Restore GUI functionality

[kilian]

Develop a graphical interface. Some components and a basic Qt interface library exist and should be integrated in the W2 package.

[kilian]

Some news in r7322: To allow for online update of histograms and other stuff, I implemented a callback feature.

The rt_data block contains an allocatable object called event_callback (abstract). The abstract type contains a procedure that would be called once after N events, where N is given by event_callback_interval. The callback procedure has access to the event object. To activate this, one has to extend the event_callback_t to a a concrete type which could, for instance, call a C function via its associated procedure. The object has to be injected via global%set_event_callback.

A concrete example is in the unit test commands_34, where the callback procedure executes analysis_write and thus prints the current analysis data once every N events. This should be useful for a GUI.

(Currently there is only one callback at a time; if this proves useful, the feature could be extended to multiple callbacks.)

What is not implemented is a means for providing the callback routine/object for WHIZARD from the outside. In the unit tests, this is hardcoded. Possibilities are a library routine, a commandline switch, or a libdl call. This depends on the actual application.

[cweiss]

Right now the GUI is located on bitbucket. It is basically functional and can be moved to the WHIZARD trunk for further development.

[cweiss]

The merge of the GUI with the trunk has been done. Unfortunately, a change in the java-script libraries caused it to not work anymore.

[Juergen Reuter]

What is the status of this after BACN's latest commit? Working again?

[Juergen Reuter]

Indeed, as confirmed today, the GUI is working again with the functionality at then of the internship of Augustinas Malinauskas.