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 #include <QVector> 30 31 QT_BEGIN_NAMESPACE 32 class QGraphicsRectItem; 33 QT_END_NAMESPACE 34 35 namespace qmt { 36 37 class IResizable; 38 39 class RectangularSelectionItem : public QGraphicsItem 40 { 41 class GraphicsHandleItem; 42 friend class GraphicsHandleItem; 43 44 enum HandleStatus { 45 Press, 46 Move, 47 Release, 48 Cancel 49 }; 50 51 enum HandleQualifier { 52 None, 53 KeepPos 54 }; 55 56 public: 57 enum Handle { 58 HandleNone = -1, 59 HandleFirst = 0, 60 HandleTopLeft = HandleFirst, 61 HandleTop, 62 HandleTopRight, 63 HandleLeft, 64 HandleRight, 65 HandleBottomLeft, 66 HandleBottom, 67 HandleBottomRight, 68 HandleLast = HandleBottomRight 69 }; 70 71 enum Freedom { 72 FreedomAny, 73 FreedomVerticalOnly, 74 FreedomHorizontalOnly, 75 FreedomKeepRatio 76 }; 77 78 explicit RectangularSelectionItem(IResizable *itemResizer, QGraphicsItem *parent = nullptr); 79 ~RectangularSelectionItem() override; 80 81 QRectF boundingRect() const override; 82 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override; 83 rect()84 QRectF rect() const { return m_rect; } 85 void setRect(const QRectF &rectangle); 86 void setRect(qreal x, qreal y, qreal width, qreal height); pointSize()87 QSizeF pointSize() const { return m_pointSize; } 88 void setPointSize(const QSizeF &size); showBorder()89 bool showBorder() const { return m_showBorder; } 90 void setShowBorder(bool showBorder); freedom()91 Freedom freedom() const { return m_freedom; } 92 void setFreedom(Freedom freedom); isSecondarySelected()93 bool isSecondarySelected() const { return m_isSecondarySelected; } 94 void setSecondarySelected(bool secondarySelected); activeHandle()95 Handle activeHandle() const { return m_activeHandle; } 96 97 private: 98 void update(); 99 void moveHandle(Handle handle, const QPointF &deltaMove, HandleStatus handleStatus, 100 HandleQualifier handleQualifier); 101 102 IResizable *m_itemResizer = nullptr; 103 QRectF m_rect; 104 QSizeF m_pointSize; 105 QVector<GraphicsHandleItem *> m_points; 106 QPointF m_originalResizePos; 107 QRectF m_originalResizeRect; 108 bool m_showBorder = false; 109 QGraphicsRectItem *m_borderItem = nullptr; 110 Freedom m_freedom = FreedomAny; 111 bool m_isSecondarySelected = false; 112 Handle m_activeHandle = HandleNone; 113 }; 114 115 } // namespace qmt 116