QGIS API Documentation  3.18.1-Zürich (202f1bf7e5)
qgsannotationlayerrenderer.h
Go to the documentation of this file.
1 /***************************************************************************
2  qgsannotationlayerrenderer.h
3  ----------------
4  copyright : (C) 2019 by Sandro Mani
5  email : smani at sourcepole dot ch
6  ***************************************************************************/
7 
8 /***************************************************************************
9  * *
10  * This program is free software; you can redistribute it and/or modify *
11  * it under the terms of the GNU General Public License as published by *
12  * the Free Software Foundation; either version 2 of the License, or *
13  * (at your option) any later version. *
14  * *
15  ***************************************************************************/
16 
17 #ifndef QGSANNOTATIONLAYERRENDERER_H
18 #define QGSANNOTATIONLAYERRENDERER_H
19 
20 #define SIP_NO_FILE
21 
22 #include "qgis_core.h"
23 #include "qgis_sip.h"
24 #include "qgsmaplayerrenderer.h"
25 #include "qgsannotationitem.h"
26 
27 class QgsAnnotationLayer;
28 
37 {
38  public:
39 
44  ~QgsAnnotationLayerRenderer() override;
45  QgsFeedback *feedback() const override;
46  bool render() override;
47  bool forceRasterRender() const override;
48 
49  private:
50  QVector< QgsAnnotationItem *> mItems;
51  std::unique_ptr< QgsFeedback > mFeedback;
52  double mLayerOpacity = 1.0;
53 
54 };
55 
56 #endif // QGSANNOTATIONLAYERRENDERER_H
Implementation of threaded rendering for annotation layers.
Represents a map layer containing a set of georeferenced annotations, e.g.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Base class for utility classes that encapsulate information necessary for rendering of map layers.
virtual bool render()=0
Do the rendering (based on data stored in the class).
virtual QgsFeedback * feedback() const
Access to feedback object of the layer renderer (may be nullptr)
virtual bool forceRasterRender() const
Returns true if the renderer must be rendered to a raster paint device (e.g.
Contains information about the context of a rendering operation.