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

Inheritance diagram of qgis.gui.QgsSearchWidgetWrapper

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() Any

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

Return type:

Any

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() Any

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

Return type:

Any

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.