QGIS API Documentation  3.2.0-Bonn (bc43194)
qgssymbolwidgetcontext.h
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1 /***************************************************************************
2  qgssymbolwidgetcontext.h
3  ------------------------
4  begin : September 2016
5  copyright : (C) 2016 by Nyall Dawson
6  email : nyall dot dawson 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 #ifndef QGSSYMBOLWIDGETCONTEXT_H
16 #define QGSSYMBOLWIDGETCONTEXT_H
17 
18 #include <memory>
19 
20 #include "qgsexpressioncontext.h"
21 #include "qgis_gui.h"
22 
23 
24 class QgsMapCanvas;
25 
26 
35 class GUI_EXPORT QgsSymbolWidgetContext // clazy:exclude=rule-of-three
36 {
37  public:
38 
42  QgsSymbolWidgetContext() = default;
43 
49 
50  QgsSymbolWidgetContext &operator=( const QgsSymbolWidgetContext &other );
51 
58  void setMapCanvas( QgsMapCanvas *canvas );
59 
64  QgsMapCanvas *mapCanvas() const;
65 
74  void setExpressionContext( QgsExpressionContext *context );
75 
82  QgsExpressionContext *expressionContext() const;
83 
89  void setAdditionalExpressionContextScopes( const QList< QgsExpressionContextScope > &scopes );
90 
95  QList< QgsExpressionContextScope > additionalExpressionContextScopes() const;
96 
102  QList<QgsExpressionContextScope *> globalProjectAtlasMapLayerScopes( const QgsMapLayer *layer ) const SIP_FACTORY;
103 
104  private:
105 
106  QgsMapCanvas *mMapCanvas = nullptr;
107  std::unique_ptr< QgsExpressionContext > mExpressionContext;
108  QList< QgsExpressionContextScope > mAdditionalScopes;
109 
110 };
111 
112 #endif // QGSSYMBOLWIDGETCONTEXT_H
Base class for all map layer types.
Definition: qgsmaplayer.h:61
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:74
Contains settings which reflect the context in which a symbol (or renderer) widget is shown...
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
#define SIP_FACTORY
Definition: qgis_sip.h:69