +{ + Q_D(QStandardItem); + d->q_ptr = this; + setIcon(icon); + setText(text); +} + +/*! + Constructs an item with \a rows rows and \a columns columns of child items. +*/ +QStandardItem::QStandardItem(int rows, int columns) + : d_ptr(new QStandardItemPrivate) +{ + Q_D(QStandardItem); + d->q_ptr = this; + setRowCount(rows); + setColumnCount(columns); +} + +/*! + \internal +*/ +QStandardItem::QStandardItem(QStandardItemPrivate &dd) + : d_ptr(&dd) +{ + Q_D(QStandardItem); + d->q_ptr = this; +} + +/*! + Constructs a copy of \a other. Note that model() is + not copied. + + This function is useful when reimplementing clone(). +*/ +QStandardItem::QStandardItem(const QStandardItem &other) + : d_ptr(new QStandardItemPrivate) +{ + Q_D(QStandardItem); + d->q_ptr = this; + operator=(other); +} + +/*! + Assigns \a other's data and flags to this item. Note that + type() and model() are not copied. + + This function is useful when reimplementing clone(). +*/ +QStandardItem &QStandardItem::operator=(const QStandardItem &other) +{ + Q_D(QStandardItem); + d->values = other.d_func()->values; + return *this; +} + +/*! + Destructs the item. + This causes the item's children to be destructed as well. +*/ +QStandardItem::~QStandardItem() +{ + Q_D(QStandardItem); + delete d; +} + +/*! + Returns the item's parent item, or 0 if the item has no parent. + + \sa child() +*/ +QStandardItem *QStandardItem::parent() const +{ + Q_D(const QStandardItem); + if (!d->model || (d->model->d_func()->root != d->parent)) + return d->parent; + return 0; +} + +/*! + Sets the item's data for the given \a role to the specified \a value. + + If you subclass QStandardItem and reimplement this function, your + reimplementation should call emitDataChanged() if you do not call + the base implementation of setData(). This will ensure that e.g. + views using the model are notified of the changes. + + \note The default implementation treats Qt::EditRole and Qt::DisplayRole + as referring to the same data. + + \sa Qt::ItemDataRole, data(), setFlags() +*/ +void QStandardItem::setData(const QVariant &value, int role) +{ + Q_D(QStandardItem); + role = (role == Qt::EditRole) ? Qt::DisplayRole : role; + QVector<QWidgetItemData>::iterator it; + for (it = d->values.begin(); it != d->values.end(); ++it) { + if ((*it).role == role) { + if (value.isValid()) { + if ((*it).value.type() == value.type() && (*it).value == value) + return; + (*it).value = value; + } else { + d->values.erase(it); + } + if (d->model) + d->model->d_func()->itemChanged(this); + return; + } + } + d->values.append(QWidgetItemData(role, value)); + if (d->model) + d->model->d_func()->itemChanged(this); +} + +/*! + Returns the item's data for the given \a role, or an invalid + QVariant if there is no data for the role. + + \note The default implementation treats Qt::EditRole and Qt::DisplayRole + as referring to the same data. +*/ +QVariant QStandardItem::data(int role) const +{ + Q_D(const QStandardItem); + role = (role == Qt::EditRole) ? Qt::DisplayRole : role; + QVector<QWidgetItemData>::const_iterator it; + for (it = d->values.begin(); it != d->values.end(); ++it) { + if ((*it).role == role) + return (*it).value; + } + return QVariant(); +} + +/*! + \since 4.4 + + Causes the model associated with this item to emit a + \l{QAbstractItemModel::dataChanged()}{dataChanged}() signal for this + item. + + You normally only need to call this function if you have subclassed + QStandardItem and reimplemented data() and/or setData(). + + \sa setData() +*/ +void QStandardItem::emitDataChanged() +{ + Q_D(QStandardItem); + if (d->model) + d->model->d_func()->itemChanged(this); +} + +/*! + Sets the item flags for the item to \a flags. + + The item flags determine how the user can interact with the item. + This is often used to disable an item. + + \sa flags(), setData() +*/ +void QStandardItem::setFlags(Qt::ItemFlags flags) +{ + setData((int)flags, Qt::UserRole - 1); +} + +/*! + Returns the item flags for the item. + + The item flags determine how the user can interact with the item. + + By default, items are enabled, editable, selectable, checkable, and can be + used both as the source of a drag and drop operation and as a drop target. + + \sa setFlags() +*/ +Qt::ItemFlags QStandardItem::flags() const +{ + QVariant v = data(Qt::UserRole - 1); + if (!v.isValid()) + return (Qt::ItemIsSelectable|Qt::ItemIsEnabled|Qt::ItemIsEditable + |Qt::ItemIsDragEnabled|Qt::ItemIsDropEnabled); + return Qt::ItemFlags(v.toInt()); +} + +/*! + \fn QString QStandardItem::text() const + + Returns the item's text. This is the text that's presented to the user + in a view. + + \sa setText() +*/ + +/*! + \fn void QStandardItem::setText(const QString &text) + + Sets the item's text to the \a text specified. + + \sa text(), setFont(), setForeground() +*/ + +/*! + \fn QIcon QStandardItem::icon() const + + Returns the item's icon. + + \sa setIcon(), {QAbstractItemView::iconSize}{iconSize} +*/ + +/*! + \fn void QStandardItem::setIcon(const QIcon &icon) + + Sets the item's icon to the \a icon specified. +*/ + +/*! + \fn QString QStandardItem::statusTip() const + + Returns the item's status tip. + + \sa setStatusTip(), toolTip(), whatsThis() +*/ + +/*! + \fn void QStandardItem::setStatusTip(const QString &statusTip) + + Sets the item's status tip to the string specified by \a statusTip. + + \sa statusTip(), setToolTip(), setWhatsThis() +*/ + +/*! + \fn QString QStandardItem::toolTip() const + + Returns the item's tooltip. + + \sa setToolTip(), statusTip(), whatsThis() +*/ + +/*! + \fn void QStandardItem::setToolTip(const QString &toolTip) + + Sets the item's tooltip to the string specified by \a toolTip. + + \sa toolTip(), setStatusTip(), setWhatsThis() +*/ + +/*! + \fn QString QStandardItem::whatsThis() const + + Returns the item's "What's This?" help. + + \sa setWhatsThis(), toolTip(), statusTip() +*/ + +/*! + \fn void QStandardItem::setWhatsThis(const QString &whatsThis) + + Sets the item's "What's This?" help to the string specified by \a whatsThis. + + \sa whatsThis(), setStatusTip(), setToolTip() +*/ + +/*! + \fn QFont QStandardItem::font() const + + Returns the font used to render the item's text. + + \sa setFont() +*/ + +/*! + \fn void QStandardItem::setFont(const QFont &font) + + Sets the font used to display the item's text to the given \a font. + + \sa font() setText() setForeground() +*/ + +/*! + \fn QBrush QStandardItem::background() const + + Returns the brush used to render the item's background. + + \sa foreground() setBackground() +*/ + +/*! + \fn void QStandardItem::setBackground(const QBrush &brush) + + Sets the item's background brush to the specified \a brush. + + \sa background() setForeground() +*/ + +/*! + \fn QBrush QStandardItem::foreground() const + + Returns the brush used to render the item's foreground (e.g. text). + + \sa setForeground() background() +*/ + +/*! + \fn void QStandardItem::setForeground(const QBrush &brush) + + Sets the brush used to display the item's foreground (e.g. text) to the + given \a brush. + + \sa foreground() setBackground() setFont() +*/ + +/*! + \fn int QStandardItem::textAlignment() const + + Returns the text alignment for the item's text. +*/ + +/*! + \fn void QStandardItem::setTextAlignment(Qt::Alignment alignment) + + Sets the text alignment for the item's text to the \a alignment + specified. + + \sa textAlignment() +*/ + +/*! + \fn QSize QStandardItem::sizeHint() const + + Returns the size hint set for the item, or an invalid QSize if no + size hint has been set. + + If no size hint has been set, the item delegate will compute the + size hint based on the item data. + + \sa setSizeHint() +*/ + +/*! + \fn void QStandardItem::setSizeHint(const QSize &size) + + Sets the size hint for the item to be \a size. + If no size hint is set, the item delegate will compute the + size hint based on the item data. + + \sa sizeHint() +*/ + +/*! + \fn Qt::CheckState QStandardItem::checkState() const + + Returns the checked state of the item. + + \sa setCheckState(), isCheckable() +*/ + +/*! + \fn void QStandardItem::setCheckState(Qt::CheckState state) + + Sets the check state of the item to be \a state. + + \sa checkState(), setCheckable() +*/ + +/*! + \fn QString QStandardItem::accessibleText() const + + Returns the item's accessible text. + + The accessible text is used by assistive technologies (i.e. for users who + cannot use conventional means of interaction). + + \sa setAccessibleText(), accessibleDescription() +*/ + +/*! + \fn void QStandardItem::setAccessibleText(const QString &accessibleText) + + Sets the item's accessible text to the string specified by \a accessibleText. + + The accessible text is used by assistive technologies (i.e. for users who + cannot use conventional means of interaction). + + \sa accessibleText(), setAccessibleDescription() +*/ + +/*! + \fn QString QStandardItem::accessibleDescription() const + + Returns the item's accessible description. + + The accessible description is used by assistive technologies (i.e. for + users who cannot use conventional means of interaction). + + \sa setAccessibleDescription(), accessibleText() +*/ + +/*! + \fn void QStandardItem::setAccessibleDescription(const QString &accessibleDescription) + + Sets the item's accessible description to the string specified by \a + accessibleDescription. + + The accessible description is used by assistive technologies (i.e. for + users who cannot use conventional means of interaction). + + \sa accessibleDescription(), setAccessibleText() +*/ + +/*! + Sets whether the item is enabled. If \a enabled is true, the item is enabled, + meaning that the user can interact with the item; if \a enabled is false, the + user cannot interact with the item. + + This flag takes presedence over the other item flags; e.g. if an item is not + enabled, it cannot be selected by the user, even if the Qt::ItemIsSelectable + flag has been set. + + \sa isEnabled(), Qt::ItemIsEnabled, setFlags() +*/ +void QStandardItem::setEnabled(bool enabled) +{ + Q_D(QStandardItem); + d->changeFlags(enabled, Qt::ItemIsEnabled); +} + +/*! + \fn bool QStandardItem::isEnabled() const + + Returns whether the item is enabled. + + When an item is enabled, the user can interact with it. The possible + types of interaction are specified by the other item flags, such as + isEditable() and isSelectable(). + + The default value is true. + + \sa setEnabled(), flags() +*/ + +/*! + Sets whether the item is editable. If \a editable is true, the item can be + edited by the user; otherwise, the user cannot edit the item. + + How the user can edit items in a view is determined by the view's edit + triggers; see QAbstractItemView::editTriggers. + + \sa isEditable(), setFlags() +*/ +void QStandardItem::setEditable(bool editable) +{ + Q_D(QStandardItem); + d->changeFlags(editable, Qt::ItemIsEditable); +} + +/*! + \fn bool QStandardItem::isEditable() const + + Returns whether the item can be edited by the user. + + When an item is editable (and enabled), the user can edit the item by + invoking one of the view's edit triggers; see + QAbstractItemView::editTriggers. + + The default value is true. + + \sa setEditable(), flags() +*/ + +/*! + Sets whether the item is selectable. If \a selectable is true, the item + can be selected by the user; otherwise, the user cannot select the item. + + You can control the selection behavior and mode by manipulating their + view properties; see QAbstractItemView::selectionMode and + QAbstractItemView::selectionBehavior. + + \sa isSelectable(), setFlags() +*/ +void QStandardItem::setSelectable(bool selectable) +{ + Q_D(QStandardItem); + d->changeFlags(selectable, Qt::ItemIsSelectable); +} + +/*! + \fn bool QStandardItem::isSelectable() const + + Returns whether the item is selectable by the user. + + The default value is true. + + \sa setSelectable(), flags() +*/ + +/*! + Sets whether the item is user-checkable. If \a checkable is true, the + item can be checked by the user; otherwise, the user cannot check + the item. + + The item delegate will render a checkable item with a check box next to the + item's text. + + \sa isCheckable(), setCheckState(), setTristate() +*/ +void QStandardItem::setCheckable(bool checkable) +{ + Q_D(QStandardItem); + if (checkable && !isCheckable()) { + // make sure there's data for the checkstate role + if (!data(Qt::CheckStateRole).isValid()) + setData(Qt::Unchecked, Qt::CheckStateRole); + } + d->changeFlags(checkable, Qt::ItemIsUserCheckable); +} + +/*! + \fn bool QStandardItem::isCheckable() const + + Returns whether the item is user-checkable. + + The default value is false. + + \sa setCheckable(), checkState(), isTristate() +*/ + +/*! + Sets whether the item is tristate. If \a tristate is true, the + item is checkable with three separate states; otherwise, the item + is checkable with two states. (Note that this also requires that + the item is checkable; see isCheckable().) + + \sa isTristate(), setCheckable(), setCheckState() +*/ +void QStandardItem::setTristate(bool tristate) +{ + Q_D(QStandardItem); + d->changeFlags(tristate, Qt::ItemIsTristate); +} + +/*! + \fn bool QStandardItem::isTristate() const + + Returns whether the item is tristate; that is, if it's checkable with three + separate states. + + The default value is false. + + \sa setTristate(), isCheckable(), checkState() +*/ + +#ifndef QT_NO_DRAGANDDROP + +/*! + Sets whether the item is drag enabled. If \a dragEnabled is true, the item + can be dragged by the user; otherwise, the user cannot drag the item. + + Note that you also need to ensure that item dragging is enabled in the view; + see QAbstractItemView::dragEnabled. + + \sa isDragEnabled(), setDropEnabled(), setFlags() +*/ +void QStandardItem::setDragEnabled(bool dragEnabled) +{ + Q_D(QStandardItem); + d->changeFlags(dragEnabled, Qt::ItemIsDragEnabled); +} + +/*! + \fn bool QStandardItem::isDragEnabled() const + + Returns whether the item is drag enabled. An item that is drag enabled can + be dragged by the user. + + The default value is true. + + Note that item dragging must be enabled in the view for dragging to work; + see QAbstractItemView::dragEnabled. + + \sa setDragEnabled(), isDropEnabled(), flags() +*/ + +/*! + Sets whether the item is drop enabled. If \a dropEnabled is true, the item + can be used as a drop target; otherwise, it cannot. + + Note that you also need to ensure that drops are enabled in the view; see + QWidget::acceptDrops(); and that the model supports the desired drop actions; + see QAbstractItemModel::supportedDropActions(). + + \sa isDropEnabled(), setDragEnabled(), setFlags() +*/ +void QStandardItem::setDropEnabled(bool dropEnabled) +{ + Q_D(QStandardItem); + d->changeFlags(dropEnabled, Qt::ItemIsDropEnabled); +} + +/*! + \fn bool QStandardItem::isDropEnabled() const + + Returns whether the item is drop enabled. When an item is drop enabled, it + can be used as a drop target. + + The default value is true. + + \sa setDropEnabled(), isDragEnabled(), flags() +*/ + +#endif // QT_NO_DRAGANDDROP + +/*! + Returns the row where the item is located in its parent's child table, or + -1 if the item has no parent. + + \sa column(), parent() +*/ +int QStandardItem::row() const +{ + Q_D(const QStandardItem); + QPair<int, int> pos = d->position(); + return pos.first; +} + +/*! + Returns the column where the item is located in its parent's child table, + or -1 if the item has no parent. + + \sa row(), parent() +*/ +int QStandardItem::column() const +{ + Q_D(const QStandardItem); + QPair<int, int> pos = d->position(); + return pos.second; +} + +/*! + Returns the QModelIndex associated with this item. + + When you need to invoke item functionality in a QModelIndex-based API (e.g. + QAbstractItemView), you can call this function to obtain an index that + corresponds to the item's location in the model. + + If the item is not associated with a model, an invalid QModelIndex is + returned. + + \sa model(), QStandardItemModel::itemFromIndex() +*/ +QModelIndex QStandardItem::index() const +{ + Q_D(const QStandardItem); + return d->model ? d->model->indexFromItem(this) : QModelIndex(); +} + +/*! + Returns the QStandardItemModel that this item belongs to. + + If the item is not a child of another item that belongs to the model, this + function returns 0. + + \sa index() +*/ +QStandardItemModel *QStandardItem::model() const +{ + Q_D(const QStandardItem); + return d->model; +} + +/*! + Sets the number of child item rows to \a rows. If this is less than + rowCount(), the data in the unwanted rows is discarded. + + \sa rowCount(), setColumnCount() +*/ +void QStandardItem::setRowCount(int rows) +{ + int rc = rowCount(); + if (rc == rows) + return; + if (rc < rows) + insertRows(qMax(rc, 0), rows - rc); + else + removeRows(qMax(rows, 0), rc - rows); +} + +/*! + Returns the number of child item rows that the item has. + + \sa setRowCount(), columnCount() +*/ +int QStandardItem::rowCount() const +{ + Q_D(const QStandardItem); + return d->rowCount(); +} + +/*! + Sets the number of child item columns to \a columns. If this is less than + columnCount(), the data in the unwanted columns is discarded. + + \sa columnCount(), setRowCount() +*/ +void QStandardItem::setColumnCount(int columns) +{ + int cc = columnCount(); + if (cc == columns) + return; + if (cc < columns) + insertColumns(qMax(cc, 0), columns - cc); + else + removeColumns(qMax(columns, 0), cc - columns); +} + +/*! + Returns the number of child item columns that the item has. + + \sa setColumnCount(), rowCount() +*/ +int QStandardItem::columnCount() const +{ + Q_D(const QStandardItem); + return d->columnCount(); +} + +/*! + Inserts a row at \a row containing \a items. If necessary, the column + count is increased to the size of \a items. + + \sa insertRows(), insertColumn() +*/ +void QStandardItem::insertRow(int row, const QList<QStandardItem*> &items) +{ + Q_D(QStandardItem); + if (row < 0) + return; + if (columnCount() < items.count()) + setColumnCount(items.count()); + d->insertRows(row, 1, items); +} + +/*! + Inserts \a items at \a row. The column count wont be changed. + + \sa insertRow(), insertColumn() +*/ +void QStandardItem::insertRows(int row, const QList<QStandardItem*> &items) +{ + Q_D(QStandardItem); + if (row < 0) + return; + d->insertRows(row, items); +} + +/*! + Inserts a column at \a column containing \a items. If necessary, + the row count is increased to the size of \a items. + + \sa insertColumns(), insertRow() +*/ +void QStandardItem::insertColumn(int column, const QList<QStandardItem*> &items) +{ + Q_D(QStandardItem); + if (column < 0) + return; + if (rowCount() < items.count()) + setRowCount(items.count()); + d->insertColumns(column, 1, items); +} + +/*! + Inserts \a count rows of child items at row \a row. + + \sa insertRow(), insertColumns() +*/ +void QStandardItem::insertRows(int row, int count) +{ + Q_D(QStandardItem); + if (rowCount() < row) { + count += row - rowCount(); + row = rowCount(); + } + d->insertRows(row, count, QList<QStandardItem*>()); +} + +/*! + Inserts \a count columns of child items at column \a column. + + \sa insertColumn(), insertRows() +*/ +void QStandardItem::insertColumns(int column, int count) +{ + Q_D(QStandardItem); + if (columnCount() < column) { + count += column - columnCount(); + column = columnCount(); + } + d->insertColumns(column, count, QList<QStandardItem*>()); +} + +/*! + \fn void QStandardItem::appendRow(const QList<QStandardItem*> &items) + + Appends a row containing \a items. If necessary, the column count is + increased to the size of \a items. + + \sa insertRow() +*/ + +/*! + \fn void QStandardItem::appendRows(const QList<QStandardItem*> &items) + + Appends rows containing \a items. The column count will not change. + + \sa insertRow() +*/ + +/*! + \fn void QStandardItem::appendColumn(const QList<QStandardItem*> &items) + + Appends a column containing \a items. If necessary, the row count is + increased to the size of \a items. + + \sa insertColumn() +*/ + +/*! + \fn bool QStandardItemModel::insertRow(int row, const QModelIndex &parent) + + Inserts a single row before the given \a row in the child items of the + \a parent specified. Returns true if the row is inserted; otherwise + returns false. + + \sa insertRows(), insertColumn(), removeRow() +*/ + +/*! + \fn bool QStandardItemModel::insertColumn(int column, const QModelIndex &parent) + + Inserts a single column before the given \a column in the child items of + the \a parent specified. Returns true if the column is inserted; otherwise + returns false. + + \sa insertColumns(), insertRow(), removeColumn() +*/ + +/*! + \fn QStandardItem::insertRow(int row, QStandardItem *item) + \overload + + Inserts a row at \a row containing \a item. + + When building a list or a tree that has only one column, this function + provides a convenient way to insert a single new item. +*/ + +/*! + \fn QStandardItem::appendRow(QStandardItem *item) + \overload + + Appends a row containing \a item. + + When building a list or a tree that has only one column, this function + provides a convenient way to append a single new item. +*/ + +/*! + Removes the given \a row. The items that were in the row are deleted. + + \sa takeRow(), removeRows(), removeColumn() +*/ +void QStandardItem::removeRow(int row) +{ + removeRows(row, 1); +} + +/*! + Removes the given \a column. The items that were in the + column are deleted. + + \sa takeColumn(), removeColumns(), removeRow() +*/ +void QStandardItem::removeColumn(int column) +{ + removeColumns(column, 1); +} + +/*! + Removes \a count rows at row \a row. The items that were in those rows are + deleted. + + \sa removeRow(), removeColumn() +*/ +void QStandardItem::removeRows(int row, int count) +{ + Q_D(QStandardItem); + if ((count < 1) || (row < 0) || ((row + count) > rowCount())) + return; + if (d->model) + d->model->d_func()->rowsAboutToBeRemoved(this, row, row + count - 1); + int i = d->childIndex(row, 0); + int n = count * d->columnCount(); + for (int j = i; j < n+i; ++j) { + QStandardItem *oldItem = d->children.at(j); + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + } + d->children.remove(qMax(i, 0), n); + d->rows -= count; + if (d->model) + d->model->d_func()->rowsRemoved(this, row, count); +} + +/*! + Removes \a count columns at column \a column. The items that were in those + columns are deleted. + + \sa removeColumn(), removeRows() +*/ +void QStandardItem::removeColumns(int column, int count) +{ + Q_D(QStandardItem); + if ((count < 1) || (column < 0) || ((column + count) > columnCount())) + return; + if (d->model) + d->model->d_func()->columnsAboutToBeRemoved(this, column, column + count - 1); + for (int row = d->rowCount() - 1; row >= 0; --row) { + int i = d->childIndex(row, column); + for (int j=i; j<i+count; ++j) { + QStandardItem *oldItem = d->children.at(j); + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + } + d->children.remove(i, count); + } + d->columns -= count; + if (d->model) + d->model->d_func()->columnsRemoved(this, column, count); +} + +/*! + Returns true if this item has any children; otherwise returns false. + + \sa rowCount(), columnCount(), child() +*/ +bool QStandardItem::hasChildren() const +{ + return (rowCount() > 0) && (columnCount() > 0); +} + +/*! + Sets the child item at (\a row, \a column) to \a item. This item (the parent + item) takes ownership of \a item. If necessary, the row count and column + count are increased to fit the item. + + \sa child() +*/ +void QStandardItem::setChild(int row, int column, QStandardItem *item) +{ + Q_D(QStandardItem); + d->setChild(row, column, item, true); +} + +/*! + \fn QStandardItem::setChild(int row, QStandardItem *item) + \overload + + Sets the child at \a row to \a item. +*/ + +/*! + Returns the child item at (\a row, \a column) if one has been set; otherwise + returns 0. + + \sa setChild(), takeChild(), parent() +*/ +QStandardItem *QStandardItem::child(int row, int column) const +{ + Q_D(const QStandardItem); + int index = d->childIndex(row, column); + if (index == -1) + return 0; + return d->children.at(index); +} + +/*! + Removes the child item at (\a row, \a column) without deleting it, and returns + a pointer to the item. If there was no child at the given location, then + this function returns 0. + + Note that this function, unlike takeRow() and takeColumn(), does not affect + the dimensions of the child table. + + \sa child(), takeRow(), takeColumn() +*/ +QStandardItem *QStandardItem::takeChild(int row, int column) +{ + Q_D(QStandardItem); + QStandardItem *item = 0; + int index = d->childIndex(row, column); + if (index != -1) { + item = d->children.at(index); + if (item) + item->d_func()->setParentAndModel(0, 0); + d->children.replace(index, 0); + } + return item; +} + +/*! + Removes \a row without deleting the row items, and returns a list of + pointers to the removed items. For items in the row that have not been + set, the corresponding pointers in the list will be 0. + + \sa removeRow(), insertRow(), takeColumn() +*/ +QList<QStandardItem*> QStandardItem::takeRow(int row) +{ + Q_D(QStandardItem); + if ((row < 0) || (row >= rowCount())) + return QList<QStandardItem*>(); + QList<QStandardItem*> items; + int index = d->childIndex(row, 0); + for (int column = 0; column < d->columnCount(); ++column) { + QStandardItem *ch = d->children.at(index); + if (ch) { + ch->d_func()->setParentAndModel(0, 0); + d->children.replace(index, 0); + } + items.append(ch); + ++index; + } + removeRow(row); + return items; +} + +/*! + Removes \a column without deleting the column items, and returns a list of + pointers to the removed items. For items in the column that have not been + set, the corresponding pointers in the list will be 0. + + \sa removeColumn(), insertColumn(), takeRow() +*/ +QList<QStandardItem*> QStandardItem::takeColumn(int column) +{ + Q_D(QStandardItem); + if ((column < 0) || (column >= columnCount())) + return QList<QStandardItem*>(); + QList<QStandardItem*> items; + int index = d->childIndex(0, column); + for (int row = 0; row < d->rowCount(); ++row) { + QStandardItem *ch = d->children.at(index); + if (ch) { + ch->d_func()->setParentAndModel(0, 0); + d->children.replace(index, 0); + } + items.append(ch); + index += d->columnCount(); + } + removeColumn(column); + return items; +} + +/*! + Returns true if this item is less than \a other; otherwise returns false. + + The default implementation uses the data for the item's sort role (see + QStandardItemModel::sortRole) to perform the comparison if the item + belongs to a model; otherwise, the data for the item's Qt::DisplayRole + (text()) is used to perform the comparison. + + sortChildren() and QStandardItemModel::sort() use this function when + sorting items. If you want custom sorting, you can subclass QStandardItem + and reimplement this function. +*/ +bool QStandardItem::operator<(const QStandardItem &other) const +{ + const int role = model() ? model()->sortRole() : Qt::DisplayRole; + const QVariant l = data(role), r = other.data(role); + // this code is copied from QSortFilterProxyModel::lessThan() + switch (l.type()) { + case QVariant::Invalid: + return (r.type() == QVariant::Invalid); + case QVariant::Int: + return l.toInt() < r.toInt(); + case QVariant::UInt: + return l.toUInt() < r.toUInt(); + case QVariant::LongLong: + return l.toLongLong() < r.toLongLong(); + case QVariant::ULongLong: + return l.toULongLong() < r.toULongLong(); + case QVariant::Double: + return l.toDouble() < r.toDouble(); + case QVariant::Char: + return l.toChar() < r.toChar(); + case QVariant::Date: + return l.toDate() < r.toDate(); + case QVariant::Time: + return l.toTime() < r.toTime(); + case QVariant::DateTime: + return l.toDateTime() < r.toDateTime(); + case QVariant::String: + default: + return l.toString().compare(r.toString()) < 0; + } +} + +/*! + Sorts the children of the item using the given \a order, by the values in + the given \a column. + + \note This function is recursive, therefore it sorts the children of the + item, its grandchildren, etc. + + \sa {operator<()} +*/ +void QStandardItem::sortChildren(int column, Qt::SortOrder order) +{ + Q_D(QStandardItem); + if ((column < 0) || (rowCount() == 0)) + return; + if (d->model) + emit d->model->layoutAboutToBeChanged(); + d->sortChildren(column, order); + if (d->model) + emit d->model->layoutChanged(); +} + +/*! + Returns a copy of this item. The item's children are not copied. + + When subclassing QStandardItem, you can reimplement this function + to provide QStandardItemModel with a factory that it can use to + create new items on demand. + + \sa QStandardItemModel::setItemPrototype(), operator=() +*/ +QStandardItem *QStandardItem::clone() const +{ + return new QStandardItem(*this); +} + +/*! + Returns the type of this item. The type is used to distinguish custom + items from the base class. When subclassing QStandardItem, you should + reimplement this function and return a new value greater than or equal + to \l UserType. + + \sa QStandardItem::Type +*/ +int QStandardItem::type() const +{ + return Type; +} + +#ifndef QT_NO_DATASTREAM + +/*! + Reads the item from stream \a in. Only the data and flags of the item are + read, not the child items. + + \sa write() +*/ +void QStandardItem::read(QDataStream &in) +{ + Q_D(QStandardItem); + in >> d->values; + qint32 flags; + in >> flags; + setFlags(Qt::ItemFlags(flags)); +} + +/*! + Writes the item to stream \a out. Only the data and flags of the item + are written, not the child items. + + \sa read() +*/ +void QStandardItem::write(QDataStream &out) const +{ + Q_D(const QStandardItem); + out << d->values; + out << flags(); +} + +/*! + \relates QStandardItem + \since 4.2 + + Reads a QStandardItem from stream \a in into \a item. + + This operator uses QStandardItem::read(). + + \sa {Format of the QDataStream Operators} +*/ +QDataStream &operator>>(QDataStream &in, QStandardItem &item) +{ + item.read(in); + return in; +} + +/*! + \relates QStandardItem + \since 4.2 + + Writes the QStandardItem \a item to stream \a out. + + This operator uses QStandardItem::write(). + + \sa {Format of the QDataStream Operators} +*/ +QDataStream &operator<<(QDataStream &out, const QStandardItem &item) +{ + item.write(out); + return out; +} + +#endif // !QT_NO_DATASTREAM + +/*! + \class QStandardItemModel + \brief The QStandardItemModel class provides a generic model for storing custom data. + \ingroup model-view + + QStandardItemModel can be used as a repository for standard Qt + data types. It is one of the \l {Model/View Classes} and is part + of Qt's \l {Model/View Programming}{model/view} framework. + + QStandardItemModel provides a classic item-based approach to working with + the model. The items in a QStandardItemModel are provided by + QStandardItem. + + QStandardItemModel implements the QAbstractItemModel interface, which + means that the model can be used to provide data in any view that supports + that interface (such as QListView, QTableView and QTreeView, and your own + custom views). For performance and flexibility, you may want to subclass + QAbstractItemModel to provide support for different kinds of data + repositories. For example, the QDirModel provides a model interface to the + underlying file system. + + When you want a list or tree, you typically create an empty + QStandardItemModel and use appendRow() to add items to the model, and + item() to access an item. If your model represents a table, you typically + pass the dimensions of the table to the QStandardItemModel constructor and + use setItem() to position items into the table. You can also use setRowCount() + and setColumnCount() to alter the dimensions of the model. To insert items, + use insertRow() or insertColumn(), and to remove items, use removeRow() or + removeColumn(). + + You can set the header labels of your model with setHorizontalHeaderLabels() + and setVerticalHeaderLabels(). + + You can search for items in the model with findItems(), and sort the model by + calling sort(). + + Call clear() to remove all items from the model. + + An example usage of QStandardItemModel to create a table: + + \snippet doc/src/snippets/code/src_gui_itemviews_qstandarditemmodel.cpp 0 + + An example usage of QStandardItemModel to create a tree: + + \snippet doc/src/snippets/code/src_gui_itemviews_qstandarditemmodel.cpp 1 + + After setting the model on a view, you typically want to react to user + actions, such as an item being clicked. Since a QAbstractItemView provides + QModelIndex-based signals and functions, you need a way to obtain the + QStandardItem that corresponds to a given QModelIndex, and vice + versa. itemFromIndex() and indexFromItem() provide this mapping. Typical + usage of itemFromIndex() includes obtaining the item at the current index + in a view, and obtaining the item that corresponds to an index carried by + a QAbstractItemView signal, such as QAbstractItemView::clicked(). First + you connect the view's signal to a slot in your class: + + \snippet doc/src/snippets/code/src_gui_itemviews_qstandarditemmodel.cpp 2 + + When you receive the signal, you call itemFromIndex() on the given model + index to get a pointer to the item: + + \snippet doc/src/snippets/code/src_gui_itemviews_qstandarditemmodel.cpp 3 + + Conversely, you must obtain the QModelIndex of an item when you want to + invoke a model/view function that takes an index as argument. You can + obtain the index either by using the model's indexFromItem() function, or, + equivalently, by calling QStandardItem::index(): + + \snippet doc/src/snippets/code/src_gui_itemviews_qstandarditemmodel.cpp 4 + + You are, of course, not required to use the item-based approach; you could + instead rely entirely on the QAbstractItemModel interface when working with + the model, or use a combination of the two as appropriate. + + \sa QStandardItem, {Model/View Programming}, QAbstractItemModel, + {itemviews/simpletreemodel}{Simple Tree Model example}, + {Item View Convenience Classes} +*/ + +/*! + \fn void QStandardItemModel::itemChanged(QStandardItem *item) + \since 4.2 + + This signal is emitted whenever the data of \a item has changed. +*/ + +/*! + Constructs a new item model with the given \a parent. +*/ +QStandardItemModel::QStandardItemModel(QObject *parent) + : QAbstractItemModel(*new QStandardItemModelPrivate, parent) +{ + Q_D(QStandardItemModel); + d->init(); + d->root->d_func()->setModel(this); +} + +/*! + Constructs a new item model that initially has \a rows rows and \a columns + columns, and that has the given \a parent. +*/ +QStandardItemModel::QStandardItemModel(int rows, int columns, QObject *parent) + : QAbstractItemModel(*new QStandardItemModelPrivate, parent) +{ + Q_D(QStandardItemModel); + d->init(); + d->root->insertColumns(0, columns); + d->columnHeaderItems.insert(0, columns, 0); + d->root->insertRows(0, rows); + d->rowHeaderItems.insert(0, rows, 0); + d->root->d_func()->setModel(this); +} + +/*! + \internal +*/ +QStandardItemModel::QStandardItemModel(QStandardItemModelPrivate &dd, QObject *parent) + : QAbstractItemModel(dd, parent) +{ + Q_D(QStandardItemModel); + d->init(); +} + +/*! + Destructs the model. The model destroys all its items. +*/ +QStandardItemModel::~QStandardItemModel() +{ +} + +/*! + Removes all items (including header items) from the model and sets the + number of rows and columns to zero. + + \sa removeColumns(), removeRows() +*/ +void QStandardItemModel::clear() +{ + Q_D(QStandardItemModel); + delete d->root; + d->root = new QStandardItem; + d->root->d_func()->setModel(this); + qDeleteAll(d->columnHeaderItems); + d->columnHeaderItems.clear(); + qDeleteAll(d->rowHeaderItems); + d->rowHeaderItems.clear(); + reset(); +} + +/*! + \since 4.2 + + Returns a pointer to the QStandardItem associated with the given \a index. + + Calling this function is typically the initial step when processing + QModelIndex-based signals from a view, such as + QAbstractItemView::activated(). In your slot, you call itemFromIndex(), + with the QModelIndex carried by the signal as argument, to obtain a + pointer to the corresponding QStandardItem. + + Note that this function will lazily create an item for the index (using + itemPrototype()), and set it in the parent item's child table, if no item + already exists at that index. + + If \a index is an invalid index, this function returns 0. + + \sa indexFromItem() +*/ +QStandardItem *QStandardItemModel::itemFromIndex(const QModelIndex &index) const +{ + Q_D(const QStandardItemModel); + if ((index.row() < 0) || (index.column() < 0) || (index.model() != this)) + return 0; + QStandardItem *parent = static_cast<QStandardItem*>(index.internalPointer()); + if (parent == 0) + return 0; + QStandardItem *item = parent->child(index.row(), index.column()); + // lazy part + if (item == 0) { + item = d->createItem(); + parent->d_func()->setChild(index.row(), index.column(), item); + } + return item; +} + +/*! + \since 4.2 + + Returns the QModelIndex associated with the given \a item. + + Use this function when you want to perform an operation that requires the + QModelIndex of the item, such as + QAbstractItemView::scrollTo(). QStandardItem::index() is provided as + convenience; it is equivalent to calling this function. + + \sa itemFromIndex(), QStandardItem::index() +*/ +QModelIndex QStandardItemModel::indexFromItem(const QStandardItem *item) const +{ + if (item && item->d_func()->parent) { + QPair<int, int> pos = item->d_func()->position(); + return createIndex(pos.first, pos.second, item->d_func()->parent); + } + return QModelIndex(); +} + +/*! + \since 4.2 + + Sets the number of rows in this model to \a rows. If + this is less than rowCount(), the data in the unwanted rows + is discarded. + + \sa setColumnCount() +*/ +void QStandardItemModel::setRowCount(int rows) +{ + Q_D(QStandardItemModel); + d->root->setRowCount(rows); +} + +/*! + \since 4.2 + + Sets the number of columns in this model to \a columns. If + this is less than columnCount(), the data in the unwanted columns + is discarded. + + \sa setRowCount() +*/ +void QStandardItemModel::setColumnCount(int columns) +{ + Q_D(QStandardItemModel); + d->root->setColumnCount(columns); +} + +/*! + \since 4.2 + + Sets the item for the given \a row and \a column to \a item. The model + takes ownership of the item. If necessary, the row count and column count + are increased to fit the item. The previous item at the given location (if + there was one) is deleted. + + \sa item() +*/ +void QStandardItemModel::setItem(int row, int column, QStandardItem *item) +{ + Q_D(QStandardItemModel); + d->root->d_func()->setChild(row, column, item, true); +} + +/*! + \fn QStandardItemModel::setItem(int row, QStandardItem *item) + \overload +*/ + +/*! + \since 4.2 + + Returns the item for the given \a row and \a column if one has been set; + otherwise returns 0. + + \sa setItem(), takeItem(), itemFromIndex() +*/ +QStandardItem *QStandardItemModel::item(int row, int column) const +{ + Q_D(const QStandardItemModel); + return d->root->child(row, column); +} + +/*! + \since 4.2 + + Returns the model's invisible root item. + + The invisible root item provides access to the model's top-level items + through the QStandardItem API, making it possible to write functions that + can treat top-level items and their children in a uniform way; for + example, recursive functions involving a tree model. + + \note Calling \l{QAbstractItemModel::index()}{index()} on the QStandardItem object + retrieved from this function is not valid. +*/ +QStandardItem *QStandardItemModel::invisibleRootItem() const +{ + Q_D(const QStandardItemModel); + return d->root; +} + +/*! + \since 4.2 + + Sets the horizontal header item for \a column to \a item. The model takes + ownership of the item. If necessary, the column count is increased to fit + the item. The previous header item (if there was one) is deleted. + + \sa horizontalHeaderItem(), setHorizontalHeaderLabels(), + setVerticalHeaderItem() +*/ +void QStandardItemModel::setHorizontalHeaderItem(int column, QStandardItem *item) +{ + Q_D(QStandardItemModel); + if (column < 0) + return; + if (columnCount() <= column) + setColumnCount(column + 1); + + QStandardItem *oldItem = d->columnHeaderItems.at(column); + if (item == oldItem) + return; + + if (item) { + if (item->model() == 0) { + item->d_func()->setModel(this); + } else { + qWarning("QStandardItem::setHorizontalHeaderItem: Ignoring duplicate insertion of item %p", + item); + return; + } + } + + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + + d->columnHeaderItems.replace(column, item); + emit headerDataChanged(Qt::Horizontal, column, column); +} + +/*! + \since 4.2 + + Returns the horizontal header item for \a column if one has been set; + otherwise returns 0. + + \sa setHorizontalHeaderItem(), verticalHeaderItem() +*/ +QStandardItem *QStandardItemModel::horizontalHeaderItem(int column) const +{ + Q_D(const QStandardItemModel); + if ((column < 0) || (column >= columnCount())) + return 0; + return d->columnHeaderItems.at(column); +} + +/*! + \since 4.2 + + Sets the vertical header item for \a row to \a item. The model takes + ownership of the item. If necessary, the row count is increased to fit the + item. The previous header item (if there was one) is deleted. + + \sa verticalHeaderItem(), setVerticalHeaderLabels(), + setHorizontalHeaderItem() +*/ +void QStandardItemModel::setVerticalHeaderItem(int row, QStandardItem *item) +{ + Q_D(QStandardItemModel); + if (row < 0) + return; + if (rowCount() <= row) + setRowCount(row + 1); + + QStandardItem *oldItem = d->rowHeaderItems.at(row); + if (item == oldItem) + return; + + if (item) { + if (item->model() == 0) { + item->d_func()->setModel(this); + } else { + qWarning("QStandardItem::setVerticalHeaderItem: Ignoring duplicate insertion of item %p", + item); + return; + } + } + + if (oldItem) + oldItem->d_func()->setModel(0); + delete oldItem; + + d->rowHeaderItems.replace(row, item); + emit headerDataChanged(Qt::Vertical, row, row); +} + +/*! + \since 4.2 + + Returns the vertical header item for row \a row if one has been set; + otherwise returns 0. + + \sa setVerticalHeaderItem(), horizontalHeaderItem() +*/ +QStandardItem *QStandardItemModel::verticalHeaderItem(int row) const +{ + Q_D(const QStandardItemModel); + if ((row < 0) || (row >= rowCount())) + return 0; + return d->rowHeaderItems.at(row); +} + +/*! + \since 4.2 + + Sets the horizontal header labels using \a labels. If necessary, the + column count is increased to the size of \a labels. + + \sa setHorizontalHeaderItem() +*/ +void QStandardItemModel::setHorizontalHeaderLabels(const QStringList &labels) +{ + Q_D(QStandardItemModel); + if (columnCount() < labels.count()) + setColumnCount(labels.count()); + for (int i = 0; i < labels.count(); ++i) { + QStandardItem *item = horizontalHeaderItem(i); + if (!item) { + item = d->createItem(); + setHorizontalHeaderItem(i, item); + } + item->setText(labels.at(i)); + } +} + +/*! + \since 4.2 + + Sets the vertical header labels using \a labels. If necessary, the row + count is increased to the size of \a labels. + + \sa setVerticalHeaderItem() +*/ +void QStandardItemModel::setVerticalHeaderLabels(const QStringList &labels) +{ + Q_D(QStandardItemModel); + if (rowCount() < labels.count()) + setRowCount(labels.count()); + for (int i = 0; i < labels.count(); ++i) { + QStandardItem *item = verticalHeaderItem(i); + if (!item) { + item = d->createItem(); + setVerticalHeaderItem(i, item); + } + item->setText(labels.at(i)); + } +} + +/*! + \since 4.2 + + Sets the item prototype for the model to the specified \a item. The model + takes ownership of the prototype. + + The item prototype acts as a QStandardItem factory, by relying on the + QStandardItem::clone() function. To provide your own prototype, subclass + QStandardItem, reimplement QStandardItem::clone() and set the prototype to + be an instance of your custom class. Whenever QStandardItemModel needs to + create an item on demand (for instance, when a view or item delegate calls + setData())), the new items will be instances of your custom class. + + \sa itemPrototype(), QStandardItem::clone() +*/ +void QStandardItemModel::setItemPrototype(const QStandardItem *item) +{ + Q_D(QStandardItemModel); + if (d->itemPrototype != item) { + delete d->itemPrototype; + d->itemPrototype = item; + } +} + +/*! + \since 4.2 + + Returns the item prototype used by the model. The model uses the item + prototype as an item factory when it needs to construct new items on + demand (for instance, when a view or item delegate calls setData()). + + \sa setItemPrototype() +*/ +const QStandardItem *QStandardItemModel::itemPrototype() const +{ + Q_D(const QStandardItemModel); + return d->itemPrototype; +} + +/*! + \since 4.2 + + Returns a list of items that match the given \a text, using the given \a + flags, in the given \a column. +*/ +QList<QStandardItem*> QStandardItemModel::findItems(const QString &text, + Qt::MatchFlags flags, int column) const +{ + QModelIndexList indexes = match(index(0, column, QModelIndex()), + Qt::DisplayRole, text, -1, flags); + QList<QStandardItem*> items; + for (int i = 0; i < indexes.size(); ++i) + items.append(itemFromIndex(indexes.at(i))); + return items; +} + +/*! + \since 4.2 + + Appends a row containing \a items. If necessary, the column count is + increased to the size of \a items. + + \sa insertRow(), appendColumn() +*/ +void QStandardItemModel::appendRow(const QList<QStandardItem*> &items) +{ + invisibleRootItem()->appendRow(items); +} + +/*! + \since 4.2 + + Appends a column containing \a items. If necessary, the row count is + increased to the size of \a items. + + \sa insertColumn(), appendRow() +*/ +void QStandardItemModel::appendColumn(const QList<QStandardItem*> &items) +{ + invisibleRootItem()->appendColumn(items); +} + +/*! + \since 4.2 + \fn QStandardItemModel::appendRow(QStandardItem *item) + \overload + + When building a list or a tree that has only one column, this function + provides a convenient way to append a single new \a item. +*/ + +/*! + \since 4.2 + + Inserts a row at \a row containing \a items. If necessary, the column + count is increased to the size of \a items. + + \sa takeRow(), appendRow(), insertColumn() +*/ +void QStandardItemModel::insertRow(int row, const QList<QStandardItem*> &items) +{ + invisibleRootItem()->insertRow(row, items); +} + +/*! + \since 4.2 + + \fn void QStandardItemModel::insertRow(int row, QStandardItem *item) + \overload + + Inserts a row at \a row containing \a item. + + When building a list or a tree that has only one column, this function + provides a convenient way to append a single new item. +*/ + +/*! + \since 4.2 + + Inserts a column at \a column containing \a items. If necessary, the row + count is increased to the size of \a items. + + \sa takeColumn(), appendColumn(), insertRow() +*/ +void QStandardItemModel::insertColumn(int column, const QList<QStandardItem*> &items) +{ + invisibleRootItem()->insertColumn(column, items); +} + +/*! + \since 4.2 + + Removes the item at (\a row, \a column) without deleting it. The model + releases ownership of the item. + + \sa item(), takeRow(), takeColumn() +*/ +QStandardItem *QStandardItemModel::takeItem(int row, int column) +{ + Q_D(QStandardItemModel); + return d->root->takeChild(row, column); +} + +/*! + \since 4.2 + + Removes the given \a row without deleting the row items, and returns a + list of pointers to the removed items. The model releases ownership of the + items. For items in the row that have not been set, the corresponding + pointers in the list will be 0. + + \sa takeColumn() +*/ +QList<QStandardItem*> QStandardItemModel::takeRow(int row) +{ + Q_D(QStandardItemModel); + return d->root->takeRow(row); +} + +/*! + \since 4.2 + + Removes the given \a column without deleting the column items, and returns + a list of pointers to the removed items. The model releases ownership of + the items. For items in the column that have not been set, the + corresponding pointers in the list will be 0. + + \sa takeRow() +*/ +QList<QStandardItem*> QStandardItemModel::takeColumn(int column) +{ + Q_D(QStandardItemModel); + return d->root->takeColumn(column); +} + +/*! + \since 4.2 + + Removes the horizontal header item at \a column from the header without + deleting it, and returns a pointer to the item. The model releases + ownership of the item. + + \sa horizontalHeaderItem(), takeVerticalHeaderItem() +*/ +QStandardItem *QStandardItemModel::takeHorizontalHeaderItem(int column) +{ + Q_D(QStandardItemModel); + if ((column < 0) || (column >= columnCount())) + return 0; + QStandardItem *headerItem = d->columnHeaderItems.at(column); + if (headerItem) { + headerItem->d_func()->setParentAndModel(0, 0); + d->columnHeaderItems.replace(column, 0); + } + return headerItem; +} + +/*! + \since 4.2 + + Removes the vertical header item at \a row from the header without + deleting it, and returns a pointer to the item. The model releases + ownership of the item. + + \sa verticalHeaderItem(), takeHorizontalHeaderItem() +*/ +QStandardItem *QStandardItemModel::takeVerticalHeaderItem(int row) +{ + Q_D(QStandardItemModel); + if ((row < 0) || (row >= rowCount())) + return 0; + QStandardItem *headerItem = d->rowHeaderItems.at(row); + if (headerItem) { + headerItem->d_func()->setParentAndModel(0, 0); + d->rowHeaderItems.replace(row, 0); + } + return headerItem; +} + +/*! + \since 4.2 + \property QStandardItemModel::sortRole + \brief the item role that is used to query the model's data when sorting items + + The default value is Qt::DisplayRole. + + \sa sort(), QStandardItem::sortChildren() +*/ +int QStandardItemModel::sortRole() const +{ + Q_D(const QStandardItemModel); + return d->sortRole; +} + +void QStandardItemModel::setSortRole(int role) +{ + Q_D(QStandardItemModel); + d->sortRole = role; +} + +/*! + \reimp +*/ +int QStandardItemModel::columnCount(const QModelIndex &parent) const +{ + Q_D(const QStandardItemModel); + QStandardItem *item = d->itemFromIndex(parent); + return item ? item->columnCount() : 0; +} + +/*! + \reimp +*/ +QVariant QStandardItemModel::data(const QModelIndex &index, int role) const +{ + Q_D(const QStandardItemModel); + QStandardItem *item = d->itemFromIndex(index); + return item ? item->data(role) : QVariant(); +} + +/*! + \reimp +*/ +Qt::ItemFlags QStandardItemModel::flags(const QModelIndex &index) const +{ + Q_D(const QStandardItemModel); + if (!d->indexValid(index)) + return d->root->flags(); + QStandardItem *item = d->itemFromIndex(index); + if (item) + return item->flags(); + return Qt::ItemIsSelectable + |Qt::ItemIsEnabled + |Qt::ItemIsEditable + |Qt::ItemIsDragEnabled + |Qt::ItemIsDropEnabled; +} + +/*! + \reimp +*/ +bool QStandardItemModel::hasChildren(const QModelIndex &parent) const +{ + Q_D(const QStandardItemModel); + QStandardItem *item = d->itemFromIndex(parent); + return item ? item->hasChildren() : false; +} + +/*! + \reimp +*/ +QVariant QStandardItemModel::headerData(int section, Qt::Orientation orientation, int role) const +{ + Q_D(const QStandardItemModel); + if ((section < 0) + || ((orientation == Qt::Horizontal) && (section >= columnCount())) + || ((orientation == Qt::Vertical) && (section >= rowCount()))) { + return QVariant(); + } + QStandardItem *headerItem = 0; + if (orientation == Qt::Horizontal) + headerItem = d->columnHeaderItems.at(section); + else if (orientation == Qt::Vertical) + headerItem = d->rowHeaderItems.at(section); + return headerItem ? headerItem->data(role) + : QAbstractItemModel::headerData(section, orientation, role); +} + +/*! + \reimp + + QStandardItemModel supports both copy and move. +*/ +Qt::DropActions QStandardItemModel::supportedDropActions () const +{ + return Qt::CopyAction | Qt::MoveAction; +} + +/*! + \reimp +*/ +QModelIndex QStandardItemModel::index(int row, int column, const QModelIndex &parent) const +{ + Q_D(const QStandardItemModel); + QStandardItem *parentItem = d->itemFromIndex(parent); + if ((parentItem == 0) + || (row < 0) + || (column < 0) + || (row >= parentItem->rowCount()) + || (column >= parentItem->columnCount())) { + return QModelIndex(); + } + return createIndex(row, column, parentItem); +} + +/*! + \reimp +*/ +bool QStandardItemModel::insertColumns(int column, int count, const QModelIndex &parent) +{ + Q_D(QStandardItemModel); + QStandardItem *item = parent.isValid() ? itemFromIndex(parent) : d->root; + if (item == 0) + return false; + return item->d_func()->insertColumns(column, count, QList<QStandardItem*>()); +} + +/*! + \reimp +*/ +bool QStandardItemModel::insertRows(int row, int count, const QModelIndex &parent) +{ + Q_D(QStandardItemModel); + QStandardItem *item = parent.isValid() ? itemFromIndex(parent) : d->root; + if (item == 0) + return false; + return item->d_func()->insertRows(row, count, QList<QStandardItem*>()); +} + +/*! + \reimp +*/ +QMap<int, QVariant> QStandardItemModel::itemData(const QModelIndex &index) const +{ + Q_D(const QStandardItemModel); + QStandardItem *item = d->itemFromIndex(index); + return item ? item->d_func()->itemData() : QMap<int, QVariant>(); +} + +/*! + \reimp +*/ +QModelIndex QStandardItemModel::parent(const QModelIndex &child) const +{ + Q_D(const QStandardItemModel); + if (!d->indexValid(child)) + return QModelIndex(); + QStandardItem *parentItem = static_cast<QStandardItem*>(child.internalPointer()); + return indexFromItem(parentItem); +} + +/*! + \reimp +*/ +bool QStandardItemModel::removeColumns(int column, int count, const QModelIndex &parent) +{ + Q_D(QStandardItemModel); + QStandardItem *item = d->itemFromIndex(parent); + if ((item == 0) || (count < 1) || (column < 0) || ((column + count) > item->columnCount())) + return false; + item->removeColumns(column, count); + return true; +} + +/*! + \reimp +*/ +bool QStandardItemModel::removeRows(int row, int count, const QModelIndex &parent) +{ + Q_D(QStandardItemModel); + QStandardItem *item = d->itemFromIndex(parent); + if ((item == 0) || (count < 1) || (row < 0) || ((row + count) > item->rowCount())) + return false; + item->removeRows(row, count); + return true; +} + +/*! + \reimp +*/ +int QStandardItemModel::rowCount(const QModelIndex &parent) const +{ + Q_D(const QStandardItemModel); + QStandardItem *item = d->itemFromIndex(parent); + return item ? item->rowCount() : 0; +} + +/*! + \reimp +*/ +bool QStandardItemModel::setData(const QModelIndex &index, const QVariant &value, int role) +{ + if (!index.isValid()) + return false; + QStandardItem *item = itemFromIndex(index); + if (item == 0) + return false; + item->setData(value, role); + return true; +} + +/*! + \reimp +*/ +bool QStandardItemModel::setHeaderData(int section, Qt::Orientation orientation, const QVariant &value, int role) +{ + Q_D(QStandardItemModel); + if ((section < 0) + || ((orientation == Qt::Horizontal) && (section >= columnCount())) + || ((orientation == Qt::Vertical) && (section >= rowCount()))) { + return false; + } + QStandardItem *headerItem = 0; + if (orientation == Qt::Horizontal) { + headerItem = d->columnHeaderItems.at(section); + if (headerItem == 0) { + headerItem = d->createItem(); + headerItem->d_func()->setModel(this); + d->columnHeaderItems.replace(section, headerItem); + } + } else if (orientation == Qt::Vertical) { + headerItem = d->rowHeaderItems.at(section); + if (headerItem == 0) { + headerItem = d->createItem(); + headerItem->d_func()->setModel(this); + d->rowHeaderItems.replace(section, headerItem); + } + } + if (headerItem) { + headerItem->setData(value, role); + return true; + } + return false; +} + +/*! + \reimp +*/ +bool QStandardItemModel::setItemData(const QModelIndex &index, const QMap<int, QVariant> &roles) +{ + QStandardItem *item = itemFromIndex(index); + if (item == 0) + return false; + item->d_func()->setItemData(roles); + return true; +} + +/*! + \reimp +*/ +void QStandardItemModel::sort(int column, Qt::SortOrder order) +{ + Q_D(QStandardItemModel); + d->root->sortChildren(column, order); +} + +/*! + \fn QObject *QStandardItemModel::parent() const + \internal +*/ + + +/*! + \reimp +*/ +QStringList QStandardItemModel::mimeTypes() const +{ + return QAbstractItemModel::mimeTypes() << QLatin1String("application/x-qstandarditemmodeldatalist"); +} + +/*! + \reimp +*/ +QMimeData *QStandardItemModel::mimeData(const QModelIndexList &indexes) const +{ + QMimeData *data = QAbstractItemModel::mimeData(indexes); + if(!data) + return 0; + + QString format = QLatin1String("application/x-qstandarditemmodeldatalist"); + if (!mimeTypes().contains(format)) + return data; + QByteArray encoded; + QDataStream stream(&encoded, QIODevice::WriteOnly); + + QSet<QStandardItem*> itemsSet; + QStack<QStandardItem*> stack; + itemsSet.reserve(indexes.count()); + stack.reserve(indexes.count()); + foreach (const QModelIndex &index, indexes) { + QStandardItem *item = itemFromIndex(index); + itemsSet << item; + stack.push(item); + } + + //remove duplicates childrens + { + QSet<QStandardItem *> seen; + while (!stack.isEmpty()) { + QStandardItem *itm = stack.pop(); + if (seen.contains(itm)) + continue; + seen.insert(itm); + + const QVector<QStandardItem*> &childList = itm->d_func()->children; + for (int i = 0; i < childList.count(); ++i) { + QStandardItem *chi = childList.at(i); + if (chi) { + QSet<QStandardItem *>::iterator it = itemsSet.find(chi); + if (it != itemsSet.end()) { + itemsSet.erase(it); + } + stack.push(chi); + } + } + } + } + + stack.reserve(itemsSet.count()); + foreach (QStandardItem *item, itemsSet) { + stack.push(item); + } + + //stream everything recursively + while (!stack.isEmpty()) { + QStandardItem *item = stack.pop(); + if(itemsSet.contains(item)) { //if the item is selection 'top-level', strem its position + stream << item->row() << item->column(); + } + if(item) { + stream << *item << item->columnCount() << item->d_ptr->children.count(); + stack += item->d_ptr->children; + } else { + QStandardItem dummy; + stream << dummy << 0 << 0; + } + } + + data->setData(format, encoded); + return data; +} + + +/* \internal + Used by QStandardItemModel::dropMimeData + stream out an item and his children + */ +static void decodeDataRecursive(QDataStream &stream, QStandardItem *item) +{ + int colCount, childCount; + stream >> *item; + stream >> colCount >> childCount; + item->setColumnCount(colCount); + + int childPos = childCount; + + while(childPos > 0) { + childPos--; + QStandardItem *child = new QStandardItem; + decodeDataRecursive(stream, child); + item->setChild( childPos / colCount, childPos % colCount, child); + } +} + + +/*! + \reimp +*/ +bool QStandardItemModel::dropMimeData(const QMimeData *data, Qt::DropAction action, + int row, int column, const QModelIndex &parent) +{ + // check if the action is supported + if (!data || !(action == Qt::CopyAction || action == Qt::MoveAction)) + return false; + // check if the format is supported + QString format = QLatin1String("application/x-qstandarditemmodeldatalist"); + if (!data->hasFormat(format)) + return QAbstractItemModel::dropMimeData(data, action, row, column, parent); + + if (row > rowCount(parent)) + row = rowCount(parent); + if (row == -1) + row = rowCount(parent); + if (column == -1) + column = 0; + + // decode and insert + QByteArray encoded = data->data(format); + QDataStream stream(&encoded, QIODevice::ReadOnly); + + + //code based on QAbstractItemModel::decodeData + // adapted to work with QStandardItem + int top = INT_MAX; + int left = INT_MAX; + int bottom = 0; + int right = 0; + QVector<int> rows, columns; + QVector<QStandardItem *> items; + + while (!stream.atEnd()) { + int r, c; + QStandardItem *item = new QStandardItem; + stream >> r >> c; + decodeDataRecursive(stream, item); + + rows.append(r); + columns.append(c); + items.append(item); + top = qMin(r, top); + left = qMin(c, left); + bottom = qMax(r, bottom); + right = qMax(c, right); + } + + // insert the dragged items into the table, use a bit array to avoid overwriting items, + // since items from different tables can have the same row and column + int dragRowCount = 0; + int dragColumnCount = right - left + 1; + + // Compute the number of continuous rows upon insertion and modify the rows to match + QVector<int> rowsToInsert(bottom + 1); + for (int i = 0; i < rows.count(); ++i) + rowsToInsert[rows.at(i)] = 1; + for (int i = 0; i < rowsToInsert.count(); ++i) { + if (rowsToInsert[i] == 1){ + rowsToInsert[i] = dragRowCount; + ++dragRowCount; + } + } + for (int i = 0; i < rows.count(); ++i) + rows[i] = top + rowsToInsert[rows[i]]; + + QBitArray isWrittenTo(dragRowCount * dragColumnCount); + + // make space in the table for the dropped data + int colCount = columnCount(parent); + if (colCount < dragColumnCount + column) { + insertColumns(colCount, dragColumnCount + column - colCount, parent); + colCount = columnCount(parent); + } + insertRows(row, dragRowCount, parent); + + row = qMax(0, row); + column = qMax(0, column); + + QStandardItem *parentItem = itemFromIndex (parent); + if (!parentItem) + parentItem = invisibleRootItem(); + + QVector<QPersistentModelIndex> newIndexes(items.size()); + // set the data in the table + for (int j = 0; j < items.size(); ++j) { + int relativeRow = rows.at(j) - top; + int relativeColumn = columns.at(j) - left; + int destinationRow = relativeRow + row; + int destinationColumn = relativeColumn + column; + int flat = (relativeRow * dragColumnCount) + relativeColumn; + // if the item was already written to, or we just can't fit it in the table, create a new row + if (destinationColumn >= colCount || isWrittenTo.testBit(flat)) { + destinationColumn = qBound(column, destinationColumn, colCount - 1); + destinationRow = row + dragRowCount; + insertRows(row + dragRowCount, 1, parent); + flat = (dragRowCount * dragColumnCount) + relativeColumn; + isWrittenTo.resize(++dragRowCount * dragColumnCount); + } + if (!isWrittenTo.testBit(flat)) { + newIndexes[j] = index(destinationRow, destinationColumn, parentItem->index()); + isWrittenTo.setBit(flat); + } + } + + for(int k = 0; k < newIndexes.size(); k++) { + if (newIndexes.at(k).isValid()) { + parentItem->setChild(newIndexes.at(k).row(), newIndexes.at(k).column(), items.at(k)); + } else { + delete items.at(k); + } + } + + return true; +} + +QT_END_NAMESPACE + +#include "moc_qstandarditemmodel.cpp" + +#endif // QT_NO_STANDARDITEMMODEL |