This is the report of porting FWBuilder to the QT4 library.

Done at all:
1) AboutDialog_q.ui: form completelly ported; CREATED: FWBAboutDialog.h
2) FWObjectClipboard.h, .cpp: no work at most
3) ColorCheckViewItem.h, .cpp: I found that this module isn't used in the project so I didn't do anything with it.
4) definitions.h
5) platforms.h, .cpp
6) FWObjectPropertiesFactory.h, .cpp
7) FWBSettings.h, .cpp
8) listOfLibraries.h, .cpp
9) FWBTree.h, .cpp
10) utils.h, .cpp
11) utils_no_qt.h, .cpp
12) FWObjectDropArea.h, .cpp, .ui: not tested
13) ObjectTreeViewItem.h, .cpp
14) ObjectTreeView.h, .cpp
15) listOfLibraries.h, .cpp
16) upgradePredicate.h
17) ObjConflictResolutionDialog.h, .cpp, .ui
18) SimpleTextEditor.h, .cpp, .ui
19) SimpleTextView.h, .cpp, .ui
20) SimpleIntEditor.h, .cpp, .ui
21) inplaceComboBox.h, .cpp
22) ActionsDialog.h, .cpp, .ui
23) ColorLabelMenuItem.h, .cpp, .ui
24) findDialog.h, .cpp, .ui
25) FindObjectWidget.h, .cpp, .ui
26) RCSFileDialog.h, .cpp

Almost done:
1) FWBMainWindow.ui: form needs some attention in later porting but now it does work
2) RCS.h, .cpp: need some attention, may have problems with QProcess objects
3) DialogData.h, .cpp

In work:
1) FWWindow.h, .cpp: big part of code is commented.
2) main.cpp: some part of code is commented.
3) ObjectManipulator.h, .cpp, .ui: need to connect Object Editor.
4) RuleSetView.h, .cpp

Stopped files, files having problems:
1) FWObjectDrag.h, .cpp: problems with inheriting (QStoredDrag -> QMimeData, QDrag).
2) RCSFilePreview.h, .cpp, .ui: there is no such thing as file preview in Qt4 so I can't use these files for the RCSFileDialog dialog.