1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 Jochen Becher 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of Qt Creator. 7 ** 8 ** Commercial License Usage 9 ** Licensees holding valid commercial Qt licenses may use this file in 10 ** accordance with the commercial license agreement provided with the 11 ** Software or, alternatively, in accordance with the terms contained in 12 ** a written agreement between you and The Qt Company. For licensing terms 13 ** and conditions see https://www.qt.io/terms-conditions. For further 14 ** information use the contact form at https://www.qt.io/contact-us. 15 ** 16 ** GNU General Public License Usage 17 ** Alternatively, this file may be used under the terms of the GNU 18 ** General Public License version 3 as published by the Free Software 19 ** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT 20 ** included in the packaging of this file. Please review the following 21 ** information to ensure the GNU General Public License requirements will 22 ** be met: https://www.gnu.org/licenses/gpl-3.0.html. 23 ** 24 ****************************************************************************/ 25 26 #pragma once 27 28 #include <QGraphicsRectItem> 29 30 #include "arrowitem.h" 31 32 #include <QHash> 33 34 namespace qmt { 35 36 class DiagramSceneModel; 37 class IRelationable; 38 39 class RelationStarter : public QGraphicsRectItem 40 { 41 public: 42 RelationStarter(IRelationable *owner, DiagramSceneModel *diagramSceneModel, 43 QGraphicsItem *parent = nullptr); 44 ~RelationStarter() override; 45 46 QRectF boundingRect() const override; 47 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, 48 QWidget *widget = nullptr) override; 49 50 void addArrow(const QString &id, ArrowItem::Shaft shaft, ArrowItem::Head startHead, 51 ArrowItem::Head endHead, 52 const QString &toolTip = QString()); 53 54 protected: 55 void mousePressEvent(QGraphicsSceneMouseEvent *event) override; 56 void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override; 57 void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override; 58 void keyPressEvent(QKeyEvent *event) override; 59 void focusOutEvent(QFocusEvent *event) override; 60 61 private: 62 void updateCurrentPreviewArrow(const QPointF &headPoint); 63 64 IRelationable *m_owner = nullptr; 65 DiagramSceneModel *m_diagramSceneModel = nullptr; 66 QList<ArrowItem *> m_arrows; 67 QHash<ArrowItem *, QString> m_arrowIds; 68 ArrowItem *m_currentPreviewArrow = nullptr; 69 QString m_currentPreviewArrowId; 70 QList<QPointF> m_currentPreviewArrowIntermediatePoints; 71 }; 72 73 } // namespace qmt 74