# Qt Command Line Documentation

qt5options

7

qt5options

Common commandline options for all applications based on the Qt toolkit

    Qt application

    -style= style / -style style
    -stylesheet= stylesheet / -stylesheet stylesheet
    -widgetcount
    -reverse
    -qmljsdebugger= port

    -platform platformName[:options]
    -platformpluginpath path
    -platformtheme platformTheme
    -plugin plugin
    -qwindowgeometry geometry
    -qwindowicon icon
    -qwindowtitle title
    -reverse
    -session session
    -display hostname:screen_number
    -geometry geometry
    -dialogs= [xp|none]
    -fontengine= freetype

    -h, --help and -? on Windows
    -v --version

## Options

The following options apply to all &Qt; applications:

`-style=` `style` / `-style` `style`

- Set the application GUI style. Possible values depend on the system configuration. If Qt is compiled with additional styles or has additional styles as plugins these will be available to the -style command line option.

`-stylesheet=` `stylesheet` / `-stylesheet` `stylesheet`

- Set the application styleSheet. The value must be a path to a file that contains the Style Sheet.

`-widgetcount`

- Print debug message at the end about number of widgets left undestroyed and maximum number of widgets existed at the same time.

`-reverse`

- Set the application's layout direction to `Qt::RightToLeft`. This option is intended to aid debugging and should not be used in production. The default value is automatically detected from the user's locale (see also `QLocale::textDirection()`).

`-qmljsdebugger=` `port`

- Activate the QML/JS debugger with a specified port. The value must be of format port:1234[,block], where block is optional and will make the application wait until a debugger connects to it.

`-platform` `platformName[:options]`

- Specify the Qt Platform Abstraction (QPA) plugin.

`-platformpluginpath` `path`

- Specify the path to platform plugins.

`-platformtheme` `platformTheme`

- Specify the platform theme.

`-plugin` `plugin`

- Specify additional plugins to load. The argument may appear multiple times.

`-qwindowgeometry` `geometry`

- Specify the window geometry for the main window using the X11-syntax. For example: -qwindowgeometry 100x100+50+50

`-qwindowicon` `icon`

- Set the default window icon.

`-qwindowtitle` `title`

- Set the title of the first window.

`-session` `session`

- Restore the application from an earlier session.

`-display` `hostname:screen_number`

- Switch displays on X11. Overrides the DISPLAY environment variable.

`-geometry` `geometry`

- Specify the window geometry for the main window on X11. For example: -geometry 100x100+50+50.

`-dialogs=` `[xp|none]`

- Only available for -platform windows. xp uses XP-style native dialogs and none disables them.

`-fontengine=` `freetype`

- Use the FreeType font engine.

`-h, --help and -? on Windows`

- Print all options and the application description.

`-v --version`

- Display the version string of the application.

## See Also

`kf5options`(7)

## Authors

Man page originally written by &Lauri.Watts; &Lauri.Watts.mail;

Updated to Frameworks 5 by &Burkhard.Lueck; &Burkhard.Lueck.mail;

The infos for this man page are from QApplication documentation, QGuiApplication documentation and QCommandLineParser documentation.