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qgsrendererv2registry.cpp
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1 /***************************************************************************
2  qgsrendererv2registry.cpp
3  ---------------------
4  begin : November 2009
5  copyright : (C) 2009 by Martin Dobias
6  email : wonder dot sk at gmail dot com
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 #include "qgsrendererv2registry.h"
16 
17 // default renderers
21 #include "qgsrulebasedrendererv2.h"
23 
25 {
26  // add default renderers
27  addRenderer( new QgsRendererV2Metadata( "singleSymbol",
28  QObject::tr( "Single Symbol" ),
31 
32  addRenderer( new QgsRendererV2Metadata( "categorizedSymbol",
33  QObject::tr( "Categorized" ),
35  addRenderer( new QgsRendererV2Metadata( "graduatedSymbol",
36  QObject::tr( "Graduated" ),
38 
39  addRenderer( new QgsRendererV2Metadata( "RuleRenderer",
40  QObject::tr( "Rule-based" ),
43 
44  addRenderer( new QgsRendererV2Metadata( "pointDisplacement",
45  QObject::tr( "Point displacement" ),
47 }
48 
50 {
51  foreach ( QString name, mRenderers.keys() )
52  {
53  delete mRenderers[name];
54  }
55  mRenderers.clear();
56 }
57 
59 {
60  static QgsRendererV2Registry mInstance;
61  return &mInstance;
62 }
63 
64 
66 {
67  if ( metadata == NULL || mRenderers.contains( metadata->name() ) )
68  return false;
69 
70  mRenderers[metadata->name()] = metadata;
71  mRenderersOrder << metadata->name();
72  return true;
73 }
74 
75 bool QgsRendererV2Registry::removeRenderer( QString rendererName )
76 {
77  if ( !mRenderers.contains( rendererName ) )
78  return false;
79 
80  delete mRenderers[rendererName];
81  mRenderers.remove( rendererName );
82  mRenderersOrder.removeAll( rendererName );
83  return true;
84 }
85 
87 {
88  return mRenderers.value( rendererName );
89 }
90 
92 
94 {
95  return mRenderersOrder;
96 }
static QgsRendererV2Registry * instance()
QgsRendererV2AbstractMetadata * rendererMetadata(QString rendererName)
get metadata for particular renderer. Returns NULL if not found in registry.
static QgsFeatureRendererV2 * create(QDomElement &element)
static QgsFeatureRendererV2 * create(QDomElement &symbologyElem)
create a renderer from XML element
QMap< QString, QgsRendererV2AbstractMetadata * > mRenderers
static QgsFeatureRendererV2 * createFromSld(QDomElement &element, QGis::GeometryType geomType)
static QgsFeatureRendererV2 * createFromSld(QDomElement &element, QGis::GeometryType geomType)
Stores metadata about one renderer class.
Registry of renderers.
QStringList renderersList()
return a list of available renderers
static QgsFeatureRendererV2 * create(QDomElement &element)
create renderer from XML element
bool addRenderer(QgsRendererV2AbstractMetadata *metadata)
add a renderer to registry. Takes ownership of the metadata object.
QgsRendererV2Registry()
protected constructor
Convenience metadata class that uses static functions to create renderer and its widget.
static QgsFeatureRendererV2 * create(QDomElement &element)
create renderer from XML element
static QgsFeatureRendererV2 * create(QDomElement &element)
create renderer from XML element
QStringList mRenderersOrder
list to keep order in which renderers have been added
#define tr(sourceText)
bool removeRenderer(QString rendererName)
remove renderer from registry