The matrix returned by the Canvas is the sum of all transformations to the point your view is being drawn. There's a single Canvas for all Views on screen.
On Tue, Aug 31, 2010 at 12:26 PM, Joao Luis <[email protected]> wrote: > Hi all. > > I might be completely off-base here, but I've spent the last two days > trying to figure this out and, without success, you're my only hope. > > What I'm doing is simple: > > * I have a canvas where I draw a circle with center on (10, 10), > with radius = 5; > > * Then, I obtain the canvas transformation matrix > > > Matrix m = canvas.getMatrix(); > > * And then I create a new rectangle, I map it using the matrix and I > use the canvas to draw it. > > > RectF ri = new RectF(5, 5, 15, 15); > > RectF rf = new RectF(); > > > > m.mapRect(rf, ri); > > > > canvas.drawRect(rf, p); > > My problem: basically, the rectangle is being drawn in a different > position along the Y-axis. > > I outputed the transformation matrix and, by default, it is translated > by zero in the X-axis and by 25.0 in the Y-axis. > > Please note that I made NO transformations, either translate, scale or > rotate. > > I am unable to understand why this is happening and how to avoid it. > > Any help will be appreciated. > > Thanks. > > --J > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Romain Guy Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
