[Kst] extragear/graphics/kst/kst

Ted Kisner tskisner.public at gmail.com
Tue Nov 1 23:43:12 CET 2005


after further inspection, it seems that I just need to ensure that the 
KstImage doesn't try to access the matrix until it is loaded at the end of 
kstdoc.cpp.

I'll revert the previous change and fix KstImage.

-Ted

On Tuesday 01 November 2005 14:34, Ted Kisner wrote:
> ok, I admit I'm just learning the details here...  Basically the way it
> currently works is that KstImage just parses the dom, and adds the name of
> the matrix to the inputMatrixLoadQueue value list.  It does not actually
> add the matrix pointer to _inputMatrices.  When the KstImage::update method
> is called, it tries to access a null pointer with KstMatrix::minX();
>
> In the other constructors, this is a non-issue, since the KstImage gets
> passed a pointer to the desired matrix.
>
> So when is the proper time to load a matrix into the _inputMatrices of the
> Image?  It has to happen before KstImage::update- or we need to change
> KstImage to just not do anything if it doesn't have a valid matrix pointer
> (but we still need to load it eventually).
>
> -Ted
>
> On Tuesday 01 November 2005 14:14, George Staikos wrote:
> > On Tuesday 01 November 2005 16:45, Ted Kisner wrote:
> > > SVN commit 476732 by tskisner:
> > >
> > > When loading an image from a kst file, it will crash unless we actually
> > > load the matrix into _inputMatrices when parsing the Dom.  This fixes
> > > the problems I was having when saving a healpix image (or simply trying
> > > to save/load the example asciimatrix.txt image)
> > >
> > >    _inputMatrixLoadQueue.append(qMakePair(THEMATRIX, in_matrixName));
> > > +  KstDataObject::loadInputs();
> >
> >   Maybe I'm misunderstanding, but I think this will cause crashes or
> > inconsistencies too.  loadInputs() is supposed to be called only after
> > all the objects are constructed because the kst file may be out-of-order.
> >  I think this patch is wrong and somewhat defeats the whole purpose of
> > loadInputs().  Maybe there is another approach?
>
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