New to Telerik UI for ASP.NET MVC? Download free 30-day trial

DropDownTree Appearance

As of the R1 2022 release, the DropDownTree component uses a new rendering. To learn more about why we decided to create a new rendering for our components, see the Components Rendering Overview article.

For a live example of the styling options of the DropDownTree, visit the Appearance Demo of the DropDownTree.

Options

The DropDownTree supports the following styling options:

  • Size—configures the overall size of the component.
  • Rounded—configures the border radius of the component.
  • FillMode—configures how the color is applied to the component.

Size

The Size option controls the size of the DropDownTree. The k-input-{size} class, which is applied to the wrapping span element of the DropDownTree, reflects the value of the Size option. The k-input-{size} class is used when the DropDownTree is configured for Multiple Selection. When Single Selection is used in the DropDownTree, the class we apply is k-picker-{size}. The option also affects the span.k-chip element through the k-chip-{size} class.

The following values are available for the Size option:

  • Small—small size (applies the k-input-sm class to the wrapping span element)
  • Medium—medium size (applies the k-input-md class to the wrapping span element)
  • Large—large size (applies the k-input-lg class to the wrapping span element)

The following example demonstrates how to set Size in the declaration of the DropDownTree:

@(Html.Kendo().DropDownTree()
    .Name("dropdowntree-single")
    .HtmlAttributes(new { style = "width: 100%" })
    .Height("auto")
    .Placeholder("Select Product")
    .DataValueField("id")
    .Size(ComponentSize.Large)
    .Items(items =>
    {
        items.Add().Text("Furniture").Id("1").Expanded(true)
            .Items(children =>
            {
                children.Add().Text("Tables & Chairs").Id("2");
                children.Add().Text("Sofas").Id("3");
                children.Add().Text("Occasional Furniture").Id("4");
                children.Add().Text("Childrens furniture").Id("5");
                children.Add().Text("Beds").Id("6");
            });
        items.Add().Text("Decor").Id("7")
            .Items(children =>
            {
                children.Add().Text("Bed Linen").Id("8");
                children.Add().Text("Curtains & Blinds").Id("9");
                children.Add().Text("Carpets").Id("10");
                children.Add().Text("Rugs").Id("11");
                children.Add().Text("Carpets").Id("12");
            });
    })
)

The default size value is Medium and it is applied to the span wrapping element through the k-input-md class.

Below is the HTML of the DropDownTree that is affected from the Size option. The changes are applied to the span.k-dropdowntree wrapping element:

<span class="k-dropdowntree k-picker k-dropdowntree-clearable k-picker-solid k-picker-lg k-rounded-full">
</span>

The HTML when multiple selection is configured:

<span class="k-dropdowntree k-input k-input-solid k-dropdowntree-clearable k-input-lg k-rounded-full">
</span>

Rounded

The Rounded option controls the border radius of the DropDownTree. The class that corresponds to the Rounded option is k-rounded-{rounded}.

The following values are available for the Rounded option:

  • Small—small border radius (applies the k-rounded-sm class to the wrapping span element)
  • Medium—medium border radius (applies the k-rounded-md class to the wrapping span element)
  • Large—large border radius (applies the k-rounded-lg class to the wrapping span element)
  • Full—largest (ellipse-like) border radius (applies the k-rounded-full class to the wrapping span element)

The default value is Full. It applies the k-rounded-full class to the span.k-dropdowntree wrapping element that contains the HTML of the component.

The following example demonstrates how to set Rounded in the declaration of the DropDownTree:

@(Html.Kendo().DropDownTree()
    .Name("dropdowntree-single")
    .HtmlAttributes(new { style = "width: 100%" })
    .Height("auto")
    .Placeholder("Select Product")
    .DataValueField("id")
    .Rounded(Rounded.Medium)
    .Items(items =>
    {
        items.Add().Text("Furniture").Id("1").Expanded(true)
            .Items(children =>
            {
                children.Add().Text("Tables & Chairs").Id("2");
                children.Add().Text("Sofas").Id("3");
                children.Add().Text("Occasional Furniture").Id("4");
                children.Add().Text("Childrens furniture").Id("5");
                children.Add().Text("Beds").Id("6");
            });
        items.Add().Text("Decor").Id("7")
            .Items(children =>
            {
                children.Add().Text("Bed Linen").Id("8");
                children.Add().Text("Curtains & Blinds").Id("9");
                children.Add().Text("Carpets").Id("10");
                children.Add().Text("Rugs").Id("11");
                children.Add().Text("Carpets").Id("12");
            });
    })
)

When single selection is used, the changes are applied to the span.k-dropdowntree wrapping element:

<span class="k-dropdowntree k-picker k-dropdowntree-clearable k-picker-solid k-picker-md k-rounded-md">
</span>

The HTML when multiple selection is enabled:

<span class="k-dropdowntree k-input k-input-md k-dropdowntree-clearable k-input-solid k-rounded-md k-state-border-down">
</span>

FillMode

The FillMode option controls how color is applied to the component. The structure of the class is k-picker-{fillMode}.

The following values are available for the FillMode option:

  • Solid—applies the k-input-solid class to the wrapping span element
  • Flat—applies the k-input-flat class to the wrapping span element
  • Outline—applies the k-input-outline class to the wrapping span element

The default value is Solid and it is applied to the span.k-dropdowntree wrapping element through the k-picker-solid class.

The following example demonstrates how to set FillMode in the declaration of the DropDownTree:

@(Html.Kendo().DropDownTree()
    .Name("dropdowntree-single")
    .HtmlAttributes(new { style = "width: 100%" })
    .Height("auto")
    .Placeholder("Select Product")
    .DataValueField("id")
    .FillMode(FillMode.Outline)
    .Items(items =>
    {
        items.Add().Text("Furniture").Id("1").Expanded(true)
            .Items(children =>
            {
                children.Add().Text("Tables & Chairs").Id("2");
                children.Add().Text("Sofas").Id("3");
                children.Add().Text("Occasional Furniture").Id("4");
                children.Add().Text("Childrens furniture").Id("5");
                children.Add().Text("Beds").Id("6");
            });
        items.Add().Text("Decor").Id("7")
            .Items(children =>
            {
                children.Add().Text("Bed Linen").Id("8");
                children.Add().Text("Curtains & Blinds").Id("9");
                children.Add().Text("Carpets").Id("10");
                children.Add().Text("Rugs").Id("11");
                children.Add().Text("Carpets").Id("12");
            });
    })
)

The FillMode.Outline value is reflected through the respective classes applied to the span.k-dropdowntree wrapping element:

<span class="k-dropdowntree k-picker k-picker-outline k-picker-md k-rounded-full k-dropdowntree-clearable">
</span>

The HTML when multiple selection is enabled:

<span class="k-dropdowntree k-input k-input-outline k-input-md k-dropdowntree-clearable k-rounded-full k-state-border-down">
</span>

Old vs New Rendering

Below you will find the differences between the old and the new rendering of the DropDownTree. Some of the HTML elements rendered before are replaced with others in the new rendering.

Old Single Selection Rendering:

 <span title="" class="k-widget k-dropdowntree k-dropdowntree-clearable k-state-border-down" unselectable="on"
    tabindex="0" aria-disabled="false" aria-haspopup="tree" aria-expanded="true"
    aria-owns="d5464a25-e452-4eee-bd7a-8aebcb918a00" role="listbox"
    aria-activedescendant="a18f7c00-9e73-4db1-ac81-b41bf193b1dc">
    <span unselectable="on" class="k-dropdown-wrap k-state-default k-state-active k-state-border-down">
        <span unselectable="on" class="k-input k-readonly" role="option" aria-selected="true"
            id="a18f7c00-9e73-4db1-ac81-b41bf193b1dc">Select ...</span>
        <span unselectable="on" class="k-clear-value k-hidden" title="clear" role="button" tabindex="-1">
            <span class="k-icon k-i-x"></span>
        </span>
        <span role="button" unselectable="on" class="k-select"
            aria-label="select"><span class="k-icon k-i-arrow-60-down"></span>
        </span></span>
    <input id="dropdowntree" style="width: 100%; display: none;" data-role="dropdowntree">
</span>

New Single Selection Rendering:

<span class="k-dropdowntree k-picker k-picker-solid k-picker-md k-rounded-md k-dropdowntree-clearable k-hover"
        unselectable="on" tabindex="0" aria-disabled="false" aria-haspopup="tree" aria-expanded="false"
        aria-owns="d380d0fa-2f21-4d11-90bf-d21226c147a6" role="listbox"
        aria-activedescendant="de8203cb-189a-4341-92aa-d7337a65ece4" style="">
    <span unselectable="on"
    class="k-input-inner k-readonly" role="option" aria-selected="true"
    id="de8203cb-189a-4341-92aa-d7337a65ece4">Select ...</span>
    <span unselectable="on" class="k-clear-value k-hidden" title="clear" role="button" tabindex="-1"><span
        class="k-icon k-i-x"></span>
    </span>
    <button unselectable="on"
        class="k-select k-input-button k-button k-button-md k-rounded-md k-button-solid k-button-solid-base k-icon-button"
        aria-label="select"><span class="k-icon k-i-arrow-60-down k-button-icon"></span>
    </button>
    <input id="dropdowntree" data-role="dropdowntree" style="display: none;">
</span>

Old Multiple Selection Rendering:

 <div class="k-widget k-dropdowntree k-dropdowntree-clearable" unselectable="on" title=""
    aria-owns="dace9881-3aee-4a51-8940-8c3278b77ff1" tabindex="0" aria-disabled="false" aria-haspopup="tree"
    aria-expanded="false" role="listbox" aria-multiselectable="true"
    aria-describedby="d69ca64c-e5d4-4a63-abd5-01065574092c_tagList" style="width: 100%;">
    <div class="k-multiselect-wrap k-floatwrap" unselectable="on">
        <ul unselectable="on" data-template="tagTemplate" data-bind="source: tags" class="k-reset"
            id="d69ca64c-e5d4-4a63-abd5-01065574092c_tagList" data-stop="true" role="none">
            <li class="k-button " unselectable="on" role="option" aria-selected="true"><span
                    unselectable="on">Sofas</span><span aria-hidden="true" title="delete" aria-label="delete"
                    class="k-select"><span class="k-icon k-i-close"></span></span></li>
        </ul><span unselectable="on" class="k-input k-readonly" role="option" aria-selected="true"
            style="display: none;">Select ...</span><span unselectable="on" class="k-clear-value" title="clear"
            role="button" tabindex="-1"><span class="k-icon k-i-x"></span></span>
    </div><input id="dropdowntree" style="width: 100%; display: none;" data-role="dropdowntree" multiple="multiple">
</div>

New Multiple Selection rendering:

<span class="k-dropdowntree k-input k-input-solid k-input-md k-rounded-md k-dropdowntree-clearable k-hover"
        unselectable="on" title="" aria-owns="faa1c5a4-47ae-4e8a-b0c5-b8fa95443a5a" tabindex="0" aria-disabled="false"
        aria-haspopup="tree" aria-expanded="false" role="listbox" aria-multiselectable="true"
        aria-describedby="f809adf5-0db6-4945-a17a-9b408a9fd86b_tagList" style="">
    <select id="dropdowntree1"
        data-role="dropdowntree" multiple="multiple" style="display: none;"></select>
    <div unselectable="on" class="k-input-values k-chip-list k-chip-list-md" data-template="tagTemplate"
        data-bind="source: tags" id="f809adf5-0db6-4945-a17a-9b408a9fd86b_tagList" data-stop="true" role="none">
        <span unselectable="on" class="k-input-inner k-readonly" role="option" aria-selected="true"
            style="display: flex;">Select ...</span>
    </div>
    <span unselectable="on" class="k-clear-value" title="clear"
    role="button" tabindex="-1"><span class="k-icon k-i-x"></span></span>
</span>

Visual Backwards Compatibility

In order to achieve the same look and feel as the old rendering, make sure to use the classes available in the new rendering. Visit the CSS Classes Migration and JQuery Selectors Migration sections of the Appearance Overview article for additional information.

If you use a LESS theme, the new rendering will support only the default options.

See Also

In this article