I’m a big fan of undo, and use it a lot.  Unfortunately I did not notice the 
reason in this case until too late.  I got to the end of the undo stack before 
the problem was resolved.

I think that the reason I did not take sufficient notice is that although the 
zoom behaviour was not quite right, I was sure I had not rolled the mouse 
wheel.  Hence I though I’d stumbled on a variant of the bug, and so put up with 
it for too long before trying to back out.  

For me rolling the mouse wheel to zoom is such a reflex (almost every 
application uses it) that I do it without realising.  One option, short of 
fixing the bug, would be to have the zoom level display on the menu bar between 
the + and – controls.  That would give the user a cue to an imminent problem.  
The notification in the Drawing Area side menu is buried too deep for the user 
to review constantly.

 

Bruce

 

From: Therion <[email protected]> On Behalf Of Martin Sluka via Therion
Sent: Monday, 19 March 2018 10:11 PM
To: List for Therion users <[email protected]>
Cc: Martin Sluka <[email protected]>
Subject: Re: [Therion] Scaling problems with backgrounds in th2 files - XTherion

 

The same problem. I used undo button to return to the correct state.

 

Martin S.

 

 

 

 

19. 3. 2018 v 9:44, Bruce Mutton via Therion <[email protected] 
<mailto:[email protected]> >:

 

Today I made a new .th2 drawing file and used a .png file as a background 
image.  Not something I do very much these days, as I typically use .xvi files 
created PocketTopo files.  The xvi images work just fine in XTherion.

 

But as described in the post in this link,  
<https://www.mail-archive.com/[email protected]/msg06890.html> 
https://www.mail-archive.com/[email protected]/msg06890.html, there are 
problems when using the mouse wheel to zoom if background images are .jpg or 
.png.  Until now I have adopted a work around of only using the menu + and – 
zoom buttons where th2 files are linked to these.

 

However for one projected elevation drawing, even the + and – controls are 
problematic.  I think I accidentally used the mouse wheel before inserting the 
image.  As a result the image is only aligned with the sketch at one particular 
zoom level.  144% in this case.  There is also a problem with the image 
clipping.

<image001.png>

 

In the above example, if I zoom out one level, the drawing reduces, but the 
image does not change by the same amount.

<image002.png>

 

If I use the zoom wheel, the situation compounds and gets worse.  So I have a 
situation where I can only align this drawing at one zoom level, and I have to 
be careful not to use the mouse wheel.

Not really a problem in this case, as it is a trivial survey and scrap, but it 
is a significant issue for anyone who might still be regularly using scanned 
sketches for drawing.

 

Is this something that someone knows how to address?

 

I’m using Therion 5.4.1+f0c98ce (2018-03-03)

 

Bruce

 

 

 

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