Swallow example 2

This example will show you how to load an image using evas and fill a swallow with it. It's basically almost like the last example, but with a minor change.

This variables are used to store the name of the image that is going to be used, the path to it and a variable that will store the error cause if something goes wrong.

Here it is:

   const char  *edje_file = PACKAGE_DATA_DIR"/swallow.edj";
   const char  *img_file = PACKAGE_DATA_DIR"/bubble.png";
   Evas_Load_Error err;

Then we load the image with this command:

   img = evas_object_image_filled_add(evas);
   evas_object_image_file_set(img, img_file, NULL);

To check if we had some problem we use:

   err = evas_object_image_load_error_get(img);

   if (err != EVAS_LOAD_ERROR_NONE)
   {
      fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n",
              img_file, evas_load_error_str(err));
     goto shutdown_edje;
   }

Now we are going to swallow it and check if worked. If you notice we are using "part_one" as argument. We do this because we must explicit what part of our .edc file we want to swallow:

   edje_object_part_swallow(edje_obj, "part_one", img);

   obj = edje_object_part_swallow_get(edje_obj, "part_one");

   if(obj == img)
      printf("Swallowing worked!\n");

The example's window should look like this picture:

The complete .edc file:

And the source code:

#ifdef HAVE_CONFIG_H
# include "config.h"
#else
# define EINA_UNUSED
#endif

#ifndef PACKAGE_DATA_DIR
#define PACKAGE_DATA_DIR "."
#endif

#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Edje.h>

#define WIDTH  (300)
#define HEIGHT (300)

static void
_on_delete(Ecore_Evas *ee EINA_UNUSED)
{
   ecore_main_loop_quit();
}

int
main(int argc EINA_UNUSED, char *argv[] EINA_UNUSED)
{
   const char  *edje_file = PACKAGE_DATA_DIR"/swallow.edj";
   const char  *img_file = PACKAGE_DATA_DIR"/bubble.png";
   Ecore_Evas  *ee;
   Evas        *evas;
   Evas_Object *bg;
   Evas_Object *img;
   Evas_Object *obj;
   Evas_Object *edje_obj;
   Evas_Load_Error err;

   if (!ecore_evas_init())
     return EXIT_FAILURE;

   if (!edje_init())
     goto shutdown_ecore_evas;

   /* this will give you a window with an Evas canvas under the first
    * engine available */
   ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
   if (!ee) goto shutdown_edje;

   ecore_evas_callback_delete_request_set(ee, _on_delete);

   ecore_evas_title_set(ee, "Edje Swallow Example");

   evas = ecore_evas_get(ee);

   bg = evas_object_rectangle_add(evas);
   evas_object_color_set(bg, 255, 255, 255, 255); /* white bg */
   evas_object_move(bg, 0, 0); /* at canvas' origin */
   evas_object_resize(bg, WIDTH, HEIGHT); /* covers full canvas */
   evas_object_show(bg);
   ecore_evas_data_set(ee, "background", bg);

   ecore_evas_object_associate(ee,bg, ECORE_EVAS_OBJECT_ASSOCIATE_BASE);

   edje_obj = edje_object_add(evas);

   edje_object_file_set(edje_obj, edje_file, "example_group");
   evas_object_move(edje_obj, 20, 20);
   evas_object_resize(edje_obj, WIDTH - 40, HEIGHT - 40);
   evas_object_show(edje_obj);

   img = evas_object_image_filled_add(evas);
   evas_object_image_file_set(img, img_file, NULL);

   err = evas_object_image_load_error_get(img);

   if (err != EVAS_LOAD_ERROR_NONE)
   {
      fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n",
              img_file, evas_load_error_str(err));
     goto shutdown_edje;
   }

   edje_object_part_swallow(edje_obj, "part_one", img);

   obj = edje_object_part_swallow_get(edje_obj, "part_one");

   if(obj == img)
      printf("Swallowing worked!\n");

   ecore_evas_show(ee);

   ecore_main_loop_begin();

   ecore_evas_free(ee);
   ecore_evas_shutdown();
   edje_shutdown();

   return EXIT_SUCCESS;

 shutdown_edje:
   edje_shutdown();
 shutdown_ecore_evas:
   ecore_evas_shutdown();

   return EXIT_FAILURE;
}

To compile use this command:

 * gcc -o edje-swallow2 edje-swallow2.c -DPACKAGE_BIN_DIR=\"/Where/enlightenment/is/installed/bin\"
 * -DPACKAGE_LIB_DIR=\"/Where/enlightenment/is/installed/lib\"
 * -DPACKAGE_DATA_DIR=\"/Where/enlightenment/is/installed/share\"
 * `pkg-config --cflags --libs evas ecore ecore-evas edje`
 *
 * edje_cc swallow.edc
 *