Hi Jens,
On Tue, 12 Feb 2013 11:59:59 +0000
Bache-Wiig Jens <jens.bache-w...@digia.com> wrote:
[snip]
> Hi Mark.
>
> There is indeed a mistake in this example. You can think of Canvas as an
> Image Item that you paint on and the coordinates you specify in the
> paint function are local to that Image. Things that are painted outside
> of the Canvas rectangle will be clipped away and discarded.
>
> In other words you should not use the x and y properties in the Canvas
> paint function itself since they will be used as the offset of the Image
> element resulting from the Canvas paint function. Each Triangle must be
> painted by itself with the origin starting at 0,0. To make it work you
> can simply redefine your paint function like this:
>
> // Triangle.qml
> import QtQuick 2.0
> Canvas {
> id: triangle
> antialiasing: true
> property color color: "white"
> onPaint: {
> var ctx = getContext("2d");
> ctx.save();
> ctx.fillStyle = color;
> ctx.moveTo(width / 2, 0);
> ctx.lineTo(width, height);
> ctx.lineTo(0, height);
> ctx.closePath();
> ctx.fill();
> ctx.restore();
> }
> }
>
> And it should work fine.
Yes, it does. Thanks for spotting my silly mistake:-)
--
Mark Summerfield, Qtrac Ltd, www.qtrac.eu
C++, Python, Qt, PyQt - training and consultancy
"Programming in Go" - ISBN 0321774639
http://www.qtrac.eu/gobook.html
_______________________________________________
Interest mailing list
Interest@qt-project.org
http://lists.qt-project.org/mailman/listinfo/interest
