Allow adding a single asset as a layer

src/core/stac/qgsstacasset.cpp

@@ -15,6 +15,8 @@
 
 #include "qgsstacasset.h"
 
+#include <QUrl>
+
 QgsStacAsset::QgsStacAsset( const QString &href,
                             const QString &title,
                             const QString &description,
@@ -72,3 +74,46 @@ QString QgsStacAsset::formatName() const
     return QStringLiteral( "EPT" );
   return QString();
 }
+
+QgsMimeDataUtils::Uri QgsStacAsset::uri() const
+{
+  QgsMimeDataUtils::Uri uri;
+  QUrl url( href() );
+  if ( url.isLocalFile() )
+  {
+    uri.uri = href();
+  }
+  else if ( formatName() == QLatin1String( "COG" ) )
+  {
+    uri.layerType = QStringLiteral( "raster" );
+    uri.providerKey = QStringLiteral( "gdal" );
+    if ( href().startsWith( QLatin1String( "http" ), Qt::CaseInsensitive ) ||
+         href().startsWith( QLatin1String( "ftp" ), Qt::CaseInsensitive ) )
+    {
+      uri.uri = QStringLiteral( "/vsicurl/%1" ).arg( href() );
+    }
+    else if ( href().startsWith( QLatin1String( "s3://" ), Qt::CaseInsensitive ) )
+    {
+      uri.uri = QStringLiteral( "/vsis3/%1" ).arg( href().mid( 5 ) );
+    }
+    else
+    {
+      uri.uri = href();
+    }
+  }
+  else if ( formatName() == QLatin1String( "COPC" ) )
+  {
+    uri.layerType = QStringLiteral( "pointcloud" );
+    uri.providerKey = QStringLiteral( "copc" );
+    uri.uri = href();
+  }
+  else if ( formatName() == QLatin1String( "EPT" ) )
+  {
+    uri.layerType = QStringLiteral( "pointcloud" );
+    uri.providerKey = QStringLiteral( "ept" );
+    uri.uri = href();
+  }
+  uri.name = title().isEmpty() ? url.fileName() : title();
+
+  return uri;
+}

src/core/stac/qgsstacasset.h

@@ -19,6 +19,7 @@
 #define SIP_NO_FILE
 
 #include "qgis_core.h"
+#include "qgsmimedatautils.h"
 
 #include <QString>
 #include <QStringList>
@@ -73,6 +74,12 @@ class CORE_EXPORT QgsStacAsset
      */
     QString formatName() const;
 
+    /**
+     * Returns a uri for the asset if it is a local or cloud optimized file like COG or COPC
+     * \since QGIS 3.42
+     */
+    QgsMimeDataUtils::Uri uri() const;
+
   private:
     QString mHref;
     QString mTitle;

src/core/stac/qgsstacitem.cpp

@@ -191,50 +191,14 @@ QString QgsStacItem::description() const
 QgsMimeDataUtils::UriList QgsStacItem::uris() const
 {
   QgsMimeDataUtils::UriList uris;
-  for ( auto it = mAssets.constBegin(); it != mAssets.constEnd(); ++it )
+  for ( const QgsStacAsset &asset : std::as_const( mAssets ) )
   {
-    QgsMimeDataUtils::Uri uri;
+    QgsMimeDataUtils::Uri uri = asset.uri();
-    QUrl url( it->href() );
-    if ( url.isLocalFile() )
-    {
-      uri.uri = it->href();
-    }
-    else if ( it->formatName() == QLatin1String( "COG" ) )
-    {
-      uri.layerType = QStringLiteral( "raster" );
-      uri.providerKey = QStringLiteral( "gdal" );
-      if ( it->href().startsWith( QLatin1String( "http" ), Qt::CaseInsensitive ) ||
-           it->href().startsWith( QLatin1String( "ftp" ), Qt::CaseInsensitive ) )
-      {
-        uri.uri = QStringLiteral( "/vsicurl/%1" ).arg( it->href() );
-      }
-      else if ( it->href().startsWith( QLatin1String( "s3://" ), Qt::CaseInsensitive ) )
-      {
-        uri.uri = QStringLiteral( "/vsis3/%1" ).arg( it->href().mid( 5 ) );
-      }
-      else
-      {
-        uri.uri = it->href();
-      }
-    }
-    else if ( it->formatName() == QLatin1String( "COPC" ) )
-    {
-      uri.layerType = QStringLiteral( "pointcloud" );
-      uri.providerKey = QStringLiteral( "copc" );
-      uri.uri = it->href();
-    }
-    else if ( it->formatName() == QLatin1String( "EPT" ) )
-    {
-      uri.layerType = QStringLiteral( "pointcloud" );
-      uri.providerKey = QStringLiteral( "ept" );
-      uri.uri = it->href();
-    }
 
     // skip assets with incompatible formats
     if ( uri.uri.isEmpty() )
       continue;
 
-    uri.name = it->title().isEmpty() ? url.fileName() : it->title();
     uris.append( uri );
   }
   return uris;

src/core/stac/qgsstacitem.h

@@ -128,7 +128,7 @@ class CORE_EXPORT QgsStacItem : public QgsStacObject
     QString description() const;
 
     /**
-     * Returns a list of uris of all assets that have a cloud optimized format like COG or COPC
+     * Returns a list of uris of all assets that are local or have a cloud optimized format like COG or COPC
      * \since QGIS 3.42
      */
     QgsMimeDataUtils::UriList uris() const;

src/gui/stac/qgsstacsourceselect.cpp

@@ -123,20 +123,7 @@ void QgsStacSourceSelect::addButtonClicked()
 
   for ( auto &uri : std::as_const( allUris ) )
   {
-    if ( uri.layerType == QLatin1String( "raster" ) )
+    loadUri( uri );
-    {
-      Q_NOWARN_DEPRECATED_PUSH
-      emit addRasterLayer( uri.uri, uri.name, uri.providerKey );
-      Q_NOWARN_DEPRECATED_POP
-      emit addLayer( Qgis::LayerType::Raster, uri.uri, uri.name, uri.providerKey );
-    }
-    else if ( uri.layerType == QLatin1String( "pointcloud" ) )
-    {
-      Q_NOWARN_DEPRECATED_PUSH
-      emit addPointCloudLayer( uri.uri, uri.name, uri.providerKey );
-      Q_NOWARN_DEPRECATED_POP
-      emit addLayer( Qgis::LayerType::PointCloud, uri.uri, uri.name, uri.providerKey );
-    }
   }
 }
 
@@ -512,6 +499,23 @@ void QgsStacSourceSelect::showItemsContextMenu( QPoint point )
   if ( dsm )
     bar = dsm->messageBar();
 
+  const QgsStacItem *item = dynamic_cast<QgsStacItem *>( index.data( QgsStacItemListModel::Role::StacObject ).value<QgsStacObject *>() );
+  QMenu *assetsMenu = menu->addMenu( tr( "Add Layer" ) );
+  const QMap<QString, QgsStacAsset> assets = item->assets();
+  for ( const QgsStacAsset &asset : assets )
+  {
+    if ( asset.isCloudOptimized() )
+    {
+      QAction *loadAssetAction = new QAction( asset.title(), assetsMenu );
+      connect( loadAssetAction, &QAction::triggered, this, [this, &asset]
+      {
+        QgsTemporaryCursorOverride cursorOverride( Qt::WaitCursor );
+        loadUri( asset.uri() );
+      } );
+      assetsMenu->addAction( loadAssetAction );
+    }
+  }
+
   QAction *zoomToAction = new QAction( tr( "Zoom to Item" ) );
   connect( zoomToAction, &QAction::triggered, this, [index, this]
   {
@@ -561,8 +565,11 @@ void QgsStacSourceSelect::showItemsContextMenu( QPoint point )
     details.exec();
   } );
 
+
   menu->addAction( zoomToAction );
   menu->addAction( panToAction );
+  if ( !assetsMenu->isEmpty() )
+    menu->addMenu( assetsMenu );
   menu->addAction( downloadAction );
   menu->addAction( detailsAction );
 
@@ -606,4 +613,21 @@ void QgsStacSourceSelect::showFootprints( bool enable )
   }
 }
 
+void QgsStacSourceSelect::loadUri( const QgsMimeDataUtils::Uri &uri )
+{
+  if ( uri.layerType == QLatin1String( "raster" ) )
+  {
+    Q_NOWARN_DEPRECATED_PUSH
+    emit addRasterLayer( uri.uri, uri.name, uri.providerKey );
+    Q_NOWARN_DEPRECATED_POP
+    emit addLayer( Qgis::LayerType::Raster, uri.uri, uri.name, uri.providerKey );
+  }
+  else if ( uri.layerType == QLatin1String( "pointcloud" ) )
+  {
+    Q_NOWARN_DEPRECATED_PUSH
+    emit addPointCloudLayer( uri.uri, uri.name, uri.providerKey );
+    Q_NOWARN_DEPRECATED_POP
+    emit addLayer( Qgis::LayerType::PointCloud, uri.uri, uri.name, uri.providerKey );
+  }
+}
 ///@endcond

src/gui/stac/qgsstacsourceselect.h

@@ -19,6 +19,7 @@
 #include "ui_qgsstacsourceselectbase.h"
 #include "qgsabstractdatasourcewidget.h"
 #include "qgis_gui.h"
+#include "qgsmimedatautils.h"
 
 #include <QStandardItemModel>
 #include <QStyledItemDelegate>
@@ -32,7 +33,6 @@ class QgsStacItemListModel;
 class QgsStacController;
 class QgsRubberBand;
 
-
 class GUI_EXPORT QgsStacSourceSelect : public QgsAbstractDataSourceWidget, private Ui::QgsStacSourceSelectBase
 {
     Q_OBJECT
@@ -99,6 +99,7 @@ class GUI_EXPORT QgsStacSourceSelect : public QgsAbstractDataSourceWidget, priva
 
     void highlightFootprint( const QModelIndex &index );
     void showFootprints( bool enable );
+    void loadUri( const QgsMimeDataUtils::Uri &uri );
 
     QString mCollectionsUrl;
     QString mSearchUrl;