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65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
/***************************************************************************
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qgsvirtuallayertask.cpp - description
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-------------------
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begin : Jan 19, 2018
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copyright : (C) 2017 by Paul Blottiere
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email : blottiere.paul@gmail.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsvirtuallayertask.h"
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#include "qgslogger.h"
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QgsVirtualLayerTask::QgsVirtualLayerTask( const QgsVirtualLayerDefinition &definition )
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: QgsTask()
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, mDefinition( definition )
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{
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mDefinition.setLazy( true );
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mLayer = qgis::make_unique<QgsVectorLayer>( mDefinition.toString(), "layer", "virtual" );
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}
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bool QgsVirtualLayerTask::run()
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{
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bool rc = false;
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try
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{
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mLayer->reload(); // blocking call because the loading is postponed
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rc = mLayer->isValid();
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}
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catch ( std::exception &e )
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{
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QgsDebugMsg( tr( "Reload error: %1" ).arg( e.what() ) );
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rc = false;
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}
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return rc;
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}
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QgsVirtualLayerDefinition QgsVirtualLayerTask::definition() const
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{
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return mDefinition;
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}
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QgsVectorLayer *QgsVirtualLayerTask::layer()
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{
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return mLayer.get();
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}
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QgsVectorLayer *QgsVirtualLayerTask::takeLayer()
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{
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return mLayer.release();
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}
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void QgsVirtualLayerTask::cancel()
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{
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mLayer->dataProvider()->cancelReload();
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QgsTask::cancel();
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}
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