index_example_01.c: sample code internal refactoring.

- avoid using unnecessary global variable.
- use common name for item variable, it.
- print out more useful messages on _active_set.

legacy/elementary/src/examples/index_example_01.c

@@ -12,22 +12,13 @@
 #include <Elementary.h>
 #include <assert.h>
 
-struct example_data
-{
-   Evas_Object *list, *index;
-};
-
-struct example_data d = {NULL, NULL};
-
 static const char *dict[] = \
 {
 #include "dict.txt"
 };
 
 static void
-_index_item_del(void *data,
+_index_item_del(void *data, Evas_Object *obj, void *event_info)
-                Evas_Object *obj,
-                void *event_info)
 {
    fprintf(stdout, "Deleting index node (%s). Comparing index "
            "item data reported via callback with the one returned by "
@@ -39,55 +30,46 @@ _index_item_del(void *data,
 
 /* delete an index item */
 static void
-_item_del(void *data,
+_item_del(void *data, Evas_Object *obj, void *event_info)
-          Evas_Object *obj,
-          void *event_info)
 {
-   Elm_Object_Item *iit = elm_index_selected_item_get(d.index, 0);
+   Elm_Object_Item *it = elm_index_selected_item_get(data, 0);
 
-   if (!iit) return;
+   if (!it) return;
 
    fprintf(stdout, "Deleting last selected index item, which had letter"
-           " %s (pointing to %p)\n", elm_index_item_letter_get(iit),
+           " %s (pointing to %p)\n", elm_index_item_letter_get(it),
-           elm_object_item_data_get(iit));
+           elm_object_item_data_get(it));
 
-   elm_object_item_del(iit);
+   elm_object_item_del(it);
-   elm_index_level_go(d.index, 0);
+   elm_index_level_go(data, 0);
 }
 
 static void
-_item_del_all(void *data,
+_item_del_all(void *data, Evas_Object *obj, void *event_info)
-              Evas_Object *obj,
-              void *event_info)
 {
-   elm_index_item_clear(d.index);
+   elm_index_item_clear(data);
-   elm_index_level_go(d.index, 0);
+   elm_index_level_go(data, 0);
 }
 
 static void
-_active_set(void *data,
+_active_set(void *data, Evas_Object *obj, void *event_info)
-            Evas_Object *obj,
-            void *event_info)
 {
-   elm_index_autohide_disabled_set
+   Eina_Bool disabled = elm_index_autohide_disabled_get(data);
-      (d.index, !elm_index_autohide_disabled_get(d.index));
+   elm_index_autohide_disabled_set(data, !disabled);
 
-   fprintf(stdout, "Toggling index programmatically.\n");
+   fprintf(stdout, "Toggling index programmatically to %s.\n",
+           !disabled ? "On" : "Off");
 }
 
 /* "delay,changed" hook */
 static void
-_index_changed(void *data,
+_index_changed(void *data, Evas_Object *obj, void *event_info)
-               Evas_Object *obj,
-               void *event_info)
 {
    elm_list_item_bring_in(elm_object_item_data_get(event_info));
 }
 
 static void
-_index_selected(void *data,
+_index_selected(void *data, Evas_Object *obj, void *event_info)
-                Evas_Object *obj,
-                void *event_info)
 {
    Elm_Object_Item *lit = event_info;
 
@@ -98,10 +80,9 @@ _index_selected(void *data,
 }
 
 EAPI_MAIN int
-elm_main(int argc,
+elm_main(int argc, char **argv)
-         char **argv)
 {
-   Evas_Object *win, *hbox, *vbox, *bt, *sep;
+   Evas_Object *win, *hbox, *vbox, *bt, *sep, *list, *id;
    Elm_Object_Item *lit;
    unsigned int i;
    char curr = 0;
@@ -110,28 +91,28 @@ elm_main(int argc,
 
    win = elm_win_util_standard_add("index", "Index Example");
    elm_win_autodel_set(win, EINA_TRUE);
+   evas_object_resize(win, 320, 600);
+   evas_object_show(win);
 
    vbox = elm_box_add(win);
    evas_object_size_hint_weight_set(vbox, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
    elm_win_resize_object_add(win, vbox);
    evas_object_show(vbox);
 
-   d.list = elm_list_add(win);
+   list = elm_list_add(win);
-   evas_object_size_hint_weight_set(d.list, EVAS_HINT_EXPAND,
+   evas_object_size_hint_weight_set(list, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
-                                    EVAS_HINT_EXPAND);
+   evas_object_size_hint_align_set(list, EVAS_HINT_FILL, EVAS_HINT_FILL);
-   evas_object_size_hint_align_set(d.list, EVAS_HINT_FILL, EVAS_HINT_FILL);
+   evas_object_show(list);
-   evas_object_show(d.list);
+   elm_box_pack_end(vbox, list);
-   elm_box_pack_end(vbox, d.list);
 
-   d.index = elm_index_add(win);
+   id = elm_index_add(win);
-   evas_object_size_hint_weight_set(d.index, EVAS_HINT_EXPAND,
+   evas_object_size_hint_weight_set(id, EVAS_HINT_EXPAND, EVAS_HINT_EXPAND);
-                                    EVAS_HINT_EXPAND);
+   elm_win_resize_object_add(win, id);
-   elm_win_resize_object_add(win, d.index);
+   evas_object_show(id);
-   evas_object_show(d.index);
 
    for (i = 0; i < (sizeof(dict) / sizeof(dict[0])); i++)
      {
-        lit = elm_list_item_append(d.list, dict[i], NULL, NULL, NULL, NULL);
+        lit = elm_list_item_append(list, dict[i], NULL, NULL, NULL, NULL);
 
         if (curr != dict[i][0])
           {
@@ -142,20 +123,20 @@ elm_main(int argc,
              /* indexing by first letters */
 
              snprintf(buf, sizeof(buf), "%c", curr);
-             index_it = elm_index_item_append(d.index, buf, NULL, lit);
+             index_it = elm_index_item_append(id, buf, NULL, lit);
 
              /* this is here just to demostrate the API call */
-             it = elm_index_item_find(d.index, lit);
+             it = elm_index_item_find(id, lit);
              assert(it == index_it);
 
              elm_object_item_del_cb_set(index_it, _index_item_del);
           }
      }
 
-   evas_object_smart_callback_add(d.index, "delay,changed", _index_changed,
+   evas_object_smart_callback_add(id, "delay,changed", _index_changed,
                                   NULL);
-   evas_object_smart_callback_add(d.index, "selected", _index_selected, NULL);
+   evas_object_smart_callback_add(id, "selected", _index_selected, NULL);
-   elm_index_level_go(d.index, 0);
+   elm_index_level_go(id, 0);
 
    /* attribute setting knobs */
    sep = elm_separator_add(win);
@@ -172,25 +153,22 @@ elm_main(int argc,
 
    bt = elm_button_add(win);
    elm_object_text_set(bt, "bring in index");
-   evas_object_smart_callback_add(bt, "clicked", _active_set, NULL);
+   evas_object_smart_callback_add(bt, "clicked", _active_set, id);
    elm_box_pack_end(hbox, bt);
    evas_object_show(bt);
 
    bt = elm_button_add(win);
    elm_object_text_set(bt, "delete last selected item");
-   evas_object_smart_callback_add(bt, "clicked", _item_del, NULL);
+   evas_object_smart_callback_add(bt, "clicked", _item_del, id);
    elm_box_pack_end(hbox, bt);
    evas_object_show(bt);
 
    bt = elm_button_add(win);
    elm_object_text_set(bt, "delete all items");
-   evas_object_smart_callback_add(bt, "clicked", _item_del_all, NULL);
+   evas_object_smart_callback_add(bt, "clicked", _item_del_all, id);
    elm_box_pack_end(hbox, bt);
    evas_object_show(bt);
 
-   evas_object_resize(win, 320, 600);
-   evas_object_show(win);
-
    elm_run();
    elm_shutdown();