set the theme to objects.

main.c

@@ -23,11 +23,14 @@ elm_main(int argc, char **argv)
    // TODO: run this in a background
    theme_init();
    theme_load(edje_file);
+   theme_set(edje_file);
 
    gui_create(edje_file);
    gui_widget_load();
 
    elm_run();
+
+   theme_unset(edje_file);
    elm_shutdown();
 
    return 0;

theme.c

@@ -1,4 +1,4 @@
-#include <Edje.h>
+#include <Elementary.h>
 #include "log.h"
 #include "theme.h"
 
@@ -13,6 +13,7 @@ char *widgets[] = {
      "scroller", "segment_control", "separator", "slider", "slideshow",
      "spinner", "thumb", "toolbar", "tooltip", "video", "win", NULL };
 Eina_List *widget_list;
+Elm_Theme *th;
 
 void
 theme_init(void)
@@ -22,6 +23,7 @@ theme_init(void)
 
    if (widget_list) return;
 
+   // TODO : create only necessary widget data. do not create all wd for unused widgets.
    while (widgets[i])
      {
         wd = (Widget_Data *)calloc(1, sizeof(Widget_Data));
@@ -32,6 +34,25 @@ theme_init(void)
    INF("Theme Init Done");
 }
 
+void
+theme_set(const char *edje_file)
+{
+   if (!edje_file) return;
+
+   th = elm_theme_new();
+   elm_theme_ref_set(th, NULL);
+   elm_theme_overlay_add(th, edje_file);
+}
+
+void
+theme_unset(const char *edje_file)
+{
+   if (!edje_file) return;
+
+   elm_theme_overlay_del(th, edje_file);
+   elm_theme_free(th);
+}
+
 void
 theme_load(const char *edje_file)
 {

theme.h

@@ -2,6 +2,7 @@
 #define __INCLUDE_THEME__
 
 extern Eina_List *widget_list;
+extern Elm_Theme *th;
 
 typedef struct _Widget_Data Widget_Data;
 struct _Widget_Data
@@ -11,6 +12,8 @@ struct _Widget_Data
 };
 
 void theme_init(void);
+void theme_set(const char *edje_file);
+void theme_unset(const char *edje_file);
 void theme_load(const char *edje_file);
 Eina_List * theme_widget_styles_get(const char *widget);
 void theme_widget_styles_print(const char *widget);

widget.c

@@ -2,6 +2,7 @@
 #include "common.h"
 #include "gui.h"
 #include "log.h"
+#include "theme.h"
 
 static const char *
 _parse_style(const char *orig_style)
@@ -106,5 +107,6 @@ widget_create(const char *widget, const char *orig_style)
      o = _widget_frame_create(style);
    else
      o = _widget_bg_create(NULL);
+   elm_object_theme_set(o, th);
    return o;
 }