1 files changed, 235 insertions, 0 deletions

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