Class: QgsFieldModel¶
-
class
qgis.core.
QgsFieldModel
(parent: QObject = None)¶ Bases:
PyQt5.QtCore.QAbstractItemModel
Constructor for
QgsFieldModel
- creates a model to display the fields of a given layer.The
QgsFieldModel
class is a model to display the list of fields of a layer in widgets. If allowed, expressions might be added to the end of the model. It can be associated with aQgsMapLayerModel
to dynamically display a layer and its fields.New in version 2.3.
- Parameters
parent –
-
ExpressionRole
= 259¶
-
ExpressionValidityRole
= 261¶
-
FieldIndexRole
= 258¶
-
FieldNameRole
= 257¶
-
FieldOriginRole
= 263¶
-
class
FieldRoles
¶ Bases:
int
-
FieldTypeRole
= 262¶
-
IsEmptyRole
= 264¶
-
IsExpressionRole
= 260¶
-
allowEmptyFieldName
(self) → bool¶ Returns true if the model allows the empty field (“not set”) choice.
See also
New in version 3.0.
- Return type
bool
-
allowExpression
(self) → bool¶ Returns true if the model allows custom expressions to be created and displayed.
See also
- Return type
bool
-
beginInsertColumns
()¶
-
beginInsertRows
()¶
-
beginMoveColumns
()¶
-
beginMoveRows
()¶
-
beginRemoveColumns
()¶
-
beginRemoveRows
()¶
-
beginResetModel
()¶
-
changePersistentIndex
()¶
-
changePersistentIndexList
()¶
-
childEvent
()¶
-
columnCount
(self, parent: QModelIndex) → int¶ - Parameters
parent (QModelIndex) –
- Return type
int
-
connectNotify
()¶
-
createIndex
()¶
-
customEvent
()¶
-
data
(self, index: QModelIndex, role: int) → Any¶ - Parameters
index (QModelIndex) –
role (int) –
- Return type
Any
-
decodeData
()¶
-
disconnectNotify
()¶
-
encodeData
()¶
-
endInsertColumns
()¶
-
endInsertRows
()¶
-
endMoveColumns
()¶
-
endMoveRows
()¶
-
endRemoveColumns
()¶
-
endRemoveRows
()¶
-
endResetModel
()¶
-
fieldToolTip
(field: QgsField) → str¶ Returns a HTML formatted tooltip string for a
field
, containing details like the field name, alias and type.New in version 3.0.
- Parameters
field (QgsField) –
- Return type
str
-
index
(self, row: int, column: int, parent: QModelIndex = QModelIndex()) → QModelIndex¶ - Parameters
row (int) –
column (int) –
parent (QModelIndex = QModelIndex()) –
- Return type
QModelIndex
-
indexFromName
(self, fieldName: str) → QModelIndex¶ Returns the index corresponding to a given fieldName.
- Parameters
fieldName (str) –
- Return type
QModelIndex
-
isField
(self, expression: str) → bool¶ Returns true if a string represents a field reference, or false if it is an expression consisting of more than direct field reference.
- Parameters
expression (str) –
- Return type
bool
-
isSignalConnected
()¶
-
layer
(self) → QgsVectorLayer¶ Returns the layer associated with the model.
See also
- Return type
-
parent
(self, child: QModelIndex) → QModelIndex¶ - Parameters
child (QModelIndex) –
- Return type
QModelIndex
-
persistentIndexList
()¶
-
receivers
()¶
-
removeExpression
(self)¶ Removes any custom expression from the model.
See also
See also
-
resetInternalData
()¶
-
rowCount
(self, parent: QModelIndex = QModelIndex()) → int¶ - Parameters
parent (QModelIndex = QModelIndex()) –
- Return type
int
-
sender
()¶
-
senderSignalIndex
()¶
-
setAllowEmptyFieldName
(self, allowEmpty: bool)¶ Sets whether an optional empty field (“not set”) option is present in the model.
See also
New in version 3.0.
- Parameters
allowEmpty (bool) –
-
setAllowExpression
(self, allowExpression: bool)¶ Sets whether custom expressions are accepted and displayed in the model.
See also
See also
- Parameters
allowExpression (bool) –
-
setExpression
(self, expression: str)¶ Sets a single expression to be added after the fields at the end of the model.
See also
See also
See also
- Parameters
expression (str) –
-
setLayer
(self, layer: QgsVectorLayer)¶ Set the layer from which fields are displayed.
See also
- Parameters
layer (QgsVectorLayer) –
-
timerEvent
()¶
-
updateModel
(self)¶ Called when the model must be updated.