[Therion] XtTherion canvas zoom with the mouse wheel bug

[torstein finnesand]

I have the same problem, in both 5.4.0 and 5.4.1 I think.

Thanks, Bruce, for a god description.

Torstein Finnesand
Norway


Den 21.06.2017 10.40, skrev Bruce Mutton via Therion:
>
> Hello
>
> I have an old paper survey, so am doing some old school map drawing 
> over a scanned background sketch. My first for a few years.
>
> I have noticed that XTherion seems to not be able to display the 
> background sketch once you have used the mouse wheel to zoom.  The 
> sketch just vanishes, even though everything looks OK.
>
> Using the magic of version control I can see that the only significant 
> change that XTherion makes to the dataset is that the ##XTHERION## 
> variable is no longer one of the present values.
>
> ie 100 has changed to 62 in response to the mouse wheel zoom.
>
> There are no problems if I use xvi file sketches as generated from 
> PocketTopo, so it is just a bitmap thing I suppose.
>
> If I manually change the value above back to 100, the image displays 
> just fine.
>
> The + -  zoom button on the interface work just fine as well.
>
> I am using 5.4.1 - 88c8a06
>
> Mouse wheel zoom is a nice feature, so it would be worth finding a fix 
> for this.
>
> Bruce
>
>
>
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