1 files changed, 353 insertions, 0 deletions

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 <Ecore.h>
+#include <Ecore_Evas.h>
+#include <stdio.h>
+#include <errno.h>
+
+#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;
+}