Hey all, I just tried the big upgrade (VS 2020, .Net 6). During it, I moved from Telerik UI for Blazor 2.30. I've invested a lot of time into using this component and it came out as a non-starter in this release. After digging for a couple hours, I just kept it simple (see code). 

Any time you put an @ inside a TileLayoutItem, it breaks - just freezes everything. So I can't tell you where it is coming from, but I can tell you it doesn't work. To reproduce, see the following code, but basically use "@someObject" as the value of an attribute of TileLayoutItem or inside Content/HeaderTemplate.

My use case is more complicated and I'm waiting for a mid-December pre-release (see ticket 1543513), but here's a way to reproduce (I hope)

Example: 

<TelerikTileLayout Reorderable="true"
                   Resizable="true"
                   >
    <TileLayoutItems>
        @foreach (string name in Names)
        {            
            <TileLayoutItem Class="builder">
                <Content>@name</Content>
            </TileLayoutItem>
        }
    </TileLayoutItems>
</TelerikTileLayout>

@code {
	public List<string> Names { get; set; } = new List<string> { "Sara", "Dan", "Frank", "Deuce" };
}

Here is the scenario I would like to implement:

User has a default dashboard, with Customise functionality which would:

• Allow the user to move and resize items (same as now)
• Add / remove item, adding using a drag and drop function from a set of tile types, for example exposed in a TelerikList component. Removing an item with a "delete" button or similar.
• Customise tiles, for example a time period on a chart.
• Save the state of the dashboard.

For loading and saving the dashboard with each tile having a specific content the easiest way I can see would be to bind the TelerikTileLayout to a data source:

<TelerikTileLayout Data="@TileData">

<TileConfiguration></TileConfiguration>

</TelerikTileLayout>

The data would be updated as and when the user configures their dashboard. 

For dragging and dropping new tiles a set of events would be necessary, both on the source tile list, e.g. OnDragBegin and on the tile layout OnDrop.

I want to dynamically change the TileLayout Reorderable parameter but the component does not react to that change. Dynamic change in the Resizable parameter is also not applied.

I am also trying to change the TileLayoutItem ColSpan dynamically - for example, when implementing it in a responsive layout (https://docs.telerik.com/blazor-ui/knowledge-base/tilelayout-responsive) but using a variable as the ColSpan value does nothing. The TileLayout does not react to a change in the ColSpan parameter either.

It would be nice if the TelerikTileLayout could be told to refresh itself or to refresh after some of its parameters is changed.

When in a div with display:flex, I cannot resize the tiles to the right as I expect to - they stop resizing before I reach the end of the tile layout.

---

ADMIN EDIT

Here is a sample you can use to observe the issue - try resizing the tiles and change the size of the layout offset. For cleanest results do this in a blank app that has absolutely no other styles (so no other layout is in play).

A short gif is attached at the end of this post that shows the problem.

<TelerikNumericTextBox @bind-Value="@width" Step="20" Min="0" Max="800"></TelerikNumericTextBox>
@code{
    int width { get; set; } = 200;
}
<div style="display:flex; flex-direction: row;">
    <div style="width: @(width)px; background: yellow;">
        some content on the left. When this is here, resizing tiles cannot use the full width of the tile layout
        - it stops short with the offset by this element due to the flex layout.
        Change the width of this element to see the effect - as you increase you will stop being
        able to resize 1column tiles at all. If you decrease, eventually you will be.
    </div>
    <div style="position: relative; display: block;"> @* THE WORKAROUND - REMOVE TO SEE THE PROBLEM *@
        <TelerikTileLayout ColumnWidth="200px"
                           RowHeight="150px"
                           Width="700px"
                           Columns="3"
                           Resizable="true">
            <TileLayoutItems>
                <TileLayoutItem HeaderText="Panel 1">
                    <Content>Regular sized first panel.</Content>
                </TileLayoutItem>
                <TileLayoutItem HeaderText="Panel 2">
                    <Content>You can put components in the tiles too.</Content>
                </TileLayoutItem>
                <TileLayoutItem HeaderText="Panel 3" RowSpan="3">
                    <Content>This tile is three rows tall.</Content>
                </TileLayoutItem>
                <TileLayoutItem HeaderText="Panel 4" RowSpan="2" ColSpan="2">
                    <Content>This tile is two rows tall and two columns wide</Content>
                </TileLayoutItem>
            </TileLayoutItems>
        </TelerikTileLayout>
    </div>
</div>

---

When using my own buttons in the header template, and I have Reorderable=true, the tile layout consumes mouse events and clicks on my buttons don't always work. I would like to have the tile layout provide command buttons that can work in this scenario that let me handle their clicks reliably.

The functionality I am after is closing an minimizing tiles, so built-in actions for that like with the window would be nice. Perhaps tile items could get a Visible parameter like the grid columns and that could also go in their state.