[processing] Allow restricting fields to date/time types

Author: nyalldawson

python/plugins/processing/core/parameters.py

@@ -1339,6 +1339,7 @@ class ParameterTableField(Parameter):
 
     DATA_TYPE_NUMBER = 0
     DATA_TYPE_STRING = 1
+    DATA_TYPE_DATETIME = 2
     DATA_TYPE_ANY = -1
 
     def __init__(self, name='', description='', parent=None, datatype=-1,
@@ -1376,6 +1377,8 @@ def dataType(self):
             return 'numeric'
         elif self.datatype == self.DATA_TYPE_STRING:
             return 'string'
+        elif self.datatype == self.DATA_TYPE_DATETIME:
+            return 'datetime'
         else:
             return 'any'
 
@@ -1397,6 +1400,9 @@ def fromScriptCode(self, line):
             elif definition.lower().strip().startswith('field string'):
                 parent = definition.strip()[len('field string') + 1:]
                 datatype = ParameterTableField.DATA_TYPE_STRING
+            elif definition.lower().strip().startswith('field datetime'):
+                parent = definition.strip()[len('field datetime') + 1:]
+                datatype = ParameterTableField.DATA_TYPE_DATETIME
             else:
                 parent = definition.strip()[len('field') + 1:]
                 datatype = ParameterTableField.DATA_TYPE_ANY

python/plugins/processing/gui/wrappers.py

@@ -1022,7 +1022,8 @@ def createWidget(self):
                     widget.setFilters(QgsFieldProxyModel.Numeric)
                 elif self.param.datatype == ParameterTableField.DATA_TYPE_STRING:
                     widget.setFilters(QgsFieldProxyModel.String)
-
+                elif self.param.datatype == ParameterTableField.DATA_TYPE_DATETIME:
+                    widget.setFilters(QgsFieldProxyModel.Date | QgsFieldProxyModel.Time)
                 return widget
         else:
             widget = QComboBox()
@@ -1067,6 +1068,8 @@ def getFields(self):
         elif self.param.datatype == ParameterTableField.DATA_TYPE_NUMBER:
             fieldTypes = [QVariant.Int, QVariant.Double, QVariant.LongLong,
                           QVariant.UInt, QVariant.ULongLong]
+        elif self.param.datatype == ParameterTableField.DATA_TYPE_DATETIME:
+            fieldTypes = [QVariant.Date, QVariant.Time, QVariant.DateTime]
 
         fieldNames = set()
         for field in self._layer.fields():

python/plugins/processing/modeler/ModelerParameterDefinitionDialog.py

@@ -140,6 +140,7 @@ def setupUi(self):
             self.datatypeCombo.addItem(self.tr('Any'), -1)
             self.datatypeCombo.addItem(self.tr('Number'), 0)
             self.datatypeCombo.addItem(self.tr('String'), 1)
+            self.datatypeCombo.addItem(self.tr('Date/time'), 2)
             self.verticalLayout.addWidget(self.datatypeCombo)
 
             if self.param is not None and self.param.datatype is not None: