2011/7/8 Heinrich Apfelmus
I want to hear! Just a description. :) You can also mention why you find it interesting etc.
Well I have an old program sitting around. Anyway, it's very simple : The GUI has - a window with a menu bar, 2 directory selects (source and dest directories), 1 file select ( the 'patch file'), 1 textview to write logging information, and a 'Convert' button to start. - an about window that opens from a 'About...' menuitem - A status bar. The convert button stats an action that scans all applicable files in a source directory, converts them and writes them in a destination directory. The conversion itself is irrelevant to the topic, in my case it consists in searching for patterns in the file and replacing them, according to a list of changes read from a file, the 'patch file'. The progression is logged in the textview: file processed, strings replaced. In the status bar, a percentage bar grows. Why do I find it interesting ? Most of the time I would do a program like the above with a command line interface only. GUI programming can be tedious. Would FRP offer a way to code such a simple, boring example in a fun way ? Also, FRP is often concerned with animations, but I'd really like to see if it works well for small utilities. I have an old source code I can share, using gtk2hs, imperative style (and also beginner-ugly style :) ). It's about 200 lines of codes and a glade file. It just compiled and ran fine here.