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 <QGraphicsItem> 29 30 QT_BEGIN_NAMESPACE 31 class QGraphicsPathItem; 32 class QPainterPath; 33 QT_END_NAMESPACE 34 35 namespace qmt { 36 37 class Style; 38 39 class ArrowItem : public QGraphicsItem 40 { 41 class GraphicsHeadItem; 42 class GraphicsShaftItem; 43 44 public: 45 enum Shaft { 46 ShaftSolid, 47 ShaftDashed, 48 ShaftDot, 49 ShaftDashDot, 50 ShaftDashDotDot 51 }; 52 53 enum Head { 54 HeadNone, 55 HeadCustom, 56 HeadOpen, 57 HeadTriangle, 58 HeadFilledTriangle, 59 HeadDiamond, 60 HeadFilledDiamond, 61 HeadDiamondFilledTriangle, 62 HeadFilledDiamondFilledTriangle 63 }; 64 65 explicit ArrowItem(QGraphicsItem *parent = nullptr); 66 explicit ArrowItem(const ArrowItem &rhs, QGraphicsItem *parent = nullptr); 67 ~ArrowItem() override; 68 69 void setShaft(Shaft shaft); 70 void setArrowSize(double arrowSize); 71 void setDiamondSize(double diamondSize); 72 void setStartHead(Head head); 73 void setStartHead(QGraphicsItem *startHeadItem); 74 void setEndHead(Head head); 75 void setEndHead(QGraphicsItem *endHeadItem); 76 void setPoints(const QList<QPointF> &points); 77 78 QRectF boundingRect() const override; 79 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override; 80 QPainterPath shape() const override; 81 82 QPointF calcPointAtPercent(double percentage) const; 83 QLineF firstLineSegment() const; 84 QLineF lastLineSegment() const; 85 double startHeadLength() const; 86 double endHeadLength() const; 87 88 void update(const Style *style); 89 90 private: 91 void updateShaft(const Style *style); 92 void deleteHead(QGraphicsItem **headItem); 93 void updateHead(QGraphicsItem **headItem, Head head, const Style *style); 94 void updateHeadGeometry(QGraphicsItem *headItem, const QPointF &pos, 95 const QPointF &otherPos); 96 void updateGeometry(); 97 double calcHeadLength(QGraphicsItem *headItem) const; 98 99 Shaft m_shaft = ShaftSolid; 100 GraphicsShaftItem *m_shaftItem = nullptr; 101 double m_arrowSize = 10.0; 102 double m_diamondSize = 15.0; 103 Head m_startHead = HeadNone; 104 QGraphicsItem *m_startHeadItem = nullptr; 105 Head m_endHead = HeadNone; 106 QGraphicsItem *m_endHeadItem = nullptr; 107 QList<QPointF> m_points; 108 }; 109 110 } // namespace qmt 111