143 lines
5.9 KiB
TypeScript
143 lines
5.9 KiB
TypeScript
import PDFDocument from "../PDFDocument";
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import PDFPage from "../PDFPage";
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import { AppearanceProviderFor } from "./appearances";
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import PDFField, { FieldAppearanceOptions } from "./PDFField";
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import { PDFRef, PDFAcroCheckBox } from "../../core";
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/**
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* Represents a check box field of a [[PDFForm]].
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*
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* [[PDFCheckBox]] fields are interactive boxes that users can click with their
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* mouse. This type of [[PDFField]] has two states: `on` and `off`. The purpose
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* of a check box is to enable users to select from one or more options, where
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* each option is represented by a single check box. Check boxes are typically
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* square in shape and display a check mark when they are in the `on` state.
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*/
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export default class PDFCheckBox extends PDFField {
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/**
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* > **NOTE:** You probably don't want to call this method directly. Instead,
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* > consider using the [[PDFForm.getCheckBox]] method, which will create an
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* > instance of [[PDFCheckBox]] for you.
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*
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* Create an instance of [[PDFCheckBox]] from an existing acroCheckBox and ref
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*
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* @param acroCheckBox The underlying `PDFAcroCheckBox` for this check box.
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* @param ref The unique reference for this check box.
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* @param doc The document to which this check box will belong.
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*/
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static of: (acroCheckBox: PDFAcroCheckBox, ref: PDFRef, doc: PDFDocument) => PDFCheckBox;
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/** The low-level PDFAcroCheckBox wrapped by this check box. */
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readonly acroField: PDFAcroCheckBox;
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private constructor();
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/**
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* Mark this check box. This operation is analogous to a human user clicking
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* a check box to fill it in a PDF reader. This method will update the
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* underlying state of the check box field to indicate it has been selected.
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* PDF libraries and readers will be able to extract this value from the
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* saved document and determine that it was selected.
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*
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* For example:
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* ```js
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* const checkBox = form.getCheckBox('some.checkBox.field')
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* checkBox.check()
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* ```
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*
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* This method will mark this check box as dirty, causing its appearance
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* streams to be updated when either [[PDFDocument.save]] or
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* [[PDFForm.updateFieldAppearances]] is called. The updated appearance
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* streams will display a check mark inside the widgets of this check box
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* field.
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*/
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check(): void;
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/**
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* Clears this check box. This operation is analogous to a human user clicking
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* a check box to unmark it in a PDF reader. This method will update the
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* underlying state of the check box field to indicate it has been deselected.
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* PDF libraries and readers will be able to extract this value from the
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* saved document and determine that it was not selected.
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*
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* For example:
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* ```js
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* const checkBox = form.getCheckBox('some.checkBox.field')
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* checkBox.uncheck()
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* ```
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*
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* This method will mark this check box as dirty. See [[PDFCheckBox.check]]
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* for more details about what this means.
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*/
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uncheck(): void;
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/**
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* Returns `true` if this check box is selected (either by a human user via
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* a PDF reader, or else programmatically via software). For example:
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* ```js
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* const checkBox = form.getCheckBox('some.checkBox.field')
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* if (checkBox.isChecked()) console.log('check box is selected')
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* ```
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* @returns Whether or not this check box is selected.
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*/
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isChecked(): boolean;
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/**
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* Show this check box on the specified page. For example:
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* ```js
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* const helvetica = await pdfDoc.embedFont(StandardFonts.Helvetica)
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* const page = pdfDoc.addPage()
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*
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* const form = pdfDoc.getForm()
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* const checkBox = form.createCheckBox('some.checkBox.field')
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*
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* checkBox.addToPage(page, {
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* x: 50,
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* y: 75,
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* width: 25,
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* height: 25,
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* textColor: rgb(1, 0, 0),
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* backgroundColor: rgb(0, 1, 0),
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* borderColor: rgb(0, 0, 1),
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* borderWidth: 2,
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* rotate: degrees(90),
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* })
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* ```
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* This will create a new widget for this check box field.
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* @param page The page to which this check box widget should be added.
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* @param options The options to be used when adding this check box widget.
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*/
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addToPage(page: PDFPage, options?: FieldAppearanceOptions): void;
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/**
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* Returns `true` if any of this check box's widgets do not have an
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* appearance stream for its current state. For example:
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* ```js
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* const checkBox = form.getCheckBox('some.checkBox.field')
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* if (checkBox.needsAppearancesUpdate()) console.log('Needs update')
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* ```
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* @returns Whether or not this check box needs an appearance update.
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*/
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needsAppearancesUpdate(): boolean;
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/**
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* Update the appearance streams for each of this check box's widgets using
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* the default appearance provider for check boxes. For example:
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* ```js
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* const checkBox = form.getCheckBox('some.checkBox.field')
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* checkBox.defaultUpdateAppearances()
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* ```
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*/
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defaultUpdateAppearances(): void;
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/**
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* Update the appearance streams for each of this check box's widgets using
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* the given appearance provider. If no `provider` is passed, the default
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* appearance provider for check boxs will be used. For example:
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* ```js
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* const checkBox = form.getCheckBox('some.checkBox.field')
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* checkBox.updateAppearances((field, widget) => {
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* ...
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* return {
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* normal: { on: drawCheckBox(...), off: drawCheckBox(...) },
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* down: { on: drawCheckBox(...), off: drawCheckBox(...) },
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* }
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* })
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* ```
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* @param provider Optionally, the appearance provider to be used for
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* generating the contents of the appearance streams.
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*/
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updateAppearances(provider?: AppearanceProviderFor<PDFCheckBox>): void;
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private updateWidgetAppearance;
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}
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//# sourceMappingURL=PDFCheckBox.d.ts.map
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