Metadata and modeller exposure support

python/core/processing/qgsprocessingparametertype.sip.in

@@ -43,6 +43,18 @@ This will be used in comboboxes and list widgets.
     virtual QString id() const = 0;
 %Docstring
 A static id for this type which will be used for storing this parameter type.
+%End
+
+    virtual bool exposeToModeller() const;
+%Docstring
+Determines if this parameter is available in the modeller.
+The default implementation returns true.
+%End
+
+    virtual QVariantMap metadata() const;
+%Docstring
+Metadata for this parameter type. Can be used for example to define custom widgets.
+The default implementation returns an empty map.
 %End
 };
 

src/core/CMakeLists.txt

@@ -105,7 +105,7 @@ SET(QGIS_CORE_SRCS
   processing/qgsprocessingfeedback.cpp
   processing/qgsprocessingoutputs.cpp
   processing/qgsprocessingparameters.cpp
-  processing/qgsprocessingparametertypeimpl.cpp
+  processing/qgsprocessingparametertype.cpp
   processing/qgsprocessingprovider.cpp
   processing/qgsprocessingregistry.cpp
   processing/qgsprocessingutils.cpp

src/core/processing/qgsprocessingparametertype.cpp

@@ -0,0 +1,11 @@
+#include "qgsprocessingparametertype.h"
+
+bool QgsProcessingParameterType::exposeToModeller() const
+{
+  return true;
+}
+
+QVariantMap QgsProcessingParameterType::metadata() const
+{
+  return QVariantMap();
+}

src/core/processing/qgsprocessingparametertype.h

@@ -42,6 +42,18 @@ class CORE_EXPORT QgsProcessingParameterType
      * A static id for this type which will be used for storing this parameter type.
      */
     virtual QString id() const = 0;
+
+    /**
+     * Determines if this parameter is available in the modeller.
+     * The default implementation returns true.
+     */
+    virtual bool exposeToModeller() const;
+
+    /**
+     * Metadata for this parameter type. Can be used for example to define custom widgets.
+     * The default implementation returns an empty map.
+     */
+    virtual QVariantMap metadata() const;
 };
 
 #endif // QGSPROCESSINGPARAMETERTYPE_H

src/core/processing/qgsprocessingparametertypeimpl.cpp

@@ -1 +0,0 @@
-#include "qgsprocessingparametertypeimpl.h"