Slider

The slider UI component is a draggable item used to select a value within a certain range. For more information, see the Slider API.

This feature is optional.

Basic Usage

To use a slider component in your application:

1. Create a new slider with the elm_slider_add() function:

   Evas_Object *slider = NULL;
   
   slider = elm_slider_add(parent);
   

2. Configure the slider. The following configurations are optional. Unless you set other options, the slider uses the default styles.

   • Set the slider style:

     /* Default: "default" */
     elm_object_style_set(slider, "default");
     

   • Set other options.

     elm_slider_inverted_set(slider, EINA_FALSE);
     elm_slider_indicator_show_set(slider, EINA_TRUE);
     elm_slider_indicator_format_set(slider, "%.1f");
     

3. Register the callback functions.

   The following example shows how to define and register a callback for the changed signal:

   evas_object_smart_callback_add(slider, "changed", slider_changed_cb, 0);
   
   static void
   slider_changed_cb(void *data, Evas_Object *obj, void *event_info)
   {
       double v = elm_slider_value_get(obj);
       dlog_print(DLOG_INFO, LOG_TAG, "The slider value has changed: %0.1f\n", v);
   }
   

The following example shows a simple use case of the slider component.

Example: Slider use case

Evas_Object *box;
Evas_Object *slider;
Evas_Object *nf;

/* Starting right after the basic EFL UI layout code */
/* (win - conformant - naviframe) */

box = elm_box_add(nf);
elm_naviframe_item_push(nf, "Slider", NULL, NULL, box, NULL);

/* Add a slider */
slider = elm_slider_add(box);
evas_object_size_hint_align_set(slider, EVAS_HINT_FILL, 0.5);

/* Set a style */
elm_object_style_set(slider, "center_point");

/* Set the slider range */
elm_slider_min_max_set(slider, 0.0, 10.0);
elm_slider_value_set(slider, 5.0);

evas_object_show(slider);
elm_box_pack_end(box, slider);

Options

You can build various sliders by combining styles and options:

• Slider indicator

  Table: Slider indicator

  EINA_TRUE	EINA_FALSE

  Evas_Object *slider;
  Evas_Object *nf;
  Evas_Object *box;
  /* Add a box to contain a slider */
  box = elm_box_add(nf);
  elm_naviframe_item_push(nf, "Slider", NULL, NULL, box, NULL);
  
  /* Add a slider */
  slider = elm_slider_add(box);
  evas_object_size_hint_align_set(slider, EVAS_HINT_FILL, 0.5);
  
  /* Set styles in various ways */
  elm_object_style_set(slider, "default");
  elm_slider_indicator_show_set(slider, EINA_TRUE);
  elm_slider_indicator_format_set(slider, "%.2f");
  
  /* Set the slider range */
  elm_slider_min_max_set(slider, 0.0, 10.0);
  elm_slider_value_set(slider, 5.0);
  
  evas_object_show(slider);
  elm_box_pack_end(box, slider);
  

• Slider orientation

  Table: Slider orientation

  EINA_TRUE	EINA_FALSE

  Evas_Object *slider;
  Evas_Object *nf;
  Evas_Object *box;
  
  box = elm_box_add(nf);
  elm_naviframe_item_push(nf, "Slider", NULL, NULL, box, NULL);
  
  /* Add a slider */
  slider = elm_slider_add(box);
  evas_object_size_hint_align_set(slider, EVAS_HINT_FILL, EVAS_HINT_FILL);
  
  /* Set the slider orientation */
  elm_slider_horizontal_set(slider, EINA_TRUE);
  elm_slider_value_set(slider, 0.7);
  
  evas_object_show(slider);
  elm_box_pack_end(box, slider);
  

• Inverted slider

  Table: Inverted slider

  EINA_TRUE	EINA_FALSE

box = elm_box_add(nf);
elm_naviframe_item_push(nf, "Slider", NULL, NULL, box, NULL);

/* Add a slider */
slider = elm_slider_add(box);
evas_object_size_hint_align_set(slider, EVAS_HINT_FILL, 0.5);

elm_object_style_set(slider, "warning");
elm_slider_inverted_set(slider, EINA_TRUE);

evas_object_show(slider);
elm_box_pack_end(box, slider);

Styles

The following table lists the available component styles.

Table: Slider styles

Style	Horizontal	Vertical
default
center_point
warning

Callbacks

You can register callback functions connected to the following signals for a slider object.

Table: Slider callback signals

Note

The signal list in the API reference can be more extensive, but only the above signals are actually supported in Tizen.

Note

Except as noted, this content is licensed under LGPLv2.1+.

Related Information

• Dependencies
  • Since Tizen 2.4