Class: QgsSearchWidgetWrapper¶

Shows a search widget on a filter form.

Note

This is an abstract class, with methods which must be implemented by a subclass.

The following methods must be implemented: applyDirectly(), QgsWidgetWrapper.createWidget(), expression(), setExpression(), QgsWidgetWrapper.valid()

Class Hierarchy¶

Base classes¶

`QgsWidgetWrapper`	Manages an editor widget.
QObject

Subclasses¶

`QgsCheckboxSearchWidgetWrapper`	Wraps a checkbox edit widget for searching.
`QgsDateTimeSearchWidgetWrapper`	Wraps a date/time edit widget for searching.
`QgsDefaultSearchWidgetWrapper`	Wraps a search widget.
`QgsRelationAggregateSearchWidgetWrapper`	Search widget for the children of a relation.
`QgsRelationReferenceSearchWidgetWrapper`	Wraps a relation reference search widget.
`QgsValueMapSearchWidgetWrapper`	Wraps a value map search widget.
`QgsValueRelationSearchWidgetWrapper`	Wraps a value relation search widget.

Abstract Methods

`applyDirectly`	If this is `True`, then this search widget should take effect directly when its expression changes
`expression`	Will be used to access the widget's value.
`setExpression`	Set the expression which is currently used as filter for this widget.

Methods

`aggregate`	If in AggregateSearch mode, which aggregate should be used to construct the filter expression.
`clearExpression`	clears the expression to search for all features
`createFieldIdentifier`	Gets a field name or expression to use as field comparison.
`fieldIndex`	Returns the field index
`setAggregate`	If in AggregateSearch mode, which aggregate should be used to construct the filter expression.

Virtual Methods

In PyQGIS, only methods marked as virtual can be safely overridden in a Python subclass of QgsSearchWidgetWrapper. See the FAQ for more details.

`clearWidget`	Clears the widget's current value and resets it back to the default state
`createExpression`	Creates a filter expression based on the current state of the search widget and the specified filter flags.
`defaultFlags`	Returns the filter flags which should be set by default for the search widget.
`setEnabled`	Toggles whether the search widget is enabled or disabled.
`supportedFlags`	Returns filter flags supported by the search widget.

Static Methods

`exclusiveFilterFlags`	Returns a list of exclusive filter flags, which cannot be combined with other flags (e.g., EqualTo/NotEqualTo)
`nonExclusiveFilterFlags`	Returns a list of non-exclusive filter flags, which can be combined with other flags (e.g., CaseInsensitive)
`toString`	Returns a translated string representing a filter flag.

Signals

`expressionChanged`	Emitted whenever the expression changes
`valueChanged`	Emitted when a user changes the value of the search widget.
`valueCleared`	Emitted when a user changes the value of the search widget back to an empty, default state.

Attributes

`Between`
`CaseInsensitive`
`Contains`
`DoesNotContain`
`EndsWith`
`EqualTo`
`GreaterThan`
`GreaterThanOrEqualTo`
`IsNotBetween`
`IsNotNull`
`IsNull`
`LessThan`
`LessThanOrEqualTo`
`NotEqualTo`
`StartsWith`

class qgis.gui.QgsSearchWidgetWrapper[source]¶

Bases: QgsWidgetWrapper

__init__(vl: QgsVectorLayer | None, fieldIdx: int, parent: QWidget | None = None)

Create a new widget wrapper

Parameters:

vl (Optional[QgsVectorLayer]) – The layer on which the field is
fieldIdx (int) – The field which will be controlled
parent (Optional[QWidget] = None) – A parent widget for this widget wrapper and the created widget.

Between = 128¶

CaseInsensitive = 256¶

Contains = 512¶

DoesNotContain = 1024¶

EndsWith = 32768¶

EqualTo = 2¶

class FilterFlag¶: Bases: int

class FilterFlags¶
class FilterFlags(f: QgsSearchWidgetWrapper.FilterFlags | QgsSearchWidgetWrapper.FilterFlag)
class FilterFlags(a0: QgsSearchWidgetWrapper.FilterFlags): Bases: object

GreaterThan = 8¶

GreaterThanOrEqualTo = 32¶

IsNotBetween = 4096¶

IsNotNull = 8192¶

IsNull = 2048¶

LessThan = 16¶

LessThanOrEqualTo = 64¶

NotEqualTo = 4¶

StartsWith = 16384¶

aggregate(self) → str[source]¶

If in AggregateSearch mode, which aggregate should be used to construct the filter expression. Is a Null String if none.

Return type:: str

abstract applyDirectly(self) → bool[source]¶

If this is True, then this search widget should take effect directly when its expression changes

Return type:: bool

clearExpression(self)[source]¶: clears the expression to search for all features

virtual clearWidget(self)[source]¶: Clears the widget’s current value and resets it back to the default state

virtual createExpression(self, flags: QgsSearchWidgetWrapper.FilterFlags | QgsSearchWidgetWrapper.FilterFlag) → str[source]¶

Creates a filter expression based on the current state of the search widget and the specified filter flags.

Parameters:: flags (Union[QgsSearchWidgetWrapper.FilterFlags, QgsSearchWidgetWrapper.FilterFlag]) – filter flags
Return type:: str
Returns:: filter expression

createFieldIdentifier(self) → str[source]¶

Gets a field name or expression to use as field comparison. If in SearchMode returns a quoted field identifier. If in AggregateSearchMode returns an appropriate aggregate expression.

Return type:: str

virtual defaultFlags(self) → QgsSearchWidgetWrapper.FilterFlags[source]¶

Returns the filter flags which should be set by default for the search widget.

See also

supportedFlags()

Return type:: QgsSearchWidgetWrapper.FilterFlags

static exclusiveFilterFlags() → List[QgsSearchWidgetWrapper.FilterFlag]¶

Returns a list of exclusive filter flags, which cannot be combined with other flags (e.g., EqualTo/NotEqualTo)

See also

nonExclusiveFilterFlags()

Return type:: List[QgsSearchWidgetWrapper.FilterFlag]

abstract expression(self) → str[source]¶

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:: str
Returns:: The current value the widget represents

signal expressionChanged(exp: str)[source]¶

Emitted whenever the expression changes

Parameters:: exp (str) – The new search expression

fieldIndex(self) → int[source]¶

Returns the field index

Added in version 3.10.

Return type:: int

static nonExclusiveFilterFlags() → List[QgsSearchWidgetWrapper.FilterFlag]¶

Returns a list of non-exclusive filter flags, which can be combined with other flags (e.g., CaseInsensitive)

See also

exclusiveFilterFlags()

Return type:: List[QgsSearchWidgetWrapper.FilterFlag]

setAggregate(self, aggregate: str | None)[source]¶

If in AggregateSearch mode, which aggregate should be used to construct the filter expression. Is a Null String if none.

Parameters:: aggregate (Optional[str])

virtual setEnabled(self, enabled: bool)[source]¶

Toggles whether the search widget is enabled or disabled.

Parameters:: enabled (bool) – set to True to enable widget

abstract setExpression(self, expression: str | None)[source]¶

Set the expression which is currently used as filter for this widget.

Parameters:: expression (Optional[str])

virtual supportedFlags(self) → QgsSearchWidgetWrapper.FilterFlags[source]¶

Returns filter flags supported by the search widget.

See also

defaultFlags()

Return type:: QgsSearchWidgetWrapper.FilterFlags

static toString(flag: QgsSearchWidgetWrapper.FilterFlag) → str[source]¶

Returns a translated string representing a filter flag.

Parameters:: flag (QgsSearchWidgetWrapper.FilterFlag) – flag to convert to string
Return type:: str

signal valueChanged[source]¶: Emitted when a user changes the value of the search widget.

signal valueCleared[source]¶: Emitted when a user changes the value of the search widget back to an empty, default state.