DocGenerator Help feature

The docJGenerator tool allows to provide a help system in any Swing or JavaFX application. Note that the generated format, and the API, have no relationship at all with the original JavaHelp system.

Overview

To provide a help system for your application, you need to:

• Use the wiki definition (as for any wiki generation), and generate the help content with the help output type. The result will be a zip file which will contain both the wiki and the associated Metadata
• Use the API which is able to produce a help component with this zip file

Note that:

• It is also possible to provide a context-sensitive help on components
• It is possible to specify and create the Help content manually, including the metadata

Help content generation

To generate the help content, you should use the "help" output type. The help content generation will produce by default a zip file in the same directory than the output directory. You can specify the output type in the GUI interface, the command-line, or the configuration file. Several options can be specified to customized the help content generation:

• "helpFileName": the name of the zip file (used only if the path of the zip file is not defined)
• "helpFile": the path of the zip file
• "helpOptimizedForSwing": specifies if the help content is optimized for the Swing API (true by default). If this property is set to false, then the help content will be optimized for the JavaFX API. See also help content optimization
• "helpContent": the optional file which specifies how the chapters in the help content will be created. See Help content configuration for more information
• "helpPageWidth": the page width used for specifying the images width for the help content^[1]
  Using a percentage width for images would not work for the help content, so the generator will compute the image width in this case by using this value for the overall "page width". The page width will be set by default to 600 if not specified

Note that setting the "resolveAPILinks" option can also be useful when generating the Help content. See Resolving API links.

Configuration example

Here we have a configuration example for the ant integration:

   <java classname="org.docgene.main.DocGenerator">
      <arg value="-input=wiki/input"/>
      <arg value="-output=wiki/output"/>
      <arg value="-outputType=help"/>
      <arg value="-helpContent=wiki/helpContent.xml"/>
      <classpath>
         <pathelement path="docGenerator.jar"/>
      </classpath>
   </java>

Help content optimization

By default the help content is optimized for the Swing API. However the content of the help articles would not be seen correctly using the JavaFX help API. The "helpOptimizedForSwing" property allows to specify how the help content will be encoded.

Note that the generated zip file contain a README.txt file which indicates for which format the Help content has been generated, and also if the content allows a full text search.

Content of the help zip file

Thz zip file which is the output of the help generation contain:

• The articles and resources of the wikii, to use in the integrated help component
• A database^[2]
  See The Help database schema
  which contain the list of articles, titles, and their relative paths to their files
• The files for the articles and resources
• README.txt file which indicates for which format the Help content has been generated, and also if the content allows a full text search

API usage

The generated help content can be used either for a Swing or JavaFX application. The help content will be presented in a component which can be integrated in any GUI^[3]

The Swing and the JavaFX APIs are very similar

. See:

• Help Swing API for using the Swing API
• Help JavaFX API for using the JavaFX API

Example with Swing

   // get the zip file as an URL
   URL url = ...

   try {
     // create the Help factory
     JavaHelpFactory factory = new JavaHelpFactory(url);
     factory.create();
     ArticlesModel model = factory.getModel();

     // create the viewer component
     SwingHelpContentViewer viewer = new SwingHelpContentViewer();
     viewer.installModel(model);

     JComponent pane = viewer.getComponent();
     // do whatever you want with the component
   } catch (IOException | SAXException ex) {
     ex.printStackTrace();
   }

Dependencies

The Help system does not have any other libraries dependencies, except if the full text search is set. In that case the elasticlunr.jar library must be in the same directory as the Help system jar file, or in the classpath of the library using it.

Help usage

The Help component^[4]

Both a Swing and a JavaFX implementations exist

allows to navigate between the wiki articles:

• The left panel shows a tree with all the article titles
• The right panel shows the content of the currently selected article
• The toolbar presents:
• A Home button allowing to go directly to the index article,
• Two buttons to navigate back or forward in the articles,
• A button to go to the glossary, if the wiki has a glossary,
• An auto-completion field to search for an article or title

Note that the external http web sites will be opened in the desktop browser. Also all the hyperlinks are active.

Example without a glossary:

Example with a glossary:

Checking the content of the Help archive

The docGeneHelpChecker.jar tool allows to check the content of a Help content archive. It checks that the XML database is valid, and that the articles which are referred exist.

Normally you don't need to check the content of the archive if it has been generated by the tool, but it can be useful to use it if you produced the content manually .