Re: [java-gnome-hackers] org.gnome.gdk.EventButton.getX()/getY(): double vs int

[Stefan P. <st...@pr...>]

Hi,

Am Montag, den 06.10.2008, 15:33 -0400 schrieb Gerald Butler:
> Is it possible to have fractional mouse locations reported under
> various coordinate transformation matrixes? Perhaps when things like
> "Multi-Touch" become wide-spread? What does the underlying GTK API
> have to say about this?

Nearly nothing.

gdouble x; the x coordinate of the pointer relative to the window.

is all I can find in the API docs for that type. 

Regarding transformation: The only way that I can imagine coordinate
transformation leading to non-integer values is for example when a kind
of magnifying glass follows the mouse cursor so that the screen pixels
may not match application pixels. (Just a quick thought - might prove
false when you think closer about it.) But even dropping the fractional
part or rounding it seems ok.

Plus: We avoid confusion for application developers.

Cheers,
  Stefan