execute_preferred_application

Launches the preferred application for the given category with the parameter in the specified working_directory.

Libxfce4ui currently supports the following categories: %"WebBrowser", %"MailReader", %"FileManager", %"TextEditor", %"TerminalEmulator", %"ImageViewer", %"AudioPlayer", and %"VideoPlayer". If you specify an invalid category here, the execution will fail at a later stage and the user will be presented with an error dialog.

Note that even if this method returns true there's no warranty that the preferred application for category was run successfully, because of the way the helper framework is implemented. But you can be sure that if the execution fails at a later stage, the library will popup an error dialog to inform the user that the execution failed.

Parameters:

category	the category of the preferred application to launch.
parameter	additional parameter to pass to the preferred application (i.e. an URL to pass to the preferred browser) or null to pass no parameter.
working_directory	path to the directory in which to execute the preferred application for category, or null to use the current working directory.
envp	child's environment, or null to inherit parent's.

Returns:

true on success, else false.