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Re: [nebula-dev] computeSize in Control
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trying to put the GeoMap into a scrollview based on its returned size is something that i don't really recommend. the world we are rendering is too big, to be put into reasonably sized scrollbars.
regards,
stepan
-------- Original-Nachricht --------
> Datum: Thu, 10 May 2012 09:33:08 -0600
> Von: Matthew Hall <qualidafial@xxxxxxxxx>
> An: Nebula Dev <nebula-dev@xxxxxxxxxxx>
> Betreff: Re: [nebula-dev] computeSize in Control
> The computeSize method should report the minimum size needed by the
> control. Expanding the control to fill available space is the
> responsibility of the container control, using layout data hints.
>
> -Matthew
> On May 10, 2012 8:25 AM, "Hallvard Trætteberg" <hal@xxxxxxxxxxx> wrote:
>
> > Hi,
> >
> > I have been looking at implementing computeSize in GeoMap, so it "grabs"
> > more space than the minimum when there are no constraints. I test it by
> > creating an anonymous subclass in GeoMapViewer's constructor. First I
> tried
> >
> > public GeoMapViewer(Composite parent, int flags) {
> > this(new GeoMap(parent, flags) {
> > @Override
> > public Point computeSize(int wHint, int hHint,
> > boolean changed) {
> > int w = (wHint != SWT.DEFAULT ? wHint :
> > Integer.MAX_VALUE);
> > int h = (hHint != SWT.DEFAULT ? hHint :
> > Integer.MAX_VALUE);
> > return new Point(w, h);
> > }
> > });
> > }
> >
> > The idea is to indicate that ideally GeoMap wants as much space as
> > possible. I was pretty surprised that the wish for Integer.MAX_VALUE
> width
> > and height was granted, in the sense that getSize() reported these
> > dimensions not that the layout actually gave it that much space. This
> gave
> > problems in the paint method, so I reduced the value from
> Integer.MAX_VALUE
> > to 256 * 8.
> >
> > Two question:
> > - (how) can the computeSize method say that it wants as much as
> possible,
> > but can accept nothing?
> > - why isn't the size returned by getSize() actually reduced to the
> visible
> > size instead of the value asked for by computeSize?
> >
> > Hallvard
> > ______________________________**_________________
> > nebula-dev mailing list
> > nebula-dev@xxxxxxxxxxx
> >
> https://dev.eclipse.org/**mailman/listinfo/nebula-dev<https://dev.eclipse.org/mailman/listinfo/nebula-dev>
> >
--
Stepan Rutz
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