QGIS API Documentation 3.29.0-Master (ade4f0cf0f)
qgslayertreeembeddedwidgetregistry.cpp
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1/***************************************************************************
2 qgslayertreeembeddedwidgetregistry.cpp
3 --------------------------------------
4 Date : May 2016
5 Copyright : (C) 2016 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 ***************************************************************************/
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20
22{
23 // populate with default implementations
24 addProvider( new QgsLayerTreeOpacityWidget::Provider() );
25}
26
28{
29 const auto constMProviders = mProviders;
30 for ( QgsLayerTreeEmbeddedWidgetProvider *provider : constMProviders )
31 {
33 }
34}
35
37{
38 return mProviders.keys();
39}
40
42{
43 return mProviders.value( providerId );
44}
45
47{
48 if ( mProviders.contains( provider->id() ) )
49 return false;
50
51 mProviders.insert( provider->id(), provider );
52 return true;
53}
54
56{
57 if ( !mProviders.contains( providerId ) )
58 return false;
59
60 delete mProviders.take( providerId );
61 return true;
62}
Provider interface to be implemented in order to introduce new kinds of embedded widgets for use in l...
virtual QString id() const =0
Unique name of the provider (among other providers)
QStringList providers() const
Returns list of all registered providers.
bool addProvider(QgsLayerTreeEmbeddedWidgetProvider *provider)
Register a provider, takes ownership of the object.
bool removeProvider(const QString &providerId)
Unregister a provider, the provider object is deleted.
QMap< QString, QgsLayerTreeEmbeddedWidgetProvider * > mProviders
storage of all the providers
QgsLayerTreeEmbeddedWidgetProvider * provider(const QString &providerId) const
Gets provider object from the provider's ID.
QgsLayerTreeEmbeddedWidgetRegistry()
Constructor for QgsLayerTreeEmbeddedWidgetRegistry/.