evas-aspect-hints.c

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evas-aspect-hints.c
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define PACKAGE_EXAMPLES_DIR "."
#endif
#include <Ecore.h>
#include <Ecore_Evas.h>
#include <Edje.h>
#include <stdio.h>
#include <errno.h>
#include "evas-common.h"
#define WIDTH 320
#define HEIGHT 480
static const char *border_img_path = PACKAGE_EXAMPLES_DIR EVAS_IMAGE_FOLDER "/red.png";
static const char *edje_file_path = PACKAGE_EXAMPLES_DIR "/aspect.edj";
struct test_data
{
Ecore_Evas *ee;
Evas *canvas;
Evas_Object *bg, *rect, *container, *border;
};
static struct test_data d = {0};
/* here just to keep our example's window size and background image's
* size in synchrony */
static void
_canvas_resize_cb(Ecore_Evas *ee)
{
int w, h;
ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
evas_object_resize(d.bg, w, h);
}
static const char *
_get_aspect_name(Evas_Aspect_Control aspect)
{
switch (aspect)
{
case 0:
return "NONE";
case 1:
return "NEITHER";
case 2:
return "HORIZONTAL";
case 3:
return "VERTICAL";
case 4:
return "BOTH";
default:
return "INVALID";
}
}
static void
_on_keydown(void *data EINA_UNUSED,
Evas *evas EINA_UNUSED,
Evas_Object *o,
void *einfo)
{
const Evas_Modifier *mods;
Evas_Event_Key_Down *ev = einfo;
mods = evas_key_modifier_get(evas_object_evas_get(o));
if (evas_key_modifier_is_set(mods, "Shift") &&
strcmp(ev->key, "h") == 0) /* print help */
{
fprintf(stdout, "commands are:\n"
"\tc - cycle aspect control on object\n"
"\th - change horizontal aspect component\n"
"\tv - change vertical aspect component\n"
"\ts - print current object's status\n"
"\tH - print help\n");
return;
}
if (strcmp(ev->key, "s") == 0) /* get aspect status of the obj */
{
Evas_Coord w, h;
Evas_Aspect_Control aspect;
evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
fprintf(stdout, "Object has aspect %s, with horizontal compontent %d"
" and vertical compontent %d\n",
_get_aspect_name(aspect), w, h);
return;
}
if (strcmp(ev->key, "c") == 0) /* cycle aspect control on obj */
{
Evas_Coord w, h;
Evas_Aspect_Control aspect;
evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
aspect = (aspect + 1) % 5;
evas_object_size_hint_aspect_set(d.rect, aspect, w, h);
fprintf(stdout, "Changing aspect control to %s\n",
_get_aspect_name(aspect));
return;
}
if (strcmp(ev->key, "h") == 0) /* change horizontal aspect component */
{
Evas_Coord w, h;
Evas_Aspect_Control aspect;
evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
w = (w + 1) % 3;
evas_object_size_hint_aspect_set(d.rect, aspect, w, h);
fprintf(stdout, "Changing horizontal aspect component to %d\n", w);
return;
}
if (strcmp(ev->key, "v") == 0) /* change vertical aspect component */
{
Evas_Coord w, h;
Evas_Aspect_Control aspect;
evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
h = (h + 1) % 3;
evas_object_size_hint_aspect_set(d.rect, aspect, w, h);
fprintf(stdout, "Changing vertical aspect component to %d\n", h);
return;
}
}
int
main(void)
{
Eina_Bool ret;
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 */
d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
if (!d.ee)
goto error;
ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
ecore_evas_show(d.ee);
/* the canvas pointer, de facto */
d.canvas = ecore_evas_get(d.ee);
d.bg = evas_object_rectangle_add(d.canvas);
evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
evas_object_move(d.bg, 0, 0); /* at canvas' origin */
evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
evas_object_show(d.bg);
evas_object_focus_set(d.bg, EINA_TRUE);
evas_object_event_callback_add(
d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
d.container = edje_object_add(d.canvas);
ret = edje_object_file_set(d.container, edje_file_path, "main");
if (!ret)
{
Edje_Load_Error err = edje_object_load_error_get(d.container);
const char *msg = edje_load_error_str(err);
fprintf(stderr, "could not load 'main' from %s: %s",
edje_file_path, msg);
goto panic;
}
evas_object_move(d.container, (WIDTH / 4), (HEIGHT / 4));
evas_object_resize(d.container, (WIDTH / 2), (HEIGHT / 2));
evas_object_show(d.container);
d.rect = evas_object_rectangle_add(d.canvas);
evas_object_color_set(d.rect, 0, 0, 255, 255);
evas_object_size_hint_aspect_set(d.rect, EVAS_ASPECT_CONTROL_NONE, 1, 1);
evas_object_show(d.rect);
edje_object_part_swallow(d.container, "content", d.rect);
evas_object_smart_changed(d.container);
/* this is a border around the edje object, container of the
* rectangle we are going to experiment with (change its aspect
* hints). this way you can see how their sizes relate */
d.border = evas_object_image_filled_add(d.canvas);
evas_object_image_file_set(d.border, border_img_path, NULL);
evas_object_image_border_set(d.border, 3, 3, 3, 3);
evas_object_image_border_center_fill_set(d.border, EVAS_BORDER_FILL_NONE);
evas_object_move(d.border, (WIDTH / 4) - 3, (HEIGHT / 4) - 3);
evas_object_resize(d.border, (WIDTH / 2) + 6, (HEIGHT / 2) + 6);
evas_object_show(d.border);
ecore_main_loop_begin();
ecore_evas_free(d.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");
panic:
ecore_evas_free(d.ee);
ecore_evas_shutdown();
edje_shutdown();
return -1;
}