Popup Column Picker

You can easily implement a column-picker UI by using the grid's columns property, a ListBox control, and C1 MVC's showPopup and hidePopup methods.

For example, the grid below loads with an auto-generated set of columns. Click the gear icon at the top-left cell to show a ListBox where you can select the columns you want to display.

You can use the grid's columnLayout property to allow users to save and restore column layouts. Click the buttons below to see how this works.

// This file locates: "Scripts/Lesson/C1Mvc/WijmoShowPopup.js".
c1.documentReady(function () {
    // generate some random data
    var data = [],
      countries = ['US', 'Germany', 'UK', 'Japan', 'Italy', 'Greece'],
      products = ['Widget', 'Sprocket', 'Gadget', 'Doohickey'],
      colors = ['Black', 'White', 'Red', 'Green', 'Blue'],
      dt = new Date();
    for (var i = 0; i < 100; i++) {
        var date = new Date(dt.getFullYear(), i % 12, 25, i % 24, i % 60, i % 60),
          countryId = Math.floor(Math.random() * countries.length),
          productId = Math.floor(Math.random() * products.length),
          colorId = Math.floor(Math.random() * colors.length);
        var item = {
            id: i,
            start: date,
            end: date,
            country: countries[countryId],
            product: products[productId],
            color: colors[colorId],
            countryId: countryId,
            productId: productId,
            colorId: colorId,
            amount1: Math.random() * 10000 - 5000,
            amount2: Math.random() * 10000 - 5000,
            amount3: Math.random() * 10000 - 5000,
            amount4: Math.random() * 10000 - 5000,
            amount5: Math.random() * 10000 - 5000,
            discount: Math.random() / 4,
            active: i % 4 == 0
        };
        data.push(item);
    }

    var theGrid = wijmo.Control.getControl('#theGrid');
    theGrid.itemsSource = data;
    theGrid.formatItem.addHandler(function (s, e) {
        if (e.panel == s.topLeftCells) {
            e.cell.innerHTML = '<span class="column-picker-icon glyphicon glyphicon-cog"></span>';
        }
    });

    var theColumnPicker = wijmo.Control.getControl('#theColumnPicker');
    theColumnPicker.initialize({
        itemsSource: theGrid.columns,
        checkedMemberPath: 'visible',
        displayMemberPath: 'header',
        lostFocus: function () {
            wijmo.hidePopup(theColumnPicker.hostElement);
        }
    });

    // show the column picker when the user clicks the top-left cell
    var ref = theGrid.hostElement.querySelector('.wj-topleft');
    ref.addEventListener('mousedown', function (e) {
        if (wijmo.hasClass(e.target, 'column-picker-icon')) {
            wijmo.showPopup(theColumnPicker.hostElement, ref, false, true, false);
            theColumnPicker.focus();
            e.preventDefault();
        }
    });

    // save/restore layout buttons
    document.getElementById('btnSave').addEventListener('click', function () {
        localStorage.setItem('myLayout', theGrid.columnLayout);
    });
    document.getElementById('btnRestore').addEventListener('click', function () {
        var layout = localStorage.getItem('myLayout');
        if (layout) {
            theGrid.columnLayout = layout;
        }
    });
});

// This file locates: "Content/css/Lesson/C1Mvc/WijmoShowPopup.css".
.column-picker {
  columns: 3;
  padding: 12px;
  margin-left: 12px;
  margin-top: 26px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
}
.column-picker-icon {
  cursor: pointer;
  color: #FF8754;
  margin: 3px;
}

using System.Web.Mvc;

namespace LearnMvcClient.Controllers
{
    public partial class C1MvcController : Controller
    {
        // GET: WijmoShowPopup
        public ActionResult WijmoShowPopup()
        {
            return View();
        }
    }
}

<h1>
    @Html.Raw(Resources.C1Mvc.WijmoShowPopup_Title)
</h1>
<p>
    @Html.Raw(Resources.C1Mvc.WijmoShowPopup_Text1)
</p>
<p>
    @Html.Raw(Resources.C1Mvc.WijmoShowPopup_Text2)
</p>
@Html.C1().FlexGrid().Id("theGrid").Height(300)
<div style="display:none">
    @Html.C1().ListBox().Id("theColumnPicker").CssClass("column-picker")
</div>

<p>
    @Html.Raw(Resources.C1Mvc.WijmoShowPopup_Text3)
</p>
<button id="btnSave" class="btn btn-default">
    @Html.Raw(Resources.C1Mvc.WijmoShowPopup_Text4)
</button>
<button id="btnRestore" class="btn btn-default">
    @Html.Raw(Resources.C1Mvc.WijmoShowPopup_Text5)
</button>