Program Listing for File QuantityInput.h

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/*
 * Copyright (c) 2024-2026 Karana Dynamics Pty Ltd. All rights reserved.
 *
 * NOTICE TO USER:
 *
 * This source code and/or documentation (the "Licensed Materials") is
 * the confidential and proprietary information of Karana Dynamics Inc.
 * Use of these Licensed Materials is governed by the terms and conditions
 * of a separate software license agreement between Karana Dynamics and the
 * Licensee ("License Agreement"). Unless expressly permitted under that
 * agreement, any reproduction, modification, distribution, or disclosure
 * of the Licensed Materials, in whole or in part, to any third party
 * without the prior written consent of Karana Dynamics is strictly prohibited.
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#pragma once

#include "Karana/WebUI/Router.h"
#include "Karana/WebUI/Widget.h"
#include <functional>

namespace Karana::WebUI {

    /**
     * @brief Widget displaying two HTML `input` elements: one for inputting numeric quantities, and
     * one for a units string.
     *
     * Uses a single State object with a numeric field `value` and a string field `units`.
     *
     */
    class QuantityInput : public Widget {
      public:
        /**
         * @brief QuantityInput constructor
         * @param router The connection router to use
         * @param text The text displayed in the QuantityInput
         * @param on_change Called when the QuantityInput is modified
         * @param quantity_state State for synchronizing the QuantityInput's value
         */
        QuantityInput(Router &router,
                      std::string_view text,
                      std::function<void(double, std::string_view)> on_change = {},
                      const Karana::Core::ks_ptr<State> &quantity_state = nullptr);

        /**
         * @brief QuantityInput destructor
         */
        virtual ~QuantityInput();

      private:
        /// Callback to run whenever the value or units change
        std::function<void(double, std::string_view)> _on_change;
    };
} // namespace Karana::WebUI