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qgscomposershape.cpp
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1 /***************************************************************************
2  qgscomposershape.cpp
3  ----------------------
4  begin : November 2009
5  copyright : (C) 2009 by Marco Hugentobler
6  email : [email protected]
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #include "qgscomposershape.h"
19 #include <QPainter>
20 
21 QgsComposerShape::QgsComposerShape( QgsComposition* composition ): QgsComposerItem( composition ), mShape( Ellipse )
22 {
23  setFrameEnabled( true );
24 }
25 
26 QgsComposerShape::QgsComposerShape( qreal x, qreal y, qreal width, qreal height, QgsComposition* composition ): QgsComposerItem( x, y, width, height, composition ), mShape( Ellipse )
27 {
28  setSceneRect( QRectF( x, y, width, height ) );
29  setFrameEnabled( true );
30 }
31 
32 QgsComposerShape::~QgsComposerShape()
33 {
34 
35 }
36 
37 void QgsComposerShape::paint( QPainter* painter, const QStyleOptionGraphicsItem* itemStyle, QWidget* pWidget )
38 {
39  Q_UNUSED( itemStyle );
40  Q_UNUSED( pWidget );
41  if ( !painter )
42  {
43  return;
44  }
45  drawBackground( painter );
46  drawFrame( painter );
47 
48  if ( isSelected() )
49  {
50  drawSelectionBoxes( painter );
51  }
52 }
53 
54 
55 void QgsComposerShape::drawShape( QPainter* p )
56 {
57 
58  p->save();
59  p->setRenderHint( QPainter::Antialiasing );
60 
61  p->translate( rect().width() / 2.0, rect().height() / 2.0 );
62  p->rotate( mRotation );
63  p->translate( -rect().width() / 2.0, -rect().height() / 2.0 );
64 
65  switch ( mShape )
66  {
67  case Ellipse:
68  p->drawEllipse( QRectF( 0, 0 , rect().width(), rect().height() ) );
69  break;
70  case Rectangle:
71  p->drawRect( QRectF( 0, 0 , rect().width(), rect().height() ) );
72  break;
73  case Triangle:
74  QPolygonF triangle;
75  triangle << QPointF( 0, rect().height() );
76  triangle << QPointF( rect().width() , rect().height() );
77  triangle << QPointF( rect().width() / 2.0, 0 );
78  p->drawPolygon( triangle );
79  break;
80  }
81  p->restore();
82 
83 }
84 
85 
86 void QgsComposerShape::drawFrame( QPainter* p )
87 {
88  if ( mFrame && p )
89  {
90  p->setPen( pen() );
91  p->setBrush( Qt::NoBrush );
92  p->setRenderHint( QPainter::Antialiasing, true );
93  drawShape( p );
94  }
95 }
96 
97 void QgsComposerShape::drawBackground( QPainter* p )
98 {
99  if ( mBackground && p )
100  {
101  p->setBrush( brush() );//this causes a problem in atlas generation
102  p->setPen( Qt::NoPen );
103  p->setRenderHint( QPainter::Antialiasing, true );
104  drawShape( p );
105  }
106 }
107 
108 
109 bool QgsComposerShape::writeXML( QDomElement& elem, QDomDocument & doc ) const
110 {
111  QDomElement composerShapeElem = doc.createElement( "ComposerShape" );
112  composerShapeElem.setAttribute( "shapeType", mShape );
113  elem.appendChild( composerShapeElem );
114  return _writeXML( composerShapeElem, doc );
115 }
116 
117 bool QgsComposerShape::readXML( const QDomElement& itemElem, const QDomDocument& doc )
118 {
119  mShape = QgsComposerShape::Shape( itemElem.attribute( "shapeType", "0" ).toInt() );
120 
121  //restore general composer item properties
122  QDomNodeList composerItemList = itemElem.elementsByTagName( "ComposerItem" );
123  if ( composerItemList.size() > 0 )
124  {
125  QDomElement composerItemElem = composerItemList.at( 0 ).toElement();
126  _readXML( composerItemElem, doc );
127  }
128  emit itemChanged();
129  return true;
130 }
131 
132 
133 void QgsComposerShape::setRotation( double r )
134 {
135  //adapt rectangle size
136  double width = rect().width();
137  double height = rect().height();
138  sizeChangedByRotation( width, height );
139 
140  //adapt scene rect to have the same center and the new width / height
141  double x = transform().dx() + rect().width() / 2.0 - width / 2.0;
142  double y = transform().dy() + rect().height() / 2.0 - height / 2.0;
143  QgsComposerItem::setSceneRect( QRectF( x, y, width, height ) );
144 
145  QgsComposerItem::setRotation( r );
146 }
147 
148 void QgsComposerShape::setSceneRect( const QRectF& rectangle )
149 {
150 
151 
152  //consider to change size of the shape if the rectangle changes width and/or height
153  if ( rectangle.width() != rect().width() || rectangle.height() != rect().height() )
154  {
155  double newShapeWidth = rectangle.width();
156  double newShapeHeight = rectangle.height();
157  imageSizeConsideringRotation( newShapeWidth, newShapeHeight );
158  }
159 
160  QgsComposerItem::setSceneRect( rectangle );
161 }
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