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/**
* Simple Edje example illustrating the Edje signals and messages
*
* You'll need at least one Evas engine built for it (excluding the
* buffer one). See stdout/stderr for output.
*
* @verbatim
* gcc -o edje-signals-messages edje-signals-messages.c `pkg-config --libs --cflags evas ecore ecore-evas edje`
* @endverbatim
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#define __UNUSED__
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Edje.h>
#include <stdio.h>
#define WIDTH (300)
#define HEIGHT (300)
#define MSG_COLOR 1
#define MSG_TEXT 2
static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";
static const char *edje_file_path = \
PACKAGE_EXAMPLES_DIR "/signals-messages.edj";
static Ecore_Evas *ee;
static Evas_Object *edje_obj;
static Eina_Bool right_rect_show = EINA_TRUE;
static const char *commands = \
"commands are:\n"
"\tt - toggle right rectangle's visibility\n"
"\th - print help\n";
static void
_on_keydown(void *data __UNUSED__,
Evas *evas __UNUSED__,
Evas_Object *o __UNUSED__,
void *einfo)
{
Evas_Event_Key_Down *ev = einfo;
if (strcmp(ev->keyname, "h") == 0) /* print help */
{
fprintf(stdout, commands);
return;
}
if (strcmp(ev->keyname, "t") == 0) /* toggle right rectangle's visibility */
{
char buf[1024];
right_rect_show = !right_rect_show;
snprintf(buf, sizeof(buf), "part_right,%s",
right_rect_show ? "show" : "hide");
printf("emitting %s\n", buf);
edje_object_signal_emit(edje_obj, buf, "");
return;
}
}
static void
_on_delete(Ecore_Evas *ee __UNUSED__)
{
ecore_main_loop_quit();
}
/* print signals coming from theme */
static void
_sig_print(const char *emission,
const char *source)
{
fprintf(stdout, "Signal %s coming from part %s!\n", emission, source);
}
static void
_mouse_wheel_cb(void *data __UNUSED__,
Evas_Object *obj __UNUSED__,
const char *emission,
const char *source)
{
_sig_print(emission, source);
}
/* mouse over signals */
static void
_mouse_over_cb(void *data __UNUSED__,
Evas_Object *obj __UNUSED__,
const char *emission,
const char *source)
{
int i;
_sig_print(emission, source);
Edje_Message_Int_Set *msg = malloc(sizeof(*msg) + 3 * sizeof(int));
msg->count = 4;
for (i = 0; i < 4; i++)
msg->val[i] = rand() % 256;
edje_object_message_send(edje_obj, EDJE_MESSAGE_INT_SET, MSG_COLOR, msg);
free(msg);
}
/* print out received message string */
static void
_message_handle(void *data __UNUSED__,
Evas_Object *obj __UNUSED__,
Edje_Message_Type type,
int id,
void *msg)
{
Edje_Message_String *m;
if (type != EDJE_MESSAGE_STRING) return;
if (id != MSG_TEXT) return;
m = msg;
fprintf(stdout, "String message received: %s\n", m->str);
}
int
main(void)
{
Evas_Object *border, *bg;
Evas *evas;
srand(time(NULL));
if (!ecore_evas_init())
return EXIT_FAILURE;
if (!edje_init())
return EXIT_FAILURE;
/* 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 error;
ecore_evas_callback_delete_request_set(ee, _on_delete);
ecore_evas_title_set(ee, "Edje Basics Example");
ecore_evas_show(ee);
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);
evas_object_focus_set(bg, EINA_TRUE);
evas_object_event_callback_add(
bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
edje_obj = edje_object_add(evas);
if (!edje_object_file_set(edje_obj, edje_file_path, "example_group"))
{
int err = edje_object_load_error_get(edje_obj);
const char *errmsg = edje_load_error_str(err);
fprintf(stderr, "Could not load 'example_group' from "
"signals-messages.edj: %s\n", errmsg);
evas_object_del(edje_obj);
goto error_edj;
}
edje_object_signal_callback_add(edje_obj, "mouse,wheel,*", "part_left",
_mouse_wheel_cb, NULL);
edje_object_signal_callback_add(edje_obj, "mouse,over", "part_right",
_mouse_over_cb, NULL);
edje_object_message_handler_set(edje_obj, _message_handle, NULL);
evas_object_move(edje_obj, 20, 20);
evas_object_resize(edje_obj, WIDTH - 40, HEIGHT - 40);
evas_object_show(edje_obj);
/* this is a border around the Edje object above, here just to
* emphasize its geometry */
border = evas_object_image_filled_add(evas);
evas_object_image_file_set(border, border_img_path, NULL);
evas_object_image_border_set(border, 2, 2, 2, 2);
evas_object_image_border_center_fill_set(border, EVAS_BORDER_FILL_NONE);
evas_object_resize(border, WIDTH - 40 + 4, HEIGHT - 40 + 4);
evas_object_move(border, 20 - 2, 20 - 2);
evas_object_repeat_events_set(border, EINA_TRUE);
evas_object_show(border);
fprintf(stdout, commands);
ecore_main_loop_begin();
ecore_evas_free(ee);
ecore_evas_shutdown();
edje_shutdown();
return 0;
error:
fprintf(stderr, "You got to have at least one Evas engine built"
" and linked up to ecore-evas for this example to run"
" properly.\n");
ecore_evas_shutdown();
return -1;
error_edj:
fprintf(stderr, "Failed to load signals-messages.edj!\n");
ecore_evas_shutdown();
return -2;
}
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