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=== Elementary Animations ===
==== Creating a Zoom Effect ====
The zoom effect zooms on the animation target to make it twice bigger. Store
the source rate and the destination rate in the application data using
anim->zfrom and anim->zto.
Create the button and add it to the center column.
<code c>
The zoom button
Evas_Object *btn_zoom = elm_button_add(win);
elm_object_text_set(btn_zoom, “Zoom”);
evas_object_size_hint_weight_set(btn_zoom, EVAS_HINT_FILL, EVAS_HINT_FILL);
evas_object_show(btn_zoom);
evas_object_smart_callback_add(btn_zoom, “clicked”, _btn_zoom_cb, &anim);
elm_box_pack_end(right_vbox, btn_zoom);
</code>
Then add a callback function in order to perform the animation.
<code c>
static void _btn_zoom_cb(void *data, Evas_Object *btn, void *ev)
{
Animations *anim = (Animations *)data;
Starting the rotation effect 360 degrees
evas_object_resize(anim->button, 100, 50);
elm_object_text_set(anim->button, “Zoom”);
_zoom_effect(anim->button, *(anim->zfrom), *(anim->zto));
}
</code>
To create the zoom effect, use elm_transit_effect_zoom_add with the start
rate and the destination rate stored in application data (anim->zfrom and
anim->zto)
<code c>
static void
_zoom_effect(Evas_Object *obj, float from, float to)
{
Elm_Transit *trans = elm_transit_add();
elm_transit_object_add(trans, obj);
elm_transit_effect_zoom_add(trans, from, to);
elm_transit_duration_set(trans, 2.0);
elm_transit_go(trans);
}
</code>
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