[KevinH]

I find it truly hard to believe there are more than 40 clips you use so often that you need icons for them given you can access them all if you open the Clips Window.

But either way, check out the clips related code in:
main.ui, MainWindow.cpp, and ClipsWindow.cpp, ClipEditorModel.cpp, ClipEditorTreeView.cpp, ClipEditor.cpp and their header files.

main.ui defines the toolbars, MainWindow.cpp controls the toolbars that are viewable, and builds the clips toolbars on the fly and connects their signals and slots. The others define the clip structure and how users create them, and access them, etc.

Have fun! That is what opensource is all about.