Class: QgsEditorWidgetWrapper¶
- class qgis.gui.QgsEditorWidgetWrapper¶
Bases:
QgsWidgetWrapper
Manages an editor widget Widget and wrapper share the same parent
A wrapper controls one attribute editor widget and is able to create a default widget or use a pre-existent widget. It is able to set the widget to the value implied by a field of a vector layer, or return the value it currently holds. Every time it is changed it has to emit a valueChanged signal. If it fails to do so, there is no guarantee that the changed status of the widget will be saved.
It can also handle additional fields of a vector layer and would set the widget for their corresponding values and emit valuesChanged signal.
QgsEditorWidgetWrapper(vl:
QgsVectorLayer
, fieldIdx: int, editor: QWidget = None, parent: QWidget = None) Create a new widget wrapper- Parameters
vl – The layer on which the field is
fieldIdx – The field which will be controlled
editor – An editor widget. Can be
None
if one should be autogenerated.parent –
A parent widget for this widget wrapper and the created widget.
Methods
Will be used to access the widget's values for potential additional fields handled by the widget
Returns the list of additional fields which the editor handles
Returns the reason why a constraint check has failed (or an empty string if constraint check was successful).
Returns the constraint result, which is the current result of the constraint on the widget influencing its visualization.
Returns whether the constraint result is visible.
This method should create a new widget with the provided parent.
Access the default value of the field.
Will call the
value()
method to determine the emitted valueAccess the field.
Access the field index.
The feature currently being edited, in its current state
Will return a wrapper for a given widget
This method should initialize the editor widget with runtime data.
Returns
True
if the widget is preventing the feature from being committed.Check if the given widget or one of its parent is a QTableView.
Gets the current constraint status.
Is called in embedded form widgets when an
attribute
value
in the parent form has changed.Sets whether the constraint result is visible.
Is used to enable or disable the edit functionality of the managed widget.
Will be called when the feature changes
Set the feature currently being edited to
feature
Update the feature currently being edited by changing its attribute
attributeName
toattributeValue
Add a hint text on the widget
Is called when the value of the widget needs to be changed.
Is called when the value of the widget or additional field values needs to be changed.
Sets the widget to display in an indeterminate "mixed value" state.
Update constraint.
This should update the widget with a visual cue if a constraint status changed.
Will be used to access the widget's value.
Signals
Emit this signal when the constraint result visibility changed.
Emit this signal when the constraint status changed.
Emit this signal, whenever the value changed.
Emit this signal, whenever the value changed.
Attributes
- class ConstraintResult¶
Bases:
int
- ConstraintResultFailHard = 1¶
- ConstraintResultFailSoft = 2¶
- ConstraintResultPass = 0¶
- additionalFieldValues(self) List[Any] ¶
Will be used to access the widget’s values for potential additional fields handled by the widget
- Return type
List[Any]
- Returns
A map of additional field names with their corresponding values
See also
New in version 3.10.
- additionalFields(self) List[str] ¶
Returns the list of additional fields which the editor handles
New in version 3.10.
- Return type
List[str]
- childEvent(self, QChildEvent)¶
- connectNotify(self, QMetaMethod)¶
- constraintFailureReason(self) str ¶
Returns the reason why a constraint check has failed (or an empty string if constraint check was successful).
See also
New in version 3.0.
- Return type
str
- constraintResult(self) QgsEditorWidgetWrapper.ConstraintResult ¶
Returns the constraint result, which is the current result of the constraint on the widget influencing its visualization.
New in version 3.0.
- Return type
- constraintResultVisible(self) bool ¶
Returns whether the constraint result is visible.
Returns
True
if the constraint result will be visualized on the widget (with color). This will be disabled when the form is not editable.New in version 3.0.
- Return type
bool
- constraintResultVisibleChanged¶
Emit this signal when the constraint result visibility changed. [signal]
- Parameters
visible (bool) –
- constraintStatusChanged¶
Emit this signal when the constraint status changed. constraintStatusChanged
- Parameters
constraint (str) – represented as a string
desc (str) – is the constraint description
err (str) – the error represented as a string. Empty if none.
status (QgsEditorWidgetWrapper.ConstraintResult) – [signal]
- createWidget(self, parent: QWidget) QWidget ¶
This method should create a new widget with the provided parent. This will only be called if the form did not already provide a widget, so it is not guaranteed to be called! You should not do initialization stuff, which also has to be done for custom editor widgets inside this method. Things like filling comboboxes and assigning other data which will also be used to make widgets on forms created in the QtDesigner usable should be assigned in
initWidget()
.- Parameters
parent – You should set this parent on the created widget.
- Returns
A new widget
- customEvent(self, QEvent)¶
- defaultValue(self) Any ¶
Access the default value of the field.
- Return type
Any
- Returns
the default value of the field
See also
layer()
- disconnectNotify(self, QMetaMethod)¶
- field(self) QgsField ¶
Access the field.
- Return type
- Returns
The field you are working on
See also
layer()
- fieldIdx(self) int ¶
Access the field index.
- Return type
int
- Returns
The index of the field you are working on
See also
layer()
- formFeature(self) QgsFeature ¶
The feature currently being edited, in its current state
- Return type
- Returns
the feature currently being edited, in its current state
New in version 3.2.
- fromWidget(widget: QWidget) QgsEditorWidgetWrapper ¶
Will return a wrapper for a given widget
- Parameters
widget (QWidget) – The widget which was created by a wrapper
- Return type
- Returns
The wrapper for the widget or
None
- initWidget(self, editor: QWidget)¶
This method should initialize the editor widget with runtime data. Fill your comboboxes here.
- Parameters
editor – The widget which will represent this attribute editor in a form.
- isBlockingCommit(self) bool ¶
Returns
True
if the widget is preventing the feature from being committed. This may beTrue
as a result of attribute values failing enforced field constraints.See also
New in version 3.0.
- Return type
bool
- isInTable(parent: QWidget) bool ¶
Check if the given widget or one of its parent is a QTableView.
- Parameters
parent (QWidget) – the widget to check
- Return type
bool
- Returns
True
if yes
- isSignalConnected(self, QMetaMethod) bool ¶
- isValidConstraint(self) bool ¶
Gets the current constraint status.
- Return type
bool
- Returns
True
if the constraint is valid or if there’s no constraint,False
otherwise
See also
See also
New in version 2.16.
- parentFormValueChanged(self, attribute: str, value: Any)¶
Is called in embedded form widgets when an
attribute
value
in the parent form has changed.The default implementations does nothing. Subclasses should reimplement this method to notify the form widgets that something has changed in case they have filter expressions that depend on the parent form scope.
New in version 3.14.
- Parameters
attribute (str) –
value (Any) –
- receivers(self, PYQT_SIGNAL) int ¶
- sender(self) QObject ¶
- senderSignalIndex(self) int ¶
- setConstraintResultVisible(self, constraintResultVisible: bool)¶
Sets whether the constraint result is visible.
Controls if the constraint result should be visualized on the widget (with color). This will be disabled when the form is not editable.
- Parameters
constraintResultVisible (bool) – if constraintResult should be displayed (mostly editable status)
New in version 3.0.
- setEnabled(self, enabled: bool)¶
Is used to enable or disable the edit functionality of the managed widget. By default this will enable or disable the whole widget
- Parameters
enabled (bool) – Enable or Disable?
- setFeature(self, feature: QgsFeature)¶
Will be called when the feature changes
Is forwarded to the slot
setValues()
- Parameters
feature (QgsFeature) – The new feature
- setFormFeature(self, feature: QgsFeature)¶
Set the feature currently being edited to
feature
New in version 3.2.
- Parameters
feature (QgsFeature) –
- setFormFeatureAttribute(self, attributeName: str, attributeValue: Any) bool ¶
Update the feature currently being edited by changing its attribute
attributeName
toattributeValue
- Return type
bool
- Returns
bool
True
on success
New in version 3.2.
- Parameters
attributeName (str) –
attributeValue (Any) –
- setHint(self, hintText: str)¶
Add a hint text on the widget
- Parameters
hintText (str) – The hint text to display
New in version 3.0.
- setValue(self, value: Any)¶
Is called when the value of the widget needs to be changed. Updates the widget representation to reflect the new value.
- Parameters
value (Any) – The new value of the attribute
Deprecated since version QGIS: 3.10
- setValues(self, value: Any, additionalValues: Iterable[Any])¶
Is called when the value of the widget or additional field values needs to be changed. Updates the widget representation to reflect the new values.
New in version 3.10.
- Parameters
value (Any) –
additionalValues (Iterable[Any]) –
- showIndeterminateState(self)¶
Sets the widget to display in an indeterminate “mixed value” state.
New in version 2.16.
- timerEvent(self, QTimerEvent)¶
- updateConstraint(self, featureContext: QgsFeature, constraintOrigin: QgsFieldConstraints.ConstraintOrigin = QgsFieldConstraints.ConstraintOriginNotSet)¶
Update constraint.
- Parameters
featureContext (QgsFeature) – the feature to use to evaluate the constraint
constraintOrigin (QgsFieldConstraints.ConstraintOrigin = QgsFieldConstraints.ConstraintOriginNotSet) – optional origin for constraints to check. This can be used to limit the constraints tested to only provider or layer based constraints.
New in version 2.16.
updateConstraint(self, layer:
QgsVectorLayer
, index: int, feature:QgsFeature
, constraintOrigin: QgsFieldConstraints.ConstraintOrigin = QgsFieldConstraints.ConstraintOriginNotSet) Update constraint on a feature coming from a specific layer.- Parameters
layer – The vector layer where the feature is defined
index – The index of the field to check
feature – The feature to use to evaluate the constraint
constraintOrigin – Optional origin for constraints to check. This can be used to limit the constraints tested to only provider or layer based constraints.
New in version 3.0.
- updateConstraintWidgetStatus(self)¶
This should update the widget with a visual cue if a constraint status changed.
By default a stylesheet will be applied on the widget that changes the background color to red.
This can be overwritten in subclasses to allow individual widgets to change the visual cue.
New in version 2.16.
- value(self) Any ¶
Will be used to access the widget’s value. Read the value from the widget and return it properly formatted to be saved in the attribute.
If an invalid variant is returned this will be interpreted as no change. Be sure to return a NULL QVariant if it should be set to NULL.
- Return type
Any
- Returns
The current value the widget represents
- valueChanged¶
Emit this signal, whenever the value changed.
- Parameters
value (Any) – The new value
Deprecated since version QGIS: 3.10 use valuesChanged signal instead [signal]
- valuesChanged¶
Emit this signal, whenever the value changed. It will also return the values for the additional fields handled by the widget
- Parameters
value (Any) – The new value
additionalFieldValues (Iterable[Any] = []) – A map of additional field names with their corresponding values
New in version 3.10: [signal]