Appearance
In this article, you will find information about the styling options and rendering of the Kendo UI DropDownTree.
For a live example, visit the Appearance Demo of the DropDownTree.
Options
The Kendo UI DropDownTree supports the following styling options:
-
size—configures the overall size of the widget. -
rounded—configures the border radius. -
fillMode—controls how the color is applied.
Size
The size option controls how big or small the DropDownTree looks. The structure of the class for a Single Selection DropDownTree is k-picker-{size}. The structure of the class in Multiple Selection mode is k-input-{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:
-
sm—small size -
md—medium size (default) -
lg—large size -
none—unset
The example below shows a basic configuration and how to set size to "large":
<input id="dropdowntree" />
<script>
$("#dropdowntree").kendoDropDownTree({
size:"large",
dataSource: {
data: [
{
text: "foo", items: [
{ text: "bar" }
]
}
]
}
});
</script>
Below is the HTML that is affected from the configuration. The changes are applied to the span.k-dropdowntree wrapping element:
<span class="k-dropdowntree k-picker k-dropdowntree-clearable k-picker-outline k-picker-lg k-rounded-lg">
</span>
The HTML when multiple selection is configured:
<span class="k-dropdowntree k-input k-input-outline k-dropdowntree-clearable k-input-lg k-rounded-lg">
</span>
Rounded
The rounded option controls how much border radius is applied to the widget. The structure of the class is k-rounded-{size}.
The following values are available for the rounded option:
-
sm—small border radius -
md—medium border radius -
lg—large border radius -
full—ellipse-like border radius -
none—unset
The default value is full and it is applied to the wrapping span.k-dropdowntree element that contains the whole HTML through the k-rounded-full class.
The example below shows a basic DropDownTree configuration and how to set rounded to "medium":
<input id="dropdowntree" />
<script>
$("#dropdowntree").kendoDropDownTree({
rounded:"medium",
dataSource: {
data: [
{
text: "foo", items: [
{ text: "bar" }
]
}
]
}
});
</script>
The changes are applied to the span.k-dropdowntree wrapping element:
<span class="k-dropdowntree k-picker k-dropdowntree-clearable k-picker-outline k-picker-lg k-rounded-md">
</span>
The HTML when multiple selection is configured:
<span class="k-dropdowntree k-input k-input-lg k-dropdowntree-clearable k-input-outline k-rounded-md k-state-border-down">
</span>
FillMode
The fillMode option controls how the color is applied to the widget. The structure of the class is k-picker-{fillMode}.
The following values are available for the fillMode option:
solidflatoutlinenone
The default value is solid and it is applied to the span.k-dropdowntree element through the k-picker-solid class.
The example below shows a basic DropDownTree configuration and how to set fillMode to "outline":
<input id="dropdowntree" />
<script>
$("#dropdowntree").kendoDropDownTree({
fillMode:"outline",
dataSource: {
data: [
{
text: "foo", items: [
{ text: "bar" }
]
}
]
}
});
</script>
The changes are applied to the span.k-dropdowntree wrapping element:
<span class="k-dropdowntree k-picker k-picker-outline k-picker-md k-rounded-md k-dropdowntree-clearable">
</span>
The HTML when multiple selection is configured:
<span class="k-dropdowntree k-input k-input-outline k-input-md k-dropdowntree-clearable k-rounded-md k-state-border-down">
</span>
Rendering
Starting with version R1 2022, the component has a new rendering. For additional information on the decision behind these changes, visit the Components Rendering Overview article.
To review the latest rendering of the component, refer to the HTML specifications in the Kendo UI Themes Monorepo. The tests folder of the repository contains the rendering for all flavors of the components, providing a clear reference for how their elements are structured. The rendering information can help you customize a component's appearance and behavior by applying custom CSS or JavaScript to suit specific design or functional requirements.
Setting the List Width
To customize the width of the DropDownTree list and change its dimensions, use the jQuery width() method.
<input id="dropdowntree">
<script>
$(document).ready(function() {
var dropdowntree = $("#dropdowntree").kendoDropDownTree({
dataSource: [
{
text: "Item 1",
items: [
{ text: "Item 1.1" },
{ text: "Item 1.2" }
]
},
{ text: "Item 2" }
]
}).data("kendoDropDownTree");
dropdowntree.list.width(400);
});
</script>
Setting the Popup Width
You can enable the popup element to automatically adjust its width according to the length of the item label it displays. When the autoWidth option is set to true, the popup will display the content on a single line and will not wrap it up.
<input id="dropdowntree">
<script>
$(document).ready(function() {
var dropdowntree = $("#dropdowntree").kendoDropDownTree({
autoWidth: true,
dataSource: [
{
text: "Item 1",
items: [
{ text: "Item 1.1" },
{ text: "Item 1.2" }
]
},
{ text: "Item 2" }
]
}).data("kendoDropDownTree");
});
</script>