Adding configuration to a Property Editor

Adding configuration options to the editor.

Overview

This is step two in our guide to building a Property Editor. This step continues work on the Suggestion Data Type we built in part one but goes further to show how to add configuration options to our editor.

The steps we will go through in the second part are:

Configuration

An important part of building good Property Editors is to build something flexible, so we can reuse it many times, for different things. Like the Rich Text Editor in Umbraco, which allows us to choose which buttons and stylesheets we want to use on each instance of the editor.

An editor can be used again and again, with different configurations, and that is what we will be working on now.

Adding settings object to umbraco-package.json

To add a Data Type configuration field when using our Suggestion Property Editor, open the umbraco-package.json file. Inside the meta object, we can add the settings object, which has the optional objects properties and defaultData.

  1. Add some properties:

umbraco-package.json
    ...
    "meta": {
        ...
        "settings": {
            "properties": [
                {
                    "alias": "disabled",
                    "label": "Disabled",
                    "description": "Disables the suggestion button",
                    "propertyEditorUiAlias": "Umb.PropertyEditorUi.Toggle"
                },
                {
                    "alias": "placeholder",
                    "label": "Placeholder text",
                    "description": "A nice placeholder description to help out our editor!",
                    "propertyEditorUiAlias": "Umb.PropertyEditorUi.TextBox"
                },
            ]
        }
        ...
    }

Above we added two configuration fields. Each entry of the properties collection represents a Configuration field. Each has the information needed for a field.

The Property Editor UI needs to be declared as it declares what User Interface should be used for this field.

  • The field with the label "Disabled" uses the Toggle Property Editor UI. This will allow us to turn the suggestion button on/off and will provide the user with a toggle button.

  • The field with the label "Placeholder text" uses the TextBox Property Editor UI. This will allow the user to write a text.

  1. We can now also set some default data on our new configurations:

umbraco-package.json
  ...
  "meta": {
    ...
    "settings": {
      "properties": [...],
      "defaultData": [
        {
          "alias": "disabled",
          "value": true
        },
        {
          "alias": "placeholder",
          "value": "Write a suggestion"
        }
      ]
   }
   ...
See the entire file: umbraco-package.json
umbraco-package.json
{
    "$schema": "../../umbraco-package-schema.json",
    "name": "My.AwesomePackage",
    "version": "0.1.0",
    "extensions": [
        {
            "type": "propertyEditorUi",
            "alias": "My.PropertyEditorUi.Suggestions",
            "name": "My Suggestions Property Editor UI",
            "element": "/App_Plugins/Suggestions/dist/suggestions.js",
            "elementName": "my-suggestions-property-editor-ui",
            "meta": {
                "label": "Suggestions",
                "icon": "icon-list",
                "group": "common",
                "propertyEditorSchemaAlias": "Umbraco.TextBox",
                "settings": {
                    "properties": [
                        {
                            "alias": "disabled",
                            "label": "Disabled",
                            "description": "Disables the suggestion button",
                            "propertyEditorUiAlias": "Umb.PropertyEditorUi.Toggle"
                        },
                        {
                            "alias": "placeholder",
                            "label": "Placeholder text",
                            "description": "A nice placeholder description to help out our editor!",
                            "propertyEditorUiAlias": "Umb.PropertyEditorUi.TextBox"
                        }
                    ],
                    "defaultData": [
                        {
                            "alias": "disabled",
                            "value": true
                        },
                        {
                            "alias": "placeholder",
                            "value": "Write a suggestion"
                        }
                    ]
                }
            }
        }
    ]
}
  1. Save the files and rebuild the application.

    • To access the configuration options, enable/disable the disabled option.

    • Additionally, you can set a default value in the placeholder field and see the Suggestions Data Type at play.

  2. Since we are using the Umbraco.TextBox Property Editor Schema, we inherit a maxChars configuration field from the Property Editor Schema. Let's save it as 20.

Using the configuration

The next step is to gain access to our new configuration options. For this, open the suggestions-property-editor-ui.element.ts file.

  1. Create some state variables that can store our configurations:

suggestions-property-editor-ui.element.ts
  @state()
  private _disabled?: boolean;

  @state()
  private _placeholder?: string;

  @state()
  private _maxChars?: number;
  1. Let's create a config property. Add a new import and add the following property:

suggestions-property-editor-ui.element.ts
import { type UmbPropertyEditorConfigCollection } from "@umbraco-cms/backoffice/property-editor";
  1. Look up the alias of the config and then grab the value by said alias:

suggestions-property-editor-ui.element.ts
  @property({ attribute: false })
  public set config(config: UmbPropertyEditorConfigCollection) {
    this._disabled = config.getValueByAlias("disabled");
    this._placeholder = config.getValueByAlias("placeholder");
    this._maxChars = config.getValueByAlias("maxChars");
  }

We can now use the configurations. Let's use the placeholder and maxChars for the input field and the disabled option for the suggestion button.

  1. Add a new import ifDefined :

suggestions-property-editor-ui.element.ts
import { ifDefined } from "@umbraco-cms/backoffice/external/lit";
  1. Update the render method:

suggestions-property-editor-ui.element.ts
  render() {
    return html`
      <uui-input
        id="suggestion-input"
        class="element"
        label="text input"
        placeholder=${ifDefined(this._placeholder)}
        maxlength=${ifDefined(this._maxChars)}
        .value=${this.value || ""}
        @input=${this.#onInput}
      >
      </uui-input>
      <div id="wrapper">
        <uui-button
          id="suggestion-button"
          class="element"
          look="primary"
          label="give me suggestions"
          ?disabled=${this._disabled}
          @click=${this.#onSuggestion}
        >
          Give me suggestions!
        </uui-button>
        <uui-button
          id="suggestion-trimmer"
          class="element"
          look="outline"
          label="Trim text"
        >
          Trim text
        </uui-button>
      </div>
    `;
  }
See the entire file: suggestions-property-editor-ui.element.ts
suggestions-property-editor-ui.element.ts
import { LitElement, css, html, customElement, property, state, ifDefined } from "@umbraco-cms/backoffice/external/lit";
import { type UmbPropertyEditorUiElement } from "@umbraco-cms/backoffice/extension-registry";
import { type UmbPropertyEditorConfigCollection } from "@umbraco-cms/backoffice/property-editor";
import { UmbPropertyValueChangeEvent } from '@umbraco-cms/backoffice/property-editor';

@customElement('my-suggestions-property-editor-ui')
export default class MySuggestionsPropertyEditorUIElement extends LitElement implements UmbPropertyEditorUiElement {
    @property({ type: String })
    public value = "";

    @state()
    private _disabled?: boolean;

    @state()
    private _placeholder?: string;

    @state()
    private _maxChars?: number;

    @state()
    private _suggestions = [
        "You should take a break",
        "I suggest that you visit the Eiffel Tower",
        "How about starting a book club today or this week?",
        "Are you hungry?",
    ];

    @property({ attribute: false })
    public set config(config: UmbPropertyEditorConfigCollection) {
        this._disabled = config.getValueByAlias("disabled");
        this._placeholder = config.getValueByAlias("placeholder");
        this._maxChars = config.getValueByAlias("maxChars");
    }

    #onInput(e: InputEvent) {
        this.value = (e.target as HTMLInputElement).value;
        this.#dispatchChangeEvent();
    }

    #onSuggestion() {
        const randomIndex = (this._suggestions.length * Math.random()) | 0;
        this.value = this._suggestions[randomIndex];
        this.#dispatchChangeEvent();
    }

    #dispatchChangeEvent() {
        this.dispatchEvent(new UmbPropertyValueChangeEvent());
    }

    render() {
        return html`
            <uui-input
                id="suggestion-input"
                class="element"
                label="text input"
                placeholder=${ifDefined(this._placeholder)}
                maxlength=${ifDefined(this._maxChars)}
                .value=${this.value || ""}
                @input=${this.#onInput}
            >
            </uui-input>
            <div id="wrapper">
                <uui-button
                    id="suggestion-button"
                    class="element"
                    look="primary"
                    label="give me suggestions"
                    ?disabled=${this._disabled}
                    @click=${this.#onSuggestion}
                >
                    Give me suggestions!
                </uui-button>
                <uui-button
                    id="suggestion-trimmer"
                    class="element"
                    look="outline"
                    label="Trim text"
                >
                    Trim text
                </uui-button>
            </div>
        `;
    }

    static styles = [
        css`
            #wrapper {
                margin-top: 10px;
                display: flex;
                gap: 10px;
            }
            .element {
                width: 100%;
            }
        `,
    ];
}

declare global {
    interface HTMLElementTagNameMap {
        'my-suggestions-property-editor-ui': MySuggestionsPropertyEditorUIElement;
    }
}
  1. In the suggestions folder run npm run build and then run the project. In the content section of the Backoffice you will see the new changes in the property editor:

Going further

We have now added some configurations to our data type and used them in our Property Editor.

In the next step, we are going to integrate context with our Property Editor.

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