角度UI网格过滤器标头单元格样式？

Question

I'm working Angular UI-Grid, and exactly with filtering. All functions works fine, and now I'm working on styling.

What I'm trying to achieve is instead of this view

I want to get this view

So as you can see I just want to make range filter in one line. All my searches in internet have been failed. I have found some sort of info for a date picker range, but I believe it should be much simpler, just add some css rule to one columns.

I can impact on row thru cellClass and I have tried to impact in same way thru headerCellClass but it doesn't work. Is it any way to impact on this header without creating any custom templates? Thanks in advance.

My column definition:

  $scope.gridOptions.columnDefs = [
        {
            displayName: 'Name',
            field: 'name',
            width: '20%',
            cellClass: getCellClass
        },
        {
            field: 'description',
            width: '30%',
            cellClass: getCellClass
        },
        {
            field: 'strict',
            filter: {
                type: uiGridConstants.filter.SELECT,
                selectOptions: [
                    {value: true, label: 'strict'},
                    {value: false, label: 'non-strict'}
                ]
            },
            cellClass: getCellClass
        },
        {
            displayName: 'Length',
            field: 'maxSize',
            filters: [
                {
                    name: 'From',
                    condition: uiGridConstants.filter.GREATER_THAN_OR_EQUAL,
                    placeholder: "from"
                },
                {
                    name: 'To',
                    condition: uiGridConstants.filter.LESS_THAN_OR_EQUAL,
                    placeholder: "to"

                }
            ],
            headerCellClass: $scope.highlightFilteredHeader,
            cellClass: getCellClass
        },
        {
            field: 'Actions',
            cellClass: getCellClass,
            cellTemplate: "includes/grid/columnAction.html"
        }
    ];


  $scope.highlightFilteredHeader = function (row, rowRenderIndex, col, colRenderIndex) {
                return 'ui-grid-header-custom';
        };

this is plunker where you can find my problem

Answer 1

I have found way to impact on it, I have added custom class and thru this class I can impact on inner elements. this is my working code.

$scope.highlightFilteredHeader = function (row, rowRenderIndex, col, colRenderIndex) {

        if (col.displayName == 'Length') {
            return 'inline-filter';
        } else if (col.filters[0].term) {
            return 'header-filtered';
        } else {
            return ''
        }
    };

css

    .inline-filter .ui-grid-filter-input-0{
    width: 40% !important;
    float: left;
    margin-left: 10px !important;
}
.inline-filter .ui-grid-filter-input-1{
    width: 40% !important;
    float: left;
    margin-top: -8px !important;
    margin-left: 5px !important;
}
.inline-filter .ui-grid-filter-container .ui-grid-filter-button {
    top: 15px !important;
}
@media only screen and (max-width: 750px) {
    .inline-filter .ui-grid-filter-input-0{
        margin-left: 0 !important;
    }
}