{% extends 'index.html' %}
{% load static %}
{% block content %}
    <!-- Sales Chart Start -->
    <div class="container-fluid pt-4 px-4">
        <div class="row g-4">
            <div class="col-sm-12 col-xl-6" style="width: 100%">
                <div class="bg-secondary text-center rounded p-4">
                    <div class="d-flex align-items-center justify-content-between mb-4">
                        <h6 class="mb-0">原图像</h6>
                        <a href="mb-0">保存</a>
                    </div>
                    <img src="{% static 'img/a.png' %}" style="width: 50%" class="border border-info">

                </div>
            </div>
            <form method="post">
                {% csrf_token %}
                <button type="submit" class="btn btn-outline-primary m-2" style="width: 100%">
                    点击进行分段线性变化对直方图修改,分三段函数进行线性变化
                </button>
            </form>

            <div class="col-sm-12 col-xl-6" style="width: 100%">
                <div class="bg-secondary text-center rounded p-4">
                    <div class="d-flex align-items-center justify-content-between mb-4">
                        <h6 class="mb-0">下图是由matplotlib.pyplot库绘制而成</h6>
                        <a href="">保存</a>
                    </div>
                    {% if h %}
                        修改前：
                        <img src="data:image/jpg;base64,{{ h }}" class="border border-info mb-2" width="100%">
                        修改后：
                        <img src="data:image/jpg;base64,{{ i }}" class="border border-info mb-2" width="100%">

                    {% else %}
                        <div style="width: 100%;height: 188px;display: flex;align-content: center;align-items: center;justify-items: center;justify-content: center">
                            <div>暂时还未有输出图片</div>
                        </div>
                    {% endif %}

                </div>
            </div>
        </div>
    </div>
    <!-- Sales Chart End -->


{% endblock %}
{% block js %}
    <script type="text/javascript">
        function getFileUrl(sourceId) {
            var url;
            if (navigator.userAgent.indexOf("MSIE") >= 1) { // IE
                url = document.getElementById(sourceId).value;
            } else if (navigator.userAgent.indexOf("Firefox") > 0) { // Firefox
                url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));
            } else if (navigator.userAgent.indexOf("Chrome") > 0) { // Chrome
                url = window.URL.createObjectURL(document.getElementById(sourceId).files.item(0));
            }
            return url;
        }

        function preImg(sourceId, targetId) {
            var url = getFileUrl(sourceId);
            var imgPre = document.getElementById(targetId);
            imgPre.src = url;
        }
    </script>
    <script>

    </script>

{% endblock %}