libeek: add eek_keyboard_find_key_by_position().

eek/eek-section.c

@@ -438,3 +438,26 @@ eek_section_find_key_by_keycode (EekSection *section,
     return EEK_SECTION_GET_CLASS(section)->find_key_by_keycode (section,
                                                                 keycode);
 }
+
+EekKey *
+eek_section_find_key_by_position (EekSection *section,
+                                  gdouble     x,
+                                  gdouble     y)
+{
+    gint angle;
+    EekBounds bounds;
+    EekPoint point;
+    EekElement *key;
+
+    eek_element_get_bounds (EEK_ELEMENT(section), &bounds);
+    point.x = x - bounds.x;
+    point.y = y - bounds.y;
+    angle = eek_section_get_angle (section);
+    eek_point_rotate (&point, -angle);
+    key = eek_container_find_by_position (EEK_CONTAINER(section),
+                                          point.x + bounds.x,
+                                          point.y + bounds.y);
+    if (!key)
+        return NULL;
+    return EEK_KEY(key);
+}