#include <hikogui/widgets/checkbox_widget.hpp>

Inheritance diagram for v1::checkbox_widget:

Public Types
using	super = abstract_button_widget

using	delegate_type = typename super::delegate_type

Public Types inherited from v1::abstract_button_widget
using	super = widget

using	delegate_type = button_delegate

Public Member Functions
	checkbox_widget (gui_window &window, widget *parent, std::weak_ptr< delegate_type > delegate) noexcept
	Construct a checkbox widget.

template<typename Value , typename... Args> requires (not std::is_convertible_v<Value, weak_or_unique_ptr<delegate_type>>)
	checkbox_widget (gui_window &window, widget *parent, Value &&value, Args &&...args) noexcept
	Construct a checkbox widget with a default button delegate.

Public Member Functions inherited from v1::abstract_button_widget
template<typename Label >
void	set_label (Label const &rhs) noexcept
	Set on/off/other labels of the button to the same value.

button_state	state () const noexcept
	Get the current state of the button.

Public Member Functions inherited from v1::widget
	widget (gui_window &window, widget *parent) noexcept

	widget (const widget &)=delete

widget &	operator= (const widget &)=delete

	widget (widget &&)=delete

widget &	operator= (widget &&)=delete

bool	is_gui_thread () const noexcept

hi::theme const &	theme () const noexcept
	Get the theme.

hi::font_book &	font_book () const noexcept
	Get the font book.

virtual hitbox	hitbox_test_from_parent (point3 position) const noexcept
	Call hitbox_test from a parent widget.

virtual hitbox	hitbox_test_from_parent (point3 position, hitbox sibling_hitbox) const noexcept
	Call hitbox_test from a parent widget.

widget_constraints const &	constraints () const noexcept

widget_layout const &	layout () const noexcept
	Get the current layout for this widget.

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

void	request_relayout () const noexcept
	Request the window to be relayout on the next frame.

void	request_reconstrain () const noexcept
	Request the window to be reconstrain on the next frame.

void	request_resize () const noexcept
	Request the window to be resize based on the preferred size of the widgets.

virtual bool	handle_event (std::vector< command > const &commands) noexcept

virtual bool	handle_command_recursive (command command, std::vector< widget const * > const &reject_list=std::vector< widget const * >{}) noexcept
	Handle command recursive.

virtual bool	handle_event (keyboard_event const &event) noexcept
	Handle keyboard event.

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

widget const *	find_first_widget (keyboard_focus_group group) const noexcept

widget const *	find_last_widget (keyboard_focus_group group) const noexcept

bool	is_first (keyboard_focus_group group) const noexcept
	Is this widget the first widget in the parent container.

bool	is_last (keyboard_focus_group group) const noexcept
	Is this widget the last widget in the parent container.

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

void	scroll_to_show () noexcept
	Scroll to show the important part of the widget.

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

virtual color	foreground_color () const noexcept

virtual color	focus_color () const noexcept

virtual color	accent_color () const noexcept

virtual color	label_color () const noexcept

Additional Inherited Members
Data Fields inherited from v1::abstract_button_widget
observable< label >	on_label = tr("on")
	The label to show when the button is in the 'on' state.

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

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

observable< alignment >	label_alignment
	The alignment of the on/off/other label.

notifier< void()>	pressed

Data Fields inherited from v1::widget
gui_window &	window
	Convenient reference to the Window.

widget *const	parent
	Pointer to the parent widget.

std::string	id
	A name of widget, should be unique between siblings.

observable< bool >	enabled = true
	The widget is enabled.

observable< bool >	visible = true
	The widget is visible.

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

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

int	semantic_layer
	The draw layer of the widget.

int	logical_layer
	The logical layer of the widget.

Detailed Description

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'.

    observable<int> value = 0;
 
    auto &cb = window->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() [1/2]

v1::checkbox_widget::checkbox_widget	(	gui_window &	window,
		widget *	parent,
		std::weak_ptr< delegate_type >	delegate )

noexcept

Construct a checkbox widget.

Parameters

window	The window that this widget belongs to.
parent	The parent widget that owns this checkbox widget.
delegate	The delegate to use to manage the state of the checkbox button.

◆ checkbox_widget() [2/2]

template<typename Value , typename... Args>
requires (not std::is_convertible_v<Value, weak_or_unique_ptr<delegate_type>>)

v1::checkbox_widget::checkbox_widget	(	gui_window &	window,
		widget *	parent,
		Value &&	value,
		Args &&...	args )

inlinenoexcept

Construct a checkbox widget with a default button delegate.

See also: default_button_delegate

Parameters

window	The window that this widget belongs to.
parent	The parent widget that owns this checkbox widget.
value	The value or `observable` value which represents the state of the checkbox.
args	An optional on-value, followed by an optional off-value. These two values are used to determine which value yields an on/off state.

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

hikogui/src/hikogui/widgets/checkbox_widget.hpp

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ checkbox_widget() [1/2]

◆ checkbox_widget() [2/2]