Radio is a widget that allows for 1 or more options to be displayed and have the user choose only 1 of them.

A radio object contains an indicator, an optional Label and an optional icon object. While it's possible to have a group of only one radio they, are normally used in groups of 2 or more.

elm_radio objects are grouped in a slightly different, compared to other UI toolkits. There is no separate group name/id to remember or manage. The members represent the group, there are the group. To make a group, use elm_radio_group_add() and pass existing radio object and the new radio object.

The radio object(s) will select from one of a set of integer values, so any value they are configuring needs to be mapped to a set of integers. To configure what value that radio object represents, use elm_radio_state_value_set() to set the integer it represents. To set the value the whole group(which one is currently selected) is to indicate use elm_radio_value_set() on any group member, and to get the groups value use elm_radio_value_get(). For convenience the radio objects are also able to directly set an integer(int) to the value that is selected. To specify the pointer to this integer to modify, use elm_radio_value_pointer_set(). The radio objects will modify this directly. That implies the pointer must point to valid memory for as long as the radio objects exist.

This widget inherits from the Layout one, so that all the functions acting on it also work for radio objects.

This widget emits the following signals, besides the ones sent from Layout :

"changed" - This is called when the radio object is selected. If you want to trace the state change of a radio group, you should add this callback to all the radio objects in that group.
"focused" - When the radio has received focus. (since 1.8)
"unfocused" - When the radio has lost focus. (since 1.8)
"language,changed" - the program's language changed (since 1.9)

Default content parts of the radio widget that you can use for are:

"icon" - An icon of the radio

Default text parts of the radio widget that you can use for are:

"default" - A label of the radio

Supported elm_object common APIs.

Radio example show most of this API in action.

Functions
void	elm_radio_state_value_set (Efl_Ui_Radio *obj, int value)
	Set the integer value that this radio object represents.
int	elm_radio_state_value_get (const Efl_Ui_Radio *obj)
	Get the integer value that this radio object represents.
void	elm_radio_value_pointer_set (Efl_Ui_Radio obj, int valuep)
	Set a convenience pointer to an integer, which changes when radio group value changes.
Efl_Canvas_Object *	elm_radio_selected_object_get (const Efl_Ui_Radio *obj)
	Get the selected radio object.
void	elm_radio_group_add (Efl_Ui_Radio obj, Efl_Ui_Radio group)
	Add this radio to a group of other radio objects.
Evas_Object *	elm_radio_add (Evas_Object *parent)
	Add a new radio to the parent.
void	elm_radio_value_set (Evas_Object *obj, int value)
	Set the value of the radio group.
int	elm_radio_value_get (const Evas_Object *obj)
	Get the value of the radio group.

Function Documentation

Evas_Object* elm_radio_add ( Evas_Object * parent )

Add a new radio to the parent.

Parameters:

parent The parent object

Returns:: The new object or NULL if it cannot be created

Since :: 2.3.1

Examples:: bg_example_03.c, entry_example.c, flip_example_01.c, and radio_example_01.c.

void elm_radio_group_add	(	Efl_Ui_Radio *	obj,
		Efl_Ui_Radio *	group
	)

Add this radio to a group of other radio objects.

Radio objects work in groups. Each member should have a different integer value assigned. In order to have them work as a group, they need to know about each other. This adds the given radio object to the group of which the group object indicated is a member.

Parameters:

[in]	obj	The object.
[in]	group	Any radio object whose group the obj is to join.

Since :: 2.3.1

Examples:: bg_example_03.c, entry_example.c, flip_example_01.c, and radio_example_01.c.

Efl_Canvas_Object* elm_radio_selected_object_get ( const Efl_Ui_Radio * obj )

Get the selected radio object.

Parameters:

[in] obj The object.

Returns:: The selected radio object

Since :: 2.3.1

int elm_radio_state_value_get ( const Efl_Ui_Radio * obj )

Get the integer value that this radio object represents.

This gets the value of the radio.

Parameters:

[in] obj The object.

Returns:: The value to use if this radio object is selected.

Since :: 2.3.1

Examples:: flip_example_01.c.

void elm_radio_state_value_set	(	Efl_Ui_Radio *	obj,
		int	value
	)

Set the integer value that this radio object represents.

This sets the value of the radio.

Parameters:

[in]	obj	The object.
[in]	value	The value to use if this radio object is selected.

Since :: 2.3.1

Examples:: bg_example_03.c, entry_example.c, flip_example_01.c, and radio_example_01.c.

int elm_radio_value_get ( const Evas_Object * obj )

Get the value of the radio group.

Returns:: The value to use for the group

Since :: 2.3.1

Examples:: bg_example_03.c.

void elm_radio_value_pointer_set	(	Efl_Ui_Radio *	obj,
		int *	valuep
	)

Set a convenience pointer to an integer, which changes when radio group value changes.

This sets a pointer to an integer that in addition to the radio object state will also be modified directly. To stop setting the object pointed to, simply use NULL as the valuep argument. If valuep is not NULL then when called, the radio object state will also be modified to reflect the value of the integer valuep points to, just like calling elm_radio_value_set().

Parameters:

[in]	obj	The object.
[in]	valuep	Pointer to the integer to modify

Since :: 2.3.1

Examples:: entry_example.c, and radio_example_01.c.

void elm_radio_value_set	(	Evas_Object *	obj,
		int	value
	)

Set the value of the radio group.

This sets the value of the radio group and will also set the value if pointed to, to the value supplied, but will not call any callbacks.

Parameters:

[in] value The value to use for the group

Since :: 2.3.1

Examples:: bg_example_03.c, and flip_example_01.c.

Functions

Function Documentation