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qgshighlight.h
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1 /***************************************************************************
2  qgshighlight.h - widget to highlight geometries
3  --------------------------------------
4  Date : 02-Mar-2011
5  Copyright : (C) 2011 by Juergen E. Fischer, norBIT GmbH
6  Email : jef at norbit dot de
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 #ifndef QGSHIGHLIGHT_H
16 #define QGSHIGHLIGHT_H
17 
18 #include "qgsmapcanvasitem.h"
19 #include "qgsfeaturestore.h"
20 #include "qgsgeometry.h"
21 #include "qgsrendererv2.h"
22 #include "qgssymbolv2.h"
23 #include <QBrush>
24 #include <QColor>
25 #include <QList>
26 #include <QPen>
27 #include <QPainter>
28 #include <QPainterPath>
29 
30 class QgsMapLayer;
31 class QgsVectorLayer;
32 class QgsSymbolV2;
33 
36 class GUI_EXPORT QgsHighlight: public QgsMapCanvasItem
37 {
38  public:
39  QgsHighlight( QgsMapCanvas *mapCanvas, QgsGeometry *geom, QgsMapLayer *layer );
40  QgsHighlight( QgsMapCanvas *mapCanvas, QgsGeometry *geom, QgsVectorLayer *layer );
47  QgsHighlight( QgsMapCanvas *mapCanvas, const QgsFeature& feature, QgsVectorLayer *layer );
48  ~QgsHighlight();
49 
52  void setColor( const QColor & color );
53 
56  void setFillColor( const QColor & fillColor );
57 
59  void setWidth( int width );
60 
63  void setBuffer( double buffer ) { mBuffer = buffer; }
64 
67  void setMinWidth( double width ) { mMinWidth = width; }
68 
69  const QgsMapLayer *layer() const { return mLayer; }
70 
71  virtual void updatePosition() override;
72 
73  protected:
74  virtual void paint( QPainter* p ) override;
75 
77  void updateRect();
78 
79  private:
80  void init();
81  void setSymbol( QgsSymbolV2* symbol, const QgsRenderContext & context, const QColor & color, const QColor & fillColor );
82  double getSymbolWidth( const QgsRenderContext & context, double width, QgsSymbolV2::OutputUnit unit );
84  QgsFeatureRendererV2 * getRenderer( const QgsRenderContext & context, const QColor & color, const QColor & fillColor );
85  void paintPoint( QPainter *p, QgsPoint point );
86  void paintLine( QPainter *p, QgsPolyline line );
87  void paintPolygon( QPainter *p, QgsPolygon polygon );
88 
89  QBrush mBrush;
90  QPen mPen;
91  QgsGeometry *mGeometry;
92  QgsMapLayer *mLayer;
93  QgsFeature mFeature;
94  double mBuffer; // line / outline buffer in pixels
95  double mMinWidth; // line / outline minimum width in pixels
96 };
97 
98 #endif