The box is a generic container for widgets, allowing you to construct layouts.
A box can be instantiated with no children and the children added later:
import toga box = toga.Box('box1') button = toga.Button('Hello world', on_press=button_handler) box.add(button)
To create boxes within boxes, use the children argument:
import toga box_a = toga.Box('box_a') box_b = toga.Box('box_b') box = toga.Box('box', children=[box_a, box_b])
Styling of boxes can be done during instantiation of the Box:
import toga from toga.style import Pack from toga.style.pack import COLUMN box = toga.Box(id='box', style=Pack(direction=COLUMN, padding_top=10))
Styles can be also be updated on an existing instance:
import toga from toga.style import Pack from toga.style.pack import COLUMN box = toga.Box(id='box', style=Pack(direction=COLUMN)) box.style.update(padding_top=10)
- class toga.widgets.box.Box(id=None, style=None, children=None, factory=None)#
This is a Widget that contains other widgets, but has no rendering or interaction of its own.
id (str) – An identifier for this widget.
( (style) – class:~colosseum.CSSNode`): An optional style object. If no style is provided then a new one will be created for the widget.
Widget) – An optional list of child Widgets that will be in this box.
Add the provided widgets as children of this widget.
If a node already has a different parent, it will be moved over. This does nothing if a node already is a child of this node.
ValueErrorif this widget cannot have children.
children – The widgets to add as children of this widget.
- property app#
The App to which this widget belongs.
When setting the app for a widget, all children of this widget will be recursively assigned to the same app.
ValueErrorif the widget is already associated with another app.
- property can_have_children#
Determine if the node can have children.
This does not resolve whether there actually are any children; it only confirms whether children are theoretically allowed.
- property children#
The children of this node. This always returns a list, even if the node is a leaf and cannot have children.
A list of the children for this widget.
- property enabled#
Is the widget currently enabled? i.e., can the user interact with the widget?
Set this widget to have the current input focus.
- property id#
The node identifier. This id can be used to target styling directives.
- insert(index, child)#
Insert a widget as a child of this widget.
If the node already has a parent, ownership of the widget will be transferred.
ValueErrorif this node cannot have children.
index – The position in the list of children where the new widget should be added.
child – The child to insert as a child of this node.
- property parent#
The parent of this node.
The parent of this node. Returns None if this node is the root node.
Refresh the layout and appearance of the tree this node is contained in.
Remove the provided widgets as children of this node.
This does nothing if a given node is not a child of this node.
ValueErrorif this node is a leaf, and cannot have children.
children – The child nodes to remove.
- property root#
The root of the tree containing this node.
The root node. Returns self if this node is the root node.
- property tab_index#
The position of the widget in the focus chain for the window.
- property window#
The window to which this widget belongs.
When setting the window for a widget, all children of this widget will be recursively assigned to the same window.