- Qt 5.15
- QDoc Manual
- Creating QDoc Configuration Files
- Qt 5.15.18 Reference Documentation

Installing Clang for QDoc ◦ Writing Documentation

# Creating QDoc Configuration Files

To generate documentation, QDoc uses configuration files, with the `qdocconf` extension, to store configuration settings.

The The QDoc Configuration File article covers the various configuration variables in greater detail.

## QDoc Configuration Files

QDoc's configuration settings can reside in a single qdocconf file, but can also be in other qdocconf files. The `include(<filepath>)` command allows configuration files to include other configuration files.

QDoc has two outputs, HTML documentation and documentation in DITA XML format. The main distinction between the two outputs is that HTML documentation needs to have its HTML styling information in the configuration files. DITA XML documentation does not, and a separate process can style the documentation in DITA at a later time. DITA XML is therefore more flexible in allowing different styles to apply to the same information.

To run QDoc, the project configuration file is supplied as an argument.

     qdoc project.qdocconf

The project configuration contains information that QDoc uses to create the documentation.

### Project Information

QDoc uses the `project` information to generate the documentation.

     project = QDoc Project
     description = Sample QDoc project

### Input and Output Directories

Specifying the path to the source directories allow QDoc to find sources and generate documentation.

     sourcedirs = <path to source code>
     exampledirs = <path to examples directory>
     imagedirs = <path to image directory>

     sources.fileextensions = "*.cpp *.qdoc *.mm *.qml"
     headers.fileextensions = "*.h *.ch *.h++ *.hh *.hpp *.hxx"
     examples.fileextensions = "*.cpp *.h *.js *.xq *.svg *.xml *.ui *.qhp *.qhcp *.qml"
     examples.imageextensions = "*.png *.jpeg *.jpg *.gif *.mng"

QDoc will process headers and sources from the ones specified in the `fileextensions` variable.

Likewise, QDoc needs the path to the output directory. The `outputformats` variable determines the type of documentation. These variables should be in separate configuration files to modularize the documentation build.

     outputdir  =    $SAMPLE_PROJECT/doc/html
     outputformats = HTML

QDoc can resolve the paths relative to the qdocconf file as well as environment variables.

Note: During each QDoc run, the output directory is deleted.

### Extra Files

QDoc will output generated documentation into the directory specified in the output directory. It is also possible to specify extra files that QDoc should export.

     HTML.extraimages = extraImage.png \
                        extraImage2.png

The `extraImage.png` and the `extraImage2.png` files will be copied to the HTML output directory.

### Qt Help Framework Configuration

QDoc will also export a Qt Help Project file, in a `qhp` file. The qhp file is then used by the `qhelpgenerator` to package the documentation into a `qch` file. Qt Creator and Qt Assistant reads the qch file to display the documentation.

The Creating Help Project Files article covers the configuration options.

### HTML Configuration

QDoc has an HTML generator that will export a set of documentation into HTML files using various configuration settings. QDoc will place the generated documentation into the directory specified by the `outputdir` variable.

     outputformats = HTML
     outputdir =  <path to output directory>

QDoc needs to know where the styles and templates for generating HTML are located. Typically, the templates directory contains a `scripts`, `images`, and a `style` directory, containing scripts and CSS files.

The main configuration variables are:

     HTML.postheader
     HTML.postpostheader
     HTML.postheader
     HTML.footer

     HTML.headerstyles
     HTML.stylesheets = template/style/style.css \
                        template/style/style1.css

     HTML.scripts = template/scripts/script.js

The `HTML.headerstyles` variable inserts the style information into the HTML file and the `HTML.stylesheets` specifies which files QDoc should copy into the output directory. As well, QDoc will embed the string in the `postheader`, `footer`, and related variables into each HTML file.

The Format-specific Configuration Variables article outlines the usage of each variable.

### QDoc Index Files

Documentation projects can link to targets in other projects by specifying a set of dependencies, or a set of direct paths to to index file(s) this project depends on. When QDoc generates documentation for a project, it will also generate an `.index` file containing URLs to each linkable entity in the project. Other projects can then define a dependency to the index file in order to link to the documentation within that project.

See also: depends and indexes.

## Macros and Other Configurations

Macros for substituting HTML characters exist and are helpful for generating specific HTML-valid characters.

     macro.pi.HTML         = "&Pi;"

The snippet code will replace any instances of `\\pi` with `&Pi`; in the HTML file, which will appear as the Greek Π symbol when viewed in browsers.

See also: macro.

### QML Additions

QDoc is able to parse QML files for QDoc comments. QDoc will parse files with the QML extension, `.qml`, if the extension type is included in the fileextensions variable.

Also, the generated HTML files can have a prefix and a suffix following the QML module name, specified in the QDoc configuration file.

     outputprefixes = QML
     outputprefixes.QML = uicomponents-
     outputsuffixes = QML
     outputsuffixes.QML = -tp

See also: outputprefixes, outputsuffixes.