in the toolbar, use a combobox instead of zoom buttons

[kiddo]

(this is not for the "internal" gui or a touchscreen device gui)

the + and - magnifying glass buttons for zoom in/out, on the toolbar, are currently a bit inefficient because they don't provide the user with a sense of scale at all. I would suggest either finding a way to use a gtk scale, or, more simply, to use a gtk combobox. It could have values that indicate the zoom level. For example:

Values in percent, whereas 100% = 1:1 scaling (unlikely to happen, but still). So the values would be something like
5%
10%
15%
20%
25%
30%
35%
40%

Another way to put it is to use absolute units (km, meters...), but I am not sure this would be clearer/better, or that it would be feasible at all.

[KaZeR]

what would be better? displaying a scale on the map and keeping + & - or using this combo?

[kiddo]

personally, I would use the combobox because it supports the mouse wheel too? Isn't showing a scale on the map much more complicated?

[kazer]

The ​http://wiki.navit-project.org/index.php/On_Screen_Display#scale|scale has been added to the OSD features. The advantage is that it applies to all graphics drivers.