efl

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