CustomProxyModel.h

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/*-
 * Copyright (c) 2022-23 Simon Peter <probono@puredarwin.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
 
#ifndef CUSTOMPROXYMODEL_H
#define CUSTOMPROXYMODEL_H
 
#include <QSortFilterProxyModel>
#include <QModelIndex>
#include <QSet>
#include <QFileSystemWatcher>
 
class CustomProxyModel : public QSortFilterProxyModel
{
Q_OBJECT
 
public:
    CustomProxyModel(QObject *parent = nullptr);
 
    bool lessThan(const QModelIndex &left, const QModelIndex &right) const override;
 
    void setFilteringEnabled(bool enable);
 
    void setSourceModel(QAbstractItemModel *sourceModel) override;
 
    // This gets called when a file is dropped onto the view
    bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override;
 
    //  These functions are used to set the supported drag and drop actions for the model.
    Qt::DropActions supportedDropActions() const override;
    Qt::DropActions supportedDragActions() const override;
    Qt::ItemFlags flags(const QModelIndex &index) const override;
    bool canDropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const override;
    bool isFilteringEnabled() const;
 
protected:
    bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const override;
 
private slots:
    void handleHiddenFileChanged(const QString &path);
 
private:
    void loadHiddenFileNames(const QString &hiddenFilePath);
    void updateFiltering();
 
    bool filteringEnabled;
 
    QSet<QString> hiddenFileNames;
 
    QFileSystemWatcher fileWatcher;
 
};
 
#endif // CUSTOMPROXYMODEL_H