How to change key bindings

Thought there's no fancy key binding tools available on Mac yet, it doesn't mean you cannot change the key bindings yourself.

Editing keyboard configuration file

FlightGear has a keyboard configuration file at /Applications/FlightGear.app/Contents/Resources/data/keyboard.xml. Don't forget to backup the file before you get started.

The basic structure of a key binding

 1: <key n="1">
 2: <name>Ctrl-A</name>
 3:  <desc>Toggle autopilot altitude lock.</desc>
 4:  <binding>
 5:  <command>nasal</command>
 6:  <script>
 7:    node = props.globals.getNode("/autopilot/locks/altitude", 1);
 8:    if ( node.getValue() == "altitude-hold" ) {
 9:      node.setValue( "" );
10:    } else {
11:      node.setValue( "altitude-hold" );
12:    }
13:  </script>
14: </binding>
15: </key>

1. index
2. name of key in format of '[Modifier-]<key>' (e.g. Ctrl-A, a, G, ESC) - Key name is case sensitive
3. description
4-14. command that is bound to a key - DO NOT EDIT

Modifiers

There are two modifiers described in xml file.

1. <mod-up>
   mod-up describes a command when a key is released.
2. <mod-shift>
   mod-shift describes a command when a shift is pressed