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Picker

README.md

Tag Picker

The Tag Picker code component provides the following features:

  1. Binds to an input collection for the chosen tags
  2. Binds to an input collection for suggested tags
  3. Allows users to select from suggestions or enter a free text tag
  4. Raises On Change event when a user adds or removes a tag
  5. Allows programmatic Set Focus

Datasets

The Tag Picker has the following input datasets:

  • Tags - A collection/table of tags. The app is responsible for adding/removing tags in responsive to the component raising Add/Remove events (see below).
    • TagDisplayName - set to the name of the column that holds the tag display name
  • Suggestions - A collection/table of suggestions.
    • SuggestionDisplayName - set to the name of the column that holds the suggestion display name.
    • SuggestionSubDisplayName (Optional) - set to the name of the column that holds the secondary line of text.

The suggestions dataset should be filtered using the SearchTerm output property - e.g.

Search(colSuggestions,TagPicker.SearchTerm,"name")

Input Properties

The TagPicker component has the following input properties:

  • Tag Max Width - The maximum width of the tags when rendering. Overflow text will be truncated with ellipsis's and a hover tooltip shows the full text.

  • Allow Free Text - When typing a value, do not not automatically select the first suggestion so that a free text entry can be provided rather than selecting from a pre-defined list.

  • Search Term To Short Message - The message to display when the Search Term is less than the Minimum Search Term Length.

  • Hint Text - The message to display inside the Picker when no search term is provided.

  • No Suggestions Found Message - The message to display when the Suggestions collection contains no results.

  • Minimum Search Term Length - The minimum number of character to trigger the suggestions flyout.

  • Max Tags - The maximum number of tags that can be added. After this number, the Tag Picker will be re-only until a tag is removed.

  • Error - True when the red error border should be displayed.

  • Theme - Accepts a JSON string that is generated using Fluent UI Theme Designer (windows.net). Leaving this blank will use the default theme defined by Power Apps.

  • Font Size - the font size of the tags shown inside the Picker.

  • Border Radius - the border radius of the tags shown inside the Picker.

  • Item Height - the height of the tags (pixesl) shown inside the Picker.

  • AccessibilityLabel - Screen reader aria-label

  • Input Event - Set to the event to sent to the TagPicker:

    • SetFocus - Set a context variable that is bound to the Input Event property - followed by a random element to ensure the event fires the update to the code component. E.g.

      UpdateContext({
    ctxTagPickerSetFocus:"SetFocus" & Text(Rand())
});

On Change event

The TagPicker component raises an OnChange event when tags are added or removed. The properties used are:

  • TagEvent - the name of the event raised
  • TagKey - the key of the item that has raised the event (if the event is related to a tag)

The event should contain an expression similar to:

If(TagPicker.TagEvent="Add" && CountRows(Filter(colTags,name=TagPicker.TagDisplayName))=0,
    Collect(colTags,{name:TagPicker.TagDisplayName})
);

If(TagPicker.TagEvent="Remove",
 RemoveIf(colTags,name=Text(TagPicker.TagDisplayName))
);

Output Properties

The TagPicker component has the following output properties:

  • Search Term - The text entered into the Tag Picker that can be used for filtering the suggestions dataset.
  • Tag Display Name - the text that is used to create a new Tag when the On Change event is fired
  • Auto Height - When the tag picker wraps onto multiple lines, the Auto Height property can be used to control the height of a responsive container height.