qt6 client makefile using chartview example

1 files changed, 72 insertions, 0 deletions

diff --git a/client/chart.cpp b/client/chart.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the Qt Charts module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "chart.h"
+#include <QtWidgets/QGesture>
+#include <QtWidgets/QGraphicsScene>
+#include <QtWidgets/QGraphicsView>
+
+Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
+{
+    // Seems that QGraphicsView (QChartView) does not grab gestures.
+    // They can only be grabbed here in the QGraphicsWidget (QChart).
+    grabGesture(Qt::PanGesture);
+    grabGesture(Qt::PinchGesture);
+}
+
+Chart::~Chart()
+{
+
+}
+
+//![1]
+bool Chart::sceneEvent(QEvent *event)
+{
+    if (event->type() == QEvent::Gesture)
+        return gestureEvent(static_cast<QGestureEvent *>(event));
+    return QChart::event(event);
+}
+
+bool Chart::gestureEvent(QGestureEvent *event)
+{
+    if (QGesture *gesture = event->gesture(Qt::PanGesture)) {
+        QPanGesture *pan = static_cast<QPanGesture *>(gesture);
+        QChart::scroll(-(pan->delta().x()), pan->delta().y());
+    }
+
+    if (QGesture *gesture = event->gesture(Qt::PinchGesture)) {
+        QPinchGesture *pinch = static_cast<QPinchGesture *>(gesture);
+        if (pinch->changeFlags() & QPinchGesture::ScaleFactorChanged)
+            QChart::zoom(pinch->scaleFactor());
+    }
+
+    return true;
+}
+//![1]