QGIS API Documentation 3.29.0-Master (ade4f0cf0f)
qgsgrouplayerrenderer.h
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1/***************************************************************************
2 qgsgrouplayerrenderer.h
3 ----------------
4 Date : September 2021
5 Copyright : (C) 2021 by Nyall Dawson
6 Email : nyall dot dawson at gmail dot com
7 ***************************************************************************/
8
9/***************************************************************************
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 ***************************************************************************/
17
18#ifndef QGSGROUPLAYERRENDERER_H
19#define QGSGROUPLAYERRENDERER_H
20
21#define SIP_NO_FILE
22
23#include "qgis_core.h"
24#include "qgis_sip.h"
25#include "qgsmaplayerrenderer.h"
26#include <QPainter>
27#include <tuple>
28#include <vector>
29#include <memory>
30
31class QgsGroupLayer;
32class QgsFeedback;
33class QgsPaintEffect;
35
44{
45 public:
46
52 QgsFeedback *feedback() const override;
53 bool render() override;
54 bool forceRasterRender() const override;
55
56 private:
57 std::unique_ptr< QgsFeedback > mFeedback;
58 bool mForceRasterRender = false;
59 std::vector< std::unique_ptr< QgsMapLayerRenderer > > mChildRenderers;
60 std::vector< QPainter::CompositionMode > mRendererCompositionModes;
61 std::vector< double > mRendererOpacity;
62 std::vector< QgsCoordinateTransform > mTransforms;
63 double mLayerOpacity = 1.0;
64 std::unique_ptr< QgsPaintEffect > mPaintEffect;
65
66};
67
68#endif // QGSGROUPLAYERRENDERER_H
Class for doing transforms between two map coordinate systems.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
Implementation of threaded rendering for group layers.
~QgsGroupLayerRenderer() override
A map layer which consists of a set of child layers, where all component layers are rendered as a sin...
Definition: qgsgrouplayer.h:42
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 bool forceRasterRender() const
Returns true if the renderer must be rendered to a raster paint device (e.g.
virtual QgsFeedback * feedback() const
Access to feedback object of the layer renderer (may be nullptr)
Base class for visual effects which can be applied to QPicture drawings.
Contains information about the context of a rendering operation.