Why does the TelerikCalendar not support the DateOnly struct?  Can this functionality be added?

Many of our Date operations rely on the DateOnly struct.

Bug report

Reproduction of the problem

(bug report only)
Regression introduced in 13.0.0.
1. Run this example: https://blazorrepl.telerik.com/wUuSGClv00orFeRm59

Current behavior

(optional)
The Size, Rounded, FillMode parameters are ignored.

Expected/desired behavior

The parameter values should apply and change the appearance of the SearchBox.

Environment

• Browser: [all ]

At the moment, typing with the keyboard focuses the first item that starts with the last letter you pressed. To focus the next one you should either use Down Arrow, or type the same letter again.

I would like it to behave like the regular <select> or like a combo box with filtering - typing characters quickly should highlight the item that begins with all those characters, instead of using only the first letter.

=== 

Admit edit: some keywords for better findability: DropDownList keyboard search filter accessibility

The ComboBox and MultiColumnComboBox retain their TextField string label when the value is cleared programmatically. The issue starts to occur in version 14.1.0.

Test Page:

<ul>
    <li><code>AutoCompleteValue</code>: @AutoCompleteValue</li>
    <li><code>SelectedValue</code>: @SelectedValue</li>
    <li><code>SelectedValueNullable</code>: @SelectedValueNullable</li>
    <li><code>MultiSelectValues</code>: @string.Join(", ", MultiSelectValues)</li>
</ul>

<p>
    <TelerikButton OnClick="@(() => {
        AutoCompleteValue = string.Empty;
        SelectedValue = default;
        SelectedValueNullable = default;
        MultiSelectValues = new();
    })">Clear Values</TelerikButton>
</p>

<TelerikAutoComplete Data="@ListItems"
                     @bind-Value="@AutoCompleteValue"
                     ValueField="@nameof(ListItem.Text)"
                     Placeholder="Select Item"
                     ShowClearButton="true"
                     Width="300px" />

<br /><br />

<TelerikComboBox Data="@ListItems"
                 @bind-Value="@SelectedValue"
                 TextField="@nameof(ListItem.Text)"
                 ValueField="@nameof(ListItem.Id)"
                 Placeholder="Select Item"
                 ShowClearButton="true"
                 Width="300px" />

<TelerikComboBox Data="@ListItems"
                 @bind-Value="@SelectedValueNullable"
                 TextField="@nameof(ListItem.Text)"
                 ValueField="@nameof(ListItem.Id)"
                 Placeholder="Select Item"
                 ShowClearButton="true"
                 Width="300px" />


<br /><br />

<TelerikDropDownList Data="@ListItems"
                     @bind-Value="@SelectedValue"
                     TextField="@nameof(ListItem.Text)"
                     ValueField="@nameof(ListItem.Id)"
                     DefaultText="Select Item"
                     Width="300px" />

<TelerikDropDownList Data="@ListItems"
                     @bind-Value="@SelectedValueNullable"
                     TextField="@nameof(ListItem.Text)"
                     ValueField="@nameof(ListItem.Id)"
                     DefaultText="Select Item"
                     Width="300px" />

<br /><br />

<TelerikMultiColumnComboBox Data="@ListItems"
                            @bind-Value="@SelectedValue"
                            TextField="@nameof(ListItem.Text)"
                            ValueField="@nameof(ListItem.Id)"
                            Placeholder="Select Item"
                            ShowClearButton="true"
                            Width="300px">
    <MultiColumnComboBoxColumns>
        <MultiColumnComboBoxColumn Field="@nameof(ListItem.Id)" />
        <MultiColumnComboBoxColumn Field="@nameof(ListItem.Text)" />
    </MultiColumnComboBoxColumns>
</TelerikMultiColumnComboBox>

<TelerikMultiColumnComboBox Data="@ListItems"
                            @bind-Value="@SelectedValueNullable"
                            TextField="@nameof(ListItem.Text)"
                            ValueField="@nameof(ListItem.Id)"
                            Placeholder="Select Item"
                            ShowClearButton="true"
                            Width="300px">
    <MultiColumnComboBoxColumns>
        <MultiColumnComboBoxColumn Field="@nameof(ListItem.Id)" />
        <MultiColumnComboBoxColumn Field="@nameof(ListItem.Text)" />
    </MultiColumnComboBoxColumns>
</TelerikMultiColumnComboBox>

<br /><br />

<TelerikMultiSelect Data="@ListItems"
                    @bind-Value="@MultiSelectValues"
                    TextField="@nameof(ListItem.Text)"
                    ValueField="@nameof(ListItem.Id)"
                    Placeholder="Select Items"
                    ShowArrowButton="true"
                    ShowClearButton="true"
                    AutoClose="false"
                    Width="600px" />

@code {
    private List<ListItem> ListItems { get; set; } = new();

    private int SelectedValue { get; set; } = 3;
    private int? SelectedValueNullable { get; set; } = 3;
    private string AutoCompleteValue { get; set; } = "Item 3";

    private List<int> MultiSelectValues { get; set; } = new() { 3, 5 };

    protected override void OnInitialized()
    {
        ListItems = new List<ListItem>();

        for (int i = 1; i <= 24; i++)
        {
            ListItems.Add(new ListItem()
            {
                Id = i,
                Text = $"Item {i}"
            });
        }

        base.OnInitialized();
    }

    public class ListItem
    {
        public int Id { get; set; }
        public string Text { get; set; } = string.Empty;
    }
}

I have a cascading DropDownList scenario with virtual scrolling. When the first DropDownList changes value, the second one should reset its scrollbar to the top, because it now contains new data. This doesn't happen.

Here is a REPL test page.

===

ADMIN EDIT

===

As a workaround for the time being, you may track when the value is changed in the parent DropDownList to dispose and re-initialize the child DropDownList.

Here is an example: https://blazorrepl.telerik.com/mdafHabk585ZtzyV54.

The documented lazy loading scenario is not compatible with Telerik UI for Blazor 15.0.0, because of the new ITelerikIconService. Unlike the ITelerikStringLocalizer, there is no alternative way to register this icon service outside Program.cs.

• The PDF Viewer does not display the initial file if Zoom is set to FitToWidth or FitToPage. This is due to --scale-factor: NaN; --total-scale-factor: NaN; set on the PDF Viewer element.
• If the PDF Viewer initially shows with no loaded file, setting Zoom to FitToWidth or FitToPage initially or after opening a file leads to infinity zoom due to --scale-factor: Infinity; --total-scale-factor: Infinity; set on the PDF Viewer element.

The only scenario that works is to set the initial Zoom to a numeric value and have an open file by default.

I am trying to look at the times 7pm - midnight.  But if I set the end time to midnight, I get an error that the end time has to be greater than the start time.  How do I set the timeline to show 7pm - midnight or 8pm - 2am?

I tried including the next date in the EndTime but the Scheduler does not take the date into consideration, it checks only the time portion.

I am resetting the Grid State by calling Grid.SetState(null). This doesn't reset ColumnState<T>.Locked boolean to false and the columns remain locked.

---

ADMIN EDIT

---

A possible workaround for the time being is to additionally loop through the ColumnStates collection of the State and set the Locked property to false for each column.

Example: https://blazorrepl.telerik.com/QTYmkpvb49c6CPxa42

When Adaptive = true, changing the collection of buttons seems to "break" the adaptive calculation. The Toolbar fails to determine what are the buttons to show in the main element and what are the buttons to show in the pop-up: https://blazorrepl.telerik.com/wSubOWlS08FLz7aZ54

===

ADMIN EDIT

For the time being, a possible workaround is to force the component to refresh when you change the buttons. For that purpose, you can dispose it and re-initialize it after some delay. Here is a runnable sample: https://blazorrepl.telerik.com/QIOFuCvS400o5tfL34.

We have a Blazor project that normally takes 20 seconds to build.

But after upgrading Telerik.Licensing from 1.8.2 to 1.9.0/1 the build takes about 60 seconds.

First we upgraded all telerik references with this effect. Now we downgraded all to the version that is supported by 1.8.2.

In the project, the only change I make is to change the version from 1.8.2 to 1.9.0 or later, then the build goes from 20 seconds to 60 seconds, no other changes made...

I have tried Rebuild, Restarts etc...

In the build detailed output, it is the csc command that takes longer times.

Bug report

Reproduction of the problem

(bug report only)
Run this example: https://blazorrepl.telerik.com/GqaiPtbH54zmCKSH29
There are two editable columns (Price).
1. Click on the first Price column cell in the first row.
2. Press Tab key. The last editable cell on the first row is focused and is brought into view.
3. Press Tab again. The first editable cell on the second row is focused and brought into view.
4. Press Tab again. The last editable cell on the second row is focused, but it is not brought into view.

Current behavior

(optional)

Navigation across editable cells works inconsistently. On every other row, the last editable cell is not brought into view.

Expected/desired behavior

Navigation should work consistently on every row.

Environment

• Kendo/Telerik version: 15.0.0
• jQuery version: x.y
• Browser: [all]

I've determined that the TelerikDateTimePicker does not work properly on mobile devices when using AdaptiveMode.Auto. Attached are videos of the component's behaviour in both modes (None, and Auto).

Immediately after interacting with the fullscreen popup of the datepicker, I see this error in the console:

RAW:
telerik-blazor.js:50 Uncaught TypeError: r.isParent is not a function
    at p.isChild (telerik-blazor.js:50:1362352)
    at f.closePopup (telerik-blazor.js:50:1398427)
    at HTMLHtmlElement.onMouseDown (telerik-blazor.js:50:1397246)

Code:

@using Telerik.Blazor.Components
@using Telerik.Blazor

<TelerikFloatingLabel Text="Date & Time">
    <TelerikDateTimePicker Id="date-picker" @bind-Value="MyFormModel.Date" Max="@DateTime.Now.AddDays(1)"
                           Format="@DATE_FORMAT" AdaptiveMode="AdaptiveMode.Auto"
                           FillMode="@Telerik.Blazor.ThemeConstants.DateTimePicker.FillMode.Flat" />
</TelerikFloatingLabel>

@code {
    private FormModel MyFormModel { get; set; } = new FormModel();
    private const string DATE_FORMAT = "MM/dd/yyyy HH:mm";

    private class FormModel
    {
        public DateTime Date { get; set; }
    }
}

Notes:
- If we remove all of the parent components wrapping the DatePicker, it seems to function properly, but the errors remain in the console. This isn't a solution, however.

We have a grid with a GridCheckboxColumn that we have configured through a '.unselectable-row' style so that certain elements cannot be selected (those elements with a padlock in the second column cannot be selected).

The grid works correctly in isolation, but when we add a TelerikLoaderContainer that is displayed during data loading process, the grid doesn't working properly: it is possible to select all the enabled elements of the grid using the button in the header of the checkbox column. However it is not possible to deselect them from the button in the header of the checkbox column when there is any unselectable element.

Here it is a link to REPL with a reproducible example: https://blazorrepl.telerik.com/GyYhYXPI24gIYgIJ03

To reproduce the problem, you sholud select all grid elements from the checkbox column header button and try to deselect them. You will not be able to deselect all the elements. 
Now comment the LoaderContainer component and repeat the test. You will see that now it is possible to deselect correctly all the elements.

How can we deselect all the elements from the header while keeping the loadercontainer?

I am using ComboBox and I want to be able to filter by two model properties. To achieve this I have implemented custom filtering through the OnRead event. Additionally, I am ordering the data to first match the results from the one property, which also is used for the TextField, and after that to match the results from the other property. However, when the results are only from the match of the second property, there is no focus.

Here is a REPL example https://blazorrepl.telerik.com/wyaMQhEN108axXJ036 

Steps to reproduce the issue:

Type "a": "Value test - ano" has the focus (the first option in the list)

Type "an": "Value test - ano" receives the focus (the first option in the list)

Type "ano": "Value test - ano" receives the focus (the first option in the list)

Type "anot": no item has focus despite the results being only "Another Value - val"

When SchedulerGroupOrientation is set to vertical, increasing the height of the `SchedulerResourceGroupHeader` breaks the rendering of the Scheduler cells, which causes misalignment of the appointments. In my scenario, I want to have a Button and an Icon in the group header cell.

Reproduction example: https://blazorrepl.telerik.com/wJElGYvF02XSsN6j42