QGIS API Documentation 3.37.0-Master (fa0c88a90b0)
qgsprojectstorageguiregistry.cpp
Go to the documentation of this file.
1/***************************************************************************
2 qgsprojectstorageguiregistry.cpp
3 -------------------
4 begin : June 2019
5 copyright : (C) 2019 by Peter Petrik
6 email : zilolv at google 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
21
23
25{
26 qDeleteAll( mBackends );
27}
28
30{
31 return mBackends.value( type, nullptr );
32}
33
35{
36 for ( auto it = mBackends.constBegin(); it != mBackends.constEnd(); ++it )
37 {
38 QgsProjectStorageGuiProvider *storage = it.value();
39 const QString scheme = storage->type() + ':';
40 if ( uri.startsWith( scheme ) )
41 return storage;
42 }
43 return nullptr;
44}
45
46QList<QgsProjectStorageGuiProvider *> QgsProjectStorageGuiRegistry::projectStorages() const
47{
48 return mBackends.values();
49}
50
52{
53 mBackends.insert( storage->type(), storage );
54}
55
57{
58 delete mBackends.take( storage->type() );
59}
60
62{
63 if ( !providerGuiRegistry )
64 return;
65
66 const QStringList providersList = providerGuiRegistry->providerList();
67 for ( const QString &key : providersList )
68 {
69 const QList<QgsProjectStorageGuiProvider *> providerList = providerGuiRegistry->projectStorageGuiProviders( key );
70 // the function is a factory - we keep ownership of the returned providers
71 for ( QgsProjectStorageGuiProvider *provider : providerList )
72 {
73 mBackends[key] = provider;
74 }
75 }
76}
Abstract interface for project storage GUI - to be implemented by various backends and registered in ...
virtual QString type()=0
Unique identifier of the project storage type.
QgsProjectStorageGuiProvider * projectStorageFromType(const QString &type)
Returns storage implementation if the storage type matches one. Returns nullptr otherwise (it is a no...
void unregisterProjectStorage(QgsProjectStorageGuiProvider *storage)
Unregisters a storage backend and destroys its instance.
QList< QgsProjectStorageGuiProvider * > projectStorages() const
Returns a list of registered project storage implementations.
void registerProjectStorage(QgsProjectStorageGuiProvider *storage)
Registers a storage backend and takes ownership of it.
void initializeFromProviderGuiRegistry(QgsProviderGuiRegistry *providerGuiRegistry)
Initializes the registry.
QgsProjectStorageGuiProvider * projectStorageFromUri(const QString &uri)
Returns storage implementation if the URI matches one. Returns nullptr otherwise (it is a normal file...
A registry / canonical manager of GUI parts of data providers.
virtual QList< QgsProjectStorageGuiProvider * > projectStorageGuiProviders(const QString &providerKey)
Returns all project storage gui providers registered in provider with providerKey.
QStringList providerList() const
Returns list of available providers by their keys.