<div dir="ltr">What about a icon in the legend to note that it it's not going to be saved?<div><br></div><div>- Nathan</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Sep 25, 2014 at 3:57 PM, Mathieu Pellerin <span dir="ltr"><<a href="mailto:nirvn.asia@gmail.com" target="_blank">nirvn.asia@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir="ltr">Thoughts:<br>
- I don't think warning should be occurring when creating a memory layer (that is when pasting as new layer, when adding the result of a processing algorithm as memory layer, or creating a blank memory layer)<br>
- I don't think the user should be able to disable the warning message (which imo should be a dialog with saving shortcuts), the resulting data loss is too critical; it's like opening a project with missing layers, qgis doesn't (and shouldn't) allow for this dialog to be skipped<br>
- IMO best to have: a/ a message bar when saving project while in an ongoing session, and a missing layer-like warning dialog when closing project</p><div class="HOEnZb"><div class="h5">
<div class="gmail_quote">On 25 Sep 2014 12:15, "Denis Rouzaud" <<a href="mailto:denis.rouzaud@gmail.com" target="_blank">denis.rouzaud@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<br>
<div>On 25.09.2014 04:02, Mathieu Pellerin
wrote:<br>
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<div>
<div>Regarding the saving aspect of it, IMO it needs to
be worked out. I've had a couple of users over here
already reporting "data loss" with the following
scenario:<br>
</div>
1. Open his/her project<br>
2. Copies one polygon from a large dataset and pastes is
as a new memory layer (very useful feature introduced in
QGIS 2.x)<br>
</div>
3. Styles the memory layer, and saves the project<br>
</div>
4. The next day, when he/she re-opens the project, the
polygon is gone<br>
<br>
</div>
Throughout the above mentioned workflow, there was never _any_
indication that the pasted memory layer would not be saved
when saving the project. <br>
<br>
</div>
If QGIS further ease access to memory layers via incorporating
the new memory layer function into the core (which I hope its
done :) ), and decide against saving across project session,
then there must be a UX to deal with that, instead of silently
killing the data of the memory layer(s). One way forward would
be to have a warning upon closing a project that has
non-saveable memory layers to warn the users. That warning
should offer for users to save the memory layers onto a proper
format (possibly like the missing layer dialog, with a list of
all the memory layers and an input to add the saved file
location/name). <br>
</div>
</blockquote>
I would be in favor of a warning when first create a memory layer.
The warning would say you can't save them except from using a
plugin. And, there would be a checkbox "do not display this warning
anymore".<br>
<br>
<br>
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<div>Math<br>
</div>
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<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Sep 25, 2014 at 4:07 AM, Martin
Dobias <span dir="ltr"><<a href="mailto:wonder.sk@gmail.com" target="_blank">wonder.sk@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Nyall<br>
<span><br>
On Thu, Sep 25, 2014 at 3:31 AM, Nyall Dawson <<a href="mailto:nyall.dawson@gmail.com" target="_blank">nyall.dawson@gmail.com</a>>
wrote:<br>
> Hi all,<br>
><br>
> The recent discussion around memory layers in another
thread has started me<br>
> thinking about the best way to expose them more
readily to users.<br>
><br>
> As such, I've opened a pull request which ports Borys
Jurgiel's "New Memory<br>
> Layer" plugin to core (PR #1591). Hopefully this can
be merged for 2.6. It's<br>
> more or less a direct port - I've left it without the
ability to specify<br>
> fields at creation time as I believe that field
creation would indicate that<br>
> we are encouraging users to store real data in these
layers, which is<br>
> something we should avoid.<br>
<br>
</span>Cool - from time to time it is handy to make a memory
layer for some<br>
temporary data and having to use a plugin / python console
for the<br>
creation is suboptimal...<br>
<span><br>
> What I'm thinking though is that we should rename
"memory layers" within the<br>
> UI. The name suggests that they are remembered, and
conveys more of a<br>
> permanent feel.<br>
><br>
> I think that for 2.6 we could rename them to
"temporary scratch layers", and<br>
> then for >2.6 (after we port the memory layer
saving plugin/decide on a<br>
> suitable format for saving them) drop the "
temporary" part of this name. So<br>
> they'll be just "scratch layers".<br>
<br>
</span>I like the name "scratch layer" - and I wouldn't mind
having it from<br>
2.6 even without the "temporary" part although there is no
saving for<br>
it. (Saving is still a bit controversial for me as we would<br>
inadvertently create another vector file format - unless we
would ask<br>
user to save the layer data into one of OGR supported
formats or<br>
spatialite DB.)<br>
<br>
Cheers<br>
Martin<br>
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