How can I do a resizing toolbar using glade 3?

Question

I want to do a resizing toolbar similar to the left hand bar in glade itself. I believe Gimp has something similar. An ascii art illustration below.

| A | B | C |
-------------
| D | E | F |

So that when the width of the column is reduced, it flows down to something like this

| A | B |
---------
| C | D |
---------
| E | F |

Answer 1

You're looking for GtkToolPalette.