Ola Vicente,

1) It is not a male plant - all violets are bisexual.
Violets produce flowers with petals when the days are short - winter and spring. If your plant has had artificial light (even from a street light), it might think it is summer!
Also, a cold period helps promote flowering - so have you kept yours inside the house during winter? Violets should be kept outside (though you can bring them into the house for a short period when they are already in flower).
Lastly, has your plant had too much nitrogen-rich fertilizer or compost? That would give good leaves but it may also reduce the amount of flowers.

2) The colour of a violet's petals is not changed much by sunlight, execpt by scorching when water is on the petals (which can produce almost white areas). Viola odorata comes in many cultivars and natural forms with different coloured petals - white, pink, purple, cream, and many other colours between those.
Soil type/chemistry does not affect the petal colour much, as far as I know (you cannot change between pink and blue by putting iron nails in the soil, like with Hydrangea).

Hope this helps,
Mike

Hello Mike,

I had read your answer today. It´s a very good help.

Thanks. Vicente.

odoratas are better suited for outdoors, try African Violets as indoor culture. I have a patch of odoratas outside that really do benefit from the cold spells of winter, they also tend to be water hogs to look their best and most full. Mine are transplants from the neighbors garden and mixed with Forget Me Nots.