Customizing wacom events with Gimp 2.8 anyone?

[VinzC]

Hi again.

I've installed Gimp 2.8 and I wanted to use my tablet's buttons to control the size of a brush instead of using the mouse or keyboard. The online documentation I found is very cryptic about that but I still managed to guess a few things I needed to know (without being certain, of course).

My tablet is a Wacom bamboo fun pen & touch. It has four buttons to the left side. I've successfully disabled the touch pad (like I do with my laptop), detected what button codes my tablet generates (button ID 3, 8, 9 and 1 from top to bottom). Buttons 8 and 9 are the middle ones.

Now I just wonder how I should use the "Input Events" dialog boxes in Gimp (never done that before). For example, in the Edit > Preferences > Input Controllers > Main Keyboard dialog box there is a "Grab event" button. I can click on it, it remains pressed but nothing happens. Clicking it a second time makes it return to the non-pressed state. What's the use for that button?

There are only cursor keys combinations in that dialog (i.e. up, down, left, right keys, no pgup, no pgdown, no home, no end). All combinations I'd call "primary" are assigned, i.e. all simple combinations Alt+<key>, Ctrl+<key> and Shift+<key> are assigned, which makes 12 events. I'd have liked to add two events Super+Up and Super+Down to control a brush size and later assign those event to my tablet's buttons 8 and 9 (although I'm not even sure that's the way to go).

I've opened Gimp this morning and I'm still trying to figure that out, 10 hours later, while I was hoping I would draw at all today...

Any hint, guys and girls?

Thanks in advance.
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