Switch

class Switch(**properties: Any)

Superclasses: Widget, InitiallyUnowned, Object

Implemented Interfaces: Accessible, Actionable, Buildable, ConstraintTarget

GtkSwitch is a “light switch” that has two states: on or off.

The user can control which state should be active by clicking the empty area, or by dragging the slider.

GtkSwitch can also express situations where the underlying state changes with a delay. In this case, the slider position indicates the user’s recent change (represented by the active property), while the trough color indicates the present underlying state (represented by the state property).

See state_set for details.

CSS nodes

switch
├── image
├── image
╰── slider

GtkSwitch has four css nodes, the main node with the name switch and subnodes for the slider and the on and off images. Neither of them is using any style classes.

Accessibility

GtkSwitch uses the SWITCH role.

Constructors

class Switch

classmethod new() → Widget

Creates a new GtkSwitch widget.

Methods

class Switch

get_active() → bool

Gets whether the GtkSwitch is in its “on” or “off” state.

get_state() → bool

Gets the underlying state of the GtkSwitch.

set_active(is_active: bool) → None

Changes the state of self to the desired one.

Parameters:

is_active – True if self should be active, and False otherwise

set_state(state: bool) → None

Sets the underlying state of the GtkSwitch.

This function is typically called from a state_set signal handler in order to set up delayed state changes.

See state_set for details.

Parameters:

state – the new state

Properties

class Switch

props.active: bool

Whether the GtkSwitch widget is in its on or off state.

props.state: bool

The backend state that is controlled by the switch.

Applications should usually set the active property, except when indicating a change to the backend state which occurs separately from the user’s interaction.

See state_set for details.

Signals

class Switch.signals

activate() → None

Emitted to animate the switch.

Applications should never connect to this signal, but use the active property.

state_set(state: bool) → bool

Emitted to change the underlying state.

The ::state-set signal is emitted when the user changes the switch position. The default handler calls set_state with the value of state.

To implement delayed state change, applications can connect to this signal, initiate the change of the underlying state, and call set_state when the underlying state change is complete. The signal handler should return True to prevent the default handler from running.

Parameters:

state – the new state of the switch