| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 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. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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. |
| ** |
| ** 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. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #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 precedence 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 {Serializing Qt Data Types} |
| */ |
| 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 {Serializing Qt Data Types} |
| */ |
| 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 |