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/* tree_model_helpers.h
*
* Utility template classes for basic tree model functionality
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef TREE_MODEL_HELPERS_H
#define TREE_MODEL_HELPERS_H
#include <config.h>
#include <ui/qt/utils/variant_pointer.h>
#include <QAbstractItemModel>
//Base class to inherit basic tree item from
template <typename Item>
class ModelHelperTreeItem
{
public:
ModelHelperTreeItem(Item* parent)
: parent_(parent)
{
}
virtual ~ModelHelperTreeItem()
{
for (int row = 0; row < childItems_.count(); row++)
{
delete VariantPointer<Item>::asPtr(childItems_.value(row));
}
childItems_.clear();
}
void appendChild(Item* child)
{
childItems_.prepend(VariantPointer<Item>::asQVariant(child));
}
Item* child(int row)
{
return VariantPointer<Item>::asPtr(childItems_.value(row));
}
int childCount() const
{
return childItems_.count();
}
int row() const
{
if (parent_)
return parent_->childItems_.indexOf(VariantPointer<Item>::asQVariant((Item*)this));
return 0;
}
Item* parentItem() {return parent_; }
protected:
Item* parent_;
QList<QVariant> childItems_;
};
//XXX - Qt 4.8 doesn't work with these types of templated classes, so save the functionality for now.
#ifdef WIRESHARK_SUPPORTS_QT_5_0_MINIMUM
//Base class to inherit basic model for tree
template <typename Item>
class ModelHelperTreeModel : public QAbstractItemModel
{
public:
explicit ModelHelperTreeModel(QObject * parent = Q_NULLPTR) : QAbstractItemModel(parent),
root_(NULL)
{
}
virtual ~ModelHelperTreeModel()
{
delete root_;
}
virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const
{
if (!hasIndex(row, column, parent))
return QModelIndex();
Item *parent_item, *child_item;
if (!parent.isValid())
parent_item = root_;
else
parent_item = static_cast<Item*>(parent.internalPointer());
Q_ASSERT(parent_item);
child_item = parent_item->child(row);
if (child_item) {
return createIndex(row, column, child_item);
}
return QModelIndex();
}
virtual QModelIndex parent(const QModelIndex& indexItem) const
{
if (!indexItem.isValid())
return QModelIndex();
Item* item = static_cast<Item*>(indexItem.internalPointer());
if (item != NULL) {
Item* parent_item = item->parentItem();
if (parent_item != NULL) {
if (parent_item == root_)
return QModelIndex();
return createIndex(parent_item->row(), 0, parent_item);
}
}
return QModelIndex();
}
virtual int rowCount(const QModelIndex& parent = QModelIndex()) const
{
Item *parent_item;
if (parent.column() > 0)
return 0;
if (!parent.isValid())
parent_item = root_;
else
parent_item = static_cast<Item*>(parent.internalPointer());
if (parent_item == NULL)
return 0;
return parent_item->childCount();
}
protected:
Item* root_;
};
#endif
#endif // TREE_MODEL_HELPERS_H
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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