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resize policy [message #640382]

Sun, 21 November 2010 11:36

Henrik Rentz-Reichert

Messages: 261
Registered: July 2009

Senior Member

Hi,

I have a (rectangular) shape containing (rectangular) child shapes.

I would like to implement the following resize policy:

If I use the bottom right handle I can move the handle not farther left
than the rightmost child corner and not farther up than the bottommost
child corner.
The child shapes will keep their old (relative and absolute) position.

If I use the upper left handle I can move the handle not farther right
than the leftmost child corner and not farther down than the topmost
child corner.
The child shapes will keep their old *absolute* position but the
relative position should change.

It should be obvious how the 6 other resize handles should be treated.

Can the ResizeFeature distinguish those situations?
How can the LayoutFeature determine whether relative positions have to
be adjusted?

Thanks,
Henrik

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Re: resize policy [message #641629 is a reply to message #640382]

Fri, 26 November 2010 11:50

Michael Wenz

Messages: 1931
Registered: July 2009
Location: Walldorf, Germany

Senior Member

Hi Henrik,

this should be possible by comparing the new x- and y-coordinates with the
old coordinates from the root GA on the diagram. If they differ the upper
left corner has been moved (or if only one of the values changed one of the
other upper or left handles was used).

Nevertheless, I didn't try to implement something like that and the details
might be nasty... Please let me know if that works.

Michael

"Henrik Rentz-Reichert" <hrr@protos.de> wrote in message
news:icavvv$ap3$1@news.eclipse.org...
> Hi,
>
> I have a (rectangular) shape containing (rectangular) child shapes.
>
> I would like to implement the following resize policy:
>
> If I use the bottom right handle I can move the handle not farther left
> than the rightmost child corner and not farther up than the bottommost
> child corner.
> The child shapes will keep their old (relative and absolute) position.
>
> If I use the upper left handle I can move the handle not farther right
> than the leftmost child corner and not farther down than the topmost
> child corner.
> The child shapes will keep their old *absolute* position but the
> relative position should change.
>
> It should be obvious how the 6 other resize handles should be treated.
>
>
> Can the ResizeFeature distinguish those situations?
> How can the LayoutFeature determine whether relative positions have to
> be adjusted?
>
> Thanks,
> Henrik

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