Root/Software/sie_cg/lineitem.cpp

1/****************************************************************************
2**
3** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the examples of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <QtGui>
43
44#include "lineitem.h"
45#include "diagramscene.h"
46#include <math.h>
47
48lineItem::lineItem(QPointF startPoint, QPointF endItem, Arrow *ownerArrow,
49    int wt, bool movable, QGraphicsItem *parent, QGraphicsScene *scene)
50    : QGraphicsLineItem(parent, scene)
51{
52    isMovable=movable;
53    if(isMovable)
54        setFlag(QGraphicsItem::ItemIsMovable, true);
55
56    setFlag(QGraphicsItem::ItemIsSelectable, true);
57
58    myColor = Qt::black;
59    setPen(QPen(myColor, 2, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
60    setLine(QLineF(startPoint,endItem));
61    myOwnerArrow = ownerArrow;
62    pWidth=wt;
63    moveItem=0;
64}
65
66QRectF lineItem::boundingRect() const
67{
68    qreal extra = (pen().width() + 20) / 2.0;
69
70    return QRectF(line().p1(), QSizeF(line().p2().x() - line().p1().x(),
71                                      line().p2().y() - line().p1().y()))
72        .normalized()
73        .adjusted(-extra, -extra, extra, extra);
74}
75
76QPainterPath lineItem::shape() const
77{
78    QPainterPath path = QGraphicsLineItem::shape();
79    return path;
80}
81
82void lineItem::updatePos()
83{
84    QPointF itemPos = this->line().p1();
85    myOwnerArrow->moveCorner(itemPos,this);
86}
87
88void lineItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *,
89          QWidget *)
90{
91    QPen myPen = pen();
92    myPen.setColor(myColor);
93    myPen.setWidth(pWidth);
94    painter->setPen(myPen);
95    painter->setBrush(myColor);
96
97    setLine(line());
98        painter->drawLine(line());
99
100        //Drawing arrow selected
101        if (isSelected()) {
102            painter->setPen(QPen(Qt::gray, pWidth, Qt::SolidLine));
103            QLineF myLine = line();
104            painter->drawLine(myLine);
105        }
106}
107
108QVariant lineItem::itemChange(GraphicsItemChange change,
109                     const QVariant &value)
110{
111    if (change == QGraphicsItem::ItemPositionChange)
112        positionChanged=1;
113
114    return value;
115}
116
117void lineItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *mouseEvent)
118{
119    if(!isMovable)
120    {
121        qobject_cast<DiagramScene *>(myOwnerArrow->myOwnerScene)
122                ->saveUndoState();
123        myOwnerArrow->createCorner(mouseEvent->pos(),this);
124    }
125    QGraphicsLineItem::mouseDoubleClickEvent(mouseEvent);
126}
127
128
129void lineItem::mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent)
130{
131    positionChanged=0;
132    qobject_cast<DiagramScene *>(myOwnerArrow->myOwnerScene)->saveUndo();
133    myOwner()->setSelectedLines(false);
134    setSelected(true);
135    QGraphicsLineItem::mousePressEvent(mouseEvent);
136}
137
138void lineItem::mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent)
139{
140    if(isMovable)
141    {
142        updatePos();
143    }
144    QGraphicsLineItem::mouseMoveEvent(mouseEvent);
145}
146
147void lineItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent)
148{
149    if(isMovable)
150    {
151        updatePos();
152    }
153    if(!positionChanged)
154        qobject_cast<DiagramScene *>(myOwnerArrow->myOwnerScene)
155                ->removeLastUndo();
156    else
157        qobject_cast<DiagramScene *>(myOwnerArrow->myOwnerScene)
158                ->clearRedo();
159    QGraphicsLineItem::mouseReleaseEvent(mouseEvent);
160}
161

Archive Download this file

Branches:
master



interactive