This first post has been totally rewritten given the subsequent feedback that it was impossible to understand.
Here is a pattern which explains to me how the fingers for violin or viola fall in relation to each other in any major key in any given position.
1. In any major scale in any given position where the fingers are arranged "space space space" on one string ("string 1"), the position of the fingers on the string below ("string 2") will be in a parallel position, except for the first finger, which will have moved up a semitone to touch the second finger, and will be arranged "touching, space, space".
2. The position of the fingers on the next string down ("string 3") will be totally parallel to those on string 2.
3. The position of the fingers on the next string down ("string 4") will be in a parallel position to those on string 3 except for the second finger, which will have moved up a semitone to touch the third finger, and will be arranged "space, touching, space".
4. The position of the fingers on the next string down ("string 5") will be totally parallel to those on string 4.
5. The position of the fingers on the next string down ("string 6") will be in a parallel position to those on string 5 except for the third finger, which will have moved up a semitone to touch the fourth finger, and will be arranged "space, space, touching".
6. The position of the fingers on the next string down ("string 7") will be totally parallel to those on string 6.
7. The position of the fingers on the next string down ("string 8") will be in a parallel position to those on string 7, except for the fourth finger, which will have moved up a semitone so that the fingers are arranged "space, space, space".
8. String 8 is in fact identical to string 1, apart from the whole hand being a semitone nearer the bridge. The above pattern therefore goes round and round in circles for ever.
By identifying where on the A or E string the tonic falls, and remembering that there is always a semitone beneath the tonic, and that the third and fourth notes of the major scale are always parallel to the seventh and eighth notes of of the scale on the string (or strings) below, it is possible to identify where in the above cycle a given key in a given position falls, and to understand how the fingers will fall in relation to each other accordingly.
This is not a substitute for also learning the names of the notes on the stave, and the names of the notes on the fingerboard ("the map of the fingerboard".)