Hi,

The measurement tool inserts measurements into a special layer and if that 
layer is made selectable and editable it is possible to edit the geometries and 
all the areas, lengths, and segment lengths are updated in real time. It seems 
even to be possible to digitize a hole into a measurement polygon and perimeter 
grows while the area is degreasing. 

I wonder if this tool could be re-used for showing info about existing lines 
and polygons which are on normal layers. Usage could be like Select features - 
Right click - Show distances and areas. It could be implemented by copying the 
selected geometry into measument layer but it might also be fancy to be able to 
edit the features with the Show measures -option on.

-Jukka Rahkonen-

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