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. --- .../evas/src/examples/evas-object-manipulation.c | 235 +++++++++++++++++++++ 1 file changed, 235 insertions(+) create mode 100644 libraries/evas/src/examples/evas-object-manipulation.c (limited to 'libraries/evas/src/examples/evas-object-manipulation.c') diff --git a/libraries/evas/src/examples/evas-object-manipulation.c b/libraries/evas/src/examples/evas-object-manipulation.c new file mode 100644 index 0000000..e9c9442 --- /dev/null +++ b/libraries/evas/src/examples/evas-object-manipulation.c @@ -0,0 +1,235 @@ +/** + * Simple Evas example illustrating basic objects manipulation. + * + * 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-object-manipulation evas-object-manipulation.c `pkg-config --libs --cflags ecore evas 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 *img_path = PACKAGE_EXAMPLES_DIR "/enlightenment.png"; +static const char *border_img_path = PACKAGE_EXAMPLES_DIR "/red.png"; + +struct test_data +{ + Ecore_Evas *ee; + Evas *canvas; + Evas_Object *img, *bg, *clipper, *clipper_border, *text; +}; + +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 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 are:\n" + "\to - change clipper's opacity\n" + "\tr - toggle clipper's color between red and white\n" + "\tc - toggle clipper's clipping function\n" + "\tv - toggle clipper's visibility\n"); + return; + } + + if (strcmp(ev->keyname, "o") == 0) /* change clipper's opacity */ + { + int alpha, r, g, b; + + evas_object_color_get(d.clipper, &r, &g, &b, &alpha); + alpha -= 20; + if (alpha < 0) + alpha = 255; + + evas_object_color_set(d.clipper, r, g, b, alpha); + + fprintf(stdout, "Changing clipper's opacity: %d%%\n", + (int)((alpha / 255.0) * 100)); + return; + } + + if (strcmp(ev->keyname, "r") == 0) /* toggle clipper's color + * between red and white */ + { + int alpha, r, g, b; + + fprintf(stdout, "Changing clipper's color to"); + + evas_object_color_get(d.clipper, &r, &g, &b, &alpha); + if (g > 0) + { + fprintf(stdout, "red\n"); + g = b = 0; + } + else + { + fprintf(stdout, "white\n"); + g = b = 255; + } + + evas_object_color_set(d.clipper, r, g, b, alpha); + return; + } + + if (strcmp(ev->keyname, "c") == 0) /* toggle clipper's clipping function */ + { + fprintf(stdout, "Toggling clipping "); + + if (evas_object_clip_get(d.img) == d.clipper) + { + evas_object_clip_unset(d.img); + fprintf(stdout, "off\n"); + } + else + { + evas_object_clip_set(d.img, d.clipper); + fprintf(stdout, "on\n"); + } + return; + } + + if (strcmp(ev->keyname, "v") == 0) /* toggle clipper's visibility */ + { + fprintf(stdout, "Clipper is now "); + + if (evas_object_visible_get(d.clipper)) + { + evas_object_hide(d.clipper); + fprintf(stdout, "hidden\n"); + } + else + { + evas_object_show(d.clipper); + fprintf(stdout, "visible\n"); + } + 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_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_name_set(d.bg, "background rectangle"); + 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.img = evas_object_image_filled_add(d.canvas); + evas_object_image_file_set(d.img, img_path, NULL); + err = evas_object_image_load_error_get(d.img); + if (err != EVAS_LOAD_ERROR_NONE) + { + goto panic; + } + else + { + evas_object_move(d.img, 0, 0); + evas_object_resize(d.img, WIDTH, HEIGHT); + evas_object_show(d.img); + + fprintf(stdout, "Image object added, type is: %s\n", + evas_object_type_get(d.img)); + } + + /* border on the image's clipper, here just to emphasize its position */ + d.clipper_border = evas_object_image_filled_add(d.canvas); + evas_object_image_file_set(d.clipper_border, border_img_path, NULL); + err = evas_object_image_load_error_get(d.clipper_border); + if (err != EVAS_LOAD_ERROR_NONE) + { + goto panic; + } + else + { + evas_object_image_border_set(d.clipper_border, 3, 3, 3, 3); + evas_object_image_border_center_fill_set( + d.clipper_border, EVAS_BORDER_FILL_NONE); + evas_object_move(d.clipper_border, (WIDTH / 4) - 3, (HEIGHT / 4) - 3); + evas_object_resize( + d.clipper_border, (WIDTH / 2) + 6, (HEIGHT / 2) + 6); + evas_object_show(d.clipper_border); + } + + /* solid white clipper (note that it's the default color for a + * rectangle) - it won't change clippees' colors, then (multiplying + * by 255) */ + d.clipper = evas_object_rectangle_add(d.canvas); + evas_object_move(d.clipper, WIDTH / 4, HEIGHT / 4); + evas_object_resize(d.clipper, WIDTH / 2, HEIGHT / 2); + evas_object_clip_set(d.img, d.clipper); + evas_object_show(d.clipper); + + 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"); +panic: + ecore_evas_free(d.ee); + ecore_evas_shutdown(); + return -1; +} -- cgit v1.1