treeitem.cpp Example File

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 /*
     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;
 }