QGIS API Documentation  3.25.0-Master (dec16ba68b)
qgsvectorlayerchunkloader_p.h
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1 /***************************************************************************
2  qgsvectorlayerchunkloader_p.h
3  --------------------------------------
4  Date : July 2019
5  Copyright : (C) 2019 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 
16 #ifndef QGSVECTORLAYERCHUNKLOADER_P_H
17 #define QGSVECTORLAYERCHUNKLOADER_P_H
18 
20 
21 //
22 // W A R N I N G
23 // -------------
24 //
25 // This file is not part of the QGIS API. It exists purely as an
26 // implementation detail. This header file may change from version to
27 // version without notice, or even be removed.
28 //
29 
30 #include "qgschunkloader_p.h"
31 #include "qgsfeature3dhandler_p.h"
32 #include "qgschunkedentity_p.h"
33 
34 #define SIP_NO_FILE
35 
36 class Qgs3DMapSettings;
37 class QgsVectorLayer;
41 class QgsFeature3DHandler;
42 
43 namespace Qt3DCore
44 {
45  class QTransform;
46 }
47 
48 #include <QFutureWatcher>
49 
50 
58 class QgsVectorLayerChunkLoaderFactory : public QgsQuadtreeChunkLoaderFactory
59 {
60  public:
62  QgsVectorLayerChunkLoaderFactory( const Qgs3DMapSettings &map, QgsVectorLayer *vl, QgsAbstract3DSymbol *symbol, int leafLevel, double zMin, double zMax );
63 
65  virtual QgsChunkLoader *createChunkLoader( QgsChunkNode *node ) const override;
66 
67  const Qgs3DMapSettings &mMap;
68  QgsVectorLayer *mLayer;
69  std::unique_ptr<QgsAbstract3DSymbol> mSymbol;
70  int mLeafLevel;
71 };
72 
73 
82 class QgsVectorLayerChunkLoader : public QgsChunkLoader
83 {
84  public:
86  QgsVectorLayerChunkLoader( const QgsVectorLayerChunkLoaderFactory *factory, QgsChunkNode *node );
87  ~QgsVectorLayerChunkLoader() override;
88 
89  virtual void cancel() override;
90  virtual Qt3DCore::QEntity *createEntity( Qt3DCore::QEntity *parent ) override;
91 
92  private:
93  const QgsVectorLayerChunkLoaderFactory *mFactory;
94  std::unique_ptr<QgsFeature3DHandler> mHandler;
95  Qgs3DRenderContext mContext;
96  std::unique_ptr<QgsVectorLayerFeatureSource> mSource;
97  bool mCanceled = false;
98  QFutureWatcher<void> *mFutureWatcher = nullptr;
99 };
100 
101 
112 class QgsVectorLayerChunkedEntity : public QgsChunkedEntity
113 {
114  Q_OBJECT
115  public:
117  explicit QgsVectorLayerChunkedEntity( QgsVectorLayer *vl, double zMin, double zMax, const QgsVectorLayer3DTilingSettings &tilingSettings, QgsAbstract3DSymbol *symbol, const Qgs3DMapSettings &map );
118 
119  ~QgsVectorLayerChunkedEntity();
120  private slots:
121  void onTerrainElevationOffsetChanged( float newOffset );
122 
123  private:
124  Qt3DCore::QTransform *mTransform = nullptr;
125 };
126 
128 
129 #endif // QGSVECTORLAYERCHUNKLOADER_P_H
Partial snapshot of vector layer's state (only the members necessary for access to features)
Represents a vector layer which manages a vector based data sets.