--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/itemviews/qstandarditemmodel.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,3115 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@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 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.data())
+ rowHeaderItems.insert(row, count, 0);
+ q->endInsertRows();
+}
+
+/*!
+ \internal
+*/
+void QStandardItemModelPrivate::columnsInserted(QStandardItem *parent,
+ int column, int count)
+{
+ Q_Q(QStandardItemModel);
+ if (parent == root.data())
+ columnHeaderItems.insert(column, count, 0);
+ q->endInsertColumns();
+}
+
+/*!
+ \internal
+*/
+void QStandardItemModelPrivate::rowsRemoved(QStandardItem *parent,
+ int row, int count)
+{
+ Q_Q(QStandardItemModel);
+ if (parent == root.data()) {
+ 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.data()) {
+ 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()
+{
+}
+
+/*!
+ 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.data() != 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*>();
+ if (d->model)
+ d->model->d_func()->rowsAboutToBeRemoved(this, row, row);
+ QList<QStandardItem*> items;
+ int index = d->childIndex(row, 0); // Will return -1 if there are no columns
+ if (index != -1) {
+ int col_count = d->columnCount();
+ for (int column = 0; column < col_count; ++column) {
+ QStandardItem *ch = d->children.at(index + column);
+ if (ch)
+ ch->d_func()->setParentAndModel(0, 0);
+ items.append(ch);
+ }
+ d->children.remove(index, col_count);
+ }
+ d->rows--;
+ if (d->model)
+ d->model->d_func()->rowsRemoved(this, row, 1);
+ 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*>();
+ if (d->model)
+ d->model->d_func()->columnsAboutToBeRemoved(this, column, column);
+ QList<QStandardItem*> items;
+
+ for (int row = d->rowCount() - 1; row >= 0; --row) {
+ int index = d->childIndex(row, column);
+ QStandardItem *ch = d->children.at(index);
+ if (ch)
+ ch->d_func()->setParentAndModel(0, 0);
+ d->children.remove(index);
+ items.prepend(ch);
+ }
+ d->columns--;
+ if (d->model)
+ d->model->d_func()->columnsRemoved(this, column, 1);
+ 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.userType()) {
+ 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 QMetaType::Float:
+ return l.toFloat() < r.toFloat();
+ 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);
+ d->root.reset(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.data();
+}
+
+/*!
+ \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.data();
+ 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.data();
+ 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());
+ for (int i = 0; i < indexes.count(); ++i) {
+ QStandardItem *item = itemFromIndex(indexes.at(i));
+ 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
+ */
+void QStandardItemModelPrivate::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 = createItem();
+ 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)
+{
+ Q_D(QStandardItemModel);
+ // 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 = d->createItem();
+ stream >> r >> c;
+ d->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