首页
学习
活动
专区
工具
TVP
发布
社区首页 >问答首页 >如何使用gridstack.js设置本地存储中的小部件数据

如何使用gridstack.js设置本地存储中的小部件数据
EN

Stack Overflow用户
提问于 2018-06-19 00:07:23
回答 1查看 3.7K关注 0票数 1

场景

我有一个仪表板与一些小部件分组到选项卡中,用户可以点击通过。小部件具有默认的起始位置,包括高度和宽度,但是如果用户移动它们或调整它们的大小(使用gridstack.js),我会将新的小部件数据保存到本地存储。

如果用户在选项卡之间单击,新的小部件位置将保持不变。

问题

当用户刷新页面时,将加载默认的小部件位置,而不是本地存储中的数据。我试着用getWidgetData()设置新的位置,但是没有成功。

我已经检查了我的grid-layout数据的本地存储,新的位置已经存在。

代码示例

下面是Codepen,因为我认为它需要allow-same-origin,从而打破了代码片段。

// Initialize zurb foundation
$(document).foundation();

$(function() {
  var grid = $('.grid-stack').data('gridstack');

  var options = {
    cellHeight: 40,
    verticalMargin: 28,
    animate: false,
  };

  // Initialize grid-stack widgets
  widgetsInit = function(options) {
    $('.grid-stack').gridstack(options);
    getWidgetData(); // Find and set positions from local storage
  }

  updateVisibleWidgetHeights = function(options) {
    var targetPanel = '.tabs-panel.is-active';

    $(targetPanel + ' .grid-stack .grid-stack-item').each(function(i){
      $(targetPanel + ' .grid-stack').data('gridstack').resize(
        $(targetPanel + ' .grid-stack .grid-stack-item')[i],
        $($(targetPanel + ' .grid-stack .grid-stack-item')[i]).attr('data-gs-width'),
        Math.ceil(($(targetPanel + ' .grid-stack .grid-stack-item .grid-stack-item-content')[i].scrollHeight + $(targetPanel + ' .grid-stack').data('gridstack').opts.verticalMargin) / ($(targetPanel + ' .grid-stack').data('gridstack').cellHeight() + $(targetPanel + ' .grid-stack').data('gridstack').opts.verticalMargin))
      );
    });
  }

  updateAllWidgetHeights = function(options) {
    $('.grid-stack .grid-stack-item').each(function(i){
      $('.grid-stack').data('gridstack').resize(
        $('.grid-stack .grid-stack-item')[i],
        $($('.grid-stack .grid-stack-item')[i]).attr('data-gs-width'),
        Math.ceil(($('.grid-stack .grid-stack-item .grid-stack-item-content')[i].scrollHeight + $('.grid-stack').data('gridstack').opts.verticalMargin) / ($('.grid-stack').data('gridstack').cellHeight() + $('.grid-stack').data('gridstack').opts.verticalMargin))
      );
    });
  }

  getWidgetData = function() {
    // // Load from local storage
    var serialization = null;
    if (serialization = localStorage.getItem("grid-layout")) {
      _.each(JSON.parse(serialization), function (node) {
        // Update each widget's properties from values in storage
        $('.grid-stack-item[data-custom-id='+ node.id +']').attr({
          'data-gs-x': node.x,
          'data-gs-y': node.y,
          'data-gs-width': node.width,
          'data-gs-height': node.height,
        });
      });
    } else {
      console.log("There was no local storage data to read")
    }
  }

  widgetsInit(options);
  updateVisibleWidgetHeights();

  $('.grid-stack').on('change', function (event, items) {
    // Save data to local storage
    var res = _.map($('.grid-stack .grid-stack-item'), function (el) {
      el = $(el);
      node = el.data('_gridstack_node');
      return {
        // Grab widget properties
        id: el.attr('data-custom-id'),
        x: node.x,
        y: node.y,
        width: node.width,
        height: node.height
      };
    });
    localStorage.setItem("grid-layout", JSON.stringify(res))
  });

  // On tab change update widget heights to the height of the content they contain
  $(document).on('change.zf.tabs', function() {
    updateVisibleWidgetHeights();
  })
});
.grid-stack > .grid-stack-item > .grid-stack-item-content {
    background-color: #fff;
    cursor: move;
    border: 1px solid #e3e3e3;
    border-radius: 4px;
	padding: 1rem;
}
<link href="https://cdnjs.cloudflare.com/ajax/libs/gridstack.js/0.4.0/gridstack.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.4.3/css/foundation.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.10/lodash.min.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/gridstack.js/0.4.0/gridstack.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/gridstack.js/0.4.0/gridstack.jQueryUI.min.js'></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/foundation/6.4.3/js/foundation.min.js"></script>


<ul class="tabs" data-tabs id="example-tabs" data-deep-link="true" data-update-history="true" data-match-height="false">
  <li class="tabs-title is-active"><a href="#panel1" aria-selected="true">Tab 1</a></li>
  <li class="tabs-title"><a href="#panel2">Tab 2</a></li>
</ul>

<div class="tabs-content unstyled" data-tabs-content="example-tabs">
  <div class="tabs-panel is-active" id="panel1">
    <div class="grid-stack">
      <div class="grid-stack-item" data-gs-x="0" data-gs-y="0" data-gs-width="4" data-gs-height="2">
        <div class="grid-stack-item-content">#1</div>
      </div>
      <div class="grid-stack-item" data-gs-x="4" data-gs-y="0" data-gs-width="4" data-gs-height="2">
        <div class="grid-stack-item-content">#2</div>
      </div>
      <div class="grid-stack-item" data-gs-x="8" data-gs-y="0"data-gs-width="4" data-gs-height="2">
        <div class="grid-stack-item-content">#3</div>
      </div>
    </div>
  </div>
  <div class="tabs-panel" id="panel2">
    <div class="grid-stack">
      <div class="grid-stack-item" data-gs-x="0" data-gs-y="0" data-gs-width="4" data-gs-height="2">
        <div class="grid-stack-item-content">#4</div>
      </div>
      <div class="grid-stack-item" data-gs-x="4" data-gs-y="0" data-gs-width="4" data-gs-height="2">
        <div class="grid-stack-item-content">#5</div>
      </div>
      <div class="grid-stack-item" data-gs-x="8" data-gs-y="0" data-gs-width="4" data-gs-height="2">
        <div class="grid-stack-item-content">#6</div>
      </div>
    </div>
  </div>
</div>

EN

回答 1

Stack Overflow用户

回答已采纳

发布于 2018-06-19 02:53:50

你需要调查几件事。

可用的默认示例是单个实例,而您有多个实例。

您将一次性保存和加载gridstack,这意味着您无法跟踪元素grid-stack-item,也无法跟踪哪个点属于第一个选项卡或第二个选项卡。

因此,即使你让它工作,它也会尝试将所有6个不同的小部件定位在第一个选项卡中,而不是加载到各自的选项卡中。

因此,您需要对以下内容进行更改

使用id tabs-cotnainer.在conatiner中添加idcustom-data-id属性,以便它们在grid-stack-items中具有唯一的标签

在网格堆栈的事件更改中,您应该创建json对象,该对象包含专用于存储选项卡的部分中的点,如下所示。

{
  "items": {
    "panel1": [
      {
        "id": "panel1-item1",
        "x": 0,
        "y": 0,
        "width": 4,
        "height": 2
      },
      {
        "id": "panel1-item2",
        "x": 4,
        "y": 0,
        "width": 4,
        "height": 2
      },
      {
        "id": "panel1-item3",
        "x": 8,
        "y": 0,
        "width": 4,
        "height": 2
      }
    ],
    "panel2": [
      {
        "id": "panel2-item1",
        "x": 0,
        "y": 0,
        "width": 4,
        "height": 2
      },
      {
        "id": "panel2-item2",
        "x": 4,
        "y": 0,
        "width": 4,
        "height": 2
      },
      {
        "id": "panel2-item3",
        "x": 8,
        "y": 0,
        "width": 4,
        "height": 2
      }
    ]
  }
}

替换为以下内容

$('.grid-stack').on('change', function (event, items) {
    let tabs = $('#tabs-container >ul >li');
    let totalTabs = $('#tabs-container >ul >li').length;

    let storagePositions = {
        items: {}
    };
    $.each(tabs, function (index, elem) {
        let panel = $(elem).find('a').attr('href').replace("#", '');
        let stackItems = $('#' + panel + ' .grid-stack .grid-stack-item');

        storagePositions.items[panel] = _.map(stackItems, function (el) {

            el = $(el);
            node = el.data('_gridstack_node');
            //console.log(node);

            return { // Grab widget properties
                id: el.attr('data-custom-id'),
                x: node.x,
                y: node.y,
                width: node.width,
                height: node.height
            };
        });
    });

    // Save data to local storage
    localStorage.setItem("grid-layout", JSON.stringify(storagePositions))
});

,然后以类似的方式加载选项卡。

getWidgetData = function () {

    // // Load from local storage
    var serialization = null;
    let tabs = $('#tabs-container >ul >li');
    let totalTabs = $('#tabs-container >ul >li').length;

    if (localStorage.getItem("grid-layout") !== null) {

        serialization = JSON.parse(localStorage.getItem("grid-layout"));



        $.each(tabs, function (index, elem) {
            let panel = $(elem).find('a').attr('href').replace('#', '');
            let myGrid = $('#' + panel + ' .grid-stack').data('gridstack')

            var items = GridStackUI.Utils.sort(serialization.items[panel]);
            _.each(items, function (node) {

                myGrid.update($('div[data-custom-id="' + node.id + '"]'),
                    node.x, node.y, node.width, node.height);
            });
        });
    } else {
        console.log("There was no local storage data to read")
    }
}

更新后的HTML将如下所示

<div id="tabs-container">
    <ul class="tabs dashboard-tabs" data-tabs id="example-tabs" data-deep-link="true" data-update-history="true" data-match-height="false">
        <li class="tabs-title is-active">
            <a href="#panel1" aria-selected="true">Tab 1</a>
        </li>
        <li class="tabs-title">
            <a href="#panel2">Tab 2</a>
        </li>
    </ul>

    <div class="tabs-content unstyled" data-tabs-content="example-tabs">
        <div class="tabs-panel is-active" id="panel1">
            <div class="grid-stack">
                <div class="grid-stack-item" data-custom-id="panel1-item1" data-gs-x="0" data-gs-y="0" data-gs-width="4" data-gs-height="2">
                    <div class="grid-stack-item-content">#1</div>
                </div>
                <div class="grid-stack-item" data-custom-id="panel1-item2" data-gs-x="4" data-gs-y="0" data-gs-width="4" data-gs-height="2">
                    <div class="grid-stack-item-content">#2</div>
                </div>
                <div class="grid-stack-item" data-custom-id="panel1-item3" data-gs-x="8" data-gs-y="0" data-gs-width="4" data-gs-height="2">
                    <div class="grid-stack-item-content">#3</div>
                </div>
            </div>
        </div>
        <div class="tabs-panel" id="panel2">
            <div class="grid-stack">
                <div class="grid-stack-item" data-custom-id="panel2-item1" data-gs-x="0" data-gs-y="0" data-gs-width="4" data-gs-height="2">
                    <div class="grid-stack-item-content">#4</div>
                </div>
                <div class="grid-stack-item" data-custom-id="panel2-item2" data-gs-x="4" data-gs-y="0" data-gs-width="4" data-gs-height="2">
                    <div class="grid-stack-item-content">#5</div>
                </div>
                <div class="grid-stack-item" data-custom-id="panel2-item3" data-gs-x="8" data-gs-y="0" data-gs-width="4" data-gs-height="2">
                    <div class="grid-stack-item-content">#6</div>
                </div>
            </div>
        </div>
    </div>
</div>

在这里查看上的完整工作演示,您可以在这两个选项卡中更新职位,然后尝试刷新页面,它将显示更新后的职位。

注意:只需通过在脚本顶部编写localStorage.removeItem("grid-layout")来删除之前的值一次,然后在第一次运行后删除此行。

票数 2
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接:

https://stackoverflow.com/questions/50913511

复制
相关文章

相似问题

领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档