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/* | ||
* Copyright (C) 2017-2021, Emilien Vallot, Christophe Calmejane and other contributors | ||
* This file is part of Hive. | ||
* Hive is free software: you can redistribute it and/or modify | ||
* it under the terms of the GNU Lesser General Public License as published by | ||
* the Free Software Foundation, either version 3 of the License, or | ||
* (at your option) any later version. | ||
* Hive 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 Lesser General Public License for more details. | ||
* You should have received a copy of the GNU Lesser General Public License | ||
* along with Hive. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#pragma once | ||
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#include <QHeaderView> | ||
#include <QEvent> | ||
#include <QSet> | ||
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namespace qtMate | ||
{ | ||
namespace widgets | ||
{ | ||
// This class is intended to be used on a QHeaderView's viewport, in order to disable sorting on a list of sections. | ||
// It swallows MouseButtonPress and MouseButtonRelease that may happen on these sections to disable the sorting mechanism. | ||
// By default, all sections are disabled, call ::enable() to make a section clickable/sortable. | ||
class HeaderViewSortSectionFilter : public QObject | ||
{ | ||
public: | ||
HeaderViewSortSectionFilter(QHeaderView* headerView, QObject* parent = nullptr) | ||
: QObject{ parent } | ||
, _headerView{ headerView } | ||
{ | ||
_headerView->viewport()->installEventFilter(this); | ||
} | ||
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void disable(int logicalIndex) | ||
{ | ||
_enabledSectionSet.remove(logicalIndex); | ||
} | ||
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void enable(int logicalIndex) | ||
{ | ||
_enabledSectionSet.insert(logicalIndex); | ||
} | ||
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private: | ||
virtual bool eventFilter(QObject* object, QEvent* event) override | ||
{ | ||
if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonRelease) | ||
{ | ||
auto* ev = static_cast<QMouseEvent*>(event); | ||
auto const logicalIndexUnderTheMouse = _headerView->logicalIndexAt(ev->pos()); | ||
if (!_enabledSectionSet.contains(logicalIndexUnderTheMouse)) | ||
{ | ||
return true; | ||
} | ||
} | ||
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return false; | ||
} | ||
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private: | ||
QHeaderView* _headerView{}; | ||
QSet<int> _enabledSectionSet{}; | ||
}; | ||
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} // namespace widgets | ||
} // namespace qtMate |
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