hi::v1::toggle_widget Class Reference

#include <hikogui/widgets/toggle_widget.hpp>

Inheritance diagram for hi::v1::toggle_widget:

Public Types
using	super = abstract_button_widget
using	delegate_type = typename super::delegate_type
Public Types inherited from hi::v1::abstract_button_widget
using	super = widget
using	delegate_type = button_delegate

Public Member Functions
	toggle_widget (widget *parent, std::shared_ptr< delegate_type > delegate, button_widget_attribute auto &&...attributes) noexcept
	Construct a toggle widget.
template<different_from< std::shared_ptr< delegate_type > > Value, button_widget_attribute... Attributes> requires requires { make_default_toggle_button_delegate(hi_forward(value)); }
	toggle_widget (widget *parent, Value &&value, Attributes &&...attributes) noexcept
	Construct a toggle widget with a default button delegate.
template<different_from< std::shared_ptr< delegate_type > > Value, forward_of< observer< observer_decay_t< Value > > > OnValue, button_widget_attribute... Attributes> requires requires { make_default_toggle_button_delegate(hi_forward(value), hi_forward(on_value)); }
	toggle_widget (widget *parent, Value &&value, OnValue &&on_value, Attributes &&...attributes) noexcept
	Construct a toggle 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, button_widget_attribute... Attributes> requires requires { make_default_toggle_button_delegate(hi_forward(value), hi_forward(on_value), hi_forward(off_value)); }
	toggle_widget (widget *parent, Value &&value, OnValue &&on_value, OffValue &&off_value, Attributes &&...attributes) noexcept
	Construct a toggle widget with a default button delegate.
Public Member Functions inherited from hi::v1::abstract_button_widget
	abstract_button_widget (widget *parent, std::shared_ptr< delegate_type > delegate) noexcept
button_state	state () const noexcept
	Get the current state of the button.
Public Member Functions inherited from hi::v1::widget
	widget (widget *parent) noexcept
	widget (const widget &)=delete
widget &	operator= (const widget &)=delete
	widget (widget &&)=delete
widget &	operator= (widget &&)=delete
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 bool	process_event (gui_event const &event) const noexcept
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 const * > const &reject_list=std::vector< widget const * >{}) noexcept
	Handle command recursive.
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 hi::v1::abstract_button_widget
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< alignment >	alignment
	The alignment of the button and on/off/other label.
observer< semantic_text_style >	text_style = semantic_text_style::label
	The text style to button's label.
notifier< void()>	pressed
Data Fields inherited from hi::v1::widget
widget *	parent
	Pointer to the parent widget.
std::string	id
	A name of widget, should be unique between siblings.
observer< widget_mode >	mode = widget_mode::enabled
	The widget mode.
observer< bool >	hover = false
	Mouse cursor is hovering over the widget.
observer< 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 toggle is very similar to a checkbox_widget. The semantic difference between a checkbox and a toggle is:

• A toggle is immediately active, turning on and off a feature or service at the moment you toggle it.
• A checkbox determines what happens when another action takes place. Or only becomes active after pressing the "Apply" or "Save" button on a form. Or becomes part of a record together with other information to be stored together in a database of some sort.

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

• on: The switch is thrown to the right and is highlighted, and the toggle_widget::on_label is shown.
• off: The switch is thrown to the left and is not highlighted, and the toggle_widget::off_label is shown.
• other: The switch is thrown to the left and is not highlighted, and the toggle_widget::other_label is shown.

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

A toggle cannot itself switch state to 'other', this state may be caused by external factors.

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

    observer<int> value = 0;
 
    auto& tb = window->content().make_widget<toggle_widget>("B1", value, 1, 2);
    tb.on_label = tr("on");
    tb.off_label = tr("off");
    tb.other_label = tr("other");

Constructor & Destructor Documentation

toggle_widget() [1/4]

hi::v1::toggle_widget::toggle_widget ( widget * parent, std::shared_ptr< delegate_type > delegate, button_widget_attribute auto &&... attributes )

inlinenoexcept

Construct a toggle widget.

Parameters

parent	The parent widget that owns this toggle widget.
delegate	The delegate to use to manage the state of the toggle button.
attributes	Different attributes used to configure the label's on the toggle button: a label, alignment or semantic_text_style. 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.

toggle_widget() [2/4]

template<different_from< std::shared_ptr< delegate_type > > Value, button_widget_attribute... Attributes>
requires requires { make_default_toggle_button_delegate(hi_forward(value)); }

hi::v1::toggle_widget::toggle_widget ( widget * parent, Value && value, Attributes &&... attributes )

inlinenoexcept

Construct a toggle widget with a default button delegate.

See also

default_button_delegate

Parameters

parent	The parent widget that owns this toggle widget.
value	The value or observer value which represents the state of the toggle.
attributes	Different attributes used to configure the label's on the toggle button: a label, alignment or semantic_text_style. 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.

toggle_widget() [3/4]

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

hi::v1::toggle_widget::toggle_widget ( widget * parent, Value && value, OnValue && on_value, Attributes &&... attributes )

inlinenoexcept

Construct a toggle widget with a default button delegate.

See also

default_button_delegate

Parameters

parent	The parent widget that owns this toggle widget.
value	The value or observer value which represents the state of the toggle.
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 toggle button: a label, alignment or semantic_text_style. 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.

toggle_widget() [4/4]

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, button_widget_attribute... Attributes>
requires requires { make_default_toggle_button_delegate(hi_forward(value), hi_forward(on_value), hi_forward(off_value)); }

hi::v1::toggle_widget::toggle_widget ( widget * parent, Value && value, OnValue && on_value, OffValue && off_value, Attributes &&... attributes )

inlinenoexcept

Construct a toggle widget with a default button delegate.

See also

default_button_delegate

Parameters

parent	The parent widget that owns this toggle widget.
value	The value or observer value which represents the state of the toggle.
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 toggle button: a label, alignment or semantic_text_style. 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.

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

• hikogui/src/hikogui/widgets/toggle_widget.hpp