Qt 5.9 | Qt Widgets | Editable Tree Model Example | treeitem.cpp Example File

Qt 5.9.9 Reference Documentation

# treeitem.cpp Example File

itemviews/editabletreemodel/treeitem.cpp

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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;
      }