Scribble

Application intended as an alternative to the default scribble application on the Onyx Boox M92.

Design Goals

The application should behave similar to a paper notebook.

notebook consists of pages named by creation date and time
pages can be turned easily
one can use pen (black, different sizes) and eraser
pen, eraser and thinkness can be changed easily

Implementation Ideas

at the top of the page is a toolbar containing buttons to
- change pen thickness
- switch pen and eraser
- turn pages
file format used is Xournal

Compilation

Compiling for x86 in QtCreator:

Make sure that you installed the SDK to /opt/onyx, and compiled the SDK libraries from https://github.com/onyx-intl/booxsdk/ and installed them to /usr/local/lib. Because of some reasons, the x86 version also needs Qt DBUS, so you have to use qmake scribble.pro QT+=dbus and then make to compile. You can also use the script build_x86.sh.

Compiling for arm:

Make sure that you installed the SDK to /opt/onyx. Then simply use the script build_arm.sh.

Debugging on arm:

Optimally, gdbserver could be used (available in the toolchain), but I was not yet able to achieve a stable connection to the device. Another (less convenient) option is to use core dumps. Use this file to run scribble on the ebook reader:

#!/bin/sh
cd /media/flash
ulimit -c unlimited
./scribble

If the program crashes, a file named core is created. The cross gdb found in the toolchain can be used to analyze this file. Under QtCreator, use Settings->Toolchain to register the toolchain in /opt/freescale/... and then open the core file via Debug->Debug core file.