QGIS API Documentation  3.25.0-Master (dec16ba68b)
qgspluginlayer.cpp
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1 /***************************************************************************
2  qgspluginlayer.cpp
3  ---------------------
4  begin : January 2010
5  copyright : (C) 2010 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 #include "qgspluginlayer.h"
16 
17 #include "qgsmaplayerlegend.h"
18 #include "qgsmaplayerrenderer.h"
19 
20 
21 QgsPluginLayer::QgsPluginLayer( const QString &layerType, const QString &layerName )
22  : QgsMapLayer( QgsMapLayerType::PluginLayer, layerName )
23  , mPluginLayerType( layerType )
24 {
25  mDataProvider = new QgsPluginLayerDataProvider( layerType, QgsDataProvider::ProviderOptions(), QgsDataProvider::ReadFlags() );
26 }
27 
29 {
30  // TODO: shall we move the responsibility of emitting the signal to plugin
31  // layer implementations before they start doing their part of cleanup...?
32  emit willBeDeleted();
33  delete mDataProvider;
34 }
35 
37 {
38  return mPluginLayerType;
39 }
40 
42 {
44  static_cast<QgsPluginLayerDataProvider *>( mDataProvider )->setExtent( extent );
45 }
46 
47 void QgsPluginLayer::setSource( const QString &source )
48 {
50 }
51 
53 {
54  return mDataProvider;
55 }
56 
58 {
59  return mDataProvider;
60 }
61 
62 //
63 // QgsPluginLayerDataProvider
64 //
66 QgsPluginLayerDataProvider::QgsPluginLayerDataProvider( const QString &layerType,
67  const ProviderOptions &options,
68  QgsDataProvider::ReadFlags flags )
69  : QgsDataProvider( QString(), options, flags )
70  , mName( layerType )
71 {}
72 
74 {
76 }
77 
78 QString QgsPluginLayerDataProvider::name() const
79 {
80  return mName;
81 }
82 
83 QString QgsPluginLayerDataProvider::description() const
84 {
85  return QString();
86 }
87 
88 QgsRectangle QgsPluginLayerDataProvider::extent() const
89 {
90  return mExtent;
91 }
92 
93 bool QgsPluginLayerDataProvider::isValid() const
94 {
95  return true;
96 }
This class represents a coordinate reference system (CRS).
Abstract base class for spatial data provider implementations.
Base class for all map layer types.
Definition: qgsmaplayer.h:73
virtual QgsRectangle extent() const
Returns the extent of the layer.
QString source() const
Returns the source for the layer.
void willBeDeleted()
Emitted in the destructor when the layer is about to be deleted, but it is still in a perfectly valid...
virtual void setExtent(const QgsRectangle &rect)
Sets the extent.
QString mDataSource
Data source description string, varies by layer type.
Definition: qgsmaplayer.h:1928
QgsPluginLayer(const QString &layerType, const QString &layerName=QString())
void setSource(const QString &source)
Set source string.
~QgsPluginLayer() override
QString mPluginLayerType
QgsDataProvider * dataProvider() override
Returns the layer's data provider, it may be nullptr.
void setExtent(const QgsRectangle &extent) override
Sets extent of the layer.
QString pluginLayerType()
Returns plugin layer type (the same as used in QgsPluginLayerRegistry)
QgsDataProvider * mDataProvider
A rectangle specified with double values.
Definition: qgsrectangle.h:42
QgsMapLayerType
Types of layers that can be added to a map.
Definition: qgis.h:47
@ PluginLayer
Plugin based layer.
const QgsCoordinateReferenceSystem & crs
Setting options for creating vector data providers.