doFilter Method

Filters the data that corresponds to the specified column name and exclusive data indexes.

Syntax

Javascript (Usage)
Javascript (Specification)

var instance = new GcSpread.Slicer.GeneralSlicerData(data, columnNames);
var value; // Type: any
value = instance.doFilter(columnName, conditional, isPreview);

function doFilter( 
   columnName : string,
   conditional : object,
   isPreview : boolean
) : any;

Parameters

columnName: The column name.
conditional: The conditional filter. conditional.exclusiveRowIndexes: number array type, visible exclusive row indexes conditional.ranges: {min:number, max:number} array type, visible ranges.
isPreview: Indicates whether preview is set.

Example

This example creates a custom slicer.

Javascript

<!DOCTYPE html>
<html>
<head>
    <title>SpreadJS Sample</title>
    <link href="./css/gcspread.sheets.excel2013white.8.40.20151.0.css" rel="stylesheet" type="text/css" />
    <script src="./external/jquery-2.1.1.js" type="text/javascript"></script>
    <script src="./scripts/gcspread.sheets.all.8.40.20151.0.min.js"></script>

    <script type="text/javascript">
        //Define data source.
        columnNames = ["Name", "City", "Birthday"];
        data = [
            ["Bob", "NewYork", "1968/6/8"],
            ["Betty", "Washington", "1972/7/3"],
            ["Alice", "NewYork", "1964/3/2"]];

        //Define custom slicer.
        function MySlicer(container) {
            this.container = container;
            this.slicerData = null;
            this.columnName = null;
        }
        MySlicer.prototype.setData = function (slicerData, columnName) {
            this.slicerData = slicerData;
            this.columnName = columnName;
            this.slicerData.attachListener(this);
            this.onDataLoaded();
        }
        MySlicer.prototype.onDataLoaded = function () {
            //create slicer dom tree.
            var columnName = this.columnName,
            exclusiveData = this.slicerData.getExclusiveData(columnName);
            $(this.container).append($('<span>' + this.columnName + ':</span>' + '<br />'));
            var domString = "";
            for (var i = 0; i < exclusiveData.length; i++) {
                domString += '<input type="checkbox" name="' + columnName + '" value="' + exclusiveData[i] + '">';
                domString += '<span>' + exclusiveData[i] + '</span>';
                domString += '<br />';
            }
            $(this.container).append($(domString));
            //attach events to dom.
            var self = this;
            $("[name='" + self.columnName + "']").change(function () {
                var slicer = self,
                exclusiveData = slicer.slicerData.getExclusiveData(slicer.columnName),
                parent = $(this).parent(),
                items = parent.children(),
                indexes = [];
                for (var i = 0, length = items.length; i < length; i++) {
                    if (items[i].checked) {
                        var value = items[i].value;
                        if (!isNaN(parseInt(value))) {
                            value = parseInt(value);
                        }
                        indexes.push(exclusiveData.indexOf(value))
                    }
                }
                if (indexes.length === 0) {
                    slicer.slicerData.doUnfilter(slicer.columnName);
                } else {
                    slicer.slicerData.doFilter(slicer.columnName, { exclusiveRowIndexes: indexes });
                }
            });
        };
        MySlicer.prototype.onFiltered = function () {
            //The following is an example of showing the filtered result.
            var slicerdata = this.slicerData;
            var filteredRowIndexs = slicerdata.getFilteredRowIndexes();
            var trs = $listTable.find("tr");
            for (var i = 0; i < slicerdata.data.length; i++) {
                if (filteredRowIndexs.indexOf(i) !== -1) {
                    $(trs[i + 1]).show();
                } else {
                    $(trs[i + 1]).hide();
                }
            }
        }

        //Define the show filtered result method.
        function initFilteredResultList() {
            var tableStr = "<table border='1' cellpadding='0' cellspacing='0'><tr>";
            for (var i = 0; i < columnNames.length; i++) {
                tableStr += "<th>" + columnNames[i] + "</th>";
            }
            tableStr += "</tr>";
            for (var i = 0; i < data.length; i++) {
                tableStr += "<tr>";
                for (var j = 0; j < data[i].length; j++) {
                    tableStr += "<td>" + data[i][j] + "</td>";
                }
                tableStr += "</tr>";
            }
            tableStr += "</table>";
            $listTable = $(tableStr);
            $("#list").append($listTable);
        }

        $(document).ready(function () {
            //init filtered result list.
            initFilteredResultList();
            //create a custom slicer and add this slicer to the "slicerContainer" div.
            var slicer = new MySlicer($("#slicerContainer")[0]);
            var slicerData = new GcSpread.Slicer.GeneralSlicerData(data, columnNames);
            slicer.setData(slicerData, "Name");
        });
    </script>

</head>
<body>
    <div id="slicerContainer" style="border:1px solid gray;width:190px"></div>
    <hr/>
    <div id="list" style="width:300px;float:left"></div>
</body>
</html>

Reference

GeneralSlicerData type