-int AFBClient::requestSurface(const char *label)
-{
- printf("requestSurface(%s) -->\n", label);
- constexpr char const *verb = "request_surface";
- int ret = -1;
-
- json_object *jp = json_object_new_object();
- json_object_object_add(jp, "drawing_name", json_object_new_string(label));
-
- // std::experimental::optional look-alike
- struct optional {
- int value;
- bool is_not_set;
- };
-
- constexpr struct optional nullopt = {0, true};
- auto id = nullopt;
-
- /* send the request */
- int rc = afb_wsj1_call_j(
- wsj1, AFBClient::wmAPI, verb, jp,
- [](void *closure, afb_wsj1_msg *msg) {
- if (afb_wsj1_msg_is_reply_ok(msg)) {
- int id = json_object_get_int(
- json_object_object_get(afb_wsj1_msg_object_j(msg), "response"));
- auto oid = (optional *)closure;
- *oid = optional{id};
- } else
- fprintf(stderr, "wrong request surface reply received!\n");
- },
- (void *)&id);
-
- if (rc < 0) {
- fprintf(stderr, "calling %s/%s(%s) failed: %m\n", AFBClient::wmAPI, verb,
- json_object_to_json_string(jp));
- } else {
- // Lets make this call sync here...
- dispatch(-1);
-
- if (! id.is_not_set) {
- char *buf;
- asprintf(&buf, "%d", id.value);
- printf("setenv(\"QT_IVI_SURFACE_ID\", %s, 1)\n", buf);
- if (setenv("QT_IVI_SURFACE_ID", buf, 1) != 0) {
- fprintf(stderr, "putenv failed: %m\n");
- } else {
- ret = 0; // Single point of success
- }
- } else {
- fprintf(stderr, "Could not get surface ID from WM\n");
- }
- }
-
- printf("requestSurface(%s) = %d <--\n", label, ret);
-
- return ret;
-}