253 lines
6.7 KiB
C
253 lines
6.7 KiB
C
/**
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* Simple Evas example illustrating aspect control hints on objects.
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*
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* You'll need at least one engine built for it (excluding the buffer
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* one) and the png image loader also built. See stdout/stderr for
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* output.
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*
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* You'll also need @b Edje for this one, as it has the only smart
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* object implementing aspect control for children.
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*
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* @verbatim
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* edje_cc aspect.edc
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* gcc -o evas-aspect-hints evas-aspect-hints.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 PACKAGE_EXAMPLES_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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#include <stdio.h>
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#include <errno.h>
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#include "evas-common.h"
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#define WIDTH 320
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#define HEIGHT 480
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static const char *border_img_path = PACKAGE_EXAMPLES_DIR EVAS_IMAGE_FOLDER "/red.png";
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static const char *edje_file_path = PACKAGE_EXAMPLES_DIR "/aspect.edj";
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struct test_data
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{
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Ecore_Evas *ee;
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Evas *canvas;
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Evas_Object *bg, *rect, *container, *border;
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};
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static struct test_data d = {0};
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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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_canvas_resize_cb(Ecore_Evas *ee)
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{
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int w, h;
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ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
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evas_object_resize(d.bg, w, h);
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}
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static const char *
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_get_aspect_name(Evas_Aspect_Control aspect)
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{
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switch (aspect)
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{
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case 0:
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return "NONE";
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case 1:
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return "NEITHER";
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case 2:
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return "HORIZONTAL";
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case 3:
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return "VERTICAL";
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case 4:
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return "BOTH";
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default:
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return "INVALID";
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}
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}
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static void
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_on_keydown(void *data EINA_UNUSED,
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Evas *evas EINA_UNUSED,
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Evas_Object *o,
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void *einfo)
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{
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const Evas_Modifier *mods;
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Evas_Event_Key_Down *ev = einfo;
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mods = evas_key_modifier_get(evas_object_evas_get(o));
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if (evas_key_modifier_is_set(mods, "Shift") &&
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strcmp(ev->key, "h") == 0) /* print help */
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{
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fprintf(stdout, "commands are:\n"
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"\tc - cycle aspect control on object\n"
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"\th - change horizontal aspect component\n"
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"\tv - change vertical aspect component\n"
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"\ts - print current object's status\n"
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"\tH - print help\n");
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return;
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}
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if (strcmp(ev->key, "s") == 0) /* get aspect status of the obj */
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{
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Evas_Coord w, h;
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Evas_Aspect_Control aspect;
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evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
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fprintf(stdout, "Object has aspect %s, with horizontal compontent %d"
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" and vertical compontent %d\n",
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_get_aspect_name(aspect), w, h);
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return;
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}
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if (strcmp(ev->key, "c") == 0) /* cycle aspect control on obj */
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{
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Evas_Coord w, h;
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Evas_Aspect_Control aspect;
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evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
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aspect = (aspect + 1) % 5;
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evas_object_size_hint_aspect_set(d.rect, aspect, w, h);
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fprintf(stdout, "Changing aspect control to %s\n",
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_get_aspect_name(aspect));
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return;
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}
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if (strcmp(ev->key, "h") == 0) /* change horizontal aspect component */
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{
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Evas_Coord w, h;
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Evas_Aspect_Control aspect;
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evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
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w = (w + 1) % 3;
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evas_object_size_hint_aspect_set(d.rect, aspect, w, h);
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fprintf(stdout, "Changing horizontal aspect component to %d\n", w);
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return;
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}
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if (strcmp(ev->key, "v") == 0) /* change vertical aspect component */
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{
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Evas_Coord w, h;
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Evas_Aspect_Control aspect;
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evas_object_size_hint_aspect_get(d.rect, &aspect, &w, &h);
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h = (h + 1) % 3;
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evas_object_size_hint_aspect_set(d.rect, aspect, w, h);
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fprintf(stdout, "Changing vertical aspect component to %d\n", h);
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return;
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}
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}
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int
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main(void)
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{
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Eina_Bool ret;
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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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return EXIT_FAILURE;
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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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d.ee = ecore_evas_new(NULL, 10, 10, WIDTH, HEIGHT, NULL);
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if (!d.ee)
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goto error;
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ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb);
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ecore_evas_show(d.ee);
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/* the canvas pointer, de facto */
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d.canvas = ecore_evas_get(d.ee);
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d.bg = evas_object_rectangle_add(d.canvas);
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evas_object_color_set(d.bg, 255, 255, 255, 255); /* white bg */
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evas_object_move(d.bg, 0, 0); /* at canvas' origin */
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evas_object_resize(d.bg, WIDTH, HEIGHT); /* covers full canvas */
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evas_object_show(d.bg);
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evas_object_focus_set(d.bg, EINA_TRUE);
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evas_object_event_callback_add(
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d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
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d.container = edje_object_add(d.canvas);
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ret = edje_object_file_set(d.container, edje_file_path, "main");
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if (!ret)
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{
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Edje_Load_Error err = edje_object_load_error_get(d.container);
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const char *msg = edje_load_error_str(err);
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fprintf(stderr, "could not load 'main' from %s: %s",
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edje_file_path, msg);
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goto panic;
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}
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evas_object_move(d.container, (WIDTH / 4), (HEIGHT / 4));
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evas_object_resize(d.container, (WIDTH / 2), (HEIGHT / 2));
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evas_object_show(d.container);
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d.rect = evas_object_rectangle_add(d.canvas);
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evas_object_color_set(d.rect, 0, 0, 255, 255);
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evas_object_size_hint_aspect_set(d.rect, EVAS_ASPECT_CONTROL_NONE, 1, 1);
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evas_object_show(d.rect);
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edje_object_part_swallow(d.container, "content", d.rect);
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evas_object_smart_changed(d.container);
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/* this is a border around the edje object, container of the
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* rectangle we are going to experiment with (change its aspect
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* hints). this way you can see how their sizes relate */
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d.border = evas_object_image_filled_add(d.canvas);
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evas_object_image_file_set(d.border, border_img_path, NULL);
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evas_object_image_border_set(d.border, 3, 3, 3, 3);
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evas_object_image_border_center_fill_set(d.border, EVAS_BORDER_FILL_NONE);
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evas_object_move(d.border, (WIDTH / 4) - 3, (HEIGHT / 4) - 3);
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evas_object_resize(d.border, (WIDTH / 2) + 6, (HEIGHT / 2) + 6);
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evas_object_show(d.border);
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ecore_main_loop_begin();
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ecore_evas_free(d.ee);
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ecore_evas_shutdown();
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edje_shutdown();
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return 0;
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error:
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fprintf(stderr, "you got to have at least one evas engine built and linked"
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" up to ecore-evas for this example to run properly.\n");
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panic:
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ecore_evas_free(d.ee);
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ecore_evas_shutdown();
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edje_shutdown();
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return -1;
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}
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