188 lines
4.7 KiB
Markdown
188 lines
4.7 KiB
Markdown
**STRUCT**
|
|
|
|
# `CheckButton`
|
|
|
|
A `GtkCheckButton` places a label next to an indicator.
|
|
|
|
|
|
|
|
A `GtkCheckButton` is created by calling either [ctor@Gtk.CheckButton.new]
|
|
or [ctor@Gtk.CheckButton.new_with_label].
|
|
|
|
The state of a `GtkCheckButton` can be set specifically using
|
|
[method@Gtk.CheckButton.set_active], and retrieved using
|
|
[method@Gtk.CheckButton.get_active].
|
|
|
|
# Inconsistent state
|
|
|
|
In addition to "on" and "off", check buttons can be an
|
|
"in between" state that is neither on nor off. This can be used
|
|
e.g. when the user has selected a range of elements (such as some
|
|
text or spreadsheet cells) that are affected by a check button,
|
|
and the current values in that range are inconsistent.
|
|
|
|
To set a `GtkCheckButton` to inconsistent state, use
|
|
[method@Gtk.CheckButton.set_inconsistent].
|
|
|
|
# Grouping
|
|
|
|
Check buttons can be grouped together, to form mutually exclusive
|
|
groups - only one of the buttons can be toggled at a time, and toggling
|
|
another one will switch the currently toggled one off.
|
|
|
|
Grouped check buttons use a different indicator, and are commonly referred
|
|
to as *radio buttons*.
|
|
|
|
|
|
|
|
To add a `GtkCheckButton` to a group, use [method@Gtk.CheckButton.set_group].
|
|
|
|
When the code must keep track of the state of a group of radio buttons, it
|
|
is recommended to keep track of such state through a stateful
|
|
`GAction` with a target for each button. Using the `toggled` signals to keep
|
|
track of the group changes and state is discouraged.
|
|
|
|
# CSS nodes
|
|
|
|
```
|
|
checkbutton[.text-button]
|
|
├── check
|
|
╰── [label]
|
|
```
|
|
|
|
A `GtkCheckButton` has a main node with name checkbutton. If the
|
|
[property@Gtk.CheckButton:label] or [property@Gtk.CheckButton:child]
|
|
properties are set, it contains a child widget. The indicator node
|
|
is named check when no group is set, and radio if the checkbutton
|
|
is grouped together with other checkbuttons.
|
|
|
|
# Accessibility
|
|
|
|
`GtkCheckButton` uses the %GTK_ACCESSIBLE_ROLE_CHECKBOX role.
|
|
|
|
## Properties
|
|
### `updateFunctions`
|
|
|
|
Additional update functions for type extensions.
|
|
|
|
### `appearFunctions`
|
|
|
|
Additional appear functions for type extensions.
|
|
|
|
### `active`
|
|
|
|
If the check button is active.
|
|
|
|
Setting `active` to %TRUE will add the `:checked:` state to both
|
|
the check button and the indicator CSS node.
|
|
|
|
### `child`
|
|
|
|
The child widget.
|
|
|
|
### `inconsistent`
|
|
|
|
If the check button is in an “in between” state.
|
|
|
|
The inconsistent state only affects visual appearance,
|
|
not the semantics of the button.
|
|
|
|
### `label`
|
|
|
|
Text of the label inside the check button, if it contains a label widget.
|
|
|
|
### `useUnderline`
|
|
|
|
If set, an underline in the text indicates that the following
|
|
character is to be used as mnemonic.
|
|
|
|
### `activate`
|
|
|
|
Emitted to when the check button is activated.
|
|
|
|
The `::activate` signal on `GtkCheckButton` is an action signal and
|
|
emitting it causes the button to animate press then release.
|
|
|
|
Applications should never connect to this signal, but use the
|
|
[signal@Gtk.CheckButton::toggled] signal.
|
|
|
|
The default bindings for this signal are all forms of the
|
|
<kbd>␣</kbd> and <kbd>Enter</kbd> keys.
|
|
|
|
### `toggled`
|
|
|
|
Emitted when the buttons's [property@Gtk.CheckButton:active]
|
|
property changes.
|
|
|
|
### `app`
|
|
|
|
The application.
|
|
|
|
### `window`
|
|
|
|
The window.
|
|
|
|
## Methods
|
|
### `init()`
|
|
|
|
Initialize `CheckButton`.
|
|
|
|
### `container(modifiers:)`
|
|
|
|
Get the widget's view storage.
|
|
- Parameter modifiers: The view modifiers.
|
|
- Returns: The view storage.
|
|
|
|
### `update(_:modifiers:updateProperties:)`
|
|
|
|
Update the widget's view storage.
|
|
- Parameters:
|
|
- storage: The view storage.
|
|
- modifiers: The view modifiers.
|
|
- updateProperties: Whether to update the view's properties.
|
|
|
|
### `active(_:)`
|
|
|
|
If the check button is active.
|
|
|
|
Setting `active` to %TRUE will add the `:checked:` state to both
|
|
the check button and the indicator CSS node.
|
|
|
|
### `child(_:)`
|
|
|
|
The child widget.
|
|
|
|
### `inconsistent(_:)`
|
|
|
|
If the check button is in an “in between” state.
|
|
|
|
The inconsistent state only affects visual appearance,
|
|
not the semantics of the button.
|
|
|
|
### `label(_:)`
|
|
|
|
Text of the label inside the check button, if it contains a label widget.
|
|
|
|
### `useUnderline(_:)`
|
|
|
|
If set, an underline in the text indicates that the following
|
|
character is to be used as mnemonic.
|
|
|
|
### `activate(_:)`
|
|
|
|
Emitted to when the check button is activated.
|
|
|
|
The `::activate` signal on `GtkCheckButton` is an action signal and
|
|
emitting it causes the button to animate press then release.
|
|
|
|
Applications should never connect to this signal, but use the
|
|
[signal@Gtk.CheckButton::toggled] signal.
|
|
|
|
The default bindings for this signal are all forms of the
|
|
<kbd>␣</kbd> and <kbd>Enter</kbd> keys.
|
|
|
|
### `toggled(_:)`
|
|
|
|
Emitted when the buttons's [property@Gtk.CheckButton:active]
|
|
property changes.
|