Distance between objects of a vector map

The given mode defines the shortest distance between two objects of a map and displays result in a messages line.

At the beginning of work the basic object gets out. Then by exhaustive search additional objects  to which one it is necessary to define the shortest distance are selected.

The distance is defined from an existing point of the basic object metrics up to a pseudo-point  (not existing) additional object.

For change of the basic object it is necessary to cancel its choice (a combination of key Ctrl and the right mouse button) and to choose a new one.