Add folder output type

python/core/processing/qgsprocessingoutputs.sip

@@ -38,6 +38,8 @@ class QgsProcessingOutputDefinition
       sipType = sipType_QgsProcessingOutputNumber;
     else if ( sipCpp->type() == "outputString" )
       sipType = sipType_QgsProcessingOutputString;
+    else if ( sipCpp->type() == "outputFolder" )
+      sipType = sipType_QgsProcessingOutputFolder;
 %End
   public:
 
@@ -206,6 +208,25 @@ class QgsProcessingOutputString : QgsProcessingOutputDefinition
     virtual QString type() const;
 };
 
+class QgsProcessingOutputFolder : QgsProcessingOutputDefinition
+{
+%Docstring
+ A folder output for processing algorithms.
+.. versionadded:: 3.0
+%End
+
+%TypeHeaderCode
+#include "qgsprocessingoutputs.h"
+%End
+  public:
+
+    QgsProcessingOutputFolder( const QString &name, const QString &description = QString() );
+%Docstring
+ Constructor for QgsProcessingOutputFolder.
+%End
+
+    virtual QString type() const;
+};
 
 
 

python/plugins/processing/gui/ParametersPanel.py

@@ -38,7 +38,8 @@ from qgis.core import (QgsProcessingParameterDefinition,
                        QgsProcessingOutputVectorLayer,
                        QgsProcessingOutputRasterLayer,
                        QgsProcessingParameterRasterOutput,
-                       QgsProcessingParameterFeatureSink)
+                       QgsProcessingParameterFeatureSink,
+                       QgsProcessingParameterVectorOutput)
 from qgis.PyQt import uic
 from qgis.PyQt.QtCore import QCoreApplication
 from qgis.PyQt.QtWidgets import (QWidget, QHBoxLayout, QToolButton,
@@ -47,8 +48,7 @@ from qgis.PyQt.QtGui import QIcon
 
 from processing.gui.DestinationSelectionPanel import DestinationSelectionPanel
 from processing.gui.wrappers import WidgetWrapperFactory
-from processing.core.parameters import ParameterVector, ParameterExtent, ParameterPoint
-from processing.core.outputs import OutputTable
+
 
 pluginPath = os.path.split(os.path.dirname(__file__))[0]
 WIDGET, BASE = uic.loadUiType(
@@ -157,7 +157,7 @@ class ParametersPanel(BASE, WIDGET):
             widget = DestinationSelectionPanel(output, self.alg)
             self.layoutMain.insertWidget(self.layoutMain.count() - 1, label)
             self.layoutMain.insertWidget(self.layoutMain.count() - 1, widget)
-            if isinstance(output, (QgsProcessingParameterRasterOutput, QgsProcessingParameterFeatureSink, OutputTable)):
+            if isinstance(output, (QgsProcessingParameterRasterOutput, QgsProcessingParameterFeatureSink, QgsProcessingParameterVectorOutput)):
                 check = QCheckBox()
                 check.setText(self.tr('Open output file after running algorithm'))
                 check.setChecked(True)

src/core/processing/qgsprocessingoutputs.cpp

@@ -54,3 +54,8 @@ QgsProcessingOutputNumber::QgsProcessingOutputNumber( const QString &name, const
 QgsProcessingOutputString::QgsProcessingOutputString( const QString &name, const QString &description )
   : QgsProcessingOutputDefinition( name, description )
 {}
+
+QgsProcessingOutputFolder::QgsProcessingOutputFolder( const QString &name, const QString &description )
+  : QgsProcessingOutputDefinition( name, description )
+{
+}

src/core/processing/qgsprocessingoutputs.h

@@ -53,6 +53,8 @@ class CORE_EXPORT QgsProcessingOutputDefinition
       sipType = sipType_QgsProcessingOutputNumber;
     else if ( sipCpp->type() == "outputString" )
       sipType = sipType_QgsProcessingOutputString;
+    else if ( sipCpp->type() == "outputFolder" )
+      sipType = sipType_QgsProcessingOutputFolder;
     SIP_END
 #endif
 
@@ -217,6 +219,23 @@ class CORE_EXPORT QgsProcessingOutputString : public QgsProcessingOutputDefiniti
     QString type() const override { return QStringLiteral( "outputString" ); }
 };
 
+/**
+ * \class QgsProcessingOutputFolder
+ * \ingroup core
+ * A folder output for processing algorithms.
+  * \since QGIS 3.0
+ */
+class CORE_EXPORT QgsProcessingOutputFolder : public QgsProcessingOutputDefinition
+{
+  public:
+
+    /**
+     * Constructor for QgsProcessingOutputFolder.
+     */
+    QgsProcessingOutputFolder( const QString &name, const QString &description = QString() );
+
+    QString type() const override { return QStringLiteral( "outputFolder" ); }
+};
 
 #endif // QGSPROCESSINGOUTPUTS_H
 

src/core/processing/qgsprocessingparameters.cpp

@@ -2313,7 +2313,7 @@ bool QgsProcessingParameterFolderOutput::checkValueIsAcceptable( const QVariant
 
 QgsProcessingOutputDefinition *QgsProcessingParameterFolderOutput::toOutputDefinition() const
 {
-  return nullptr;
+  return new QgsProcessingOutputFolder( name(), description() );
 }
 
 QString QgsProcessingParameterFolderOutput::defaultFileExtension() const