mlreportgen.dom.Watermark Class

Namespace: mlreportgen.dom

Add watermark to pages in sections of PDF reports

Description

Creates a watermark object that you can add to a section of a PDF report. A watermark is an image that appears in the background of a page, such as the word Draft or Confidential. It runs behind the text on each page you apply it to. You can use any of these file types:

• .emf

• .gif

• .jpg

• .pdf

• .png

• .svg

• .tiff

The mlreportgen.dom.Watermark class is a handle class.

Creation

Description

wm = Watermark(image) creates a Watermark object based on the specified image, and returns a Watermark object.

Input Arguments

image — Image to use as watermark

path name

Image to use as the watermark, specified as the image path name. Use any of these file types:

• .emf

• .gif

• .jpg

• .pdf

• .png

• .svg

• .tiff

Properties

Path — Path of image file

character vector | string scalar

Path of image file, specified as a character vector or string scalar.

Attributes:

GetAccess	public
SetAccess	private
NonCopyable	true
Transient	true

Data Types: char | string

Height — Watermark height

character vector | string scalar

Watermark height, specified as character vector or string scalar that contains a number followed by an abbreviation for a unit of measurement. For example, "10px" specifies 10 pixels. Valid abbreviations are:

• "px" — Pixels

• "cm" — Centimeters

• "in" — Inches

• "mm" — Millimeters

• "pc" — Picas

• "pt" — Points

Alternatively, You can specify the height using the Watermark.Style property. For example:

Watermark.Style = {Height("4in")};

Attributes:

GetAccess	public
SetAccess	public
NonCopyable	true

Data Types: char | string

Width — Watermark width

character vector | string scalar

Watermark width, specified as character vector or string scalar that contains a number followed by an abbreviation for a unit of measurement. For example, "10px" specifies 10 pixels. Valid abbreviations are:

• "px" — Pixels

• "cm" — Centimeters

• "in" — Inches

• "mm" — Millimeters

• "pc" — Picas

• "pt" — Points

Alternatively, you can specify the width using the Watermark.Style property. For example:

Watermark.Style = {Width("4in")};

Attributes:

GetAccess	public
SetAccess	public
NonCopyable	true

Data Types: char | string

Style — Format specification

{} (default) | array of DOM format objects

Format specification for this document element object, specified as an array of DOM format objects. The formats specified by this property override corresponding formats specified by the StyleName property of this element. Formats that do not apply to this document element object are ignored.

Attributes:

GetAccess	public
SetAccess	public
NonCopyable	true

CustomAttributes — Custom attributes of document element

[] (default) | array of mlreportgen.dom.CustomAttribute objects

Custom attributes of the document element, specified as an array of mlreportgen.dom.CustomAttribute objects. The custom attributes must be supported by the output format of the document element to which this object is appended.

Attributes:

GetAccess	public
SetAccess	public
NonCopyable	true

Tag — Tag

character vector | string scalar

Tag, specified as a character vector or string scalar. The DOM API generates a session-unique tag as part of the creation of this object. The generated tag has the form CLASS:ID, where CLASS is the object class and ID is the value of the Id property of the object. Use this value to help identify where an issue occurs during document generation.

Attributes:

GetAccess	public
SetAccess	public
NonCopyable	true

Data Types: char | string

Id — Object identifier

character vector | string scalar

Object identifier, specified as a character vector or string scalar. The DOM API generates a session-unique identifier when it creates the document element object.

Attributes:

GetAccess	public
SetAccess	public
NonCopyable	true

Data Types: char | string

Examples

Create and Insert Watermark

This example shows how to create a watermark programmatically and then apply it to the current layout. Creating the watermark programmatically simplifies files management, because you do not need to store the image file and keep track of its location.

Using MATLAB® commands, create an image file programmatically. Using an SVG image file maintains the resolution as the image scales. After you write the image to a file, you can delete the figure.

 wmname = 'wm';
 wmtype =  'svg';
 wmfilename = [wmname '.' wmtype];

 subplot('Position',[0, 0, 1, 1]);
 axis('off');
 text(0.25, 0.25,'Draft', ...
   'Rotation', 45, ...
   'Color', [0.85, 0.85, 0.85], ...
   'FontSize',72);

  print(wmfilename, ['-d' wmtype]);
  delete(gcf);

Create the watermark object wm and apply it to the current page layout. After you generate the report, you can delete the image file specified by the variable wmfilename.

import mlreportgen.dom.*;

d = Document('myreport','pdf');
open(d);

wm = Watermark(wmfilename);
wm.Width = '12in';
wm.Height = [];

d.CurrentPageLayout.Watermark = wm;

append(d,'Hello');
append(d, PageBreak);
append(d,'World');

close(d);
rptview(d.OutputPath);
delete(wmfilename);

Version History

Introduced in R2016b

R2024b: Removal of BMP for image output

Report Generator no longer supports BMP (bitmap) as an output image format. This affects snapshots, images from files, and watermarks in both the Report Explorer and the Report, DOM, and PPT APIs. See print for more information.