#include <hikogui/widgets/checkbox_widget.hpp>

Inheritance diagram for hi::v1::checkbox_widget< Name >:

Public Types
using	super = widget

using	delegate_type = checkbox_delegate

Public Types inherited from hi::v1::widget
using	callback_token = notifier<void()>::callback_token

using	awaiter_type = notifier<void()>::awaiter_type

Public Member Functions
	checkbox_widget (widget *parent, std::shared_ptr< delegate_type > delegate, checkbox_widget_attribute auto &&...attributes) noexcept
	Construct a checkbox widget.

	checkbox_widget (widget *parent, different_from< std::shared_ptr< delegate_type > > auto &&value, checkbox_widget_attribute auto &&...attributes) noexcept
	Construct a checkbox widget with a default button delegate.

template<different_from< std::shared_ptr< delegate_type > > Value, forward_of< observer< observer_decay_t< Value > > > OnValue, checkbox_widget_attribute... Attributes> requires requires { make_default_checkbox_delegate(hi_forward(value), hi_forward(on_value)); }
	checkbox_widget (widget *parent, Value &&value, OnValue &&on_value, Attributes &&...attributes) noexcept
	Construct a checkbox widget with a default button delegate.

template<different_from< std::shared_ptr< delegate_type > > Value, forward_of< observer< observer_decay_t< Value > > > OnValue, forward_of< observer< observer_decay_t< Value > > > OffValue, checkbox_widget_attribute... Attributes> requires requires { make_default_checkbox_delegate(hi_forward(value), hi_forward(on_value), hi_forward(off_value)); }
	checkbox_widget (widget *parent, Value &&value, OnValue &&on_value, OffValue &&off_value, Attributes &&...attributes) noexcept
	Construct a checkbox widget with a default button delegate.

Public Member Functions inherited from hi::v1::widget
	widget (widget *parent) noexcept

	widget (widget const &)=delete

	widget (widget &&)=delete

widget &	operator= (widget &&)=delete

widget &	operator= (widget const &)=delete

generator< widget & >	children (bool include_invisible) noexcept

virtual hitbox	hitbox_test_from_parent (point2 position) const noexcept
	Call hitbox_test from a parent widget.

virtual hitbox	hitbox_test_from_parent (point2 position, hitbox sibling_hitbox) const noexcept
	Call hitbox_test from a parent widget.

void	reset_layout (gfx_surface *new_surface, float new_scale) noexcept
	Reset the layout.

virtual void	layout () noexcept

virtual sub_theme_selector_type	sub_theme_selector () const noexcept

virtual bool	process_event (gui_event const &event) const noexcept

virtual void	request_redraw () const noexcept
	Request the widget to be redrawn on the next frame.

virtual bool	handle_event_recursive (gui_event const &event, std::vector< widget_id > const &reject_list=std::vector< widget_id >{}) noexcept
	Handle command recursive.

virtual widget_id	find_next_widget (widget_id current_keyboard_widget, keyboard_focus_group group, keyboard_focus_direction direction) const noexcept
	Find the next widget that handles keyboard focus.

widget_id	find_first_widget (keyboard_focus_group group) const noexcept

widget_id	find_last_widget (keyboard_focus_group group) const noexcept

bool	is_first (keyboard_focus_group group) const noexcept

bool	is_last (keyboard_focus_group group) const noexcept

virtual void	scroll_to_show (hi::aarectangle rectangle) noexcept
	Scroll to show the given rectangle on the window.

std::vector< widget_id >	parent_chain () const noexcept
	Get a list of parents of a given widget.

virtual bool	is_tab_button () const noexcept
	Check if this widget is a tab-button.

template<forward_of< void()> Callback>
callback_token	subscribe (Callback &&callback, callback_flags flags=callback_flags::synchronous) const noexcept

awaiter_type	operator co_await () const noexcept

Data Fields
std::shared_ptr< delegate_type >	delegate
	The delegate that controls the button widget.

observer< label >	on_label = tr("on")
	The label to show when the button is in the 'on' state.

observer< label >	off_label = tr("off")
	The label to show when the button is in the 'off' state.

observer< label >	other_label = tr("other")
	The label to show when the button is in the 'other' state.

observer< hi::alignment >	alignment = alignment::top_left()
	The alignment of the button and on/off/other label.

Data Fields inherited from hi::v1::widget
widget_id	id = {}
	The numeric identifier of a widget.

widget *	parent = nullptr
	Pointer to the parent widget.

gfx_surface *	surface = nullptr
	The surface this widget is drawn on.

observer< widget_mode >	mode = widget_mode::enabled
	The widget mode.

observer< bool >	hover = false
	Mouse cursor is hovering over the widget.

observer< bool >	clicked = false
	The widget is being clicked by the mouse.

observer< bool >	focus = false
	The widget has keyboard focus.

observer< widget_state >	state = widget_state::off
	The state of the widget.

size_t	semantic_layer = 0_uz
	The draw layer of the widget.

grid_cell	cell

Static Public Attributes
static constexpr auto	prefix = Name / "checkbox"

Detailed Description

template<fixed_string Name = "">
class hi::v1::checkbox_widget< Name >

A GUI widget that permits the user to make a binary choice.

A checkbox is a button with three different states with different visual representation:

on: A check-mark is shown inside the box, and the checkbox_widget::on_label is shown.
off: An empty box is shown, and the checkbox_widget::off_label is shown.
other: A dash is shown inside the box, and the checkbox_widget::other_label is shown.

Each time a user activates the checkbox-button it toggles between the 'on' and 'off' states. If the checkbox is in the 'other' state an activation will switch it to the 'off' state.

A checkbox cannot itself switch state to 'other', this state may be caused by external factors. The canonical example is a tree structure of checkboxes; when child checkboxes have different values from each other the parent checkbox state is set to 'other'.

In the following example we create a checkbox widget on the window which observes value. When the value is 1 the checkbox is 'on', when the value is 2 the checkbox is 'off'.

    observer<int> value = 0;
 
    auto& cb = widget.content().make_widget<checkbox_widget<>>("B1", value, 1, 2);
    cb.on_label = tr("on");
    cb.off_label = tr("off");
    cb.other_label = tr("other");

Constructor & Destructor Documentation

◆ checkbox_widget() [1/4]

template<fixed_string Name = "">

hi::v1::checkbox_widget< Name >::checkbox_widget	(	widget *	parent,
		std::shared_ptr< delegate_type >	delegate,
		checkbox_widget_attribute auto &&...	attributes )

inlinenoexcept

Construct a checkbox widget.

Parameters

parent	The parent widget that owns this checkbox widget.
delegate	The delegate to use to manage the state of the checkbox button.
attributes	Different attributes used to configure the label's on the checkbox button: a `label`, `alignment` or `text_theme`. If one label is passed it will be shown in all states. If two or three labels are passed the labels are shown in on-state, off-state and other-state in that order.

◆ checkbox_widget() [2/4]

template<fixed_string Name = "">

hi::v1::checkbox_widget< Name >::checkbox_widget	(	widget *	parent,
		different_from< std::shared_ptr< delegate_type > > auto &&	value,
		checkbox_widget_attribute auto &&...	attributes )

inlinenoexcept

Construct a checkbox widget with a default button delegate.

See also: default_button_delegate

Parameters

parent	The parent widget that owns this checkbox widget.
value	The value or `observer` value which represents the state of the checkbox.
attributes	Different attributes used to configure the label's on the checkbox button: a `label`, `alignment` or `text_theme`. If one label is passed it will be shown in all states. If two or three labels are passed the labels are shown in on-state, off-state and other-state in that order.

◆ checkbox_widget() [3/4]

template<fixed_string Name = "">

template<different_from< std::shared_ptr< delegate_type > > Value, forward_of< observer< observer_decay_t< Value > > > OnValue, checkbox_widget_attribute... Attributes>
requires requires { make_default_checkbox_delegate(hi_forward(value), hi_forward(on_value)); }

hi::v1::checkbox_widget< Name >::checkbox_widget	(	widget *	parent,
		Value &&	value,
		OnValue &&	on_value,
		Attributes &&...	attributes )

inlinenoexcept

Construct a checkbox widget with a default button delegate.

See also: default_button_delegate

Parameters

parent	The parent widget that owns this checkbox widget.
value	The value or `observer` value which represents the state of the checkbox.
on_value	The on-value. This value is used to determine which value yields an 'on' state.
attributes	Different attributes used to configure the label's on the checkbox button: a `label`, `alignment` or `text_theme`. If one label is passed it will be shown in all states. If two or three labels are passed the labels are shown in on-state, off-state and other-state in that order.

◆ checkbox_widget() [4/4]

template<fixed_string Name = "">

template<different_from< std::shared_ptr< delegate_type > > Value, forward_of< observer< observer_decay_t< Value > > > OnValue, forward_of< observer< observer_decay_t< Value > > > OffValue, checkbox_widget_attribute... Attributes>
requires requires { make_default_checkbox_delegate(hi_forward(value), hi_forward(on_value), hi_forward(off_value)); }

hi::v1::checkbox_widget< Name >::checkbox_widget	(	widget *	parent,
		Value &&	value,
		OnValue &&	on_value,
		OffValue &&	off_value,
		Attributes &&...	attributes )

inlinenoexcept

Construct a checkbox widget with a default button delegate.

See also: default_button_delegate

Parameters

parent	The parent widget that owns this checkbox widget.
value	The value or `observer` value which represents the state of the checkbox.
on_value	The on-value. This value is used to determine which value yields an 'on' state.
off_value	The off-value. This value is used to determine which value yields an 'off' state.
attributes	Different attributes used to configure the label's on the checkbox button: a `label`, `alignment` or `text_theme`. If one label is passed it will be shown in all states. If two or three labels are passed the labels are shown in on-state, off-state and other-state in that order.

Field Documentation

◆ alignment

template<fixed_string Name = "">

observer<hi::alignment> hi::v1::checkbox_widget< Name >::alignment = alignment::top_left()

The alignment of the button and on/off/other label.

◆ delegate

template<fixed_string Name = "">

std::shared_ptr<delegate_type> hi::v1::checkbox_widget< Name >::delegate

The delegate that controls the button widget.

◆ off_label

template<fixed_string Name = "">

observer<label> hi::v1::checkbox_widget< Name >::off_label = tr("off")

The label to show when the button is in the 'off' state.

◆ on_label

template<fixed_string Name = "">

observer<label> hi::v1::checkbox_widget< Name >::on_label = tr("on")

The label to show when the button is in the 'on' state.

◆ other_label

template<fixed_string Name = "">

observer<label> hi::v1::checkbox_widget< Name >::other_label = tr("other")

The label to show when the button is in the 'other' state.

The documentation for this class was generated from the following file:

hikogui/src/hikogui/widgets/checkbox_widget.hpp

Public Types

Public Member Functions

Data Fields

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ checkbox_widget() [1/4]

◆ checkbox_widget() [2/4]

◆ checkbox_widget() [3/4]

◆ checkbox_widget() [4/4]

Field Documentation

◆ alignment

◆ delegate

◆ off_label

◆ on_label

◆ other_label