sf::View strange behaviour

[netrick]

My windows is 1300x690. When the view is default my "map" renders properly:
http://postimg.org/image/lryrfrhlh/full/

Now I want using view place my map at position (400, 0) with size (900 x 690).
So I use:

sf::View view = window.getView();
view.setViewport(sf::FloatRect(400.f/1300.f, 0, 900.f/1300.f, 1));
view.setSize(900, 690);
window.setView(view);
 

Now the map rendering position is moved by a few tiles (look there are no green tiles on the left):
http://postimg.org/image/s6xscfob9/

Is it something wrong here or it is how view works? If so, how can I use viewport without changing the rendering position of things?

After applying viewport at (400, 0), I want (0, 0) position when rendering be at (400, 0)... It seems quite logic to me. But it is at about (335, 0) or so, I don't understand it really.

[AlexAUT]

You have to adjust your center of the view because you make it smaller. Otherwise the left top corner wont be at (0|0)

sf::View view = window.getDefaultView();
view.setViewport(sf::FloatRect(400.f/1300.f, 0, 900.f/1300.f, 1));
view.setSize(900, 690);
view.setCenter(450, 345);
window.setView(view);
 

AlexAUT

[netrick]

Thank you, it's working now.