309 lines
9.0 KiB
C
309 lines
9.0 KiB
C
/**
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* Simple Evas example illustrating some image objects functions
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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/saver also built. See stdout/stderr
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* for output.
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*
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* @verbatim
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* gcc -o evas-images2 evas-images2.c `pkg-config --libs --cflags evas ecore 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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#include "evas-common.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 EVAS_IMAGE_FOLDER "/enlightenment.png";
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static const char *commands = \
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"commands are:\n"
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"\tp - change proxy image's source\n"
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"\ts - print noise image's stride value\n"
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"\ta - save noise image to disk (/tmp dir)\n"
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"\tv - change source visibility\n"
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"\te - enable/disable source events\n"
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"\th - print help\n";
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const char *file_path = "/tmp/evas-images2-example.png";
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const char *quality_str = "quality=100";
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struct test_data
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{
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Ecore_Evas *ee;
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Evas *evas;
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Evas_Object *logo, *noise_img, *proxy_img, *bg;
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};
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static struct test_data d = {0};
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static void
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_mouse_down(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Mouse_Down *ev = event_info;
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printf("Mouse Down - obj(%p), coords(%d %d)\n", obj, ev->canvas.x,
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ev->canvas.y);
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}
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static void
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_mouse_move(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Mouse_Move *ev = event_info;
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printf("Mouse Move - obj(%p), coords(%d %d)\n", obj, ev->cur.canvas.x,
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ev->cur.canvas.y);
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}
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static void
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_mouse_up(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Mouse_Up *ev = event_info;
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printf("Mouse Up - obj(%p), coords(%d %d)\n", obj, ev->canvas.x,
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ev->canvas.y);
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}
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static void
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_multi_down(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Multi_Down *ev = event_info;
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printf("Multi Down - obj(%p), coords(%d %d)\n", obj, ev->canvas.x,
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ev->canvas.y);
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}
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static void
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_multi_move(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Multi_Move *ev = event_info;
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printf("Multi Move - obj(%p), coords(%d %d)\n", obj, ev->cur.canvas.x,
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ev->cur.canvas.y);
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}
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static void
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_multi_up(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Multi_Up *ev = event_info;
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printf("Multi Up - obj(%p), coords(%d %d)\n", obj, ev->canvas.x,
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ev->canvas.y);
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}
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static void
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_mouse_in(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Mouse_In *ev = event_info;
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printf("Mouse In - obj(%p), coords(%d %d)\n", obj, ev->canvas.x,
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ev->canvas.y);
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}
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static void
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_mouse_out(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Mouse_Out *ev = event_info;
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printf("Mouse Out - obj(%p), coords(%d %d)\n", obj, ev->canvas.x,
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ev->canvas.y);
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}
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static void
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_hold(void *data EINA_UNUSED, Evas *e EINA_UNUSED, Evas_Object *obj,
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void *event_info)
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{
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Evas_Event_Hold *ev = event_info;
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printf("Hold - obj(%p), hold(%d)\n", obj, ev->hold);
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}
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static void
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_on_preloaded(void *data EINA_UNUSED,
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Evas *e EINA_UNUSED,
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Evas_Object *obj EINA_UNUSED,
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void *event_info EINA_UNUSED)
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{
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fprintf(stdout, "Image has been pre-loaded!\n");
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}
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static void
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_on_destroy(Ecore_Evas *ee EINA_UNUSED)
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{
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ecore_main_loop_quit();
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}
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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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_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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void *einfo)
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{
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Evas_Event_Key_Down *ev = einfo;
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if (strcmp(ev->key, "h") == 0) /* print help */
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{
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puts(commands);
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return;
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}
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if (strcmp(ev->key, "s") == 0) /* print proxy image' stride value */
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{
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int stride = evas_object_image_stride_get(d.noise_img);
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fprintf(stdout, "Image has row stride value of %d, which accounts"
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" for %d pixels\n", stride, stride / 4);
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return;
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}
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if (strcmp(ev->key, "p") == 0) /* change proxy's source */
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{
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Evas_Object *source = evas_object_image_source_get(d.proxy_img);
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if (source == d.logo) source = d.noise_img;
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else source = d.logo;
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evas_object_image_source_set(d.proxy_img, source);
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fprintf(stdout, "Proxy image's source changed\n");
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return;
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}
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if (strcmp(ev->key, "a") == 0) /* save noise image to disk */
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{
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if (!evas_object_image_save(d.noise_img, file_path, NULL, quality_str))
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fprintf(stderr, "Cannot save image to '%s' (flags '%s')\n",
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file_path, quality_str);
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else
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fprintf(stdout, "Image saved to '%s' (flags '%s'), check it out with "
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"an image viewer\n", file_path, quality_str);
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return;
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}
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if (strcmp(ev->key, "v") == 0) /* change source visibility */
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{
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Eina_Bool src_visible =
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evas_object_image_source_visible_get(d.proxy_img);
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evas_object_image_source_visible_set(d.proxy_img, !src_visible);
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return;
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}
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if (strcmp(ev->key, "e") == 0) /* change source events */
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{
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Eina_Bool src_events = evas_object_image_source_events_get(d.proxy_img);
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evas_object_image_source_events_set(d.proxy_img, !src_events);
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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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unsigned int i;
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unsigned int pixels[(WIDTH / 4) * (HEIGHT / 4)];
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srand(time(NULL));
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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_destroy_set(d.ee, _on_destroy);
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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.evas = ecore_evas_get(d.ee);
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d.bg = evas_object_rectangle_add(d.evas);
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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.logo = evas_object_image_filled_add(d.evas);
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evas_object_event_callback_add(
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d.logo, EVAS_CALLBACK_IMAGE_PRELOADED, _on_preloaded, NULL);
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evas_object_image_preload(d.logo, EINA_TRUE);
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evas_object_image_file_set(d.logo, img_path, NULL);
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evas_object_resize(d.logo, WIDTH / 2, HEIGHT / 2);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MOUSE_DOWN, _mouse_down, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MOUSE_MOVE, _mouse_move, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MOUSE_UP, _mouse_up, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MOUSE_IN, _mouse_in, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MOUSE_OUT, _mouse_out, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MULTI_DOWN, _multi_down, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MULTI_UP, _multi_up, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_MULTI_MOVE, _multi_move, 0);
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evas_object_event_callback_add(d.logo, EVAS_CALLBACK_HOLD, _hold, 0);
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evas_object_show(d.logo);
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/* creating noise image */
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for (i = 0; i < sizeof(pixels) / sizeof(pixels[0]); i++)
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pixels[i] = rand();
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d.noise_img = evas_object_image_add(d.evas);
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evas_object_image_size_set(d.noise_img, WIDTH / 4, HEIGHT / 4);
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evas_object_image_data_set(d.noise_img, pixels);
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evas_object_image_filled_set(d.noise_img, EINA_TRUE);
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evas_object_move(d.noise_img, (WIDTH * 3) / 4, 0);
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evas_object_resize(d.noise_img, WIDTH / 4, HEIGHT / 4);
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evas_object_show(d.noise_img);
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fprintf(stdout, "Creating noise image with size %d, %d\n",
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WIDTH / 4, HEIGHT / 4);
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d.proxy_img = evas_object_image_filled_add(d.evas);
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evas_object_image_source_set(d.proxy_img, d.logo);
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evas_object_move(d.proxy_img, WIDTH / 4, HEIGHT / 2);
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evas_object_resize(d.proxy_img, WIDTH / 2, HEIGHT / 2);
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evas_object_show(d.proxy_img);
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puts(commands);
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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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ecore_evas_shutdown();
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return -1;
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}
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