treeitem.cpp Example File

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  /*
      treeitem.cpp

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

  #include "treeitem.h"

  #include <QStringList>

  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;
  }