QGIS API Documentation 3.30.0-'s-Hertogenbosch (f186b8efe0)
qgslayermetadataresultsmodel.h
Go to the documentation of this file.
1/***************************************************************************
2 qgslayermetadataresultsmodel.h - QgsLayerMetadataResultsModel
3
4 ---------------------
5 begin : 1.9.2022
6 copyright : (C) 2022 by ale
7 email : [your-email-here]
8 ***************************************************************************
9 * *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License as published by *
12 * the Free Software Foundation; either version 2 of the License, or *
13 * (at your option) any later version. *
14 * *
15 ***************************************************************************/
16#ifndef QGSLAYERMETADATARESULTSMODEL_H
17#define QGSLAYERMETADATARESULTSMODEL_H
18
19#include <QAbstractTableModel>
20#include <QObject>
21#include <QThread>
22#include "qgis_gui.h"
24
25class QgsFeedback;
26
27
29
30#ifndef SIP_RUN
31
36class QgsMetadataResultsFetcher: public QObject
37{
38 Q_OBJECT
39
40 public:
41
43 QgsMetadataResultsFetcher( const QgsAbstractLayerMetadataProvider *metadataProvider, const QgsMetadataSearchContext &searchContext, QgsFeedback *feedback );
44
46 void fetchMetadata( );
47
48 signals:
49
51 void resultsReady( const QgsLayerMetadataSearchResults &results );
52
53 private:
54
55 const QgsAbstractLayerMetadataProvider *mLayerMetadataProvider = nullptr;
56 QgsMetadataSearchContext mSearchContext;
57 QgsFeedback *mFeedback;
58};
59
60#endif
61
63
71class GUI_EXPORT QgsLayerMetadataResultsModel : public QAbstractTableModel
72{
73 Q_OBJECT
74
75 public:
76
81 explicit QgsLayerMetadataResultsModel( const QgsMetadataSearchContext &searchContext, QObject *parent = nullptr );
82
84
85
86 // QAbstractTableModel interface
87
88 int rowCount( const QModelIndex &parent ) const override;
89 int columnCount( const QModelIndex &parent ) const override;
90 QVariant data( const QModelIndex &index, int role ) const override;
91 QVariant headerData( int section, Qt::Orientation orientation, int role ) const override;
92
94 void reload( );
95
97 void reloadAsync( );
98
102 enum Roles
103 {
105 Metadata = Qt::ItemDataRole::UserRole
106 };
107
112 {
123 };
124
125 public slots:
126
130 void resultsReady( const QgsLayerMetadataSearchResults &results );
131
135 void cancel();
136
137 signals:
138
142 void progressChanged( int progress );
143
144 private:
145
146 std::unique_ptr<QgsFeedback> mFeedback;
148 QgsMetadataSearchContext mSearchContext;
149 std::vector<std::unique_ptr<QgsMetadataResultsFetcher>> mWorkers;
150 std::vector<std::unique_ptr<QThread>> mWorkerThreads;
151
152};
153
154#endif // QGSLAYERMETADATARESULTSMODEL_H
Layer metadata provider backend interface.
Base class for feedback objects to be used for cancellation of something running in a worker thread.
Definition: qgsfeedback.h:45
The QgsLayerMetadataResultsModel class handles the metadata fetching from the registered layer metada...
Sections
The Sections enum represents the data columns.
@ DataProviderName
Layer data provider name.
Roles
The Roles enum represents the user roles for the model.
void progressChanged(int progress)
Emitted when the progress changed to progress.
Container of result records from a layer metadata search.