QGIS API Documentation 3.39.0-Master (699c004a5df)
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qgs3dsymbolregistry.cpp
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1/***************************************************************************
2 qgs3dsymbolregistry.cpp
3 --------------------------------------
4 Date : July 2020
5 Copyright : (C) 2020 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
16#include "qgs3dsymbolregistry.h"
17#include "qgsabstract3dsymbol.h"
18
22
24{
25 qDeleteAll( mMetadata );
26}
27
29{
30 if ( !metadata || mMetadata.contains( metadata->type() ) )
31 return false;
32
33 mMetadata[metadata->type()] = metadata;
34 return true;
35}
36
38{
39 if ( !mMetadata.contains( type ) )
40 return nullptr;
41
42 return mMetadata[type]->create();
43}
44
46{
47 switch ( type )
48 {
50 return createSymbol( QStringLiteral( "point" ) );
52 return createSymbol( QStringLiteral( "line" ) );
54 return createSymbol( QStringLiteral( "polygon" ) );
55 default:
56 return nullptr;
57 }
58}
59
61{
62 if ( !symbol )
63 return nullptr;
64
65 if ( !mMetadata.contains( symbol->type() ) )
66 return nullptr;
67
68 return mMetadata.value( symbol->type() )->createFeatureHandler( layer, symbol );
69}
70
72{
73 return mMetadata.value( type );
74}
75
77{
78 return mMetadata.keys();
79}
GeometryType
The geometry types are used to group Qgis::WkbType in a coarse way.
Definition qgis.h:337
@ Polygon
Polygons.
Stores metadata about one 3D symbol class.
QString type() const
Returns the unique symbol type string.
QStringList symbolTypes() const
Returns a list of all available symbol types.
QgsAbstract3DSymbol * defaultSymbolForGeometryType(Qgis::GeometryType type)
Creates a new instance of the default 3D symbol for the specified geometry type.
QgsAbstract3DSymbol * createSymbol(const QString &type) const
Creates a new instance of a symbol of the specified type.
Qgs3DSymbolAbstractMetadata * symbolMetadata(const QString &type) const
Returns metadata for specified symbol type. Returns nullptr if not found.
QgsFeature3DHandler * createHandlerForSymbol(QgsVectorLayer *layer, const QgsAbstract3DSymbol *symbol)
Creates a feature handler for a symbol, for the specified vector layer.
bool addSymbolType(Qgs3DSymbolAbstractMetadata *metadata)
Registers a new symbol type. Takes ownership of the metadata instance.
virtual QString type() const =0
Returns identifier of symbol type. Each 3D symbol implementation should return a different type.
Represents a vector layer which manages a vector based data sets.