Tooltip

The tooltip component is a smart object that shows content in a frame when the mouse hovers over the parent object. It provides tips or information about the parent object. A tooltip component is not a UI component as such, so it does not emit signals. For more information, see the Tooltip API.

This feature is supported in mobile applications only.

Basic Usage

Note

You cannot create a tooltip component with the elm_tooltip_add() function. This component is already contained in a parent component when it is created. You can only activate or disable the tooltip.

To activate a tooltip on a parent object in your application:

  1. Set a tooltip text to a button component using the elm_object_tooltip_text_set() function:

    Evas_Object *button = elm_button_add(parent);

evas_object_show(button);

elm_object_tooltip_text_set(button, "The tooltip text");

  2. You can set content to the tooltip using the elm_object_tooltip_content_cb_set() function.

    The second parameter defines a callback which is triggered each time the tooltip is shown. Use the callback to create the content to be shown in the tooltip. The callback returns a pointer to an Evas_Object.

    The fourth parameter defines a callback which is triggered when the tooltip disappears. Use the callback to delete the previously allocated Evas_Object.

    elm_object_tooltip_content_cb_set(obj, tooltip_content_cb, data, tooltip_content_del_cb);

Evas_Object*
tooltip_content_cb(void *data, Evas_Object *obj, Evas_Object *tooltip)
{
    /* Create the tooltip content */
}

void
tooltip_content_del_cb(void *data, Evas_Object *obj, void *event_info)
{
    /* Destroy the tooltip content */
}

  3. You can also set a style and fill the layout with a text or an image according to the style:

    • Set a style to the tooltip with the elm_object_tooltip_style_set() function. If you use the default style, you can skip this step.

      elm_object_tooltip_style_set(obj, "transparent");

    • To get the current style, use the elm_object_tooltip_style_get() function:

      char *style = elm_object_tooltip_style_get(obj);

  4. After you have set the tooltip text or content, you can manually hide or show the tooltip:

    /* Hide */
elm_object_tooltip_hide(obj);
/* Show */
elm_object_tooltip_show(obj);

  5. When no longer needed, remove the tooltip from the object:

    elm_object_tooltip_unset(obj);

    Note

    If content was set into the tooltip object, unsetting the tooltip calls the callback provided as the fourth parameter of the elm_object_tooltip_content_cb_set() function. The callback is used to notify the application that the tooltip can no longer be used.

The following example shows a simple use case of the tooltip component on a button component.

Example: Tooltip use case

Alignment

Evas_Object *win;
Evas_Object *conf;
Evas_Object *nf;
Evas_Object *box;
Evas_Object *button;
Evas_Object *icon;

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

box = elm_box_add(nf);

/* Add a button and set a style */
button = elm_button_add(box);
elm_object_style_set(button, "circle");

/* Add an icon and set it as a content */
icon = elm_icon_add(button);
elm_icon_standard_set(icon, "home");
elm_object_part_content_set(button, "icon", icon);

/* Set a tooltip on a button */
elm_object_tooltip_text_set(button, "The tooltip text");

elm_box_pack_end(box, button);
evas_object_show(button);

evas_object_show(box);

Features

You can activate the window mode for the tooltip with the elm_object_tooltip_window_mode_set() function.

The window mode allows the tooltip to expand beyond its parent window canvas. It is limited only by the size of the display.

elm_object_tooltip_window_mode_set(parent, EINA_TRUE);
elm_object_tooltip_window_mode_get(parent);

Styles

The following table lists the available component styles.

Table: Tooltip styles

Style Sample Text part Swallow part
default elm/tooltip/base/default default elm.swallow.content
transparent elm/button/base/transparent default elm.swallow.content

Note

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

  • Dependencies
    • Tizen 2.4 and Higher for Mobile
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