Qt Reference Documentation

treeitem.cpp Example File

itemviews/editabletreemodel/treeitem.cpp
 /****************************************************************************
 **
 ** Copyright (C) 2015 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** You may use this file under the terms of the BSD license as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 /*
     treeitem.cpp

     A container for items of data supplied by the simple tree model.
 */

 #include <QStringList>

 #include "treeitem.h"

 TreeItem::TreeItem(const QVector<QVariant> &data, TreeItem *parent)
 {
     parentItem = parent;
     itemData = data;
 }

 TreeItem::~TreeItem()
 {
     qDeleteAll(childItems);
 }

 TreeItem *TreeItem::child(int number)
 {
     return childItems.value(number);
 }

 int TreeItem::childCount() const
 {
     return childItems.count();
 }

 int TreeItem::childNumber() const
 {
     if (parentItem)
         return parentItem->childItems.indexOf(const_cast<TreeItem*>(this));

     return 0;
 }

 int TreeItem::columnCount() const
 {
     return itemData.count();
 }

 QVariant TreeItem::data(int column) const
 {
     return itemData.value(column);
 }

 bool TreeItem::insertChildren(int position, int count, int columns)
 {
     if (position < 0 || position > childItems.size())
         return false;

     for (int row = 0; row < count; ++row) {
         QVector<QVariant> data(columns);
         TreeItem *item = new TreeItem(data, this);
         childItems.insert(position, item);
     }

     return true;
 }

 bool TreeItem::insertColumns(int position, int columns)
 {
     if (position < 0 || position > itemData.size())
         return false;

     for (int column = 0; column < columns; ++column)
         itemData.insert(position, QVariant());

     foreach (TreeItem *child, childItems)
         child->insertColumns(position, columns);

     return true;
 }

 TreeItem *TreeItem::parent()
 {
     return parentItem;
 }

 bool TreeItem::removeChildren(int position, int count)
 {
     if (position < 0 || position + count > childItems.size())
         return false;

     for (int row = 0; row < count; ++row)
         delete childItems.takeAt(position);

     return true;
 }

 bool TreeItem::removeColumns(int position, int columns)
 {
     if (position < 0 || position + columns > itemData.size())
         return false;

     for (int column = 0; column < columns; ++column)
         itemData.remove(position);

     foreach (TreeItem *child, childItems)
         child->removeColumns(position, columns);

     return true;
 }

 bool TreeItem::setData(int column, const QVariant &value)
 {
     if (column < 0 || column >= itemData.size())
         return false;

     itemData[column] = value;
     return true;
 }