I searched for a solution using a Mouse on Keyboard, as has on Gnome (CTRL+*+NUM LOCK).
The LXDE dont have this option active on rc.xml, but you can do it!
This litte tutorial help you to put accessibility on your LXDE
Sorry my english! I speak brasilian portuguse!
Do it!
Open your rc.xml. On Linux Mint LXDE version, you will found on: /home/user/.config/openbox <- set for your user only.
Here, i'm configure for use CTRL+ALT+ Numerical PAD for my keyboard. When pressed togheter will be move the pointer.
First, install xwit and xdotool:
sudo apt-get install xwit xdotool
The xwit, will do the move pointer to position. I'm using only 5 pixels, but if you want mroe fast, adjust this for 25. 5 multiples are better to move the mouse.
The xdotool is a tool for action the click, and other if you like, as mouse whell. You can change and put other using the rc.xml markup.
This tool, will make the click and right click and midle click too. I think that this better than Gnome Option!
Important! This not have a big consumption of memory. It's very small to run, without lag.
Will be executed time by time! Best for old computers.
For detect the keys, if you dont know the names, use de xev on console/terminal. Will be detect the keys pressed on system.
If you need to understand the rc.xml markup, consult this: http://wiki.lxde.org/en/LXDE:Questions
In <keyboard> section, insert this lines above on </keyboard>:
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<!-- Controlando o MOUSE via LXDE com XWIT -->
<!-- Keybinding for MOUSE CONTROL RIGHT DOWN-->
<keybind key="C-A-KP_3">
<action name="Execute">
<command>xwit -root -rwarp 5 5</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL RIGHT UP-->
<keybind key="C-A-KP_9">
<action name="Execute">
<command>xwit -root -rwarp 5 -5</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL LEFT DOWN-->
<keybind key="C-A-KP_1">
<action name="Execute">
<command>xwit -root -rwarp -5 5</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL LEFT UP-->
<keybind key="C-A-KP_7">
<action name="Execute">
<command>xwit -root -rwarp -5 -5</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL LEFT-->
<keybind key="C-A-KP_4">
<action name="Execute">
<command>xwit -root -rwarp -5 0</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL RIGHT-->
<keybind key="C-A-KP_6">
<action name="Execute">
<command>xwit -root -rwarp 5 0</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL UP-->
<keybind key="C-A-KP_8">
<action name="Execute">
<command>xwit -root -rwarp 0 -5</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL DOWN-->
<keybind key="C-A-KP_2">
<action name="Execute">
<command>xwit -root -rwarp 0 5</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL DOWN FAST-->
<keybind key="S-C-A-KP_2">
<action name="Execute">
<command>xwit -root -rwarp 0 25</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL RIGHT CLICK-->
<keybind key="C-A-KP_0">
<action name="Execute">
<command>xdotool click 3</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL MIDLE CLICK-->
<keybind key="C-A-KP_Decimal">
<action name="Execute">
<command>xdotool click 2</command>
</action>
</keybind>
<!-- Keybinding for MOUSE CONTROL LEFT CLICK-->
<keybind key="C-A-KP_Enter">
<action name="Execute">
<command>xdotool click 1</command>
</action>
</keybind>
<!-- Fim seção CONROLE DO MOUSE COMUM -->
If this help you, comment in the souce:
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<!--
Adriano H. Hedler - LXDE Translation to Portuguese-BR Helper
Accessibility Option on LXDE
Brasil - Paraná - Curitiba
Site: www.templosite.com
-->