Scrollable

class Scrollable(*args, **kwargs)

Implementations: ColumnView, GridView, IconView, ListBase, ListView, TextView, TreeView, Viewport

GtkScrollable is an interface for widgets with native scrolling ability.

To implement this interface you should override the hadjustment and vadjustment properties.

Creating a scrollable widget

All scrollable widgets should do the following.

• When a parent widget sets the scrollable child widget’s adjustments, the widget should connect to the value_changed signal. The child widget should then populate the adjustments’ properties as soon as possible, which usually means queueing an allocation right away and populating the properties in the size_allocate implementation.

• Because its preferred size is the size for a fully expanded widget, the scrollable widget must be able to cope with underallocations. This means that it must accept any value passed to its size_allocate implementation.

• When the parent allocates space to the scrollable child widget, the widget must ensure the adjustments’ property values are correct and up to date, for example using configure.

• When any of the adjustments emits the value_changed signal, the scrollable widget should scroll its contents.

Methods

class Scrollable

get_border() → tuple[bool, Border]

Returns the size of a non-scrolling border around the outside of the scrollable.

An example for this would be treeview headers. GTK can use this information to display overlaid graphics, like the overshoot indication, at the right position.

get_hadjustment() → Adjustment | None

Retrieves the GtkAdjustment used for horizontal scrolling.

get_hscroll_policy() → ScrollablePolicy

Gets the horizontal GtkScrollablePolicy.

get_vadjustment() → Adjustment | None

Retrieves the GtkAdjustment used for vertical scrolling.

get_vscroll_policy() → ScrollablePolicy

Gets the vertical GtkScrollablePolicy.

set_hadjustment(hadjustment: Adjustment | None = None) → None

Sets the horizontal adjustment of the GtkScrollable.

Parameters:

hadjustment – a GtkAdjustment

set_hscroll_policy(policy: ScrollablePolicy) → None

Sets the GtkScrollablePolicy.

The policy determines whether horizontal scrolling should start below the minimum width or below the natural width.

Parameters:

policy – the horizontal GtkScrollablePolicy

set_vadjustment(vadjustment: Adjustment | None = None) → None

Sets the vertical adjustment of the GtkScrollable.

Parameters:

vadjustment – a GtkAdjustment

set_vscroll_policy(policy: ScrollablePolicy) → None

Sets the GtkScrollablePolicy.

The policy determines whether vertical scrolling should start below the minimum height or below the natural height.

Parameters:

policy – the vertical GtkScrollablePolicy

Properties

class Scrollable

props.hadjustment: Adjustment

The type of the None singleton.

props.hscroll_policy: ScrollablePolicy

The type of the None singleton.

props.vadjustment: Adjustment

The type of the None singleton.

props.vscroll_policy: ScrollablePolicy

The type of the None singleton.

Virtual Methods

class Scrollable

do_get_border() → tuple[bool, Border]

Returns the size of a non-scrolling border around the outside of the scrollable.

An example for this would be treeview headers. GTK can use this information to display overlaid graphics, like the overshoot indication, at the right position.