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37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
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// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "diagramscene.h"
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#include "diagramitem.h"
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#include <QGraphicsSceneMouseEvent>
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DiagramScene::DiagramScene(QObject *parent)
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: QGraphicsScene(parent)
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{}
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void DiagramScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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QPointF mousePos(event->buttonDownScenePos(Qt::LeftButton).x(),
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event->buttonDownScenePos(Qt::LeftButton).y());
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const QList<QGraphicsItem *> itemList = items(mousePos);
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movingItem = itemList.isEmpty() ? nullptr : itemList.first();
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if (movingItem != nullptr && event->button() == Qt::LeftButton)
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oldPos = movingItem->pos();
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clearSelection();
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QGraphicsScene::mousePressEvent(event);
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}
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void DiagramScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
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{
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if (movingItem != nullptr && event->button() == Qt::LeftButton) {
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if (oldPos != movingItem->pos())
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emit itemMoved(qgraphicsitem_cast<DiagramItem *>(movingItem),
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oldPos);
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movingItem = nullptr;
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}
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QGraphicsScene::mouseReleaseEvent(event);
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}
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