Spinner

This feature is supported in mobile applications only.

The spinner component increases or decreases a numeric value with the arrow buttons.

The spinner component inherits from the layout component, which means that layout functions can be used on the spinner component.

For more information, see the Spinner API.

Figure: Spinner component

Spinner component

Figure: Spinner hierarchy

Spinner hierarchy

Adding a Spinner Component

To create a spinner component, use the elm_spinner_add() function:

Evas_Object *spin;
Evas_Object *parent;

spin = elm_spinner_add(parent);

Using the Spinner Styles

The following table lists the available spinner styles.

Table: Spinner styles

Style Sample
elm/spinner/base/horizontal elm/spinner/base/horizontal
elm/spinner/base/vertical elm/spinner/base/vertical

To use the spinner styles:

  • Set the spinner style with the elm_object_style_set() function.

    To set the style to, for example, vertical:

    elm_object_style_set(spinner, "vertical");

  • Get the current style with the elm_object_style_get() function:

    char *style = elm_object_style_get(spinner);

Configuring the Spinner

To configure the spinner:

  • Set the label format:

    elm_spinner_label_format_set(spin, "%1.2f meters");

  • Determine the result of clicking the arrow buttons.

    In the following example, a click on an arrow increases or decreases the spinner value by 2.0 units:

    elm_spinner_step_set(spin, 2.0);

  • Activate the wrapping mode.

    In this mode, the spinner wraps when it reaches its minimum or maximum value.

    elm_spinner_wrap_set(spin, EINA_TRUE);

  • Set the minimum and maximum values of the spinner:

    elm_spinner_min_max_set(spin, -25.0, 100.0);

  • Modify the change interval when the user long-presses the arrows to change the value faster:

    elm_spinner_interval_set(spin, 0.1);

  • Add custom text labels, if the user has to select between text values instead of numerical values.

    In the following example, the spin2 component shows 3 numbers written in text characters:

    Evas_Object *spin2 = elm_spinner_add(parent);

elm_spinner_min_max_set(spin2, 1, 3);
elm_spinner_special_value_add(spin2, 1, "One");
elm_spinner_special_value_add(spin2, 2, "Two");
elm_spinner_special_value_add(spin2, 3, "Three");

Using the Spinner Callbacks

To receive notifications about the spinner events, listen for the following signals:

  • changed: The spinner value changes.
  • delay,changed: The user stops dragging for a very short period or releases the finger or mouse. The signal is emitted a short time after the user changes the value, to avoid possibly expensive reactions to the value change.
  • language,changed: The program language is changed.

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

To register and define a callback for the delay,changed signal:

{
    evas_object_smart_callback_add(spin, "delay,changed", delay_changed_cb, data);
}

/* Callback for the "delay,changed" signal */
/* Called a short time after the spinner value changes */
void
delay_changed_cb(void *data, Evas_Object *obj, void *event_info)
{
    dlog_print(DLOG_INFO, LOG_TAG, "The spinner value has changed\n");
}

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

  • Dependencies
    • Tizen 2.4 and Higher for Mobile
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