qt 6.5.1 original

tests/manual/gestures/scrollarea/mousepangesturerecognizer.cpp

@@ -0,0 +1,61 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "mousepangesturerecognizer.h"
+
+#include <QEvent>
+#include <QMouseEvent>
+#include <QGesture>
+
+MousePanGestureRecognizer::MousePanGestureRecognizer()
+{
+}
+
+QGesture *MousePanGestureRecognizer::create(QObject *)
+{
+    return new QPanGesture;
+}
+
+QGestureRecognizer::Result MousePanGestureRecognizer::recognize(QGesture *state, QObject *, QEvent *event)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    if (event->type() == QEvent::TouchBegin) {
+        // ignore the following mousepress event
+        g->setProperty("ignoreMousePress", QVariant::fromValue<bool>(true));
+    } else if (event->type() == QEvent::TouchEnd) {
+        g->setProperty("ignoreMousePress", QVariant::fromValue<bool>(false));
+    }
+    QMouseEvent *me = static_cast<QMouseEvent *>(event);
+    if (event->type() == QEvent::MouseButtonPress) {
+        if (g->property("ignoreMousePress").toBool())
+            return QGestureRecognizer::Ignore;
+        g->setHotSpot(me->globalPos());
+        g->setProperty("startPos", me->globalPos());
+        g->setProperty("pressed", QVariant::fromValue<bool>(true));
+        return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+    } else if (event->type() == QEvent::MouseMove) {
+        if (g->property("pressed").toBool()) {
+            QPoint offset = me->globalPos() - g->property("startPos").toPoint();
+            g->setLastOffset(g->offset());
+            g->setOffset(QPointF(offset.x(), offset.y()));
+            return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
+        }
+        return QGestureRecognizer::CancelGesture;
+    } else if (event->type() == QEvent::MouseButtonRelease) {
+        if (g->property("pressed").toBool())
+            return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
+    }
+    return QGestureRecognizer::Ignore;
+}
+
+void MousePanGestureRecognizer::reset(QGesture *state)
+{
+    QPanGesture *g = static_cast<QPanGesture *>(state);
+    g->setLastOffset(QPointF());
+    g->setOffset(QPointF());
+    g->setAcceleration(0);
+    g->setProperty("startPos", QVariant());
+    g->setProperty("pressed", QVariant::fromValue<bool>(false));
+    g->setProperty("ignoreMousePress", QVariant::fromValue<bool>(false));
+    QGestureRecognizer::reset(state);
+}