Method SetJsonValue

src/effects/Tracker.cpp:207–288

Load Json::Value into this object

// Load Json::Value into this object
void Tracker::SetJsonValue(const Json::Value root) {

	// Set parent data
	EffectBase::SetJsonValue(root);

	if (!root["BaseFPS"].isNull()) {
		if (!root["BaseFPS"]["num"].isNull())
			BaseFPS.num = root["BaseFPS"]["num"].asInt();
		if (!root["BaseFPS"]["den"].isNull())
			BaseFPS.den = root["BaseFPS"]["den"].asInt();
	}

	if (!root["TimeScale"].isNull()) {
		TimeScale = root["TimeScale"].asDouble();
	}

	if (!root["protobuf_data_path"].isNull()) {
		std::string new_path = root["protobuf_data_path"].asString();
		if (protobuf_data_path != new_path || trackedData->GetLength() == 0) {
			protobuf_data_path = new_path;
			if (!trackedData->LoadBoxData(protobuf_data_path)) {
				std::clog << "Invalid protobuf data path " << protobuf_data_path << '\n';
				protobuf_data_path.clear();
			}
			else {
				// prefix "<effectUUID>-<index>" for each entry
				for (auto& kv : trackedObjects) {
					auto idx = kv.first;
					auto ptr = kv.second;
					if (ptr) {
						std::string prefix = this->Id();
						if (!prefix.empty())
							prefix += "-";
						ptr->Id(prefix + std::to_string(idx));
					}
				}
			}
		}
	}

	// then any per-object JSON overrides...
	if (!root["objects"].isNull()) {
		// Iterate over the supplied objects (indexed by id or position)
		const auto memberNames = root["objects"].getMemberNames();
		for (const auto& name : memberNames)
		{
			// Determine the numeric index of this object
			int index = -1;
			bool numeric_key = std::all_of(name.begin(), name.end(), ::isdigit);
			if (numeric_key) {
				index = std::stoi(name);
			}
			else
			{
				size_t pos = name.find_last_of('-');
				if (pos != std::string::npos) {
					try {
						index = std::stoi(name.substr(pos + 1));