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mlreportgen.dom.MessageEventData class

Package: mlreportgen.dom

Holds message triggering message event


Contains the message that triggered a message event.


messageEventDataObj = MessageEventData(msg) creates a message event data object that contains a DOM message (for example, a message of type mlreportgen.dom.ProgressMessage).

The DOM message dispatcher attaches an object of this type to a message event when it dispatches a message. This enables message event listeners to retrieve the dispatched message. You need to create instances of this type only if you want to create your own message dispatcher.

Input Arguments

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A message object, such as an mlreportgen.dom.ProgressMessage object, that triggers a message event.

Output Arguments

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Container for message triggering message event data, represented by an mlreportgen.dom.MessageEventData object.


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ID for this document element, specified as a character vector. The DOM generates a session-unique ID when it creates the document element. You can specify your own ID.

The value of this read-only property is a DOM message object, such as an mlreportgen.dom.ProgressMessage object, that triggers a message event.

Tag for document element, specified as a character vector.

A session-unique ID is generated as part of document element creation. The generated tag has the form CLASS:ID, where CLASS is the class of the element and ID is the value of the Id property of the object. You can specify a tag to replace the generated tag.

For example, to make it easier to identify where an issue occurred during document generation, you can specify your own tag value.


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When you add a dispatcher, the DOM API creates the evtdata object, which is an mlreportgen.dom.MessageEventData object.

import mlreportgen.dom.*;
doctype = 'html';
d = Document('test', doctype);
d.Tag = 'My report';
dispatcher = MessageDispatcher.getTheDispatcher;
l = addlistener(dispatcher, 'Message', ...
   @(src, evtdata) disp(evtdata.Message.formatAsText));
dispatch(dispatcher, ProgressMessage('starting chapter', d));
p = Paragraph('Chapter ');
p.Tag = 'chapter title';
p.Style = { CounterInc('chapter'), CounterReset('table'), WhiteSpace('pre') };
append(p, AutoNumber('chapter'));
append(d, p);
rptview('test', doctype);

Delete the listener to avoid duplicate reporting of message objects during a MATLAB® session.