91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
/*
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* SPDX-License-Identifier: GPL-3.0-only
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* MuseScore-CLA-applies
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*
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* MuseScore
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* Music Composition & Notation
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*
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* Copyright (C) 2021 MuseScore BVBA and others
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "itemmultiselectionmodel.h"
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#include <QApplication>
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using namespace mu::uicomponents;
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ItemMultiSelectionModel::ItemMultiSelectionModel(QAbstractItemModel* parent)
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: QItemSelectionModel(parent)
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{
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setSingleItemSelectionMode(false);
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}
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void ItemMultiSelectionModel::setAllowedModifiers(Qt::KeyboardModifiers modifiers)
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{
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m_allowedModifiers = modifiers;
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}
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void ItemMultiSelectionModel::setSingleItemSelectionMode(bool on)
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{
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if (on) {
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m_allowedModifiers = {};
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} else {
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m_allowedModifiers = (Qt::ShiftModifier | Qt::ControlModifier);
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}
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}
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QList<int> ItemMultiSelectionModel::selectedRows() const
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{
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QList<int> rows;
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for (const QModelIndex& index : selectedIndexes()) {
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rows << index.row();
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}
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return rows;
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}
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void ItemMultiSelectionModel::select(const QModelIndex& index)
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{
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Qt::KeyboardModifiers modifiers = QApplication::keyboardModifiers();
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bool modifiersAllowed = m_allowedModifiers & modifiers;
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QModelIndex startIndex = index;
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if (modifiers == Qt::ShiftModifier && hasSelection() && modifiersAllowed) {
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startIndex = selectedIndexes().last();
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} else if (modifiers == Qt::ControlModifier && isSelected(index) && modifiersAllowed) {
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QItemSelectionModel::select(index, SelectionFlag::Deselect);
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return;
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}
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QSet<QModelIndex> uniqueIndexes;
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bool needClearSelection = !modifiersAllowed;
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if (needClearSelection) {
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uniqueIndexes << index;
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} else {
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QItemSelection selection = this->selection();
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selection.select(startIndex, index);
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QModelIndexList indexes = selection.indexes();
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uniqueIndexes = QSet<QModelIndex>(indexes.begin(), indexes.end());
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}
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QItemSelection newSelection;
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for (const QModelIndex& selectedIndex : uniqueIndexes) {
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newSelection.select(selectedIndex, selectedIndex);
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}
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QItemSelectionModel::select(newSelection, SelectionFlag::ClearAndSelect);
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}
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