Surely it's easy enough to make a 'refresh zoom extent' button that only
becomes active when at least one map object is selected?
All I'm saying is that the 'refresh zoom extent' button ('set to map canvas
extent') needs to be as prominent / easy to find as the Refresh button. I don't
think it's a programming issue.
-----Original Message-----
From: Ramon Andinach [mailto:cust...@westnet.com.au]
Sent: 16 May 2017 01:17 AM
To: Willem Coetzer
Cc: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] script to simplify 'Set to Map Canvas Extent'
A third (and probably better) example. Did you know that you can have more than
one map object on a composer?
For example, I’ve previously made a few maps were I needed an area enlarged as
an inset. So two map objects at wildly different scales, and therefore
different extents.
If there’s a single refresh extents button which map object would it apply to?
> On 15 May 2017, at 17:52, Ramon Andinach <cust...@westnet.com.au> wrote:
>
> Hi Willem,
>
> I can give you an example of where I really, really don’t want the extent to
> be updated with the refresh button.
>
> One of the things I use QGIS for requires making a series of maps using two
> or more of a set of layers.
> So I can have a composer set to a wide view to give a regional overview, and
> another composer set to a narrower more local view. I can then turn on one
> set of layers and generate maps at both scales with that set. After that I
> can change to set B, hit refresh to check it looks right (and I didn’t forget
> a layer) then have maps for set B straight up.
> (I keep different QGIS projects, with a similar set of composers for
> each project area I work in. Once I’ve got the map extents set, then I
> don’t have to meddle with the composers too much. You sound a lot like
> you’re expecting to people to recreate maps on the fly over and over
> again - this is really time consuming.)
>
> Another reason might be that you’ve got your composer set up and you zoom
> into somewhere on the map to check a detail, fix it and you want to see what
> it looks like on the map - but you don’t want to zoom back out.
>
> I really like that the extent for each composer is fixed - unless I
> choose to change it. It seems perfectly intuitive to me :)
>
>
>
> On a slight tangent, I notice that Christine did answer the question you
> asked.
> Did you mean to ask, “Is there a way to automate creating a map?"
> or,
> "Can I create a button that combines functions in the Composer window?"
> instead?
> In current QGIS, the composer is pretty isolated from the rest of the
> program, as it’s not possible to directly make changes to composers through
> scripts. This is a limitation of the libraries used in the composer. I know
> there’s been a major overhaul of the Composer in the upcoming QGIS 3 release,
> and I’m pretty sure this is one of the changes.
> I’m sure Nyall will correct me if I’m wrong.
>
> Ramon.
>
>
>> On 15 May 2017, at 16:00, Willem Coetzer <w.coet...@saiab.ac.za> wrote:
>>
>> I was amazed that QGIS doesn't have a button to simplify this critical
>> function. Thank you Christine, I do appreciate the response. I found a
>> script that makes a new composer and then zooms to the extent of the map
>> canvas in the new composer, but the script is not ideal (dependent on
>> objects that won't always be present e.g. the filename of the QGIS
>> template). Ideally one should be able to create a new button on a toolbar
>> and then simply associate the 'Set to Map Canvas Extent' function with the
>> button. If that is not possible I guess the next best thing would be a
>> python script that does the same i.e. zooms to the extent of the map in the
>> active composer.
>>
>> I teach basic GIS skills to non-technical people and without this simple
>> function it will be very hard to make any progress. Even the default
>> procedure is too complex for them to remember.
>>
>> I strongly suggest that QGIS developers look at this.
>>
>> I really expected the 'Refresh' button to refresh the zoom extent as well.
>> Why wouldn't a user want to refresh the zoom extent when refreshing the
>> display of layers? It doesn't make sense to me.
>>
>> If anyone can help with that script I'd be grateful.
>>
>>
>>
>> Somerset StreetWillem Coetzer
>> Grahamstown, 6139Biodiversity Information Manager Private Bag
>> 1015Tel:+27 46 603 5841 Grahamstown, 6140Fax:+27 46 622 2403 South
>> AfricaEmail:mailto:w.coet...@saiab.ac.za
>> http://www.saiab.ac.za/
>> Disclaimer: http://www.nrf.ac.za/email-legal-notice.php
>>
>> -----Original Message-----
>> From: Qgis-user [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf
>> Of qgis-user-requ...@lists.osgeo.org
>> Sent: 13 May 2017 09:00 PM
>> To: qgis-user@lists.osgeo.org
>> Subject: [Marketing Mail] Qgis-user Digest, Vol 135, Issue 17
>>
>> Send Qgis-user mailing list submissions to qgis-user@lists.osgeo.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> https://lists.osgeo.org/mailman/listinfo/qgis-user
>> or, via email, send a message with subject or body 'help' to
>> qgis-user-requ...@lists.osgeo.org
>>
>> You can reach the person managing the list at
>> qgis-user-ow...@lists.osgeo.org
>>
>> When replying, please edit your Subject line so it is more specific than
>> "Re: Contents of Qgis-user digest..."
>>
>>
>> Today's Topics:
>>
>> 1. refresh zoom extent in composer (Willem Coetzer) 2. Re: refresh
>> zoom extent in composer (Christine)
>>
>>
>> ---------------------------------------------------------------------
>> -
>>
>> Message: 1
>> Date: Sat, 13 May 2017 10:44:44 +0000
>> From: Willem Coetzer <w.coet...@saiab.ac.za>
>> To: "qgis-user@lists.osgeo.org" <qgis-user@lists.osgeo.org>
>> Subject: [Qgis-user] refresh zoom extent in composer
>> Message-ID:
>> <5f079d395252426b9a6f1f0d6af33499@ZAGRH01EX02.saiab.local>
>> Content-Type: text/plain; charset="utf-8"
>>
>> If the zoom extent in the view changes, is there a way to update the
>> composer to reflect the same extent or do you need to create a new composer?
>>
>> Thanks
>>
>>
>> [cid:image40e5f3.PNG@44bf3bf6.42823550]<http://www.saiab.ac.za/>
>>
>>
>>
>>
>> Somerset Street
>> Willem Coetzer
>>
>> Grahamstown, 6139 Biodiversity Information Manager
>> Private Bag 1015 Tel: +27 46 603 5841
>> Grahamstown, 6140 Fax: +27 46 622 2403
>> South Africa Email: w.coet...@saiab.ac.za<mailto:w.coet...@saiab.ac.za>
>> http://www.saiab.ac.za/<http://http://www.saiab.ac.za/>
>>
>>
>> Disclaimer:<http://www.nrf.ac.za/email-legal-notice.php>
>> http://www.nrf.ac.za/email-legal-notice.php
>>
>>
>> Please consider the environment before printing this message.
>> -------------- next part -------------- An HTML attachment was
>> scrubbed...
>> URL:
>> <http://lists.osgeo.org/pipermail/qgis-user/attachments/20170513/19d7
>> 20de/attachment-0001.html>
>> -------------- next part -------------- A non-text attachment was
>> scrubbed...
>> Name: image40e5f3.PNG
>> Type: image/png
>> Size: 33578 bytes
>> Desc: image40e5f3.PNG
>> URL:
>> <http://lists.osgeo.org/pipermail/qgis-user/attachments/20170513/19d7
>> 20de/attachment-0001.png>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Sat, 13 May 2017 06:42:50 -0700 (MST)
>> From: Christine <geo.gu...@web.de>
>> To: qgis-user@lists.osgeo.org
>> Subject: Re: [Qgis-user] refresh zoom extent in composer
>> Message-ID: <1494682970839-5320434.p...@n6.nabble.com>
>> Content-Type: text/plain; charset=us-ascii
>>
>> Willem Coetzer wrote
>>> If the zoom extent in the view changes, is there a way to update the
>>> composer to reflect the same extent or do you need to create a new
>>> composer?
>>
>> Dear Willem,
>> you don't need to create a new composer. Procedure may depend on your QGIS
>> version, in elder versions the window to select an item may be missing.
>>
>> First select the map item in the composer view (right column). In the item
>> properties tab (below) scroll to the extents section. There you can find the
>> two buttons "set to map canvas extent" and "view extent in map canvas".
>>
>> Click the first one to transfer your map window extent coordinates
>> (your
>> "view") to your composer map extents (your "composer"). That's what you
>> wanted to do as I understand it.
>>
>> With the second button you might do the reverse: transfer the composer map
>> extent coordinates (your "composer") to your map window (your "view").
>>
>> Regards, Christine
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://osgeo-org.1560.x6.nabble.com/refresh-zoom-extent-in-composer-t
>> p5320428p5320434.html Sent from the QGIS - User mailing list archive
>> at Nabble.com.
>>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>> ------------------------------
>>
>> End of Qgis-user Digest, Vol 135, Issue 17
>> ******************************************
>> _______________________________________________
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
> _______________________________________________
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
