Support for project items in browser for PostgreSQL

Switched from using URLs in mime data to URI list for drag-n-drop of projects
so that they are handled in the same way as the other browser items.

Author: wonder-sk

python/core/qgsdataitem.sip.in

@@ -586,6 +586,9 @@ Data item that can be used to represent QGIS projects.
 
     virtual bool hasDragEnabled() const;
 
+    virtual QgsMimeDataUtils::Uri mimeUri() const;
+
+
 };
 
 class QgsErrorItem : QgsDataItem

python/gui/qgsbrowserdockwidget.sip.in

@@ -116,7 +116,7 @@ Splitter has been moved
 %End
 
   signals:
-    void openFile( const QString & );
+    void openFile( const QString &fileName, const QString &fileTypeHint = QString() );
 %Docstring
 Emitted when a file needs to be opened
 %End

src/app/qgisapp.cpp

@@ -1683,6 +1683,10 @@ void QgisApp::handleDropUriList( const QgsMimeDataUtils::UriList &lst )
         }
       }
     }
+    else if ( u.layerType == QStringLiteral( "project" ) )
+    {
+      openFile( u.uri, QStringLiteral( "project" ) );
+    }
   }
 }
 
@@ -6049,11 +6053,11 @@ bool QgisApp::openLayer( const QString &fileName, bool allowInteractive )
 
 
 // Open a file specified by a commandline argument, Drop or FileOpen event.
-void QgisApp::openFile( const QString &fileName )
+void QgisApp::openFile( const QString &fileName, const QString &fileTypeHint )
 {
   // check to see if we are opening a project file
   QFileInfo fi( fileName );
-  if ( fi.suffix() == QLatin1String( "qgs" ) || fi.suffix() == QLatin1String( "qgz" ) )
+  if ( fileTypeHint == QStringLiteral( "project" ) || fi.suffix() == QLatin1String( "qgs" ) || fi.suffix() == QLatin1String( "qgz" ) )
   {
     QgsDebugMsg( "Opening project " + fileName );
     openProject( fileName );

src/app/qgisapp.h

@@ -703,7 +703,7 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
     //! Process the list of URIs that have been dropped in QGIS
     void handleDropUriList( const QgsMimeDataUtils::UriList &lst );
     //! Convenience function to open either a project or a layer file.
-    void openFile( const QString &fileName );
+    void openFile( const QString &fileName, const QString &fileTypeHint = QString() );
     void layerTreeViewDoubleClicked( const QModelIndex &index );
     //! Make sure the insertion point for new layers is up-to-date with the current item in layer tree view
     void updateNewLayerInsertionPoint();

src/core/qgsbrowsermodel.cpp

@@ -467,16 +467,6 @@ QMimeData *QgsBrowserModel::mimeData( const QModelIndexList &indexes ) const
     if ( index.isValid() )
     {
       QgsDataItem *ptr = reinterpret_cast< QgsDataItem * >( index.internalPointer() );
-      if ( ptr->type() == QgsDataItem::Project )
-      {
-        QMimeData *mimeData = new QMimeData();
-        QUrl url = QUrl::fromLocalFile( ptr->path() );
-        QList<QUrl> urls;
-        urls << url;
-        mimeData->setUrls( urls );
-        return mimeData;
-      }
-
       QgsMimeDataUtils::Uri uri = ptr->mimeUri();
       if ( uri.isValid() )
         lst.append( uri );

src/core/qgsdataitem.cpp

@@ -1092,6 +1092,15 @@ QgsProjectItem::QgsProjectItem( QgsDataItem *parent, const QString &name, const
   setState( Populated ); // no more children
 }
 
+QgsMimeDataUtils::Uri QgsProjectItem::mimeUri() const
+{
+  QgsMimeDataUtils::Uri u;
+  u.layerType = QStringLiteral( "project" );
+  u.name = mName;
+  u.uri = mPath;
+  return u;
+}
+
 QgsErrorItem::QgsErrorItem( QgsDataItem *parent, const QString &error, const QString &path )
   : QgsDataItem( QgsDataItem::Error, parent, error, path )
 {

src/core/qgsdataitem.h

@@ -598,6 +598,8 @@ class CORE_EXPORT QgsProjectItem : public QgsDataItem
 
     bool hasDragEnabled() const override { return true; }
 
+    QgsMimeDataUtils::Uri mimeUri() const override;
+
 };
 
 /**

src/core/qgsmimedatautils.h

@@ -63,13 +63,14 @@ class CORE_EXPORT QgsMimeDataUtils
        */
       QgsRasterLayer *rasterLayer( bool &owner, QString &error ) const;
 
-      //! Type of URI. Recognized types: "vector" / "raster" / "plugin" / "custom"
+      //! Type of URI. Recognized types: "vector" / "raster" / "plugin" / "custom" / "project"
       QString layerType;
 
       /**
        * For "vector" / "raster" type: provider id.
        * For "plugin" type: plugin layer type name.
        * For "custom" type: key of its QgsCustomDropHandler
+       * For "project" type: unused
        */
       QString providerKey;
       //! Human readable name to be used e.g. in layer tree

src/gui/qgsbrowserdockwidget.cpp

@@ -361,7 +361,7 @@ void QgsBrowserDockWidget::addLayerAtIndex( const QModelIndex &index )
     if ( projectItem )
     {
       QApplication::setOverrideCursor( Qt::WaitCursor );
-      emit openFile( projectItem->path() );
+      emit openFile( projectItem->path(), QStringLiteral( "project" ) );
       QApplication::restoreOverrideCursor();
     }
   }
@@ -393,7 +393,7 @@ void QgsBrowserDockWidget::addSelectedLayers()
     {
       QgsProjectItem *projectItem = qobject_cast<QgsProjectItem *>( item );
       if ( projectItem )
-        emit openFile( projectItem->path() );
+        emit openFile( projectItem->path(), QStringLiteral( "project" ) );
 
       QApplication::restoreOverrideCursor();
       return;

src/gui/qgsbrowserdockwidget.h

@@ -100,7 +100,7 @@ class GUI_EXPORT QgsBrowserDockWidget : public QgsDockWidget, private Ui::QgsBro
 
   signals:
     //! Emitted when a file needs to be opened
-    void openFile( const QString & );
+    void openFile( const QString &fileName, const QString &fileTypeHint = QString() );
     //! Emitted when drop uri list needs to be handled
     void handleDropUriList( const QgsMimeDataUtils::UriList & );
     //! Connections changed in the browser

src/gui/qgsdatasourcemanagerdialog.h

@@ -106,7 +106,7 @@ class GUI_EXPORT QgsDataSourceManagerDialog : public QgsOptionsDialogBase, priva
     //! Emitted when a DB layer was selected for addition: for signal forwarding to QgisApp
     void addDatabaseLayers( const QStringList &layerPathList, const QString &providerKey );
     //! Emitted when a file needs to be opened
-    void openFile( const QString & );
+    void openFile( const QString &fileName, const QString &fileTypeHint = QString() );
     //! Emitted when drop uri list needs to be handled from the browser
     void handleDropUriList( const QgsMimeDataUtils::UriList & );
     //! Update project home directory

src/providers/postgres/qgspostgresdataitems.cpp

@@ -16,11 +16,13 @@
 
 #include "qgspostgresconn.h"
 #include "qgspostgresconnpool.h"
+#include "qgspostgresprojectstorage.h"
 #include "qgscolumntypethread.h"
 #include "qgslogger.h"
 #include "qgsdatasourceuri.h"
 #include "qgsapplication.h"
 #include "qgsmessageoutput.h"
+#include "qgsprojectstorageregistry.h"
 #include "qgsvectorlayer.h"
 
 #ifdef HAVE_GUI
@@ -573,6 +575,22 @@ QVector<QgsDataItem *> QgsPGSchemaItem::createChildren()
   }
 
   QgsPostgresConnPool::instance()->releaseConnection( conn );
+
+  if ( QgsProjectStorage *storage = QgsApplication::projectStorageRegistry()->projectStorageFromType( "postgresql" ) )
+  {
+    QgsPostgresProjectUri postUri;
+    postUri.connInfo = uri;
+    postUri.schemaName = mName;
+    QString schemaUri = QgsPostgresProjectStorage::encodeUri( postUri );
+    const QStringList projectNames = storage->listProjects( schemaUri );
+    for ( const QString &projectName : projectNames )
+    {
+      QgsPostgresProjectUri projectUri( postUri );
+      projectUri.projectName = projectName;
+      items.append( new QgsProjectItem( this, projectName, QgsPostgresProjectStorage::encodeUri( projectUri ) ) );
+    }
+  }
+
   return items;
 }