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Diffstat (limited to 'src/gui/itemviews/qtreewidgetitemiterator.cpp')
| -rw-r--r-- | src/gui/itemviews/qtreewidgetitemiterator.cpp | 458 |
1 files changed, 0 insertions, 458 deletions
diff --git a/src/gui/itemviews/qtreewidgetitemiterator.cpp b/src/gui/itemviews/qtreewidgetitemiterator.cpp deleted file mode 100644 index fa0115ed27..0000000000 --- a/src/gui/itemviews/qtreewidgetitemiterator.cpp +++ /dev/null @@ -1,458 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** 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 <private/qtreewidgetitemiterator_p.h> -#include "qtreewidget.h" -#include "qtreewidget_p.h" -#include "qwidgetitemdata_p.h" - -#ifndef QT_NO_TREEWIDGET - -QT_BEGIN_NAMESPACE - -/*! - \class QTreeWidgetItemIterator - \ingroup model-view - \brief The QTreeWidgetItemIterator class provides a way to iterate over the - items in a QTreeWidget instance. - - The iterator will walk the items in a pre-order traversal order, thus visiting the - parent node \e before it continues to the child nodes. - - For example, the following code examples each item in a tree, checking the - text in the first column against a user-specified search string: - - \snippet doc/src/snippets/qtreewidgetitemiterator-using/mainwindow.cpp 0 - - It is also possible to filter out certain types of node by passing certain - \l{IteratorFlag}{flags} to the constructor of QTreeWidgetItemIterator. - - \sa QTreeWidget, {Model/View Programming}, QTreeWidgetItem -*/ - -/*! - Constructs an iterator for the same QTreeWidget as \a it. The - current iterator item is set to point on the current item of \a it. -*/ - -QTreeWidgetItemIterator::QTreeWidgetItemIterator(const QTreeWidgetItemIterator &it) - : d_ptr(new QTreeWidgetItemIteratorPrivate(*(it.d_ptr))), - current(it.current), flags(it.flags) -{ - Q_D(QTreeWidgetItemIterator); - Q_ASSERT(d->m_model); - d->m_model->iterators.append(this); -} - -/*! - Constructs an iterator for the given \a widget that uses the specified \a flags - to determine which items are found during iteration. - The iterator is set to point to the first top-level item contained in the widget, - or the next matching item if the top-level item doesn't match the flags. - - \sa QTreeWidgetItemIterator::IteratorFlag -*/ - -QTreeWidgetItemIterator::QTreeWidgetItemIterator(QTreeWidget *widget, IteratorFlags flags) -: current(0), flags(flags) -{ - Q_ASSERT(widget); - QTreeModel *model = qobject_cast<QTreeModel*>(widget->model()); - Q_ASSERT(model); - d_ptr.reset(new QTreeWidgetItemIteratorPrivate(this, model)); - model->iterators.append(this); - if (!model->rootItem->children.isEmpty()) current = model->rootItem->children.first(); - if (current && !matchesFlags(current)) - ++(*this); -} - -/*! - Constructs an iterator for the given \a item that uses the specified \a flags - to determine which items are found during iteration. - The iterator is set to point to \a item, or the next matching item if \a item - doesn't match the flags. - - \sa QTreeWidgetItemIterator::IteratorFlag -*/ - -QTreeWidgetItemIterator::QTreeWidgetItemIterator(QTreeWidgetItem *item, IteratorFlags flags) - : d_ptr(new QTreeWidgetItemIteratorPrivate( - this, qobject_cast<QTreeModel*>(item->view->model()))), - current(item), flags(flags) -{ - Q_D(QTreeWidgetItemIterator); - Q_ASSERT(item); - QTreeModel *model = qobject_cast<QTreeModel*>(item->view->model()); - Q_ASSERT(model); - model->iterators.append(this); - - // Initialize m_currentIndex and m_parentIndex as it would be if we had traversed from - // the beginning. - QTreeWidgetItem *parent = item; - parent = parent->parent(); - QList<QTreeWidgetItem *> children = parent ? parent->children : d->m_model->rootItem->children; - d->m_currentIndex = children.indexOf(item); - - while (parent) { - QTreeWidgetItem *itm = parent; - parent = parent->parent(); - QList<QTreeWidgetItem *> children = parent ? parent->children : d->m_model->rootItem->children; - int index = children.indexOf(itm); - d->m_parentIndex.prepend(index); - } - - if (current && !matchesFlags(current)) - ++(*this); -} - -/*! - Destroys the iterator. -*/ - -QTreeWidgetItemIterator::~QTreeWidgetItemIterator() -{ - d_func()->m_model->iterators.removeAll(this); -} - -/*! - Assignment. Makes a copy of \a it and returns a reference to its - iterator. -*/ - -QTreeWidgetItemIterator &QTreeWidgetItemIterator::operator=(const QTreeWidgetItemIterator &it) -{ - Q_D(QTreeWidgetItemIterator); - if (d_func()->m_model != it.d_func()->m_model) { - d_func()->m_model->iterators.removeAll(this); - it.d_func()->m_model->iterators.append(this); - } - current = it.current; - flags = it.flags; - d->operator=(*it.d_func()); - return *this; -} - -/*! - The prefix ++ operator (++it) advances the iterator to the next matching item - and returns a reference to the resulting iterator. - Sets the current pointer to 0 if the current item is the last matching item. -*/ - -QTreeWidgetItemIterator &QTreeWidgetItemIterator::operator++() -{ - if (current) - do { - current = d_func()->next(current); - } while (current && !matchesFlags(current)); - return *this; -} - -/*! - The prefix -- operator (--it) advances the iterator to the previous matching item - and returns a reference to the resulting iterator. - Sets the current pointer to 0 if the current item is the first matching item. -*/ - -QTreeWidgetItemIterator &QTreeWidgetItemIterator::operator--() -{ - if (current) - do { - current = d_func()->previous(current); - } while (current && !matchesFlags(current)); - return *this; -} - -/*! - \internal -*/ -bool QTreeWidgetItemIterator::matchesFlags(const QTreeWidgetItem *item) const -{ - if (!item) - return false; - - if (flags == All) - return true; - - { - Qt::ItemFlags itemFlags = item->flags(); - if ((flags & Selectable) && !(itemFlags & Qt::ItemIsSelectable)) - return false; - if ((flags & NotSelectable) && (itemFlags & Qt::ItemIsSelectable)) - return false; - if ((flags & DragEnabled) && !(itemFlags & Qt::ItemIsDragEnabled)) - return false; - if ((flags & DragDisabled) && (itemFlags & Qt::ItemIsDragEnabled)) - return false; - if ((flags & DropEnabled) && !(itemFlags & Qt::ItemIsDropEnabled)) - return false; - if ((flags & DropDisabled) && (itemFlags & Qt::ItemIsDropEnabled)) - return false; - if ((flags & Enabled) && !(itemFlags & Qt::ItemIsEnabled)) - return false; - if ((flags & Disabled) && (itemFlags & Qt::ItemIsEnabled)) - return false; - if ((flags & Editable) && !(itemFlags & Qt::ItemIsEditable)) - return false; - if ((flags & NotEditable) && (itemFlags & Qt::ItemIsEditable)) - return false; - } - - if (flags & (Checked|NotChecked)) { - // ### We only test the check state for column 0 - Qt::CheckState check = item->checkState(0); - // PartiallyChecked matches as Checked. - if ((flags & Checked) && (check == Qt::Unchecked)) - return false; - if ((flags & NotChecked) && (check != Qt::Unchecked)) - return false; - } - - if ((flags & HasChildren) && !item->childCount()) - return false; - if ((flags & NoChildren) && item->childCount()) - return false; - - if ((flags & Hidden) && !item->isHidden()) - return false; - if ((flags & NotHidden) && item->isHidden()) - return false; - - if ((flags & Selected) && !item->isSelected()) - return false; - if ((flags & Unselected) && item->isSelected()) - return false; - - return true; -} - -/* - * Implementation of QTreeWidgetItemIteratorPrivate - */ -QTreeWidgetItem* QTreeWidgetItemIteratorPrivate::nextSibling(const QTreeWidgetItem* item) const -{ - Q_ASSERT(item); - QTreeWidgetItem *next = 0; - if (QTreeWidgetItem *par = item->parent()) { - int i = par->indexOfChild(const_cast<QTreeWidgetItem*>(item)); - next = par->child(i + 1); - } else { - QTreeWidget *tw = item->treeWidget(); - int i = tw->indexOfTopLevelItem(const_cast<QTreeWidgetItem*>(item)); - next = tw->topLevelItem(i + 1); - } - return next; -} - -QTreeWidgetItem *QTreeWidgetItemIteratorPrivate::next(const QTreeWidgetItem *current) -{ - if (!current) return 0; - - QTreeWidgetItem *next = 0; - if (current->childCount()) { - // walk the child - m_parentIndex.push(m_currentIndex); - m_currentIndex = 0; - next = current->child(0); - } else { - // walk the sibling - QTreeWidgetItem *parent = current->parent(); - next = parent ? parent->child(m_currentIndex + 1) - : m_model->rootItem->child(m_currentIndex + 1); - while (!next && parent) { - // if we had no sibling walk up the parent and try the sibling of that - parent = parent->parent(); - m_currentIndex = m_parentIndex.pop(); - next = parent ? parent->child(m_currentIndex + 1) - : m_model->rootItem->child(m_currentIndex + 1); - } - if (next) ++(m_currentIndex); - } - return next; -} - -QTreeWidgetItem *QTreeWidgetItemIteratorPrivate::previous(const QTreeWidgetItem *current) -{ - if (!current) return 0; - - QTreeWidgetItem *prev = 0; - // walk the previous sibling - QTreeWidgetItem *parent = current->parent(); - prev = parent ? parent->child(m_currentIndex - 1) - : m_model->rootItem->child(m_currentIndex - 1); - if (prev) { - // Yes, we had a previous sibling but we need go down to the last leafnode. - --m_currentIndex; - while (prev && prev->childCount()) { - m_parentIndex.push(m_currentIndex); - m_currentIndex = prev->childCount() - 1; - prev = prev->child(m_currentIndex); - } - } else if (parent) { - m_currentIndex = m_parentIndex.pop(); - prev = parent; - } - return prev; -} - -void QTreeWidgetItemIteratorPrivate::ensureValidIterator(const QTreeWidgetItem *itemToBeRemoved) -{ - Q_Q(QTreeWidgetItemIterator); - Q_ASSERT(itemToBeRemoved); - - if (!q->current) return; - QTreeWidgetItem *nextItem = q->current; - - // Do not walk to the ancestor to find the other item if they have the same parent. - if (nextItem->parent() != itemToBeRemoved->parent()) { - while (nextItem->parent() && nextItem != itemToBeRemoved) { - nextItem = nextItem->parent(); - } - } - // If the item to be removed is an ancestor of the current iterator item, - // we need to adjust the iterator. - if (nextItem == itemToBeRemoved) { - QTreeWidgetItem *parent = nextItem; - nextItem = 0; - while (parent && !nextItem) { - nextItem = nextSibling(parent); - parent = parent->parent(); - } - if (nextItem) { - // Ooooh... Set the iterator to the next valid item - *q = QTreeWidgetItemIterator(nextItem, q->flags); - if (!(q->matchesFlags(nextItem))) ++(*q); - } else { - // set it to null. - q->current = 0; - m_parentIndex.clear(); - return; - } - } - if (nextItem->parent() == itemToBeRemoved->parent()) { - // They have the same parent, i.e. we have to adjust the m_currentIndex member of the iterator - // if the deleted item is to the left of the nextItem. - - QTreeWidgetItem *par = itemToBeRemoved->parent(); // We know they both have the same parent. - QTreeWidget *tw = itemToBeRemoved->treeWidget(); // ..and widget - int indexOfItemToBeRemoved = par ? par->indexOfChild(const_cast<QTreeWidgetItem *>(itemToBeRemoved)) - : tw->indexOfTopLevelItem(const_cast<QTreeWidgetItem *>(itemToBeRemoved)); - int indexOfNextItem = par ? par->indexOfChild(nextItem) : tw->indexOfTopLevelItem(nextItem); - - if (indexOfItemToBeRemoved <= indexOfNextItem) { - // A sibling to the left of us was deleted, adjust the m_currentIndex member of the iterator. - // Note that the m_currentIndex will be wrong until the item is actually removed! - m_currentIndex--; - } - } -} - -/*! - \fn const QTreeWidgetItemIterator QTreeWidgetItemIterator::operator++(int) - - The postfix ++ operator (it++) advances the iterator to the next matching item - and returns an iterator to the previously current item. -*/ - -/*! - \fn QTreeWidgetItemIterator &QTreeWidgetItemIterator::operator+=(int n) - - Makes the iterator go forward by \a n matching items. (If n is negative, the - iterator goes backward.) - - If the current item is beyond the last item, the current item pointer is - set to 0. Returns the resulting iterator. -*/ - -/*! - \fn const QTreeWidgetItemIterator QTreeWidgetItemIterator::operator--(int) - - The postfix -- operator (it--) makes the preceding matching item current and returns an iterator to the previously current item. -*/ - -/*! - \fn QTreeWidgetItemIterator &QTreeWidgetItemIterator::operator-=(int n) - - Makes the iterator go backward by \a n matching items. (If n is negative, the - iterator goes forward.) - - If the current item is ahead of the last item, the current item pointer is - set to 0. Returns the resulting iterator. -*/ - -/*! - \fn QTreeWidgetItem *QTreeWidgetItemIterator::operator*() const - - Dereference operator. Returns a pointer to the current item. -*/ - - -/*! - \enum QTreeWidgetItemIterator::IteratorFlag - - These flags can be passed to a QTreeWidgetItemIterator constructor - (OR-ed together if more than one is used), so that the iterator - will only iterate over items that match the given flags. - - \value All - \value Hidden - \value NotHidden - \value Selected - \value Unselected - \value Selectable - \value NotSelectable - \value DragEnabled - \value DragDisabled - \value DropEnabled - \value DropDisabled - \value HasChildren - \value NoChildren - \value Checked - \value NotChecked - \value Enabled - \value Disabled - \value Editable - \value NotEditable - \value UserFlag -*/ - -QT_END_NAMESPACE - -#endif // QT_NO_TREEWIDGET |