46 lines
1.3 KiB
Plaintext
46 lines
1.3 KiB
Plaintext
[[using-shell-components-ui-singleselect]]
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==== Single Select
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ifndef::snippets[:snippets: ../../test/java/org/springframework/shell/docs]
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A single select component asks a user to choose one item from a list. It is similar to a simple
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dropbox implementation. The following listing shows an example:
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====
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[source, java, indent=0]
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----
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include::{snippets}/UiComponentSnippets.java[tag=snippet6]
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----
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====
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The following image shows typical output for a single select component:
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image::images/component-single-select-1.svg[text input]
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The context object is `SingleItemSelectorContext`. The following table describes its context variables:
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[[singleitemselectorcontext-template-variables]]
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.SingleItemSelectorContext Template Variables
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|===
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|Key |Description
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|`value`
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|The returned value when the component exists.
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|`rows`
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|The visible items, where rows contains maps of name and selected items.
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|`model`
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|The parent context variables (see <<selectorcomponentcontext-template-variables>>).
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|===
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You can pre-select an item by defining it to get exposed. This is
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useful if you know the default and lets the user merely press `Enter` to make a choice.
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The following listing sets a default:
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====
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[source, java, indent=0]
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----
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include::{snippets}/UiComponentSnippets.java[tag=snippet8]
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----
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====
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