On Tue, Jul 20, 2010 at 2:35 PM, Andreas Volz <li...@brachttal.net> wrote:
> Am Mon, 12 Jul 2010 21:57:35 +0200 schrieb Andreas Volz:
>
> No reason? Or does simply no one know? Should I fix it to use the data
> pointer?
>
No, it should not use the data pointer. The data pointer is for user specific
data to be passed to callbacks, the event_info pointer, for anything specific
to that event. In this case, the specific data to that event is a pointer to an
item.
> regards
> Andreas
>
>> Hello,
>>
>> while porting the Elm GenList to C++ I found this code in
>> test_genlist.c:
>>
>> static void
>> gl4_exp(void *data, Evas_Object *obj, void *event_info)
>> {
>> Elm_Genlist_Item *it = event_info;
>> Evas_Object *gl = elm_genlist_item_genlist_get(it);
>> int val = (int)elm_genlist_item_data_get(it);
>> val *= 10;
>> elm_genlist_item_append(gl, &itc4,
>> (void *)(val + 1)/* item data */, it/*
>> parent */, ELM_GENLIST_ITEM_NONE, gl4_sel/* func */, NULL/* func data
>> */); elm_genlist_item_append(gl, &itc4,
>> (void *)(val + 2)/* item data */, it/*
>> parent */, ELM_GENLIST_ITEM_NONE, gl4_sel/* func */, NULL/* func data
>> */); elm_genlist_item_append(gl, &itc4,
>> (void *)(val + 3)/* item data */, it/*
>> parent */, ELM_GENLIST_ITEM_SUBITEMS, gl4_sel/* func */, NULL/* func
>> data */); }
>> static void
>> gl4_con(void *data, Evas_Object *obj, void *event_info)
>> {
>> Elm_Genlist_Item *it = event_info;
>> elm_genlist_item_subitems_clear(it);
>> }
>>
>> static void
>> gl4_exp_req(void *data, Evas_Object *obj, void *event_info)
>> {
>> Elm_Genlist_Item *it = event_info;
>> elm_genlist_item_expanded_set(it, 1);
>> }
>> static void
>> gl4_con_req(void *data, Evas_Object *obj, void *event_info)
>> {
>> Elm_Genlist_Item *it = event_info;
>> elm_genlist_item_expanded_set(it, 0);
>> }
>>
>>
>> I'm really wondering about the usage of void *event_info. Could you
>> explain me why it's used here as data pointer? In my eyes
>> Elm_Genlist_Item isn't really an event. I would have used void *data
>> for this reason. Could you explain this?
>>
>> regards
>> Andreas
>>
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>
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