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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  protected:
72  virtual void paint( QPainter* p );
73 
75  void updateRect();
76 
77  private:
78  void init();
79  void setSymbol( QgsSymbolV2* symbol, const QgsRenderContext & context, const QColor & color, const QColor & fillColor );
80  double getSymbolWidth( const QgsRenderContext & context, double width, QgsSymbolV2::OutputUnit unit );
82  QgsFeatureRendererV2 * getRenderer( const QgsRenderContext & context, const QColor & color, const QColor & fillColor );
83  void paintPoint( QPainter *p, QgsPoint point );
84  void paintLine( QPainter *p, QgsPolyline line );
85  void paintPolygon( QPainter *p, QgsPolygon polygon );
86 
87  QBrush mBrush;
88  QPen mPen;
92  double mBuffer; // line / outline buffer in pixels
93  double mMinWidth; // line / outline minimum width in pixels
94 };
95 
96 #endif
Base class for all map layer types.
Definition: qgsmaplayer.h:47
QVector< QgsPoint > QgsPolyline
polyline is represented as a vector of points
Definition: qgsgeometry.h:38
An abstract class for items that can be placed on the map canvas.
QgsMapLayer * mLayer
Definition: qgshighlight.h:90
The feature class encapsulates a single feature including its id, geometry and a list of field/values...
Definition: qgsfeature.h:114
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:105
void setBuffer(double buffer)
Set line / outline buffer in millimeters.
Definition: qgshighlight.h:63
QgsFeature mFeature
Definition: qgshighlight.h:91
QgsGeometry * mGeometry
Definition: qgshighlight.h:89
A class for highlight features on the map.
Definition: qgshighlight.h:36
QVector< QgsPolyline > QgsPolygon
polygon: first item of the list is outer ring, inner rings (if any) start from second item ...
Definition: qgsgeometry.h:44
const QgsMapLayer * layer() const
Definition: qgshighlight.h:69
A class to represent a point geometry.
Definition: qgspoint.h:63
double mBuffer
Definition: qgshighlight.h:92
virtual void paint(QPainter *painter)=0
function to be implemented by derived classes
Contains information about the context of a rendering operation.
double mMinWidth
Definition: qgshighlight.h:93
QBrush mBrush
Definition: qgshighlight.h:87
Represents a vector layer which manages a vector based data sets.
void setMinWidth(double width)
Set minimum line / outline width in millimeters.
Definition: qgshighlight.h:67