[processing] Add possibility to pass additionnal parameters to widget…

… wrapper

python/plugins/processing/core/parameters.py

@@ -178,14 +178,19 @@ def tr(self, string, context=''):
 
     def wrapper(self, dialog, row=0, col=0):
         wrapper = self.metadata.get('widget_wrapper', None)
+        params = {}
+        # wrapper metadata should be a dict with class key
+        if isinstance(wrapper, dict):
+            params = deepcopy(wrapper)
+            wrapper = params.pop('class')
         # wrapper metadata should be a class path
         if isinstance(wrapper, str):
             tokens = wrapper.split('.')
             mod = __import__('.'.join(tokens[:-1]), fromlist=[tokens[-1]])
             wrapper = getattr(mod, tokens[-1])
         # or directly a class object
         if isclass(wrapper):
-            wrapper = wrapper(self, dialog, row, col)
+            wrapper = wrapper(self, dialog, row, col, **params)
         # or a wrapper instance
         return wrapper
 

python/plugins/processing/gui/wrappers.py

@@ -2,7 +2,7 @@
 
 """
 ***************************************************************************
-    wrappers.py
+    wrappers.py - Standard parameters widget wrappers
     ---------------------
     Date                 : May 2016
     Copyright            : (C) 2016 by Arnaud Morvan, Victor Olaya
@@ -17,8 +17,6 @@
 *                                                                         *
 ***************************************************************************
 """
-from builtins import str
-from builtins import range
 
 
 __author__ = 'Arnaud Morvan'
@@ -101,14 +99,14 @@ class WidgetWrapper(QObject):
 
     widgetValueHasChanged = pyqtSignal(object)
 
-    def __init__(self, param, dialog, row=0, col=0):
+    def __init__(self, param, dialog, row=0, col=0, **kwargs):
         QObject.__init__(self)
         self.param = param
         self.dialog = dialog
         self.row = row
         self.col = col
         self.dialogType = dialogTypes.get(dialog.__class__.__name__, DIALOG_STANDARD)
-        self.widget = self.createWidget()
+        self.widget = self.createWidget(**kwargs)
         if param.default is not None:
             self.setValue(param.default)
 
@@ -123,7 +121,7 @@ def comboValue(self, validator=None, combobox=None):
             return v
         return combobox.currentData()
 
-    def createWidget(self):
+    def createWidget(self, **kwargs):
         pass
 
     def setValue(self, value):