[Qgis-developer] Problems with Histogram tab in Raster properties

[Benoit de Cabissole]

 Hi Tim,

Just after upgrading to release 14390 the histogram function works like
a charm when I open *for the first time* the raster properties window.
Thank you!

But, if I close the raster property window while in the histogram tab
and try to re-open it, QGIS crashes!
In fact I cannot open any raster properties window after that without
having QGIS crash...
I've edited the 'row' value in the RasterLayerProperties in the registry
to set it to 1 (from 6) and I can again use QGIS normally.
So it seems that the raster properties window bombs out QGIS if it opens
in the histogram tab (row=6).

Can you reproduce this behaviour in Linux/Mac/Other win?

I'm on WindowsXP in OSGeo4W.

One comment: the stats are computed each time the histogram tab is
opened. For large raster it takes a long time to compute the histogram.
Would it be best to save the histogram somewhere and reuse it?

Cheers,
Benoit



On 17/10/2010 09:23, Tim Sutton wrote:
> Hi
>
> On Thu, Oct 14, 2010 at 9:51 AM, Benoit de Cabissole <benoit at exigesa.com> wrote:
>>  Hi,
>>
>> A) In release 14370 the histogram tab of the raster properties window
>> has a problem:
>> The histogram is not displayed the second time the 'histogram tab' is
>> clicked.
>> E.g.:
>> 1 - open the raster properties window
>> 2 - click on the histogram tab
>> 3 - histogram is computed and displayed
>> 4 - click on any other tab
>> 5 - click on the histogram tab again
>> 6 - blank screen!!
>>
>> On WinXP - OSGeo4W dev installation
>> Can someone replicate the problem?
>>
> This should be fixed now as of r14387.
>
> Regards
>
> Tim
>