edje-perspective.c
#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 480
#define HEIGHT 320
static const char commands[] = \
"commands are:\n"
"\tDown - move part down\n"
"\tUp - move part up\n"
"\tLeft - move part left\n"
"\tRight - move part right\n"
"\tPrior - move part up-left\n"
"\tNext - move part down-right\n"
"\tInsert - increase focal\n"
"\tSuppr - decrease focal\n"
"\tEsc - exit\n"
"\th - print help\n";
struct _App {
Evas_Object *edje_obj;
Evas_Object *bg;
Edje_Perspective *ps;
Eina_Bool animating;
int x, y; // relative position of part in the screen
int focal;
};
static void
_on_destroy(Ecore_Evas *ee EINA_UNUSED)
{
ecore_main_loop_quit();
}
/* here just to keep our example's window size and background image's
* size in synchrony */
static void
_on_canvas_resize(Ecore_Evas *ee)
{
int w, h;
struct _App *app = ecore_evas_data_get(ee, "app");
ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
evas_object_resize(app->bg, w, h);
evas_object_resize(app->edje_obj, w, h);
}
static void
_part_move(struct _App *app, int dx, int dy)
{
char emission[64];
if (app->animating)
return;
app->x += dx;
app->y += dy;
if (app->x > 1)
app->x = 1;
if (app->x < 0)
app->x = 0;
if (app->y > 1)
app->y = 1;
if (app->y < 0)
app->y = 0;
snprintf(emission, sizeof(emission), "move,%d,%d", app->x, app->y);
edje_object_signal_emit(app->edje_obj, emission, "");
app->animating = EINA_TRUE;
}
static void
_on_bg_key_down(void *data, Evas *e EINA_UNUSED, Evas_Object *o EINA_UNUSED, void *event_info)
{
struct _App *app = data;
Evas_Event_Key_Down *ev = event_info;
if (!strcmp(ev->key, "h"))
{
fprintf(stdout, commands);
return;
}
// just moving the part and text
else if (!strcmp(ev->key, "Down"))
{
_part_move(app, 0, 1);
}
else if (!strcmp(ev->key, "Up"))
{
_part_move(app, 0, -1);
}
else if (!strcmp(ev->key, "Left"))
{
_part_move(app, -1, 0);
}
else if (!strcmp(ev->key, "Right"))
{
_part_move(app, 1, 0);
}
else if (!strcmp(ev->key, "Prior"))
{
_part_move(app, -1, -1);
}
else if (!strcmp(ev->key, "Next"))
{
_part_move(app, 1, 1);
}
// adjusting the perspective focal point distance
else if (!strcmp(ev->key, "KP_Add"))
{
app->focal += 5;
edje_perspective_set(app->ps, 240, 160, 0, app->focal);
edje_object_calc_force(app->edje_obj);
}
else if (!strcmp(ev->key, "KP_Subtract"))
{
app->focal -= 5;
if (app->focal < 5)
app->focal = 5;
edje_perspective_set(app->ps, 240, 160, 0, app->focal);
edje_object_calc_force(app->edje_obj);
}
// exiting
else if (!strcmp(ev->key, "Escape"))
ecore_main_loop_quit();
else
{
printf("unhandled key: %s\n", ev->key);
fprintf(stdout, commands);
}
}
static void
_animation_end_cb(void *data, Evas_Object *o EINA_UNUSED, const char *emission EINA_UNUSED, const char *source EINA_UNUSED)
{
struct _App *app = data;
app->animating = EINA_FALSE;
}
int
main(int argc EINA_UNUSED, char *argv[] EINA_UNUSED)
{
const char *edje_file = PACKAGE_DATA_DIR"/perspective.edj";
struct _App app;
Ecore_Evas *ee;
Evas *evas;
if (!ecore_evas_init())
return EXIT_FAILURE;
if (!edje_init())
goto shutdown_ecore_evas;
edje_frametime_set(1.0 / 60.0);
/* this will give you a window with an Evas canvas under the first
* engine available */
app.animating = EINA_FALSE;
app.x = 0;
app.y = 0;
app.focal = 50;
ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
if (!ee) goto shutdown_edje;
ecore_evas_callback_destroy_set(ee, _on_destroy);
ecore_evas_callback_resize_set(ee, _on_canvas_resize);
ecore_evas_title_set(ee, "Edje Box Example");
ecore_evas_data_set(ee, "app", &app);
evas = ecore_evas_get(ee);
app.bg = evas_object_rectangle_add(evas);
evas_object_color_set(app.bg, 255, 255, 255, 255);
evas_object_resize(app.bg, WIDTH, HEIGHT);
evas_object_focus_set(app.bg, EINA_TRUE);
evas_object_show(app.bg);
evas_object_event_callback_add(app.bg, EVAS_CALLBACK_KEY_DOWN, _on_bg_key_down, &app);
app.edje_obj = edje_object_add(evas);
edje_object_file_set(app.edje_obj, edje_file, "example/group");
evas_object_move(app.edje_obj, 0, 0);
evas_object_resize(app.edje_obj, WIDTH, HEIGHT);
evas_object_show(app.edje_obj);
edje_object_signal_callback_add(app.edje_obj, "animation,end", "", _animation_end_cb, &app);
app.ps = edje_perspective_new(evas);
edje_perspective_set(app.ps, 240, 160, 0, app.focal);
edje_perspective_global_set(app.ps, EINA_TRUE);
fprintf(stdout, commands);
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;
}