ListBox#

class ListBox(**properties: Any)#

Superclasses: Widget, InitiallyUnowned, Object

Implemented Interfaces: Accessible, Buildable, ConstraintTarget

Shows a vertical list.

A GtkListBox only contains GtkListBoxRow children. These rows can by dynamically sorted and filtered, and headers can be added dynamically depending on the row content. It also allows keyboard and mouse navigation and selection like a typical list.

Using GtkListBox is often an alternative to GtkTreeView, especially when the list contents has a more complicated layout than what is allowed by a GtkCellRenderer, or when the contents is interactive (i.e. has a button in it).

Although a GtkListBox must have only GtkListBoxRow children, you can add any kind of widget to it via prepend, append and insert and a GtkListBoxRow widget will automatically be inserted between the list and the widget.

GtkListBoxRows can be marked as activatable or selectable. If a row is activatable, row_activated will be emitted for it when the user tries to activate it. If it is selectable, the row will be marked as selected when the user tries to select it.

GtkListBox as GtkBuildable#

The GtkListBox implementation of the GtkBuildable interface supports setting a child as the placeholder by specifying “placeholder” as the “type” attribute of a <child> element. See set_placeholder for info.

Shortcuts and Gestures#

The following signals have default keybindings:

move_cursor
select_all
toggle_cursor_row
unselect_all

CSS nodes#

list[.separators][.rich-list][.navigation-sidebar][.boxed-list]
╰── row[.activatable]

GtkListBox uses a single CSS node named list. It may carry the .separators style class, when the show_separators property is set. Each GtkListBoxRow uses a single CSS node named row. The row nodes get the .activatable style class added when appropriate.

It may also carry the .boxed-list style class. In this case, the list will be automatically surrounded by a frame and have separators.

The main list node may also carry style classes to select the style of list presentation: .rich-list, .navigation-sidebar or .data-table.

Accessibility#

GtkListBox uses the list role and GtkListBoxRow uses the list_item role.

Constructors#

class ListBox

classmethod new() → Widget#: Creates a new GtkListBox container.

Methods#

class ListBox

append(child: Widget) → None#

Append a widget to the list.

If a sort function is set, the widget will actually be inserted at the calculated position.

Parameters:: child – the GtkWidget to add

bind_model(model: ListModel | None = None, create_widget_func: Callable[[Object, Any], Widget] | None = None, user_data: Any = None) → None#

Binds model to box.

If box was already bound to a model, that previous binding is destroyed.

The contents of box are cleared and then filled with widgets that represent items from model. box is updated whenever model changes. If model is None, box is left empty.

It is undefined to add or remove widgets directly (for example, with insert) while box is bound to a model.

Note that using a model is incompatible with the filtering and sorting functionality in GtkListBox. When using a model, filtering and sorting should be implemented by the model.

Parameters:

model – the GListModel to be bound to box
create_widget_func – a function that creates widgets for items or None in case you also passed None as model
user_data – user data passed to create_widget_func

drag_highlight_row(row: ListBoxRow) → None#

Add a drag highlight to a row.

This is a helper function for implementing DnD onto a GtkListBox. The passed in row will be highlighted by setting the DROP_ACTIVE state and any previously highlighted row will be unhighlighted.

The row will also be unhighlighted when the widget gets a drag leave event.

Parameters:: row – a GtkListBoxRow

drag_unhighlight_row() → None#: If a row has previously been highlighted via drag_highlight_row(), it will have the highlight removed.

get_activate_on_single_click() → bool#: Returns whether rows activate on single clicks.

get_adjustment() → Adjustment | None#: Gets the adjustment (if any) that the widget uses to for vertical scrolling.

get_row_at_index(index_: int) → ListBoxRow | None#

Gets the n-th child in the list (not counting headers).

If index_ is negative or larger than the number of items in the list, None is returned.

Parameters:: index – the index of the row

get_row_at_y(y: int) → ListBoxRow | None#

Gets the row at the y position.

Parameters:: y – position

get_selected_row() → ListBoxRow | None#

Gets the selected row, or None if no rows are selected.

Note that the box may allow multiple selection, in which case you should use selected_foreach to find all selected rows.

get_selected_rows() → list[ListBoxRow]#: Creates a list of all selected children.

get_selection_mode() → SelectionMode#: Gets the selection mode of the listbox.

get_show_separators() → bool#: Returns whether the list box should show separators between rows.

get_tab_behavior() → ListTabBehavior#: Returns the behavior of the Tab and Shift+:kbd:Tab keys.

Added in version 4.18.

insert(child: Widget, position: int) → None#

Insert the child into the box at position.

If a sort function is set, the widget will actually be inserted at the calculated position.

If position is -1, or larger than the total number of items in the box, then the child will be appended to the end.

Parameters:

child – the GtkWidget to add
position – the position to insert child in

invalidate_filter() → None#

Update the filtering for all rows.

Call this when result of the filter function on the box is changed due to an external factor. For instance, this would be used if the filter function just looked for a specific search string and the entry with the search string has changed.

invalidate_headers() → None#

Update the separators for all rows.

Call this when result of the header function on the box is changed due to an external factor.

invalidate_sort() → None#

Update the sorting for all rows.

Call this when result of the sort function on the box is changed due to an external factor.

prepend(child: Widget) → None#

Prepend a widget to the list.

If a sort function is set, the widget will actually be inserted at the calculated position.

Parameters:: child – the GtkWidget to add

remove(child: Widget) → None#

Removes a child from box.

Parameters:: child – the child to remove

remove_all() → None#

Removes all rows from box.

This function does nothing if box is backed by a model.

Added in version 4.12.

select_all() → None#: Select all children of box, if the selection mode allows it.

select_row(row: ListBoxRow | None = None) → None#

Make row the currently selected row.

Parameters:: row – The row to select

selected_foreach(func: Callable[[ListBox, ListBoxRow, Any], None], data: Any = None) → None#

Calls a function for each selected child.

Note that the selection cannot be modified from within this function.

Parameters:

func – the function to call for each selected child
data – user data to pass to the function

set_activate_on_single_click(single: bool) → None#

If single is True, rows will be activated when you click on them, otherwise you need to double-click.

Parameters:: single – a boolean

set_adjustment(adjustment: Adjustment | None = None) → None#

Sets the adjustment (if any) that the widget uses to for vertical scrolling.

For instance, this is used to get the page size for PageUp/Down key handling.

In the normal case when the box is packed inside a GtkScrolledWindow the adjustment from that will be picked up automatically, so there is no need to manually do that.

Parameters:: adjustment – the adjustment

set_filter_func(filter_func: Callable[[ListBoxRow, Any], bool] | None = None, user_data: Any = None) → None#

By setting a filter function on the box one can decide dynamically which of the rows to show.

For instance, to implement a search function on a list that filters the original list to only show the matching rows.

The filter_func will be called for each row after the call, and it will continue to be called each time a row changes (via changed) or when invalidate_filter is called.

Note that using a filter function is incompatible with using a model (see bind_model).

Parameters:

filter_func – callback that lets you filter which rows to show
user_data – user data passed to filter_func

set_header_func(update_header: Callable[[ListBoxRow, ListBoxRow | None, Any], None] | None = None, user_data: Any = None) → None#

Sets a header function.

By setting a header function on the box one can dynamically add headers in front of rows, depending on the contents of the row and its position in the list.

For instance, one could use it to add headers in front of the first item of a new kind, in a list sorted by the kind.

The update_header can look at the current header widget using get_header and either update the state of the widget as needed, or set a new one using set_header. If no header is needed, set the header to None.

Note that you may get many calls update_header to this for a particular row when e.g. changing things that don’t affect the header. In this case it is important for performance to not blindly replace an existing header with an identical one.

The update_header function will be called for each row after the call, and it will continue to be called each time a row changes (via changed) and when the row before changes (either by changed on the previous row, or when the previous row becomes a different row). It is also called for all rows when invalidate_headers is called.

Parameters:

update_header – callback that lets you add row headers
user_data – user data passed to update_header

set_placeholder(placeholder: Widget | None = None) → None#

Sets the placeholder widget that is shown in the list when it doesn’t display any visible children.

Parameters:: placeholder – a GtkWidget

set_selection_mode(mode: SelectionMode) → None#

Sets how selection works in the listbox.

Parameters:: mode – The GtkSelectionMode

set_show_separators(show_separators: bool) → None#

Sets whether the list box should show separators between rows.

Parameters:: show_separators – True to show separators

set_sort_func(sort_func: Callable[[ListBoxRow, ListBoxRow, Any], int] | None = None, user_data: Any = None) → None#

Sets a sort function.

By setting a sort function on the box one can dynamically reorder the rows of the list, based on the contents of the rows.

The sort_func will be called for each row after the call, and will continue to be called each time a row changes (via changed) and when invalidate_sort is called.

Note that using a sort function is incompatible with using a model (see bind_model).

Parameters:

sort_func – the sort function
user_data – user data passed to sort_func

set_tab_behavior(behavior: ListTabBehavior) → None#

Sets the behavior of the Tab and Shift+:kbd:Tab keys.

Added in version 4.18.

Parameters:: behavior – the tab behavior

unselect_all() → None#: Unselect all children of box, if the selection mode allows it.

unselect_row(row: ListBoxRow) → None#

Unselects a single row of box, if the selection mode allows it.

Parameters:: row – the row to unselect

Properties#

class ListBox

props.accept_unpaired_release: bool#: Whether to accept unpaired release events.

props.activate_on_single_click: bool#: Determines whether children can be activated with a single click, or require a double-click.

props.selection_mode: SelectionMode#: The selection mode used by the list box.

props.show_separators: bool#: Whether to show separators between rows.

props.tab_behavior: ListTabBehavior#: Behavior of the Tab key

Added in version 4.18.

Signals#

class ListBox.signals

activate_cursor_row() → None#: Emitted when the cursor row is activated.

move_cursor(step: MovementStep, count: int, extend: bool, modify: bool) → None#

Emitted when the user initiates a cursor movement.

The default bindings for this signal come in two variants, the variant with the Shift modifier extends the selection, the variant without the Shift modifier does not. There are too many key combinations to list them all here.

←, →, ↑, ↓ move by individual children
Home, End move to the ends of the box
PgUp, PgDn move vertically by pages

Parameters:

step – the granularity of the move, as a GtkMovementStep
count – the number of step units to move
extend – whether to extend the selection
modify – whether to modify the selection

row_activated(row: ListBoxRow) → None#

Emitted when a row has been activated by the user.

Parameters:: row – the activated row

row_selected(row: ListBoxRow | None = None) → None#

Emitted when a new row is selected, or (with a None row) when the selection is cleared.

When the box is using MULTIPLE, this signal will not give you the full picture of selection changes, and you should use the selected_rows_changed signal instead.

Parameters:: row – the selected row

select_all() → None#

Emitted to select all children of the box, if the selection mode permits it.

This is a keybinding signal.

The default binding for this signal is Ctrl-a.

selected_rows_changed() → None#: Emitted when the set of selected rows changes.

toggle_cursor_row() → None#

Emitted when the cursor row is toggled.

The default bindings for this signal is Ctrl+<kbd>␣</kbd>.

unselect_all() → None#

Emitted to unselect all children of the box, if the selection mode permits it.

This is a keybinding signal.

The default binding for this signal is Ctrl-Shift-a.