HACKING: improve documentation

README.md

@@ -28,4 +28,4 @@ cabal install
 Contributing
 ------------
 
-See [HACKING.md](HACKING.md).
+See [HACKING.md](hacking/HACKING.md).

hacking/HACKING.md

@@ -1,6 +1,9 @@
 HACKING
 =======
 
+Check out the [issue tracker](https://github.com/hasufell/hsfm/issues)
+if you don't know yet what you want to hack on.
+
 Coding style
 ------------
 
@@ -8,6 +11,7 @@ Coding style
 - no overcomplicated pointfree style
 - normal indenting 2 whitespaces
 - just make things pretty and readable
+- use the provided [hsimport.hs](hacking/hsimport.hs)
 
 Documentation
 -------------
@@ -17,13 +21,33 @@ __Everything__ must be documented. :)
 Hacking Guide
 -------------
 
-The main data structure is in [DirTree.hs](src/Data/DirTree.hs), which
-should be seen as a library. This is then mapped into the Gtk+ GUI at
-[Gtk.hs](src/GUI/Gtk.hs) and [Utils.hs](src/GUI/Gtk/Utils.hs).
+The main data structure for the IO related File type is in
+[HSFM.FileSystem.FileType](src/HSFM/FileSystem/FileType.hs), which
+should be seen as a library. This is the entry point where
+directory contents are read and the File type in general is constructed.
+The File type uses a safe Path type under the hood instead of Strings,
+utilizing the [hpath](https://github.com/hasufell/hpath) library.
 
 File operations (like copy, delete etc) are defined at
-[File.hs](src/IO/File.hs).
+[HSFM.FileSystem.FileOperation](src/HSFM/FileSystem/FileOperations.hs)
+which use this File type.
+
+Only a GTK GUI is currently implemented, the entry point being
+[HSFM.GUI.Gtk](src/HSFM/GUI/Gtk.hs). From there it flows down
+to creating a [MyGUI object](src/HSFM/GUI/Gtk/Data.hs#L51) in
+[HSFM.GUI.Gtk.MyGUI](src/HSFM/GUI/Gtk/MyGUI.hs), which is sort of
+a global object for the whole window. Inside this object are
+theoretically multiple [MyView objects](src/HSFM/GUI/Gtk/Data.hs#L101)
+allowed which represent the actual view on the filesystem and related
+widgets, which are constructed in
+[HSFM.GUI.Gtk.MyView](src/HSFM/GUI/Gtk/MyView.hs). Both MyGUI and MyView
+are more or less accessible throughout the whole GTK callstack, expclicitly
+passed as parameters.
+
+For adding new GTK widgets with functionality you mostly have to touch the
+following files:
+* [builder.xml](data/Gtk/builder.xml): this defines the main GUI widgets which are static, use the [glade editor](http://glade.gnome.org) to add stuff
+* [HSFM.GUI.Gtk.Data](src/HSFM/GUI/Gtk/Data.hs): add the widget to e.g. the MyGUI type so we can access it throughout the GTK call stack
+* [HSFM.GUI.Gtk.MyGUI](src/HSFM/GUI/Gtk/MyGUI.hs): add initializers for the GUI buttons to be fetched from the GTK builder.xml file
+* [HSFM.GUI.Gtk.Callbacks](src/HSFM/GUI/Gtk/Callbacks.hs): define the callbacks and the actual functionality here
 
-Note that the main data structures are still a bit in flux. Join
-[the discussion](https://github.com/hasufell/hsfm/issues/12) on how to
-improve them.