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[bugfix] Fix broken inverted Y support in XYZ layers
This follows the convention used by OpenLayers, where
an inverted axis is indicated by {-y} in the URL
definition.

Fixes #15927

Needs backporting.
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elpaso committed May 17, 2017
1 parent 11475c6 commit ccd5d752254cee7d972e4978cd1e5203b7fa36d3
Showing with 15 additions and 1 deletion.
  1. +15 −1 src/providers/wms/qgswmsprovider.cpp
@@ -1130,7 +1130,15 @@ void QgsWmsProvider::createTileRequestsXYZ( const QgsWmtsTileMatrix *tm, const Q
turl.replace( QLatin1String( "{q}" ), _tile2quadkey( tile.col, tile.row, z ) );

turl.replace( QLatin1String( "{x}" ), QString::number( tile.col ), Qt::CaseInsensitive );
turl.replace( QLatin1String( "{y}" ), QString::number( tile.row ), Qt::CaseInsensitive );
// inverted Y axis
if ( turl.contains( QLatin1String( "{-y}" ) ) )
{
turl.replace( QLatin1String( "{-y}" ), QString::number( tm->matrixHeight - tile.row - 1 ), Qt::CaseInsensitive );
}
else
{
turl.replace( QLatin1String( "{y}" ), QString::number( tile.row ), Qt::CaseInsensitive );
}
turl.replace( QLatin1String( "{z}" ), QString::number( z ), Qt::CaseInsensitive );

QgsDebugMsgLevel( QString( "tileRequest %1 %2/%3 (%4,%5): %6" ).arg( mTileReqNo ).arg( i ).arg( tiles.count() ).arg( tile.row ).arg( tile.col ).arg( turl ), 2 );
@@ -3413,6 +3421,12 @@ QgsImageFetcher *QgsWmsProvider::getLegendGraphicFetcher( const QgsMapSettings *
mapExtent = extent();
}

if ( mSettings.mXyz )
{
// we are working with XYZ tiles: no legend graphics available
return nullptr;
}

QUrl url = getLegendGraphicFullURL( scale, mapExtent );
if ( !url.isValid() )
return nullptr;

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