2012-11-14 12:12:53 -08:00
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/**
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* Simple Evas example illustrating basic objects manipulation.
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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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* @verbatim
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* gcc -o evas-object-manipulation evas-object-manipulation.c `pkg-config --libs --cflags ecore evas ecore-evas`
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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 <stdio.h>
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#include <errno.h>
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#define WIDTH (320)
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#define HEIGHT (240)
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static const char *img_path = PACKAGE_EXAMPLES_DIR "/enlightenment.png";
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static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png";
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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 *img, *bg, *clipper, *clipper_border, *text;
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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 void
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2012-12-30 17:40:50 -08:00
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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 EINA_UNUSED,
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2012-11-14 12:12:53 -08:00
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void *einfo)
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{
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Evas_Event_Key_Down *ev = einfo;
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2014-01-03 20:25:21 -08:00
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if (strcmp(ev->key, "h") == 0) /* print help */
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2012-11-14 12:12:53 -08:00
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{
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fprintf(stdout, "commands are:\n"
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"\to - change clipper's opacity\n"
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"\tr - toggle clipper's color between red and white\n"
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"\tc - toggle clipper's clipping function\n"
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"\tv - toggle clipper's visibility\n");
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return;
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}
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2014-01-03 20:25:21 -08:00
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if (strcmp(ev->key, "o") == 0) /* change clipper's opacity */
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2012-11-14 12:12:53 -08:00
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{
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int alpha, r, g, b;
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evas_object_color_get(d.clipper, &r, &g, &b, &alpha);
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2013-11-22 15:07:14 -08:00
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evas_color_argb_unpremul(alpha, &r, &g, &b);
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2012-11-14 12:12:53 -08:00
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alpha -= 20;
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if (alpha < 0)
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alpha = 255;
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2013-11-22 15:07:14 -08:00
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evas_color_argb_premul(alpha, &r, &g, &b);
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2012-11-14 12:12:53 -08:00
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evas_object_color_set(d.clipper, r, g, b, alpha);
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fprintf(stdout, "Changing clipper's opacity: %d%%\n",
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(int)((alpha / 255.0) * 100));
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return;
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}
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2014-01-03 20:25:21 -08:00
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if (strcmp(ev->key, "r") == 0) /* toggle clipper's color
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2012-11-14 12:12:53 -08:00
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* between red and white */
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{
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int alpha, r, g, b;
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fprintf(stdout, "Changing clipper's color to");
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evas_object_color_get(d.clipper, &r, &g, &b, &alpha);
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2013-11-22 15:07:14 -08:00
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evas_color_argb_unpremul(alpha, &r, &g, &b);
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2012-11-14 12:12:53 -08:00
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if (g > 0)
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{
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fprintf(stdout, "red\n");
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g = b = 0;
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}
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else
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{
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fprintf(stdout, "white\n");
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g = b = 255;
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}
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2013-11-22 15:07:14 -08:00
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evas_color_argb_premul(alpha, &r, &g, &b);
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2012-11-14 12:12:53 -08:00
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evas_object_color_set(d.clipper, r, g, b, alpha);
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return;
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}
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2014-01-03 20:25:21 -08:00
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if (strcmp(ev->key, "c") == 0) /* toggle clipper's clipping function */
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2012-11-14 12:12:53 -08:00
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{
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fprintf(stdout, "Toggling clipping ");
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if (evas_object_clip_get(d.img) == d.clipper)
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{
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evas_object_clip_unset(d.img);
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fprintf(stdout, "off\n");
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}
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else
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{
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evas_object_clip_set(d.img, d.clipper);
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fprintf(stdout, "on\n");
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}
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return;
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}
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2014-01-03 20:25:21 -08:00
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if (strcmp(ev->key, "v") == 0) /* toggle clipper's visibility */
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2012-11-14 12:12:53 -08:00
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{
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fprintf(stdout, "Clipper is now ");
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if (evas_object_visible_get(d.clipper))
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{
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evas_object_hide(d.clipper);
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fprintf(stdout, "hidden\n");
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}
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else
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{
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evas_object_show(d.clipper);
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fprintf(stdout, "visible\n");
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}
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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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int err;
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if (!ecore_evas_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_name_set(d.bg, "background rectangle");
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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.img = evas_object_image_filled_add(d.canvas);
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evas_object_image_file_set(d.img, img_path, NULL);
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err = evas_object_image_load_error_get(d.img);
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if (err != EVAS_LOAD_ERROR_NONE)
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{
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goto panic;
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}
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else
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{
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evas_object_move(d.img, 0, 0);
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evas_object_resize(d.img, WIDTH, HEIGHT);
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evas_object_show(d.img);
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fprintf(stdout, "Image object added, type is: %s\n",
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evas_object_type_get(d.img));
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}
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/* border on the image's clipper, here just to emphasize its position */
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d.clipper_border = evas_object_image_filled_add(d.canvas);
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evas_object_image_file_set(d.clipper_border, border_img_path, NULL);
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err = evas_object_image_load_error_get(d.clipper_border);
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if (err != EVAS_LOAD_ERROR_NONE)
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{
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goto panic;
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}
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else
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{
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evas_object_image_border_set(d.clipper_border, 3, 3, 3, 3);
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evas_object_image_border_center_fill_set(
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d.clipper_border, EVAS_BORDER_FILL_NONE);
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evas_object_move(d.clipper_border, (WIDTH / 4) - 3, (HEIGHT / 4) - 3);
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evas_object_resize(
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d.clipper_border, (WIDTH / 2) + 6, (HEIGHT / 2) + 6);
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evas_object_show(d.clipper_border);
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}
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/* solid white clipper (note that it's the default color for a
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* rectangle) - it won't change clippees' colors, then (multiplying
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* by 255) */
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d.clipper = evas_object_rectangle_add(d.canvas);
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evas_object_move(d.clipper, WIDTH / 4, HEIGHT / 4);
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evas_object_resize(d.clipper, WIDTH / 2, HEIGHT / 2);
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evas_object_clip_set(d.img, d.clipper);
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evas_object_show(d.clipper);
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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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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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return -1;
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}
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