Kendo controls download to pdf

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AngularJs

Kendo-UI

i have kendo grids and charts and it needs to be downloaded to PDF .Iam able to download to PDF sucessfully but i need to add some other data as well on PDF like dropdown down selected value and textbox selected value. how can i append ?

below code which i have attached with extract all charts to PDF

What I have tried:

$('#exportBtn').on('click', function () {
            var grid1 = $('#ServerLastLoginChart').data('kendoChart');
            var grid2 = $('#WSLastLoginChart').data('kendoChart');
            var grid3 = $('#WSOSChart').data('kendoChart');
            var grid4 = $('#ServerOSChart').data('kendoChart');

            var progress = $.Deferred();

            grid1._drawPDF(progress)
                .then(function (firstGrid) {
                    grid2._drawPDF(progress)
                        .then(function (secondGrid) {
                            secondGrid.children.forEach(function (x) {
                                firstGrid.children.push(x);
                            })
                            //return kendo.drawing.exportPDF(firstGrid, { multiPage: true });

                        })
                    grid3._drawPDF(progress)
                        .then(function (thirdGrid) {
                            thirdGrid.children.forEach(function (x) {
                                firstGrid.children.push(x);
                            })
                            //return kendo.drawing.exportPDF(firstGrid, { multiPage: true });
                        })
                    grid4._drawPDF(progress)
                        .then(function (fourthGrid) {
                            fourthGrid.children.forEach(function (x) {
                                firstGrid.children.push(x);
                            })
                            return kendo.drawing.exportPDF(firstGrid, { multiPage: true });
                        }).done(function (dataURI) {
                            kendo.saveAs({
                                dataURI: dataURI,
                                fileName: "SnowReporting.pdf"
                            });
                            progress.resolve();
                        })

                })

        })