Questions on Kendo UI for jQuery Forum

1 answer

104 views

Deselected option in multiselect not getting focus

In the kendo multiselect, when an item is deselected, it does not take the focus from the previously selected item. For example,
https://demos.telerik.com/kendo-ui/multiselect/keyboard-navigation

In the demo, select small, medium, and large in that order.
Open the list and click on small to deselect it.
Open the list and notice that large still has the focus.
The expected behavior is that small would take the focus from large.

Using only the keyboard:

Press the down arrow to open the list.
Using the down arrow and enter keys, select Small, medium, large, and xlarge in that order.
Using the down arrow and enter keys, deselect medium
Use the down arrow to open the dropdown.
Observe that xlarge is focused. The expected behavior would be that medium is focused.
Now select small and deselect large. Notice that small still has the focus.

MultiSelect

answered on 07 May 2024

1 answer

115 views

Multiple jQuery Window Loading Content with AJAX

Hi,

I was using jQuery Window Loading Content with AJAX and was able to open multiple Window, however after I updated Kendo UI, I can only open two Window now, is there any problem? Do I need to pay now to use it? I thought Window is a widget then there is no usage limitation on it.

Thank you for answering.

Ming

Window

answered on 06 May 2024

1 answer

84 views

Scheduler example with web service filtering

Hi,

Is there an example of a scheduler consuming a web service for meetings that doesn't expect all meetings to be returned.

I am migrating from a server side based application that used ASP.NET AJAX and that version of the scheduler required you to implement a provider that implemented a GetAppointments( RadScheduler owner ) where the owner object had the start and end dates of the visibile scheduler.

I would like to run a client side page with a Kendo UI for jQuery scheduler and then perform a web service call equivalent to the above GetAppointments. But all the examples I have found return all meetings which is not possible since we are reading from a database with many years of meetings.

The documentation

 read: {

    url: "http://demos.kendoui.com/service/tasks",

    dataType: "jsonp"

  },
https://docs.telerik.com/kendo-ui/controls/scheduler/binding
Thanks,
Charlotte

Data Source

Scheduler

updated answer on 03 May 2024

1 answer

97 views

Unable to debug Kendo UI code

I am using Kendo UI for jQuery R2 2023

I am unable to use the debugger of the Kendo UI code. The map file seems wrong - whenever I try to step into the Kendo code I find myself in the same location at the end of the file.

When I try to load kendo.all.js instead of kendo.all.min.js I get the errors in the console that kendo is not defined.

Please help.

General Discussions

answered on 02 May 2024

1 answer

78 views

Slider doesn't move when using keyboard on the buttons.

Hi. This issue can be replicated in the Telerik dojo for the jQuery Slider.

When tabbing to the decrease and increase buttons and pressing space to invoke the action, nothing happens. I can see the graphical affect of the button being pushed but there is no change in value of the slider.

Tabbing onto the central slider value and moving left and right using the arrow keys works as expected.

Here's what I reckon should happen when using the keyboard with the slider: When the user tabs to the increase/decrease button to give it focus, a press of the spacebar activates the button. The slider value should change accordingly and the focus should stay on the button.

Strangely, when NVDA is active, tabbing to the increase or decrease buttons and pressing spacebar key works the first time. It then shifts focus to the slider itself and I have to start using the left and right arrows instead.

Any thoughts on how to work around this as the built in events are not triggered?

Accessibility

Slider

answered on 02 May 2024

1 answer

55 views

mvvm stopped working with null in later versions

Hi Team,

Please see below dojo.

MVVM changes since 2023 have broken our app in a lot of places, but we're left with very little docs about which parts are impacted.

Values init with 'null' stopped working since upgrade to 2023 (csp changes again?). Same changes work if the values are init with 'undefined' instead. Please check if we're doing something incorrectly.

https://dojo.telerik.com/umOmiMiN/2

Thanks

MVVM

answered on 02 May 2024

1 answer

50 views

kendoTreeDragClueTemplate with the lost of iconClass on Angular Kendo 14.xx ++

Hi, with angular Kendo 14++ we lost the Icon Class. But now how I can cutomize treeview custom drag template?

I whant to add the k-i-cancel icon on some specific node. In the pass I was using:

<ng-template kendoTreeViewDragClueTemplate let-action="action" let-sourceItem="sourceItem"
    let-destinationItem="destinationItem" let-text="text">
    <span class="k-drag-status k-icon" [ngClass]="getDragStatus(action, sourceItem, destinationItem)"></span>
    <span>{{ text }}</span>
</ng-template>

Then in the getDragStatus I can do the logic and push the correct icon in ngClass.

For now I remove the template because I lost all the other icon like (add, insert, ... )

Its just for visual help, because I validate the drop in the "nodeDrop" fonction.

Thanks

TreeView

answered on 01 May 2024

1 answer

126 views

Issue with Missing Data Points in Kendo Chart Line Series

Description

Hello Telerik Community,

I'm encountering an issue with my Kendo Chart implementation where certain data points are not displaying on the line series, despite being present in the dataset. Here's a breakdown of the problem and my current setup:

Problem

- Some data points, specifically those corresponding to the dates November 26 and November 28/29, are not showing up on the line chart.
- However, these dates are appearing correctly in the category legend.

Setup

- I'm using Kendo Chart to visualize historical pool data.
- Data is fetched from a database and processed in the controller before being passed to the Razor view for rendering.
- Each manufacturer's data is plotted on the chart as separate line series, with the x-axis representing dates and the y-axis representing weight.

Relevant Code

- Controller Code: I've provided the relevant controller code responsible for fetching and processing the data.
- Razor View Code: Similarly, I've included the Razor view code where the Kendo Chart is defined and configured.

Expected Outcome

- I expect the line chart to display all data points, including those for November 27 and November 29, for each manufacturer.

Steps Taken

- I've checked the data in the controller, and it seems that all data points are correctly fetched from the database.
- I've inspected the generated HTML for the chart and confirmed that the missing data points are indeed not being rendered.

Request for Assistance

- Could you please review my setup and help me identify any potential issues causing the missing data points?
- Additionally, if you have any suggestions for troubleshooting or debugging this issue further, I would greatly appreciate it.

Additional Information

- Framework: ASP.NET MVC- Browser: Chrome, Edge

Thank you in advance for your assistance!

public ActionResult ChartTMS(DateTime? fromDate, DateTime? toDate, string unit = "gm")
        {
            fromDate = fromDate?.Date;
            toDate = toDate.HasValue ? toDate.Value.Date.AddDays(1).AddTicks(-1) : DateTime.Today;
 
            if (!fromDate.HasValue || !toDate.HasValue)
            {
                fromDate = DateTime.Today.AddDays(-6);
                toDate = DateTime.Today;
            }
 
            var allMeasurements = (
                from m in db.Target_Measurement_History.AsNoTracking()
                where m.Measurement_Record_Date >= fromDate.Value && m.Measurement_Record_Date <= toDate.Value
&& m.Target_Lot_Profile != null
&& m.Target_Lot_Profile.Target_Item != null
&& m.Target_Lot_Profile.Target_Item.Target_Manufacturer != null
                select new MeasurementDataViewModel
                {
                    Measurement_Record_Date = m.Measurement_Record_Date,
                    Pt_Remaining_Gms = m.Pt_Remaining_Gms,
                    Ru_Remaining_Gms = m.Ru_Remaining_Gms,
                    Manufacturer = m.Target_Lot_Profile.Target_Item.Target_Manufacturer,
                }).ToList();
 
            var manufacturers = allMeasurements.Select(m => m.Manufacturer).Distinct();
            var colorMap = new Dictionary<string, string>();
            Random rand = new Random();
 
            foreach (var manufacturer in manufacturers)
            {
                colorMap[manufacturer] = $"#{rand.Next(0x1000000):X6}";
            }
 
            var groupedData = allMeasurements
                .GroupBy(m => new { m.Measurement_Record_Date.Date, m.Manufacturer })
                .Select(group => new MeasurementDataViewModel
                {
                    Measurement_Record_Date = group.Key.Date,
                    Pt_Remaining_Gms = group.Sum(item => item.Pt_Remaining_Gms),
                    Ru_Remaining_Gms = group.Sum(item => item.Ru_Remaining_Gms),
                    Manufacturer = group.Key.Manufacturer,
                    Color = colorMap[group.Key.Manufacturer]
                })
                .OrderBy(g => g.Measurement_Record_Date)
                .ThenBy(g => g.Manufacturer)
                .ToList();
 
            const float gramsPerTroyOunce = 31.1035f;
 
            if (unit == "t oz")
            {
                foreach (var item in groupedData)
                {
                    if (item.Pt_Remaining_Gms.HasValue)
                        item.Pt_Remaining_Gms = item.Pt_Remaining_Gms.Value / gramsPerTroyOunce;
 
                    if (item.Ru_Remaining_Gms.HasValue)
                        item.Ru_Remaining_Gms = item.Ru_Remaining_Gms.Value / gramsPerTroyOunce;
                }
            }
 
            ViewBag.fromDate = fromDate;
            ViewBag.toDate = toDate;
            ViewBag.Unit = unit;
 
            return View(groupedData);
        }

    public class MeasurementDataViewModel
    {
        public DateTime Measurement_Record_Date { get; set; }
        public float? Pt_Remaining_Gms { get; set; }
        public float? Ru_Remaining_Gms { get; set; }
        public string Manufacturer { get; set; }
        public string Color { get; set; }
    }

[
    {
        "Measurement_Record_Date": "/Date(1542823200000)/",
        "Pt_Remaining_Gms": 4370,
        "Ru_Remaining_Gms": 5621,
        "Manufacturer": "JX Nippon"
    },
    {
        "Measurement_Record_Date": "/Date(1542823200000)/",
        "Pt_Remaining_Gms": 4571,
        "Ru_Remaining_Gms": 4295,
        "Manufacturer": "Kojundo/Mitsui"
    },
    {
        "Measurement_Record_Date": "/Date(1543168800000)/",
        "Pt_Remaining_Gms": 1785,
        "Ru_Remaining_Gms": 7086,
        "Manufacturer": "JX Nippon"
    },
    {
        "Measurement_Record_Date": "/Date(1543255200000)/",
        "Pt_Remaining_Gms": 36432,
        "Ru_Remaining_Gms": 41800,
        "Manufacturer": "Kurt J. Lesker"
    },
    {
        "Measurement_Record_Date": "/Date(1543428000000)/",
        "Pt_Remaining_Gms": 76360,
        "Ru_Remaining_Gms": 74687,
        "Manufacturer": "Kurt J. Lesker"
    },
    {
        "Measurement_Record_Date": "/Date(1543428000000)/",
        "Pt_Remaining_Gms": 11138,
        "Ru_Remaining_Gms": 9686,
        "Manufacturer": "Materion"
    },
    {
        "Measurement_Record_Date": "/Date(1543428000000)/",
        "Pt_Remaining_Gms": 1329,
        "Ru_Remaining_Gms": 4796,
        "Manufacturer": "Mitsubishi"
    }
]

@using Kendo.Mvc.UI
@using System.Web.Mvc
@using System.Web.Mvc.Html
@using Kendo.Mvc.Extensions
@model IEnumerable<TMS_RND.Controllers.MeasurementDataViewModel>
@using System.Web.Helpers
 
@{
    ViewBag.Title = "Chart";
    Layout = "~/Views/Shared/_Layout.cshtml";
 
    DateTime startDate = ViewBag.fromDate ?? DateTime.Today.AddDays(-6);
    DateTime endDate = ViewBag.toDate ?? DateTime.Today;
    string currentUnit = ViewBag.Unit ?? "gm";
    var manufacturers = Model
        .GroupBy(m => m.Manufacturer)
        .Select(g => new
        {
            Manufacturer = g.Key,
            Color = g.First().Color
        })
        .ToList();
}
 
 
<div class="demo-section wide">
<div style="display: flex; justify-content: space-between; align-items: center;">
<div>
            From: @(Html.Kendo().DatePicker().Name("fromDate").Value(startDate.ToString("yyyy-MM-dd")))
            To: @(Html.Kendo().DatePicker().Name("toDate").Value(endDate.ToString("yyyy-MM-dd")))
<button id="refreshChart">Refresh Chart</button>
<button id="clearFilter">Clear</button>
<button id="toggleUnit">@(currentUnit == "gm" ? "Switch to Troy oz" : "Switch to gm")</button>
</div>
<div>
<button class="tab" id="totalPoolTab">Total Pool</button>
<button class="tab" id="tmsTab" style="background-color: lightblue;">TMS</button>
</div>
<div>
            @foreach (var manufacturer in manufacturers)
            {
<span style="color:@manufacturer.Color">@manufacturer.Manufacturer</span>
            }
</div>
</div>
<div id="chartContainer">
        @(Html.Kendo().Chart(Model)
            .Name("chart")
            .Title("Historical Pool Data")
            .HtmlAttributes(new { style = "height: 400px;" })
            .Legend(legend => legend.Position(ChartLegendPosition.Bottom))
            .SeriesDefaults(seriesDefaults => seriesDefaults.Line().Stack(false))
            .Series(series => {
                foreach (var manufacturer in manufacturers)
                {
                    var manufacturerData = Model.Where(m => m.Manufacturer == manufacturer.Manufacturer).ToList();
                    series.Line(manufacturerData.Select(m => m.Pt_Remaining_Gms))
                          .Name("Pt - " + manufacturer.Manufacturer)
                          .Color(manufacturer.Color)
                          .Visible(true)
                          .Labels(labels => labels.Visible(true).Format("{0:N2} " + currentUnit));
                    series.Line(manufacturerData.Select(m => m.Ru_Remaining_Gms))
                          .Name("Ru - " + manufacturer.Manufacturer)
                          .Color(manufacturer.Color)
                          .Visible(false)
                          .Labels(labels => labels.Visible(true).Format("{0:N2} " + currentUnit));
                }
            })
            .CategoryAxis(axis => axis.Categories(Model.Select(m => m.Measurement_Record_Date.ToString("dd MMM yyyy")).Distinct()))
            .ValueAxis(axis => axis.Numeric()
                .Line(line => line.Visible(false))
                .Title("Weight (" + currentUnit + ")"))
            .Tooltip(tooltip => tooltip.Visible(true).Format("{0:N2} " + currentUnit))
        )
</div>
</div>
 
<script>
    $(document).ready(function () {
        function toISOStringWithMidday(date) {
            var localDate = new Date(date);
            localDate.setHours(12, 0, 0, 0);
            var offset = localDate.getTimezoneOffset() * 60000;
            var localMidday = new Date(localDate.getTime() - offset);
            return localMidday.toISOString();
        }
 
        $("#refreshChart").click(function () {
            refreshChart();
        });
 
        $("#toggleUnit").click(function () {
            var newUnit = '@currentUnit' == 'gm' ? 't oz' : 'gm';
            refreshChart(newUnit);
        });
 
        $("#clearFilter").click(function () {
            window.location.href = '@Url.Action("ChartTMS", "Target_Measurement_History")';
        });
 
        function refreshChart(newUnit) {
            var selectedFromDate = $("#fromDate").data("kendoDatePicker").value();
            var selectedToDate = $("#toDate").data("kendoDatePicker").value();
            var unitParam = newUnit || '@currentUnit';
 
            if (selectedFromDate && selectedToDate) {
                var difference = Math.abs(selectedToDate.getTime() - selectedFromDate.getTime());
                if (difference > 7 * 24 * 60 * 60 * 1000) {
                    alert("Please select a date range within 7 days.");
                    return;
                }
 
                var fromDateStr = toISOStringWithMidday(selectedFromDate);
                var toDateStr = toISOStringWithMidday(selectedToDate);
 
                window.location.href = '@Url.Action("ChartTMS", "Target_Measurement_History")' + '?fromDate=' + fromDateStr + '&toDate=' + toDateStr + '&unit=' + unitParam;
            } else {
                alert("Please select both from and to dates.");
            }
        }
 
        $("#totalPoolTab").click(function() {
            window.location.href = '@Url.Action("Chart", "Target_Measurement_History")';
        });
 
        $("#tmsTab").click(function() {
            window.location.href = '@Url.Action("ChartTMS", "Target_Measurement_History")';
        });
 
        $("#tmsTab").css("background-color", "lightblue");
 
        $(".tab").click(function() {
            $(".tab").css("background-color", "");
            $(this).css("background-color", "lightblue");
        });
    });
</script>

Charts

answered on 01 May 2024

1 answer

155 views

Move selected items to top of kendo multiselect

I have a kendo multi-select with a list of items sorted by name (Alaska, California, Delaware, Florida, Georgia...). When a user selects items, I want them to be displayed at the top of the list the next time the list is opened (not to move during the select process). For example, if the user selects Delaware and Florida the new order should be: Delaware (selected), Florida (selected), Alaska, California, Georgia. How would I accomplish this? Note, if it makes a difference, some of my lists are virtualized and some are not. It depends on how many reasonable options I could have. All are using a local JSON data source.

MultiSelect

answered on 29 Apr 2024

2 answers

189 views

Dropdown With Tooltip for Mouse and Touch Devices

I have been asked to add tooltips to a dropdownlist so a user can see more details about an item before selecting it. I found this solution https://docs.telerik.com/kendo-ui/knowledge-base/show-tooltip-for-items but it doesn't work right on touch devices. When you touch the screen, it selects the item, closes the list, and displays the tooltip until you click somewhere else on the screen. I kind of think maybe there should be a separate button for showing the tooltip vs selecting the item. How would I achieve this?

DropDownList

ToolTip

updated answer on 25 Apr 2024