PDFTron WebViewer Class: RubberStampCreateTool

Class: RubberStampCreateTool

Tools. RubberStampCreateTool

Represents the tool for creating Annotations.StampAnnotation.

new RubberStampCreateTool(docViewer)

Creates a new instance of the RubberStampCreateTool.

Parameters:

Name	Type	Description
`docViewer`	CoreControls.DocumentViewer	an instance of DocumentViewer.

Extends

Tools.Tool

Methods

addCustomStamp(data)

Add a single custom stamp to tool's list

Parameters:

Name	Type	Description
`data`	Tools.RubberStampCreateTool.CustomStampData	The custom stamp data

addStamp()

Add the stamp to the document.

contextMenu(e)

The function called when a context menu should be shown. Use e.preventDefault to disable the default browser context menu

Parameters:

Name	Type	Description
`e`		the event object

Inherited From:

Tools.Tool#contextMenu

drawCustomStamp(options)

Draw custom stamp annotation onto a canvas

Parameters:

Name Type Description

options

object

An object that can contain the following optional parameters

Properties

Name	Type	Argument	Description
`title`	string	<optional>	Custom stamp's main text
`subtitle`	string	<optional>	Time format text used as a custom timestamp, e.g. "DD-MM-YYYY"
`color`	string	<optional>	Fill color value, see Annotation.Color
`canvas`	string	<optional>	Canvas to draw this annotation
`width`	string	<optional>	Default width of stamp
`height`	string	<optional>	Default height of stamp
`canvasParent`	string	<optional>	Parent DOM element of canvas

getCustomStampAnnotations()

Get array of custom annotations.

Returns:

Type: Array.<Annotations.Annotation>

getCustomStamps()

Returns array of objects representing the custom stamps

Returns:

An array of objects representing the custom stamps

Type: Array.<Tools.RubberStampCreateTool.CustomStampData>

getDocumentViewer()

Returns the instance of DocumentViewer for this tool.

Inherited From:

Tools.Tool#getDocumentViewer

Returns:

the instance of DocumentViewer for this tool.

Type: CoreControls.DocumentViewer

getMouseLocation(e)

Takes an event object from a mouse event and converts the location into window coordinates

Parameters:

Name	Type	Description
`e`		the event object containing mouse coordinates

Inherited From:

Tools.Tool#getMouseLocation

Returns:

returns an object with x and y coordinates of the mouse cursor in the viewer

Type: CoreControls.Math.Point

getPreview(annotation, parameters)

Gets the preview about how the annot will be drawn on the document

Parameters:

Name	Type	Description
`annotation`	Annotations.StampAnnotation	annotation to get the preview for.
`parameters`	Object	canvas parameters and optional text for annotation, e.g. translated text. e.g. { canvasHeight: number, canvasWidth: number, text: string }

Returns:

A base64 string of the preview image

Type: String

getStandardStampAnnotations()

Get array of standard stamp annotations.

Returns:

Type: Promise.<Array.<Annotations.Annotation>>

getStandardStamps()

Returns array of objects representing the built-in, default stamps

Returns:

Type: Array.<object>

getStandardStamps()

Returns array of objects representing the standard stamps

Returns:

An array of objects representing the standard stamps

Type: Array.<object>

hidePreview()

Hide the preview element

isEmptyStamp()

Checks if the underlying annotation is empty. If the underlying annotation is a StampAnnotation type return true.

Returns:

Type: boolean

keyDown(e)

The function called when a keyboard key is down.

Parameters:

Name	Type	Description
`e`		the event object containing keyboard key data.

Inherited From:

Tools.Tool#keyDown

mouseDoubleClick(e)

The function called when the mouse left button is double clicked.

Parameters:

Name	Type	Description
`e`		the event object containing mouse coordinates.

Inherited From:

Tools.Tool#mouseDoubleClick

mouseLeftDown(e)

The function called when the left mouse button is down

Parameters:

Name	Type	Description
`e`		The event object containing mouse coordinates.

Inherited From:

Tools.Tool#mouseLeftDown

mouseLeftUp(e)

The function called when the left mouse button is up. Typically, annotations are created and added to the annotation manager at this point.

Parameters:

Name	Type	Description
`e`		The event object containing mouse coordinates.

Inherited From:

Tools.Tool#mouseLeftUp

mouseMove(e)

The function called when the mouse moves.

Parameters:

Name	Type	Description
`e`		The event object containing mouse coordinates.

Inherited From:

Tools.Tool#mouseMove

mouseRightDown(e)

The function called when the right mouse button is down.

Parameters:

Name	Type	Description
`e`		The event object containing mouse coordinates.

Inherited From:

Tools.Tool#mouseRightDown

off( [type] [, fn])

Remove a handler of the given event name

Parameters:

Name	Type	Argument	Description
`type`	string \| number	<optional>	The name of the event to remove the handler of. If type is undefined, all the handlers of the object will be removed
`fn`	function	<optional>	The handler associated with this event to be removed. If fn is undefined, all the handlers of the given event name will be removed

Inherited From:

EventHandler#off

Returns:

Returns the object that 'off' is being called on

Type: object

Example

annotManager.off();
annotManager.off('annotationChanged');
annotManager.off('annotationChanged', fn);

on(type, fn)

Add a handler to the given event name

Parameters:

Name	Type	Description
`type`	string \| number	The name of the event to listen to
`fn`	function	The handler to be called when the event is triggered

Inherited From:

EventHandler#on

Returns:

Returns the object that 'on' is being called on

Type: object

Example

annotManager.on('annotationChanged', (annotations, action) => {
  ...
});

one(type, fn)

Same as 'on' except the handler will be called only once

Parameters:

Name	Type	Description
`type`	string \| number	The name of the event to listen to
`fn`	function	The handler to be called when the event is triggered

Inherited From:

EventHandler#one

Returns:

Returns the object that 'one' is being called on

Type: object

Example

annotManager.one('annotationChanged', (annotations, action) => {
 ...
});

setCustomDrawFunction(callback)

Sets a custom function to be used for drawing extra content on top of custom stamps, enabling customization of the CanvasRenderingContext2D of the Canvas element used for Rubber Stamps

Parameters:

Name	Type	Description
`callback`	function	A callback side effect function that takes a two parameters. The first is assumed to be the type CanvasRenderingContext2D, and modifies the parameter for the purposes of custom drawing behavior on top of the default stamp behavior. The second parameter is optional, and is assumed to be an instance of the Annotations.Annotation class, wherein custom behavior for the stamp annotation being modified can be added (i.e. conditionally apply custom drawing on certain annotations only)

Example

WebViewer(
 // ...
).then(instance => {
  const { docViewer } = instance;
  const tool = docViewer.getTool('AnnotationCreateRubberStamp');
  tool.setCustomDrawFunction((ctx, annotation) => {
    const { Icon } = annotation;
    // `Icon` contains the text content of the stamp
    // This example conditionally renders custom content on the stamp only
    // if the contents of the stamp are in the approved list of stamps to
    // draw on
    const stampsToDrawOn = [
      'Approved',
      'Completed',
      'Final',
    ];
    if (stampsToDrawOn.includes(Icon)) {
      // Arbitrary example where an image is available in the DOM
      const img = document.getElementById('my-company-logo');
      ctx.drawImage(
        img, // The image to render
        0, // The X coordinate of where to place the image
        0, // The Y coordinate of where the place the image
        25, // The width of the image in pixels
        25, // The height of the image in pixels
      );
    }
  });
});

setCustomStamps(stamps)

Accepts and sets an array of objects representing custom stamps

Parameters:

Name	Type	Description
`stamps`	Array.<Tools.RubberStampCreateTool.CustomStampData>	An array of objects representing custom stamps Example: [ { "title": "Sample Text", "subtitle": "DD-MM-YYYY", "color": window.Annotations.Color(0,0,0) } ]

setName(name)

Set the name of the tool, which can be accessed by toolObject.name

Parameters:

Name	Type	Description
`name`	string	name of the tool

Inherited From:

Tools.Tool#setName

setRubberStamp(annotation)

Sets the underlying annotation used by the tool

Parameters:

Name	Type	Description
`annotation`	Annotations.StampAnnotation	annotation to set

setStandardStamps(stamps)

Accepts and sets an array of objects representing standard stamps

Parameters:

Name	Type	Description
`stamps`	Array.<object>	An array of objects representing the standard stamps

setStyles(newStyles)

Set the style for the tool, which will be applied to annotations drawn afterwards

Parameters:

Name	Type	Description
`newStyles`	object \| function	if an object is used, it should contain properties of the new styles. If a function is used, the current styles will be passed as its argument and the function should return an object which contains properties of the new styles. Example of valid properties: StrokeColor, TextColor, FillColor, FontSize, Opacity, StrokeThickness, Precision, Scale, OverlayText, Style and Dashes.

Inherited From:

Tools.Tool#setStyles

showPreview()

Shows the preview about how the underlying annot looks like if it's drawn.

switchIn(oldTool)

The function called when this tool is selected. Typically use for changing mouse cursors, and initializing states for the tool.

Parameters:

Name	Type	Description
`oldTool`	Tools.Tool	the Tool class that was previously selected.

Inherited From:

Tools.Tool#switchIn

switchOut(newTool)

The function called when this tool is deselected. Typically use for changing mouse cursors, and cleaning up states for the tool.

Parameters:

Name	Type	Description
`newTool`	Tools.Tool	the Tool class that was newly selected.

Inherited From:

Tools.Tool#switchOut

trigger(type [, data])

Calls the handlers of the event name with given data

Parameters:

Name	Type	Argument	Description
`type`	string \| number		event name of which the handlers will be called.
`data`	*	<optional>	data that will be passed to the handlers. If data is an array, it will be spread and then passed to the handlers

Inherited From:

EventHandler#trigger

Returns:

Returns the object that 'trigger' is being called on

Type: object

Example

annotManager.trigger('annotationChanged');
annotManager.trigger('annotationChanged', [[annotation], 'add', {}]);

Type Definitions

CustomStampData

Type:

Object

Properties:

Name	Type	Argument	Description
`title`	string	<optional>	Custom stamp's main text
`subtitle`	string	<optional>	Time format text used as a custom timestamp, e.g. "DD-MM-YYYY"
`color`	Annotations.Color	<optional>	Background color value