toggle layers on and off directly from the GUI

[sanderd17]

If different layers could be toggled from inside the GUI, a user could e.g. select if he wants to see natural elements (like water, forest ...) or traffic signs (traffic lights, stop signs ...) or labels while he is navigating, without editing the navit.xml

This could be done by making a layout for each set of layers, but the number of layouts would grow exponentially compared to the number of layers, so that's not a good idea.

If you don't get my explanation, see the ​http://www.hentges.net/irclogs/%23navit/2011/January/20110127_navit.log#[20110127%2016:03:19 IRC logs] (due to techical reasons, there is a bracket missing at the end of the link, just add a ']' to the end)

[tegzed]

Hello,

Good idea! I just committed this functionality to svn (r4055). Please test it and close the ticket if it works correctly. Usage is the following:

<osd enabled="yes" type="button" x="0"  y="-175" command="toggle_layer(&quot;streets&quot;)" src="gui_display_48_48.png"  />

[mineque]

tested with example and works, closing