[processing] more work on parameter wrappers

python/plugins/processing/core/parameters.py

@@ -106,8 +106,10 @@ class Parameter:
     take as input.
     """
 
-    default_metadata = {}
-
+    default_metadata = {
+        'widget_wrapper': 'processing.gui.wrappers.BasicWidgetWrapper'
+    }
+    
     def __init__(self, name='', description='', default=None, optional=False,
                  metadata={}):
         self.name = name
@@ -870,6 +872,11 @@ class ParameterNumber(Parameter):
 
 
 class ParameterRange(Parameter):
+    
+    default_metadata = {
+        'widget_wrapper': 'processing.gui.wrappers.BasicWidgetWrapper'
+    }
+
 
     def __init__(self, name='', description='', default=None, optional=False):
         Parameter.__init__(self, name, description, default, optional)
@@ -1461,6 +1468,10 @@ class ParameterVector(ParameterDataObject):
 
 class ParameterGeometryPredicate(Parameter):
 
+    default_metadata = {
+        'widget_wrapper': 'processing.gui.wrappers.BasicWidgetWrapper'
+    }
+
     predicates = ('intersects',
                   'contains',
                   'disjoint',

python/plugins/processing/gui/wrappers.py

@@ -17,6 +17,7 @@
 *                                                                         *
 ***************************************************************************
 """
+from gui.GeometryPredicateSelectionPanel import GeometryPredicateSelectionPanel
 
 __author__ = 'Arnaud Morvan'
 __date__ = 'May 2016'
@@ -131,6 +132,17 @@ class WidgetWrapper(QObject):
     def refresh(self):
         pass
 
+class BasicWidgetWrapper(WidgetWrapper):
+
+    def createWidget(self):
+        return QLineEdit()
+    
+    def setValue(self, value):
+        self.widget.setText(value)
+
+    def value(self):
+        return self.widget.text()
+
 
 class BooleanWidgetWrapper(WidgetWrapper):
 
@@ -792,3 +804,14 @@ class TableFieldWidgetWrapper(WidgetWrapper):
                     self.widget.addItem(self.tr(self.NOT_SET))
                 self.widget.addItems(self.getFields(layer, wrapper.param.datatype))
                 
+
+def GeometryPredicateWidgetWrapper(WidgetWrapper):
+    
+    def createWidget(self):
+        return GeometryPredicateSelectionPanel()
+    
+    def setValue(self, value):
+        self.widget.setValue(value)
+        
+    def value(self):
+        return self.widget.value()