Questions on Kendo UI for jQuery Forum

1 answer

23 views

Add class to marker in Jquery ScatterPlot Chart

I have a kendo UI Jquery scatterplot chart with markers of type: square and rotation: 45. I'm trying to add a class based on the series to the markers so that certain ones can be styled to have a pointer when the user mouses over them. I found a few Google AI answers but they seem to be wrong. Here is what I tried where chartData is set to my series option on initialization.

Update: I added the class manually in dev tools and it still doesn't trigger the pointer to appear. This seems to be due to there being a separate marker that Kendo is creating in the DOM for the hover event which does not get the class. I need to add a cursor: pointer; style to that element

        chartData.push({
            name: legendSeriesName,
            xField: "x",
            yField: "y",
            data: storeDetailScatterPlotData
                .filter(d => d.seriesName === seriesName && d.accountId === storeDetailAccountId)
                .map(d => ({ x: d.sales, y: d.storeAmt, storeName: d.storeName, storeId: d.storeId, accountId: d.accountId })),
            zIndex: 10 - index,
            color: seriesColor,
            markers: {
                border: seriesColor,
                background: seriesColor,
                type: "square",
                rotation: 45,
                visual: function (e) {
                    var series = e.series.name;
                    var defaultVisual = e.createVisual();
                    defaultVisual.options.attr("class", series);
                    return defaultVisual;
                }
            }
        });

Charts

answered on 18 Jun 2025

0 answers

33 views

My chart series design and legend does not tally

Hi.

my chart bar design and legend items design does not match up

my kendo configuration

$("#my-score-chart").kendoChart({
    transitions: false,
    tooltip: { visible: false },
     legend: {
     orientation: 'horizontal',
     position: "bottom"
 },
    plotArea: {
        margin: { top: 20, bottom: 20, left: 20, right: 20 }
    },
    seriesDefaults: {
        type: "bar",
        spacing: 0,
        gap:10,
        highlight: { visible: false },
        labels: {
            visible: true,
            position: "outsideEnd",
            template: "#= value #"
        }
    },
    series: [
        { name: "2025", data: [75, 75], color: "#254599" },
        { name: "2024", data: [50, 50], color: "#92A7E0" },
        { name: "2023", data: [25, 35], color: "#FFFFFF", border: { width: 1, color: "#616D80", dashType: "solid" } }
    ],
    valueAxis: {
        visible: false
    },
    categoryAxis: {
        categories: ["Strategy & Leadership", "Governance"],
        majorGridLines: { visible: false },
        labels: { color: "#000" }
    }

});

Charts

updated question on 17 Jun 2025

1 answer

49 views

Updating parent data grid from child grid

Hello

I have a grid and each row can be expanded, using detailInit, to show an inner grid.

I fetch the data beforehand so that I can populate the grid using local data.

In inner grid I have a column with a delete button - using template I call a delete function passing this as a parameter.

// column definition
 {
                    field: "delete",
                    title: "Delete",
                    width: 50,
                    template: "<span class='delete' onclick='delete(this)'><img src='.delete_icon.png'/></span>"
},

my delete function :

function delete(e) {
            let Loader = KENDO.KendoLoader($("body"));
            try {
                Loader.Show();
                let row = $(e).closest("tr");
                let grid = $(e).closest(".innerGrid");

                let dataItem = KENDO.KendoGrid(grid).GetDataItem(row);
                let innerRowId= dataItem.id;

                let parentRow = row.parent().closest(".k-detail-row").prev();
                let parentDataItem = KENDO.KendoGrid($("#ParentGrid")).GetDataItem(parentRow);

                KENDO.KendoGrid(grid).DeleteUI([innerRowId]); // DeleteUI gets array of ids to delete , implemented below
               
                // if no rows remain in inner grid, I need to update a column's value in the parent row
                if (KENDO.KendoGrid(grid).HasRows() == false) {
                    grid.hide();
                    grid.siblings(".noRecordsFound").show();

                     let updatedDataObj = {
                            id: parentDataItem.id,
                            someColumnOnParentRow: null
                        }

                        KENDO.KendoGrid($("#ParentGrid")).UpdateUI([updatedDataObj]); // UpdateUI gets array of objects to update, implemented below
                }
            }
            catch (error) {
                debugger;
                console.log(error.message);
            }
            finally {
                Loader.Hide();
            }
        }

We have created a own KENDO wrapper script for different widgets. Here is the kendoGrid code:

let KENDO = {
  KendoComponent(jQueryElement, component, options = null) {

        let kendoComponent = {};

        kendoComponent.InitKendoComponent = function () {
            let kComponent = jQueryElement.data(component);
            if (!kComponent) {
                if (options) {
                    kComponent = jQueryElement[component](options).data(component);
                }
                else {
                    kComponent = jQueryElement[component]().data(component);
                }
            }
            return kComponent;
        };

        return kendoComponent;
    },

   KendoGrid(jQueryElement, options = null) {

        let kendoGrid = {};

        let kGrid = KENDO.KendoComponent(jQueryElement, "kendoGrid", options).InitKendoComponent();
        if (options)
            kGrid.setOptions(options);

        kendoGrid.SetOptions = function (options) {
            kGrid.setOptions(options);
            return kendoGrid;
        }

        kendoGrid.GetData = function () {
            return Array.from(kGrid.dataSource.data());
        }

        kendoGrid.GetDataItem = function (jQueryTableRow) {
            return kGrid.dataItem(jQueryTableRow);
        }

        kendoGrid.UpdateUI = function (dataToUpdate = []) {
            dataToUpdate.forEach(obj => {
                let dataItem = kGrid.dataSource.get(obj.id);
                if (dataItem) {
                    for (let prop in obj) {
                        if (prop !== "id") {
                            dataItem.set(prop, obj[prop]);
                        }
                    }
                } 
            });
            return kendoGrid;
        }

        kendoGrid.DeleteUI = function (idsToDelete = []) {
            idsToDelete.forEach(id => {
                let dataItem = kGrid.dataSource.get(id);
                if (dataItem)
                    kGrid.dataSource.remove(dataItem);
            });
            return kendoGrid;
        };

        kendoGrid.HasRows = function () {
            return kGrid.dataSource.data().length > 0;
        }

        return kendoGrid;
    }
  
}

It appears that UpdateUI does not function as it should.

When I test I notice that when the last remaining row of inner grid is deleted, the parent row's column is indeed updated to null, the No Records Found message is shown instead of the inner grid, the parent row gets collapsed, and when I expand it the inner grid is shown with the last remaining row.

Suprisingly, if I comment out the UpdateUI line, the inner grid's row gets deleted, without collapsing the inner grid and the No Records Found message is shown as intended (the parent row's column does not get updated in this case, obviously).

Is it a bug in Kendo ? or am I doing something wrong?

Data Source

Grid

answered on 13 Jun 2025

0 answers

21 views

Standardize chart type bar and column

i realised the width of the width get change when the number of category changes.

example the bar width get bigger when category get lesser.

for column, the chart get center align.

what i wanted

for column type chart, to be left align when there is only 1 category

for bar type chart, to be top align when there is only 1 category

for all chart type, the width of the series item to be same irregardless of the number of category

Charts

asked on 13 Jun 2025

1 answer

31 views

Grid filtering custom operator - unexpected behaviour

For certain types of data in my grid, I need to define custom filter operators, e.g.:

updateOrAddFilter(fieldKey, {
    field: fieldKey, operator: function (item) {
        const nItem = normalize(item);
        const nValue = normalize(value);

        return nItem && nItem.includes(nValue);
    }
});

The updateOrAddFilter function then browses through the all the filters currently applied to the grid's dataSource, replaces old current-column filters with the new one and keeps all the other-column ones, and updates the grid's dataSource as such:

grid.dataSource.filter({ logic: "and", filters: updatedFilters });

The problem is that - it doesn't work! The updateOrAddFilter function works exactly as expected until I try to combine the custom operator filter with others.

Why is this happening? How can I fix it? Thanks in advance.

Filter

Grid

answered on 11 Jun 2025

1 answer

28 views

Multiselect Tree issues

When I select initialize a kendoDropDownTree with checkboxes set to true, I experience all kinds of odd behavior visually. Inspecting the code shows that it is now a MultiSelectTree and not a DropDownTree yet there is no documentation and little support for this somewhat hidden component. I would actually prefer to have a MultiSelectTree without the checkboxes similar to a multiselect but with the grouping.

One issue, is that it does not respect the global settings for the corner radius of the box.

kendo.ui["DropDownTree"].fn.options["rounded"] = "none";

kendo.ui["MultiSelect"].fn.options["rounded"] = "none";

These seem to do nothing. When I guessed at "MultiSelectTree", I got a console error.

Another issue is that the UI looks very different from the regular multiselect and it doesn't seem to apply the .k-selected class as expected. When I check a box, the aria-checked is true but the k-selected class is not applied, this makes the item remain white rather than getting the blue background like it does in a regular multi-select. Can we get some consistency there?

Expanding an element does not change the height of the k-child-animation-container. It does show on the screen, but any styling targeting the container will not work because the container does not expand to fit the content.

I made my dropdown arrows 7px wider (k-treeview-toggle). Now the autoWidth makes the list 7px wider than the input element.

answered on 10 Jun 2025

0 answers

16 views

Does the jQuery Splitter support the drag event?

I am trying to support a drag event with the jQuery Splitter that is the same as the Angular Splitter version of sizeChange that is demonstrated here:

https://www.telerik.com/kendo-angular-ui/components/layout/splitter/events

I have tried attaching events to kendoDraggable, binding to layoutChange, etc., but nothing works to capture the real-time drag event as the splitbar is moved. Is there any known way to trap this event?

Thanks, Bob

Splitter