Roation Opinions

All:

I am working on a WPF prototype application. This application reads some
data from a database and renders a simple graph of nodes and connecting
lines. Users of the app should be able to rotate the graph about the origin.

Opinion: Do you think it's easier/better to render onto a control, e.g.,
Canvas and simply use a rotation transform on the element, or calculate the
rotation some other way?

Thanks,
John

Hi,

jpuopolo wrote:
> All:
>
> I am working on a WPF prototype application. This application reads some
> data from a database and renders a simple graph of nodes and connecting
> lines. Users of the app should be able to rotate the graph about the origin.
>
> Opinion: Do you think it's easier/better to render onto a control, e.g.,
> Canvas and simply use a rotation transform on the element, or calculate the
> rotation some other way?
>
> Thanks,
> John

I think that it's easier to render your control with 0 rotation, and to
let the WPF take care of the rotation by using a RotateTransform. That
makes your life much easier.

Note however that some content cannot be rotated, for example ActiveX
controls running embedded in the WPF framework.

HTH,
Laurent
--
Laurent Bugnion, GalaSoft
Software engineering: http://www.galasoft-LB.ch
Private/Malaysia: http://mypage.bluewin.ch/lbugnion
Support children in Calcutta: http://www.calcutta-espoir.ch

Hi,

jpuopolo wrote:
> All:
>
> I am working on a WPF prototype application. This application reads some
> data from a database and renders a simple graph of nodes and connecting
> lines. Users of the app should be able to rotate the graph about the origin.
>
> Opinion: Do you think it's easier/better to render onto a control, e.g.,
> Canvas and simply use a rotation transform on the element, or calculate the
> rotation some other way?
>
> Thanks,
> John

I think that it's easier to render your control with 0 rotation, and to
let the WPF take care of the rotation by using a RotateTransform. That
makes your life much easier.

Note however that some content cannot be rotated, for example ActiveX
controls running embedded in the WPF framework.

HTH,
Laurent
--
Laurent Bugnion, GalaSoft
Software engineering: http://www.galasoft-LB.ch
Private/Malaysia: http://mypage.bluewin.ch/lbugnion
Support children in Calcutta: http://www.calcutta-espoir.ch