67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*
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Gwenview: an image viewer
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Copyright 2019 Steffen Hartleib <steffenhartleib@t-online.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "touch_helper.h"
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// Qt
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#include "gwenview_lib_debug.h"
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#include <QEvent>
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#include <QGraphicsWidget>
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#include <QPoint>
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#include <QTouchEvent>
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namespace Gwenview
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{
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namespace Touch_Helper
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{
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QPoint simpleTapPosition(QEvent *event)
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{
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if (event->type() == QEvent::TouchEnd) {
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event->accept();
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if (touchStationary(event)) {
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return simpleTouchPosition(event);
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}
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}
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return QPoint(-1, -1);
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}
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QPoint simpleTouchPosition(QEvent *event, int at)
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{
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if (auto touchEvent = static_cast<QTouchEvent *>(event)) {
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if (touchEvent->touchPoints().size() > at) {
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return touchEvent->touchPoints().at(at).pos().toPoint();
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}
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}
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return QPoint(-1, -1);
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}
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bool touchStationary(QEvent *event)
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{
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if (auto touchEvent = static_cast<QTouchEvent *>(event)) {
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const QPointF distance = touchEvent->touchPoints().first().startPos() - touchEvent->touchPoints().first().pos();
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if (distance.manhattanLength() <= Touch::wiggleRoomForTap) {
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return true;
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}
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}
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return false;
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}
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} // namespace
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} // namespace
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