const QImage& QgsWMSLegendNode::getLegendGraphic() const
{
if ( ! mValid && ! mFetcher )
{
// or maybe in presence of a downloader we should just delete it
// and start a new one ?
QgsRasterLayer* layer = qobject_cast<QgsRasterLayer*>( mLayerNode->layer() );
const QgsLayerTreeModel* mod = model();
if ( ! mod ) return mImage;
const QgsMapSettings* ms = mod->legendFilterByMap();
QgsRasterDataProvider* prov = layer->dataProvider();
Q_ASSERT( ! mFetcher );
mFetcher.reset( prov->getLegendGraphicFetcher( ms ) );
if ( mFetcher )
{
connect( mFetcher.data(), SIGNAL( finish( const QImage& ) ), this, SLOT( getLegendGraphicFinished( const QImage& ) ) );
connect( mFetcher.data(), SIGNAL( error( const QString& ) ), this, SLOT( getLegendGraphicErrored( const QString& ) ) );
connect( mFetcher.data(), SIGNAL( progress( qint64, qint64 ) ), this, SLOT( getLegendGraphicProgress( qint64, qint64 ) ) );
mFetcher->start();
} // else QgsDebugMsg("XXX No legend supported ?");
}
QImage QgsWmsLegendNode::getLegendGraphic() const
{
if ( ! mValid && ! mFetcher )
{
// or maybe in presence of a downloader we should just delete it
// and start a new one ?
QgsRasterLayer *layer = qobject_cast<QgsRasterLayer *>( mLayerNode->layer() );
const QgsLayerTreeModel *mod = model();
if ( ! mod )
return mImage;
const QgsMapSettings *ms = mod->legendFilterMapSettings();
QgsRasterDataProvider *prov = layer->dataProvider();
if ( ! prov )
return mImage;
Q_ASSERT( ! mFetcher );
mFetcher.reset( prov->getLegendGraphicFetcher( ms ) );
if ( mFetcher )
{
connect( mFetcher.get(), &QgsImageFetcher::finish, this, &QgsWmsLegendNode::getLegendGraphicFinished );
connect( mFetcher.get(), &QgsImageFetcher::error, this, &QgsWmsLegendNode::getLegendGraphicErrored );
connect( mFetcher.get(), &QgsImageFetcher::progress, this, &QgsWmsLegendNode::getLegendGraphicProgress );
mFetcher->start();
} // else QgsDebugMsg("XXX No legend supported?");
}
return mImage;
}
