table filter

    工作需要写了一个表格的过虑类,使用了mootools.js.

filtertable = {
    init:function(){
        if (arguments.callee.done) {return;}
        arguments.callee.done = true;
        $each($(document.body).getElements('table.filterable'), function(table, index) {filtertable.makeFilterable(table);});
    },
    makeFilterable:function(table){
        var tHead = table.getElement('thead');
        var tBody = table.getElement('tbody');
        if (tHead.rows.length === 0) {return;}
        if (tBody.rows.length === 0) {return;}

        var headrow = (tHead.rows.length > 1 ? tHead.rows[1].cells : tHead.rows[0].cells);
        var filters = new Hash();
        $each(headrow, function(cell, index){
            var filter = $(cell).getElement('select.filter');
            if(filter){
                filters.set(index, {'filter':filter, 'cellIndex':index});
            }
        });
        filters.each(function(data, key){
            data.filter.addEvent('change', filtertable.filterChange.pass(data.cellIndex, {'filters':filters, 'table': table, 'tHead': tHead, 'tBody': tBody}));
        });
    },
    filterChange:function(cellIndex){
        var filters = this.filters.getValues();
        var tBody = this.tBody;
        var rows = tBody.rows;
        $each(rows, function(row){
            var hide = false;
            for(var i=0; i<filters.length; i++){
                var data = filters[i];
                if(data.filter.value !== null && data.filter.value !== ''){
                    if(row.cells[data.cellIndex].innerHTML != data.filter.value){
                        hide = true;
                        break;
                    }
                }
            }
            if(hide) {
                $(row).hide();
            }else{
                $(row).show();
            }
            hide = false;
        });
    }
};

window.addEvent('domready', function() {filtertable.init();});