TYTreeStateHelper.h

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/*
 * Copyright (C) <2012-2024> <EDF-DTG> <FRANCE>
 * This file is part of Code_TYMPAN (R).
 * Code_TYMPAN (R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * Code_TYMPAN (R) is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License along
 * with Code_TYMPAN (R). If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef __TY_TREE_STATE_HELPER__
#define __TY_TREE_STATE_HELPER__
 
#include <QHash>
#include <QString>
#include <QTreeWidget>
#include <QTreeWidgetItem>
 
struct TYTreeViewState
{
    QHash<QString, bool> expansion; // clé → expanded ?
    int vScroll = 0;                // position verticale
    int hScroll = 0;                // position horizontale
};
 
class TYTreeStateHelper
{
public:
    static void capture(QTreeWidget* tree, TYTreeViewState& outState);
 
    static void apply(QTreeWidget* tree, const TYTreeViewState& state);
 
private:
    // Routines récursives pour l'expansion
    static void saveExpansionRec(QTreeWidgetItem* item, QHash<QString, bool>& map);
    static void restoreExpansionRec(QTreeWidgetItem* item, const QHash<QString, bool>& map);
 
    // Génère une clé stable pour un item (ID UserRole si dispo, sinon chemin textuel)
    static QString makeKey(QTreeWidgetItem* item);
};
 
#endif //__TY_TREE_STATE_HELPER__