QGIS » QGIS Application

Hi,
I cannot reproduce this behaviour on both windows seven and linux with qgis 1.4/trunk. I used also data from various sources.

I see it with 1.5.0.

I can reproduce the bug:

Open qgis 1.5.0 trunk .
Add a shapefile in EPSG:3003 (I don't know if it is an epsg-related bug)
I zoom to a bigger detail (call this "working-extent" for semplicity).
Now if I add to canvas another shapefile (even the same shapefile 2 times)
The canvas go automatically to full-extent.
After add this second layer the "back" (or last-extent) button is disabled, so is impossible to return to the "working extent".
Of course if I start to zoom the back-button is usable, but is lost the "working-extent".

Perhaps is a bug related to epsg:3003 ?

Add another hint:
If I use the 1.0 version of qgis.
When add the second layer, the canvas go to the full-extent , but the back-button is enabled so is possible return immediately to the "working-extent".

Replying to [comment:1 lutra]:

Hi,
I cannot reproduce this behaviour on both windows seven and linux with qgis 1.4/trunk. I used also data from various sources.

Hi,

tested again under win Seven (ultimate 32 bit)/Linux with a 3003 dataset, and still not confirming the behaviour.

Can you test on another machine and/or send a sample dataset?

I tested it on winXP 32bit and on win7 ultimate 64bit.
I confirm the bug :(

I try even to change the international settings (in italy we use the , for decimal).
But both the case the bug is always.

I put the shapefile I'm using for this testing.

https://trac.osgeo.org/qgis/attachment/ticket/2597/esempio.zip

Replying to [comment:3 lutra]:

Hi,

tested again under win Seven (ultimate 32 bit)/Linux with a 3003 dataset, and still not confirming the behaviour.

Can you test on another machine and/or send a sample dataset?

Tested again with your data, still not reproducible. :( I guess we will need further feedback from other users.

Perhaps I did not understand, but I cannot confirm this misbehaviour.
Please aperi2007 test it again, if possible on a different machine, to see if we can close this.

Just tested with last version of qgis 1.5 trunk.

Yes, I confirm it.

I start qgis, uncheck the option
"by default new layers added should be displayed" (to avoid time lost to rendering big archives).
add a shapefile, and zoom to a big details on it. For example 1:2500.
After I load a new shapefile (incidentally is the same shapefile).
With this action the canvas change the visible extent settings it to the new extent (1:163.000)
So I lost the specific point where I'm working :( .
I think the new extent displayed is based on the merge of the two layers (incidentally are the same).

This is quite boring, but with older version of qgis I hovewer could use the "zoom last" button to return to the original extent where the canvas was before to add the new layer (the bigger details). And this was a work-around to avoid lost the location where I'm working.
Now qgis seem to reset the old-extent so the button "zoom last" is disable after added a new layer.
So I think this is very unusable.

The better choice is surely don't change the visible extent when adding a new layer, but if this is not possible a second choice is permit to use the "zoom last" button to return to the extent where I was working.

Replying to [comment:6 pcav]:

Perhaps I did not understand, but I cannot confirm this misbehaviour.
Please aperi2007 test it again, if possible on a different machine, to see if we can close this.

Is it still reproducible, at least on Windows?

If I have one layer in canvas and I add a new layer that has a different bounding box, the extent remains unaltered with QGIS on Fedora.