Gtk.Adjustment¶

Subclasses:	None

Methods¶

Inherited:	GObject.Object (37)
Structs:	GObject.ObjectClass (5)

class	`new` (value, lower, upper, step_increment, page_increment, page_size)
	`changed` ()
	`clamp_page` (lower, upper)
	`configure` (value, lower, upper, step_increment, page_increment, page_size)
	`get_lower` ()
	`get_minimum_increment` ()
	`get_page_increment` ()
	`get_page_size` ()
	`get_step_increment` ()
	`get_upper` ()
	`get_value` ()
	`set_lower` (lower)
	`set_page_increment` (page_increment)
	`set_page_size` (page_size)
	`set_step_increment` (step_increment)
	`set_upper` (upper)
	`set_value` (value)
	`value_changed` ()

Virtual Methods¶

Inherited:	GObject.Object (7)

	`do_changed` ()
	`do_value_changed` ()

Properties¶

Name	Type	Flags	Short Description
`lower`	`float`	r/w	The minimum value of the adjustment
`page-increment`	`float`	r/w	The page increment of the adjustment
`page-size`	`float`	r/w	The page size of the adjustment
`step-increment`	`float`	r/w	The step increment of the adjustment
`upper`	`float`	r/w	The maximum value of the adjustment
`value`	`float`	r/w	The value of the adjustment

Signals¶

Inherited:	GObject.Object (1)

Name	Short Description
`changed`	Emitted when one or more of the `Gtk.Adjustment` properties have been changed, other than the `Gtk.Adjustment` `:value` property.
`value-changed`	Emitted when the `Gtk.Adjustment` `:value` property has been changed.

Fields¶

Inherited:	GObject.Object (1)

Name	Type	Access	Description
parent_instance	`GObject.InitiallyUnowned`	r

Class Details¶

class Gtk.Adjustment(*args, **kwargs)¶

Bases:	`GObject.InitiallyUnowned`
Abstract:	No
Structure:	`Gtk.AdjustmentClass`

The Gtk.Adjustment object represents a value which has an associated lower and upper bound, together with step and page increments, and a page size. It is used within several GTK+ widgets, including Gtk.SpinButton, Gtk.Viewport, and Gtk.Range (which is a base class for Gtk.Scrollbar and Gtk.Scale).

The Gtk.Adjustment object does not update the value itself. Instead it is left up to the owner of the Gtk.Adjustment to control the value.

classmethod new(value, lower, upper, step_increment, page_increment, page_size)[source]¶

Parameters:	value (`float`) – the initial value lower (`float`) – the minimum value upper (`float`) – the maximum value step_increment (`float`) – the step increment page_increment (`float`) – the page increment page_size (`float`) – the page size
Returns:	a new `Gtk.Adjustment`
Return type:	`Gtk.Adjustment`

Creates a new Gtk.Adjustment.

changed()[source]¶: Emits a Gtk.Adjustment ::changed signal from the Gtk.Adjustment. This is typically called by the owner of the Gtk.Adjustment after it has changed any of the Gtk.Adjustment properties other than the value.

Deprecated since version 3.18: GTK+ emits Gtk.Adjustment ::changed itself whenever any of the properties (other than value) change

clamp_page(lower, upper)[source]¶

Parameters:	lower (`float`) – the lower value upper (`float`) – the upper value

Updates the Gtk.Adjustment :value property to ensure that the range between lower and upper is in the current page (i.e. between Gtk.Adjustment :value and Gtk.Adjustment :value + Gtk.Adjustment :page-size). If the range is larger than the page size, then only the start of it will be in the current page.

A Gtk.Adjustment ::value-changed signal will be emitted if the value is changed.

configure(value, lower, upper, step_increment, page_increment, page_size)[source]¶

Parameters:	value (`float`) – the new value lower (`float`) – the new minimum value upper (`float`) – the new maximum value step_increment (`float`) – the new step increment page_increment (`float`) – the new page increment page_size (`float`) – the new page size

Sets all properties of the adjustment at once.

Use this function to avoid multiple emissions of the Gtk.Adjustment ::changed signal. See Gtk.Adjustment.set_lower() for an alternative way of compressing multiple emissions of Gtk.Adjustment ::changed into one.

New in version 2.14.

get_lower()[source]¶

Returns:	The current minimum value of the adjustment
Return type:	`float`

Retrieves the minimum value of the adjustment.

New in version 2.14.

get_minimum_increment()[source]¶

Returns:	the minimum increment of self
Return type:	`float`

Gets the smaller of step increment and page increment.

New in version 3.2.

get_page_increment()[source]¶

Returns:	The current page increment of the adjustment
Return type:	`float`

Retrieves the page increment of the adjustment.

New in version 2.14.

get_page_size()[source]¶

Returns:	The current page size of the adjustment
Return type:	`float`

Retrieves the page size of the adjustment.

New in version 2.14.

get_step_increment()[source]¶

Returns:	The current step increment of the adjustment.
Return type:	`float`

Retrieves the step increment of the adjustment.

New in version 2.14.

get_upper()[source]¶

Returns:	The current maximum value of the adjustment
Return type:	`float`

Retrieves the maximum value of the adjustment.

New in version 2.14.

get_value()[source]¶

Returns:	The current value of the adjustment
Return type:	`float`

Gets the current value of the adjustment. See Gtk.Adjustment.set_value().

set_lower(lower)[source]¶

Parameters:	lower (`float`) – the new minimum value

Sets the minimum value of the adjustment.

When setting multiple adjustment properties via their individual setters, multiple Gtk.Adjustment ::changed signals will be emitted. However, since the emission of the Gtk.Adjustment ::changed signal is tied to the emission of the GObject.Object ::notify signals of the changed properties, it’s possible to compress the Gtk.Adjustment ::changed signals into one by calling GObject.Object.freeze_notify() and GObject.Object.thaw_notify() around the calls to the individual setters.

Alternatively, using a single g_object_set() for all the properties to change, or using Gtk.Adjustment.configure() has the same effect of compressing Gtk.Adjustment ::changed emissions.

New in version 2.14.

set_page_increment(page_increment)[source]¶

Parameters:	page_increment (`float`) – the new page increment

Sets the page increment of the adjustment.

See Gtk.Adjustment.set_lower() about how to compress multiple emissions of the Gtk.Adjustment ::changed signal when setting multiple adjustment properties.

New in version 2.14.

set_page_size(page_size)[source]¶

Parameters:	page_size (`float`) – the new page size

Sets the page size of the adjustment.

See Gtk.Adjustment.set_lower() about how to compress multiple emissions of the Gtk.Adjustment ::changed signal when setting multiple adjustment properties.

New in version 2.14.

set_step_increment(step_increment)[source]¶

Parameters:	step_increment (`float`) – the new step increment

Sets the step increment of the adjustment.

See Gtk.Adjustment.set_lower() about how to compress multiple emissions of the Gtk.Adjustment ::changed signal when setting multiple adjustment properties.

New in version 2.14.

set_upper(upper)[source]¶

Parameters:	upper (`float`) – the new maximum value

Sets the maximum value of the adjustment.

Note that values will be restricted by upper - page-size if the page-size property is nonzero.

See Gtk.Adjustment.set_lower() about how to compress multiple emissions of the Gtk.Adjustment ::changed signal when setting multiple adjustment properties.

New in version 2.14.

set_value(value)[source]¶

Parameters:	value (`float`) – the new value

Sets the Gtk.Adjustment value. The value is clamped to lie between Gtk.Adjustment :lower and Gtk.Adjustment :upper.

Note that for adjustments which are used in a Gtk.Scrollbar, the effective range of allowed values goes from Gtk.Adjustment :lower to Gtk.Adjustment :upper - Gtk.Adjustment :page-size.

value_changed()[source]¶: Emits a Gtk.Adjustment ::value-changed signal from the Gtk.Adjustment. This is typically called by the owner of the Gtk.Adjustment after it has changed the Gtk.Adjustment :value property.

Deprecated since version 3.18: GTK+ emits Gtk.Adjustment ::value-changed itself whenever the value changes

do_changed() virtual¶: Emits a Gtk.Adjustment ::changed signal from the Gtk.Adjustment. This is typically called by the owner of the Gtk.Adjustment after it has changed any of the Gtk.Adjustment properties other than the value.

Deprecated since version 3.18: GTK+ emits Gtk.Adjustment ::changed itself whenever any of the properties (other than value) change

do_value_changed() virtual¶: Emits a Gtk.Adjustment ::value-changed signal from the Gtk.Adjustment. This is typically called by the owner of the Gtk.Adjustment after it has changed the Gtk.Adjustment :value property.

Deprecated since version 3.18: GTK+ emits Gtk.Adjustment ::value-changed itself whenever the value changes

Signal Details¶

Gtk.Adjustment.signals.changed(adjustment)¶

Signal Name:	`changed`
Flags:	`RUN_FIRST`, `NO_RECURSE`
Parameters:	adjustment (`Gtk.Adjustment`) – The object which received the signal

Emitted when one or more of the Gtk.Adjustment properties have been changed, other than the Gtk.Adjustment :value property.

Gtk.Adjustment.signals.value_changed(adjustment)¶

Signal Name:	`value-changed`
Flags:	`RUN_FIRST`, `NO_RECURSE`
Parameters:	adjustment (`Gtk.Adjustment`) – The object which received the signal

Emitted when the Gtk.Adjustment :value property has been changed.

Property Details¶

Gtk.Adjustment.props.lower¶

Name:	`lower`
Type:	`float`
Default Value:	`0.0`
Flags:	`READABLE`, `WRITABLE`

The minimum value of the adjustment.

New in version 2.4.

Gtk.Adjustment.props.page_increment¶

Name:	`page-increment`
Type:	`float`
Default Value:	`0.0`
Flags:	`READABLE`, `WRITABLE`

The page increment of the adjustment.

New in version 2.4.

Gtk.Adjustment.props.page_size¶

Name:	`page-size`
Type:	`float`
Default Value:	`0.0`
Flags:	`READABLE`, `WRITABLE`

The page size of the adjustment. Note that the page-size is irrelevant and should be set to zero if the adjustment is used for a simple scalar value, e.g. in a Gtk.SpinButton.

New in version 2.4.

Gtk.Adjustment.props.step_increment¶

Name:	`step-increment`
Type:	`float`
Default Value:	`0.0`
Flags:	`READABLE`, `WRITABLE`

The step increment of the adjustment.

New in version 2.4.

Gtk.Adjustment.props.upper¶

Name:	`upper`
Type:	`float`
Default Value:	`0.0`
Flags:	`READABLE`, `WRITABLE`

The maximum value of the adjustment. Note that values will be restricted by upper - page-size if the page-size property is nonzero.

New in version 2.4.

Gtk.Adjustment.props.value¶

Name:	`value`
Type:	`float`
Default Value:	`0.0`
Flags:	`READABLE`, `WRITABLE`

The value of the adjustment.

New in version 2.4.