[Qgis-user] Embed layers and groups

Sat Mar 11 02:04:29 PST 2017

2017-03-10 22:27 GMT+01:00 Laurence Béchet <bechet.laurence at gmail.com>:

> Hi
>
> What might be more worrisome is that these embedded layers can be edited
> in the 'child' project and modified .... another bug?
>
> I'm not sure this is a bug. I'd expect to be able to modify the data (e.g.
because the area i'm working on was not yet covered by the data). What you
embed is the way the layer is set in the master project (its rendering and
constraints).

However, recent QGIS have an option in Project Properties --> Identify
features to set read-only a layer in the project and avoid features
modification. Might be worth testing if this option is followed in the
child project. If not, this would be a bug imho

Harrissou

> Cheers
> Laurence
>
>
> On 11/03/2017 6:31 a.m., Régis Haubourg wrote:
>
> Hi guys,
> Paul Blottiere submitted a pull request to solve that issue here
> https://github.com/qgis/QGIS/pull/4247
>
> If it is doing the work and merged, that would deserve backporting to 2.18
> branch.
>
> And yes that issue deserves to be more advertised and also extended to a
> unlinked "copy" mode.
> Wiring it in browser would be a nice way to make it more known too.
>
> Side note: There is already a plugin called layers menu from project to
> build menu shortcuts to other's project layers. I can't live without it
> now, pushing that into core would be nice, if someone's willing to fund
> that, qgis devs would probably be happy to tackle that
>
>
>
> Le 10 mars 2017 3:19 PM, "Neumann, Andreas" <a.neumann at carto.net> a
> écrit :
>
>> Hi Harrissou,
>>
>> Thanks for tackling this in the documentation.
>>
>> Some remarks:
>>
>> - embedded layers are shown with "italic" labels in the layer tree to
>> distinguish them from regular layers.
>>
>> - all layer properties are "read only", not only styling and labeling,
>> but also any other properties, like field aliases, display values, actions,
>> etc. That's why the layer properties can't be shown to avoid that the user
>> changes stuff which can't be saved in the project.
>>
>> - if the master project uses an alternative rendering order (defined in
>> the layer order panel of the master project), the layer ordering in the
>> project where the layers are embedded can only be retained "en bloc" and
>> only if you embed the parent group and not individual layers
>>
>> It may even be that you'll have to also activate the alternative
>> rendering order in the client project if you want to retain, but I am not
>> 100% sure. I just remember that it gave me headaches with the layer
>> rendering order in the past, because it was a bit buggy. Should work well
>> meanwhile though.
>>
>> Andreas
>>
>> On 2017-03-10 12:05, DelazJ wrote:
>>
>> Hi,
>>
>> Actually it's not a new feature. Has been there since.... (available in
>> 1.8 documentation http://docs.qgis.org/1.8/en/do
>> cs/user_manual/introduction/general_tools.html#nesting-projects)
>> And as you can see, the documentation has neither been improved since.
>> Given your discussion I tried to put some highlights on the feature and
>> any review is welcome https://github.com/qgis/QGIS-D
>> ocumentation/issues/1748 I'm more a default style user than an embedded
>> layer one so if I miss some advantages in this feature please, let me know.
>>
>> Laurence, I didn't check if you had reported the issues yet, otherwise I
>> think removal of some items can be added:
>> - Layer menu --> Labeling
>> - when right-clicking an embedded layer --> Style.
>>
>> Given that the Layer Properties dialog is not availbale, there are some
>> actions like "Set Scale visibility of layer", "Set layer CRS", "Filter"
>> (that belong to the Properties --> General menu) that make me fail to
>> understand the real scope of an embedded layer. Are they supposed to be
>> grayed too or not? What kind of changes are really allowed on such a layer
>> or what is really kept from the "source" file?
>>
>> Thanks,
>> Harrissou
>>
>>
>> 2017-03-09 21:07 GMT+01:00 Laurence Béchet <bechet.laurence at gmail.com>:
>>
>>> Thanks Andrea. I'll create them.
>>> These are not big issues and easy to work around as a user.
>>>
>>> I agree with you this new embedded layers feature is awesome and for
>>> little mapping projects like Ark in the Park they are very useful as I have
>>> my layout already ready and just need to add what i want to plots: bird
>>> territories or past control results or ..... Also if something in the
>>> layout changes (new track, pest control grid altered) I only need to modify
>>> the 'master' map and it is propagated to all the other maps. Worth a try!
>>>
>>> Kind regards
>>> Laurence
>>> ARK IN THE PARK Volunteer Co-Ordinator
>>> Cascades Ranger Station
>>> Falls Road, Waitakere
>>> Phone:  (09) 810 7014
>>> www.arkinthepark.org.nz  www.forestandbird.org.nz
>>>
>>> On 9/03/2017 10:58 p.m., Neumann, Andreas wrote:
>>>
>>> Hi Laurence,
>>>
>>> I can confirm both issues.
>>>
>>> Embedded groups show empty (without the layers, only the groups are
>>> displayed) in QGIS 3 and they are stylable in the styling dock in 2.18 when
>>> they shouldn't be stylable.
>>>
>>> However, if your restyle embedded layers in the styling dock, they are,
>>> of course not saved back to the original layers. This would be dangerous
>>> and probably unwanted in most cases.
>>>
>>> The styling dock is fairly new and probably the devs where not aware
>>> about the embedded layers feature.
>>>
>>> Can you please issue bug reports for both issues?
>>>
>>> Embedded layers and groups are probably not used that much in the wild,
>>> but I find them incredibly useful. It is one of my favourite QGIS feature
>>> and saves you tons of work if you can re-use background layers from other
>>> projects, while still being able to identify these layers or snap to them.
>>>
>>> Unfortunately, many users and devs are not aware of this feature and it
>>> doesn't get much attention.
>>>
>>> Thanks,
>>>
>>> Andreas
>>>
>>> On 2017-03-08 22:10, Laurence Béchet wrote:
>>>
>>> Hi,
>>>
>>> I'm trying to use the embed layers and groups feature.
>>> I'm running on Windows8 pro 64bits.
>>> I have created a new project and I am loading a group of layers which
>>> are my background (streams, lakes, etc ..) in a main project.
>>>
>>> QGIS 2.18.4 QGIS code revision 59c1d21:
>>> I get the group loaded nicely. As expected, I cannot access the
>>> properties if I double click on the layer. However, if I have the layer
>>> styling panel open, I can change the style ... I have not checked what
>>> happens to the main project.  Question 1: Is this normal?
>>>
>>> QGIS version 2.99.0-Master QGIS code revision 5a543e4:
>>> The group appears in the layers panel but none of the layers are
>>> displayed. Question 2: Is this normal?
>>>
>>> Kind regards
>>> Laurence Bechet
>>>
>>> ARK IN THE PARK Volunteer Co-Ordinator
>>> Cascades Ranger Station
>>> Falls Road, Waitakere
>>> Phone:  (09) 810 7014
>>> www.arkinthepark.org.nz  www.forestandbird.org.nz
>>>
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