From dd7595a3475407a7fa96a97393bae8c5220e8762 Mon Sep 17 00:00:00 2001 From: David Walter Seikel Date: Wed, 4 Jan 2012 18:41:13 +1000 Subject: Add the base Enlightenment Foundation Libraries - eina, eet, evas, ecore, embryo, and edje. Note that embryo wont be used, but I'm not sure yet if you can build edje without it. --- libraries/evas/src/examples/evas-images.c | 353 ++++++++++++++++++++++++++++++ 1 file changed, 353 insertions(+) create mode 100644 libraries/evas/src/examples/evas-images.c (limited to 'libraries/evas/src/examples/evas-images.c') diff --git a/libraries/evas/src/examples/evas-images.c b/libraries/evas/src/examples/evas-images.c new file mode 100644 index 0000000..a8cf3c4 --- /dev/null +++ b/libraries/evas/src/examples/evas-images.c @@ -0,0 +1,353 @@ +/** + * Simple Evas example illustrating some image objects functions + * + * You'll need at least one engine built for it (excluding the buffer + * one) and the png image loader also built. See stdout/stderr for + * output. + * + * @verbatim + * gcc -o evas-images evas-images.c `pkg-config --libs --cflags evas ecore ecore-evas` + * @endverbatim + */ + +#ifdef HAVE_CONFIG_H + +#include "config.h" +#else + +#define PACKAGE_EXAMPLES_DIR "." +#define __UNUSED__ + +#endif + +#include +#include +#include +#include + +#define WIDTH (320) +#define HEIGHT (240) + +static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png"; +static const char *valid_path = PACKAGE_EXAMPLES_DIR "/enlightenment.png"; +static const char *bogus_path = "/tmp/non-existent-220986.png"; +static const char *commands = \ + "commands are:\n" + "\tx - change image's x fill coordinate\n" + "\ty - change image's y fill coordinate\n" + "\tw - change image's w fill size\n" + "\te - change image's h fill size\n" + "\tf - toggle image filled property (overrides fill)\n" + "\ta - toggle image's alpha channel usage\n" + "\tm - toggle border's smooth scaling\n" + "\tt - change border's thickness\n" + "\tb - change border's center region aspect\n" + "\tc - change border's scaling factor\n" + "\ts - print image's fill property status\n" + "\th - print help\n"; + +struct test_data +{ + Ecore_Evas *ee; + Evas *evas; + Evas_Object *img1, *img2, *bg, *border; +}; + +static struct test_data d = {0}; + +static void +_on_destroy(Ecore_Evas *ee __UNUSED__) +{ + ecore_main_loop_quit(); +} + +/* 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 * +_border_fill_mode_to_str(Evas_Border_Fill_Mode mode) +{ + switch (mode) + { + case EVAS_BORDER_FILL_NONE: + return "none"; + + case EVAS_BORDER_FILL_DEFAULT: + return "default"; + + case EVAS_BORDER_FILL_SOLID: + return "solid"; + + default: + return "invalid"; + } +} + +static void +_on_keydown(void *data __UNUSED__, + Evas *evas __UNUSED__, + Evas_Object *o __UNUSED__, + void *einfo) +{ + Evas_Event_Key_Down *ev = einfo; + + if (strcmp(ev->keyname, "h") == 0) /* print help */ + { + fprintf(stdout, commands); + return; + } + + if (strcmp(ev->keyname, "m") == 0) /* toggle border image's smooth scaling */ + { + Eina_Bool smooth_scale = evas_object_image_smooth_scale_get(d.border); + + evas_object_image_smooth_scale_set(d.border, !smooth_scale); + + fprintf(stdout, "Image's border is now %s smooth scaling\n", + smooth_scale ? "without" : "with"); + + return; + } + + if (strcmp(ev->keyname, "t") == 0) /* change border's thickness */ + { + int l, r, t, b; + + evas_object_image_border_get(d.border, &l, &r, &t, &b); + + l = (l + 3) % 9; + r = (r + 3) % 9; + t = (t + 3) % 9; + b = (b + 3) % 9; + + evas_object_image_border_set(d.border, l, r, t, b); + + fprintf(stdout, "Image's border thickness is now %d\n", l); + + return; + } + + if (strcmp(ev->keyname, "c") == 0) /* change border's scaling factor */ + { + double scale = evas_object_image_border_scale_get(d.border); + + scale *= 2; + if (scale > 4.0) scale = 1.0; + + evas_object_image_border_scale_set(d.border, scale); + + fprintf(stdout, "Image's border scaling factor is now %f\n", scale); + + return; + } + + if (strcmp(ev->keyname, "b") == 0) /* change border's center + * region's aspect */ + { + Eina_Bool fill = \ + evas_object_image_border_center_fill_get(d.border); + + fill = (fill + 1) % 3; + + evas_object_image_border_center_fill_set(d.border, fill); + + fprintf(stdout, "Image's border center region aspect is now \"%s\"\n", + _border_fill_mode_to_str(fill)); + + return; + } + + if (strcmp(ev->keyname, "a") == 0) /* toggle alpha channel usage */ + { + Eina_Bool alpha = evas_object_image_alpha_get(d.img1); + + evas_object_image_alpha_set(d.img1, !alpha); + + fprintf(stdout, "Image's alpha channel is now %s\n", + alpha ? "off" : "on"); + + return; + } + + if (strcmp(ev->keyname, "f") == 0) /* toggle filled property */ + { + Eina_Bool filled = evas_object_image_filled_get(d.img1); + + evas_object_image_filled_set(d.img1, !filled); + + fprintf(stdout, "Image's x filled property is now %s\n", + filled ? "off" : "on"); + + return; + } + + if (strcmp(ev->keyname, "x") == 0) /* change x fill coordinate */ + { + Evas_Coord x, y, w, h; + + evas_object_image_fill_get(d.img1, &x, &y, &w, &h); + x = (x + 20) % (WIDTH / 2); + evas_object_image_fill_set(d.img1, x, y, w, h); + + fprintf(stdout, "Image's x fill coordinate changed to %d\n", x); + + return; + } + + if (strcmp(ev->keyname, "y") == 0) /* change y fill coordinate */ + { + Evas_Coord x, y, w, h; + + evas_object_image_fill_get(d.img1, &x, &y, &w, &h); + y = (y + 20) % (HEIGHT / 2); + evas_object_image_fill_set(d.img1, x, y, w, h); + + fprintf(stdout, "Image's y fill coordinate changed to %d\n", y); + + return; + } + + if (strcmp(ev->keyname, "w") == 0) /* change w fill size */ + { + Evas_Coord x, y, w, h; + + evas_object_image_fill_get(d.img1, &x, &y, &w, &h); + if (w == (WIDTH / 4)) w = (WIDTH / 2); + else if (w == WIDTH / 2) w = WIDTH; + else w = (WIDTH / 4); + evas_object_image_fill_set(d.img1, x, y, w, h); + + fprintf(stdout, "Image's w fill size changed to %d\n", w); + + return; + } + + if (strcmp(ev->keyname, "e") == 0) /* change h fill size */ + { + Evas_Coord x, y, w, h; + + evas_object_image_fill_get(d.img1, &x, &y, &w, &h); + if (h == (HEIGHT / 4)) h = (HEIGHT / 2); + else if (h == HEIGHT / 2) h = HEIGHT; + else h = (HEIGHT / 4); + evas_object_image_fill_set(d.img1, x, y, w, h); + + fprintf(stdout, "Image's h fill size changed to %d\n", h); + + return; + } + + if (strcmp(ev->keyname, "s") == 0) /* status */ + { + Evas_Coord x, y, w, h; + + evas_object_image_fill_get(d.img1, &x, &y, &w, &h); + + fprintf(stdout, "Image has fill properties set to: %d, %d, %d, %d\n", + x, y, w, h); + + return; + } +} + +int +main(void) +{ + int err; + + if (!ecore_evas_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_destroy_set(d.ee, _on_destroy); + ecore_evas_callback_resize_set(d.ee, _canvas_resize_cb); + ecore_evas_show(d.ee); + + /* the canvas pointer, de facto */ + d.evas = ecore_evas_get(d.ee); + + d.bg = evas_object_rectangle_add(d.evas); + 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); + + d.img1 = evas_object_image_add(d.evas); + evas_object_image_file_set(d.img1, valid_path, NULL); + err = evas_object_image_load_error_get(d.img1); + if (err != EVAS_LOAD_ERROR_NONE) + { + fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n", + valid_path, evas_load_error_str(err)); + } + else + { + fprintf(stdout, + "loaded image '%s' with succes! error string is \"%s\"\n", + valid_path, evas_load_error_str(err)); + + evas_object_move(d.img1, 3, 3); + evas_object_image_fill_set(d.img1, 0, 0, WIDTH / 2, HEIGHT / 2); + evas_object_resize(d.img1, WIDTH / 2, HEIGHT / 2); + evas_object_show(d.img1); + + evas_object_focus_set(d.bg, EINA_TRUE); + evas_object_event_callback_add( + d.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL); + } + + /* this is a border around the image above, here just to emphasize + * its geometry */ + d.border = evas_object_image_filled_add(d.evas); + 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, 0, 0); + evas_object_resize(d.border, (WIDTH / 2) + 6, (HEIGHT / 2) + 6); + evas_object_show(d.border); + + /* image loading will fail for this one -- unless one cheats and + * puts a valid image on that path */ + d.img2 = evas_object_image_add(d.evas); + evas_object_image_file_set(d.img2, bogus_path, NULL); + err = evas_object_image_load_error_get(d.img2); + if (err != EVAS_LOAD_ERROR_NONE) + { + fprintf(stderr, "could not load image '%s': error string is \"%s\"\n", + bogus_path, evas_load_error_str(err)); + } + else + { + evas_object_move(d.img2, WIDTH / 2, HEIGHT / 2); + evas_object_image_fill_set(d.img2, 0, 0, WIDTH / 2, HEIGHT / 2); + evas_object_resize(d.img2, WIDTH / 2, HEIGHT / 2); + evas_object_show(d.img2); + } + + fprintf(stdout, commands); + ecore_main_loop_begin(); + + ecore_evas_free(d.ee); + ecore_evas_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"); + ecore_evas_shutdown(); + return -1; +} -- cgit v1.1