Edje Text example

This example shows how to manipulate TEXT and TEXTBLOCK parts from code.

The very first we are going to do is register a callback to react to changes in the text of our parts:

   edje_object_text_change_cb_set(edje_obj, _on_text_change, NULL);

_on_text_change(void *data __UNUSED__, Evas_Object *obj, const char *part)

Note:

Since edje_obj represent a group we'll be notified whenever any part's text in that group changes.

We now set the text for two our two parts:

   edje_object_part_text_set(edje_obj, "part_one", "one");
   edje_object_part_text_set(edje_obj, "part_two", "<b>two");

Note:

Since the "part_two" part is a TEXTBLOCK we can use formatting such as <b>

And we now move on to selection issues, first thing we do is make sure the user can select text:

   edje_object_part_text_select_allow_set(edje_obj, "part_two", EINA_TRUE);

We then select the entire text, and print the selected text:

   printf("selection: %s\n", edje_object_part_text_selection_get(edje_obj, "part_two"));

We now unselect the entire text(set selection to none), and print the selected text:

   edje_object_part_text_select_none(edje_obj, "part_two");
   printf("selection: %s\n", edje_object_part_text_selection_get(edje_obj, "part_two"));

Our example will look like this:

The full source code follows:

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

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

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

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

static void
_on_text_change(void *data __UNUSED__, Evas_Object *obj, const char *part)
{
   printf("text: %s\n", edje_object_part_text_unescaped_get(obj, part));
}

int
main(int argc __UNUSED__, char *argv[])
{
   char         edje_file_path[PATH_MAX];
   const char  *edje_file = "text.edj";
   Ecore_Evas  *ee;
   Evas        *evas;
   Evas_Object *bg;
   Evas_Object *edje_obj;
   Eina_Prefix *pfx;

   if (!ecore_evas_init())
     return EXIT_FAILURE;

   if (!edje_init())
     goto shutdown_ecore_evas;

   pfx = eina_prefix_new(argv[0], main,
                         "EDJE_EXAMPLES",
                         "edje/examples",
                         edje_file,
                         PACKAGE_BIN_DIR,
                         PACKAGE_LIB_DIR,
                         PACKAGE_DATA_DIR,
                         PACKAGE_DATA_DIR);
   if (!pfx)
     goto shutdown_edje;

   /* 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 free_prefix;

   ecore_evas_callback_delete_request_set(ee, _on_delete);
   ecore_evas_title_set(ee, "Edje text 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_object_associate(ee, bg, ECORE_EVAS_OBJECT_ASSOCIATE_BASE);

   edje_obj = edje_object_add(evas);

   snprintf(edje_file_path, sizeof(edje_file_path),
            "%s/examples/%s", eina_prefix_data_get(pfx), edje_file);
   edje_object_file_set(edje_obj, edje_file_path, "example_group");
   evas_object_move(edje_obj, 20, 20);
   evas_object_resize(edje_obj, WIDTH - 40, HEIGHT - 40);
   evas_object_show(edje_obj);

   edje_object_text_change_cb_set(edje_obj, _on_text_change, NULL);
   edje_object_part_text_set(edje_obj, "part_one", "one");
   edje_object_part_text_set(edje_obj, "part_two", "<b>two");

   edje_object_part_text_select_allow_set(edje_obj, "part_two", EINA_TRUE);
   edje_object_part_text_select_all(edje_obj, "part_two");
   printf("selection: %s\n", edje_object_part_text_selection_get(edje_obj, "part_two"));
   edje_object_part_text_select_none(edje_obj, "part_two");
   printf("selection: %s\n", edje_object_part_text_selection_get(edje_obj, "part_two"));

   ecore_evas_show(ee);

   ecore_main_loop_begin();

   eina_prefix_free(pfx);
   ecore_evas_free(ee);
   ecore_evas_shutdown();
   edje_shutdown();

   return EXIT_SUCCESS;

 free_prefix:
   eina_prefix_free(pfx);
 shutdown_edje:
   edje_shutdown();
 shutdown_ecore_evas:
   ecore_evas_shutdown();

   return EXIT_FAILURE;
}

The theme used in this example is:

collections {
   group {
      name: "sel_group";
      parts {
         part {
            name: "rect";
            type: RECT;
            description {
               state: "default" 0.0;
               color: 0 255 0 255; /* green */
               rel1.relative: 0.0 0.0;
               rel2.relative: 1.0 1.0;
            }
         }
      }
   }
   group {
      name: "example_group";
      max: 500 500;
      min: 50 50;

      styles {
         style {
            name: "textblock_style";
            base: "font=Sans font_size=22 color=#600 wrap=word";
            tag:  "br" "\n";
            tag:  "hilight" "+ font_weight=Bold";
            tag:  "b" "+ font_weight=Bold";
            tag:  "tab" "\t";
         }
      }
      parts {
         part {
            name: "part_one";
            type: TEXT;
            description {
               min: 50 50;
               state: "default" 0.0;
               color: 0 0 255 255; /* blue */
               rel1.relative: 0.0 0.0;
               rel2.relative: 1.0 0.5;
               text {
                  font: "arial";
                  size: 22;
                  min: 1 1;
               }
            }
         }
         part {
            name: "part_two";
            type: TEXTBLOCK;
            select_mode: EXPLICIT;
            source: "sel_group";
            entry_mode: PLAIN;
            description {
               min: 50 50;
               state: "default" 0.0;
               rel1.relative: 0.0 0.5;
               rel2.relative: 1.0 1.0;
               text {
                  style: "textblock_style";
                  min: 1 1;
               }
            }
         }
      }
   }
}

To compile use this command:

 * gcc -o edje-text edje-text.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 text.edc
 *