61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/*
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* Squawk messenger.
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* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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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 as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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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 <http://www.gnu.org/licenses/>.
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*/
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#include "expandinglist.h"
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#include <QApplication>
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ExpandingList::ExpandingList(QWidget* parent) :
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QListView(parent),
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scrollBarExtent(qApp->style()->pixelMetric(QStyle::PM_ScrollBarExtent))
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{
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setVerticalScrollBarPolicy(Qt::ScrollBarPolicy::ScrollBarAlwaysOff);
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}
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bool ExpandingList::hasHeightForWidth() const {
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#if (QT_VERSION < QT_VERSION_CHECK(6, 2, 0))
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return
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QAbstractItemView::sizeAdjustPolicy() == QAbstractScrollArea::AdjustToContents &&
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scrollBarExtent > 0;
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#else
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return false;
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#endif
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}
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int ExpandingList::heightForWidth(int width) const {
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QAbstractItemModel* md = model();
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if (md == nullptr)
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return 0;
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if (md->rowCount() == 0)
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return 0;
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const int rowCount = md->rowCount();
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int height = 0;
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for (int i = 0; i < rowCount; i++)
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height += QListView::sizeHintForRow(i);
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height += frameWidth();
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int minWidth = sizeHintForColumn(0) + frameWidth() + 1;
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if (width <= minWidth)
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height += scrollBarExtent + 1;
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return height;
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}
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