add example of container transformations

Change-Id: I12deb95dc908be8510fe8409e3aee107c6a3c6ec

diff --git a/src/examples/evas/evas-vg-container.c b/src/examples/evas/evas-vg-container.c
new file mode 100644 (file)
index 0000000..68b74f8
--- /dev/null
+++ b/src/examples/evas/evas-vg-container.c
@@ -0,0 +1,230 @@
+/**
+ * gcc -o evas-vg-container evas-vg-container.c `pkg-config --libs --cflags ecore ecore-evas`
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#else
+#define PACKAGE_EXAMPLES_DIR "."
+#endif
+
+#define WIDTH  400
+#define HEIGHT 400
+
+#include <Ecore.h>
+#include <Ecore_Evas.h>
+
+#define COLORS_PREMULT
+
+struct content
+{
+   Ecore_Evas  *ee;
+   Evas        *ev;
+   Evas_Object *bg;
+   Evas_Object *vg;
+   Efl_VG      *root;
+   Efl_VG      *container[2];
+};
+static struct content cnt;
+
+static void
+_on_delete(Ecore_Evas *ee EINA_UNUSED)
+{
+   ecore_main_loop_quit();
+}
+
+static void
+_canvas_resize_cb(Ecore_Evas *ee)
+{
+   int w, h;
+
+   ecore_evas_geometry_get(ee, NULL, NULL, &w, &h);
+   evas_object_resize(cnt.bg, w, h);
+   evas_object_resize(cnt.vg, w, h);
+}
+
+static void
+_add_transformation(Efl_VG *shape, Eina_Matrix3 *m)
+{
+   Eina_Matrix3 new_m;
+   const Eina_Matrix3 *old_m;
+
+   old_m = evas_vg_node_transformation_get(shape);
+   if (old_m)
+     {
+        eina_matrix3_compose(m, old_m, &new_m);
+        evas_vg_node_transformation_set(shape, &new_m);
+     }
+   else
+     {
+        evas_vg_node_transformation_set(shape, m);
+     }
+}
+
+static void
+_change_opacity(Efl_VG *vg_obj)
+{
+   int r, g, b, a;
+   evas_vg_node_color_get(vg_obj, &r, &g, &b, &a);
+#ifdef COLORS_PREMULT
+   evas_color_argb_unpremul(a, &r, &g, &b);
+#endif // COLORS_PREMULT
+   a = (a + 50) & 0xff;
+   if (a > 240) a = 255;
+   if (a < 20) a = 0;
+#ifdef COLORS_PREMULT
+   evas_color_argb_premul(a, &r, &g, &b);
+#endif // COLORS_PREMULT
+   evas_vg_node_color_set(vg_obj, r, g, b, a);
+   printf("Object's alpha chnnel was set to %d, rgb:%d/%d/%d\n", a, r,g,b);
+}
+
+static void
+_on_keydown(void        *data  EINA_UNUSED,
+            Evas        *evas  EINA_UNUSED,
+            Evas_Object *o,
+            void        *einfo)
+{
+   Evas_Event_Key_Down *ei = einfo;
+   Eina_Matrix3 m;
+
+   if ( *ei->key == 'q' )
+     {
+        _on_delete(cnt.ee);
+        return;
+     }
+   else if ( *ei->key == 'a' )
+     {
+        // doesn't work for container
+        _change_opacity(cnt.container[1]);
+        return;
+     }
+   else if (strcmp(ei->key, "t") == 0)
+     {
+        /* t - Translate the shapes +(10,10) */
+        eina_matrix3_identity(&m);
+        eina_matrix3_translate(&m, 10, 10);
+     }
+   else if (strcmp(ei->key, "T") == 0)
+     {
+        /* T - Translate the shapes -(10,10) */
+        eina_matrix3_identity(&m);
+        eina_matrix3_translate(&m, -10, -10);
+     }
+   else if (strcmp(ei->key, "r") == 0)
+     {
+        /* r - Rotate the shapes +10 degrees */
+        eina_matrix3_identity(&m);
+        eina_matrix3_rotate(&m, 10.0 * 2 * 3.141 / 360.0);
+     }
+   else if (strcmp(ei->key, "R") == 0)
+     {
+        /* R - Rotate the shapes -10 degrees */
+        eina_matrix3_identity(&m);
+        eina_matrix3_rotate(&m, -10.0 * 2 * 3.141 / 360.0);
+     }
+   else if (strcmp(ei->key, "s") == 0)
+     {
+        /* s - Scale the shapes +(.1, .1) */
+        eina_matrix3_identity(&m);
+        eina_matrix3_scale(&m, 1.1, 1.1);
+     }
+   else if (strcmp(ei->key, "S") == 0)
+     {
+        /* S - Scale the shapes -(.1, .1) */
+        eina_matrix3_identity(&m);
+        eina_matrix3_scale(&m, .9, .9);
+     }
+   else
+      return;
+
+   _add_transformation(cnt.container[0], &m);
+}
+
+static void
+_draw_shapes()
+{
+   // Container with red shapes
+   cnt.container[0] = evas_vg_container_add(cnt.root);
+
+   Efl_VG *shape = evas_vg_shape_add(cnt.container[0]);
+   evas_vg_shape_append_rect(shape, 100, 100, 100, 100, 0, 0);
+   evas_vg_node_color_set(shape, 255, 0, 0, 255);
+
+   shape = evas_vg_shape_add(cnt.container[0]);
+   evas_vg_shape_append_circle(shape, 200, 200, 50);
+   evas_vg_node_color_set(shape, 255, 0, 0, 255);
+
+   // Container with blue shapes
+   cnt.container[1] = evas_vg_container_add(cnt.root);
+
+   shape = evas_vg_shape_add(cnt.container[1]);
+   evas_vg_shape_append_rect(shape, 200, 200, 100, 100, 0, 0);
+   evas_vg_node_color_set(shape, 0, 0, 255, 255);
+
+   shape = evas_vg_shape_add(cnt.container[1]);
+   evas_vg_shape_append_circle(shape, 300, 300, 50);
+   evas_vg_node_color_set(shape, 0, 0, 255, 255);
+}
+
+static void
+_print_info()
+{
+   printf("Container 0 - Red shapes\n");
+   printf("Container 1 - Blue shapes\n");
+   printf("-------------------------\n");
+   printf("a - change opacity of container 1\n");
+   printf("t/T - Translate container 0 by +/- 10\n");
+   printf("r/R - Rotatate container 0 by +/- 10 degree\n");
+   printf("s/S - Scale container 0 by +/- 0.1\n");
+}
+
+static int
+_init_win()
+{
+   if (!ecore_evas_init()) return EXIT_FAILURE;
+
+   cnt.ee = ecore_evas_new(NULL, 0, 0, WIDTH, HEIGHT, NULL);
+   if ( ! cnt.ee )
+     {
+        ecore_evas_shutdown();
+        return -1;
+     }
+
+   ecore_evas_callback_delete_request_set(cnt.ee, _on_delete);
+   ecore_evas_callback_resize_set(cnt.ee, _canvas_resize_cb);
+   ecore_evas_show(cnt.ee);
+
+   cnt.ev = ecore_evas_get(cnt.ee);
+   cnt.bg = evas_object_rectangle_add(cnt.ev);
+   evas_object_color_set(cnt.bg, 255, 255, 255, 255);
+   evas_object_focus_set(cnt.bg, EINA_TRUE);
+   evas_object_show(cnt.bg);
+
+   evas_object_event_callback_add(cnt.bg, EVAS_CALLBACK_KEY_DOWN, _on_keydown, NULL);
+
+   cnt.vg = evas_object_vg_add(cnt.ev);
+   evas_object_show(cnt.vg);
+
+   cnt.root = evas_vg_container_add(cnt.vg);
+   evas_object_vg_root_node_set(cnt.vg, cnt.root);
+
+   _canvas_resize_cb(cnt.ee);
+
+   return 0;
+}
+
+int
+main(void)
+{
+   int err = _init_win();
+   if (err != 0) return err;
+
+   _draw_shapes();
+   _print_info();
+
+   ecore_main_loop_begin();
+   ecore_evas_shutdown();
+
+   return 0;
+}

diff --git a/src/examples/evas/meson.build b/src/examples/evas/meson.build
index d8102c4..f021ac6 100644 (file)
--- a/src/examples/evas/meson.build
+++ b/src/examples/evas/meson.build
@@ -30,6 +30,7 @@ examples = [
   'evas-text',
   'evas-transparent',
   'evas-vg-cmd-equal',
+  'evas-vg-container',
   'evas-vg-current',
   'evas-vg-interpolation',
   'evas-vg-star-path',