mirror of
https://github.com/crystalidea/qt6windows7.git
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70 lines
2.6 KiB
C++
70 lines
2.6 KiB
C++
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
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#include "mousepangesturerecognizer.h"
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#include <QEvent>
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#include <QVariant>
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#include <QGraphicsSceneMouseEvent>
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#include <QMouseEvent>
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#include <QGesture>
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MousePanGestureRecognizer::MousePanGestureRecognizer()
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{
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}
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QGesture* MousePanGestureRecognizer::create(QObject *)
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{
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return new QPanGesture;
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}
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QGestureRecognizer::Result MousePanGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
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{
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QPanGesture *g = static_cast<QPanGesture *>(state);
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QPoint globalPos;
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switch (event->type()) {
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case QEvent::GraphicsSceneMousePress:
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case QEvent::GraphicsSceneMouseDoubleClick:
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case QEvent::GraphicsSceneMouseMove:
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case QEvent::GraphicsSceneMouseRelease:
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globalPos = static_cast<QGraphicsSceneMouseEvent *>(event)->screenPos();
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break;
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case QEvent::MouseButtonPress:
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case QEvent::MouseMove:
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case QEvent::MouseButtonRelease:
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globalPos = static_cast<QMouseEvent *>(event)->globalPosition().toPoint();
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break;
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default:
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break;
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}
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if (event->type() == QEvent::MouseButtonPress || event->type() == QEvent::MouseButtonDblClick
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|| event->type() == QEvent::GraphicsSceneMousePress || event->type() == QEvent::GraphicsSceneMouseDoubleClick) {
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g->setHotSpot(globalPos);
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g->setProperty("startPos", globalPos);
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g->setProperty("pressed", QVariant::fromValue<bool>(true));
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return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
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} else if (event->type() == QEvent::MouseMove || event->type() == QEvent::GraphicsSceneMouseMove) {
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if (g->property("pressed").toBool()) {
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QPoint offset = globalPos - g->property("startPos").toPoint();
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g->setLastOffset(g->offset());
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g->setOffset(QPointF(offset.x(), offset.y()));
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return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
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}
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return QGestureRecognizer::CancelGesture;
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} else if (event->type() == QEvent::MouseButtonRelease || event->type() == QEvent::GraphicsSceneMouseRelease) {
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return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
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}
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return QGestureRecognizer::Ignore;
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}
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void MousePanGestureRecognizer::reset(QGesture *state)
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{
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QPanGesture *g = static_cast<QPanGesture *>(state);
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g->setLastOffset(QPointF());
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g->setOffset(QPointF());
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g->setAcceleration(0);
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g->setProperty("startPos", QVariant());
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g->setProperty("pressed", QVariant::fromValue<bool>(false));
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QGestureRecognizer::reset(state);
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}
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