<div dir="ltr"><div><div>Hi,<br></div>I do understand nothing.<br></div><div>After I read your message, Matthias, I told myself that using QT. QueuedConnection should be the easiest way. Then i wrote <br>self.iface.composerWillBeRemoved.connect(self.refreshList, Qt.QueuedConnection)<br>But each time i delete a composer, QGIS crashes.<br></div><div>So I've spent the week on reading about Qt.QueuedConnection and then signal and slots, function partial, QSignalMapper, sender trying to understand how I can catch the sender and manage to update my list. All this without success in the code.<br></div><div>And today, I tried again Qt.QueuedConnection, QGIS crashed. Without any changes, I tried again and it worked and continues to work. Adding and deleting composer in the composer manager echoes in my list.<br></div><div>I hope it will remain like that. <br></div><div><br></div><div>But now I realize that I didn't take into account the renaming of a composer. :(<br><br></div><div>I think I'd wisely keep the refreshlist button unless someone tells me how I can reach the composer manager dialog programmatically. So that I will try to synchronize my list with its widgetlistitems...<br></div><div><br></div><div>Thanks for all...<br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-03-31 14:50 GMT+02:00 Matthias Kuhn <span dir="ltr"><<a href="mailto:matthias@opengis.ch" target="_blank">matthias@opengis.ch</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
You should get a parameter containing the composer that is being
deleted with composerWillBeRemoved signal. Try to use that to infer
which composer has been removed. As the signal name indicates, at
the time it is emitted, the composer is not deleted yet.<br>
As an alternative you may make the connection with
Qt.QueuedConnection. It is possible that with this connection style
you will receive the signal after deletion and are able to continue
using your current update method.<br>
<br>
Best<span class="HOEnZb"><font color="#888888"><br>
Matthias</font></span><div><div class="h5"><br>
<br>
<div>On 03/31/2015 02:04 PM, Junior Delaz
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>
<div>Matthias,<br>
</div>
Thanks. I just give it a try it and all goes well with
composerAdded. <br>
</div>
But not really well with composerWillBeRemoved signal.
The first deletion in the composer manager does nothing
and deleting a second composer does remove the first one
in my list. and so on...<br>
My update function should be rewritten I think. I'll
try to see how improving it and may (surely) ask again
for help (if needed).<br>
</div>
<br>
</div>
</div>
While seeking information about composerWillBeRemoved, I found
a composerRemoved [1] [2] signal (that doesn't appear in the
API doc) and without being able to use it. :(<br>
[1] <a href="https://github.com/qgis/QGIS/blob/master/src/app/composer/qgscomposermanager.cpp" target="_blank">https://github.com/qgis/QGIS/blob/master/src/app/composer/qgscomposermanager.cpp</a>
(line 48<br>
[2] <a href="https://github.com/qgis/QGIS/blob/master/src/app/qgisapp.cpp" target="_blank">https://github.com/qgis/QGIS/blob/master/src/app/qgisapp.cpp</a>
(line 5601)<br>
<br>
</div>
Another thing that may not be related : what the
deletePrintComposers function (<a href="https://github.com/qgis/QGIS/blob/master/src/app/qgisapp.cpp" target="_blank">https://github.com/qgis/QGIS/blob/master/src/app/qgisapp.cpp</a>
line 5698) is for?<br>
<br>
Thanks again for the clue.</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-03-31 9:43 GMT+02:00 Matthias Kuhn
<span dir="ltr"><<a href="mailto:matthias@opengis.ch" target="_blank">matthias@opengis.ch</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> QgisInterface (iface)
has a composerAdded and composerWillBeRemoved signal.<br>
<br>
Did you try to connect to these?<br>
<br>
Best,<br>
Matthias
<div>
<div><br>
<br>
<div>On 03/31/2015 09:34 AM, Junior wrote:<br>
</div>
<blockquote type="cite">
<div style="font-family:'Calibri','sans-serif'">
<div>Hi all, Luca</div>
<div>Thanks for answering. But i already have an
update function that I linked to an update list
button. I even linked it to the icon on the
toolbar so that when user calls foreground the
dialog it's already updated.</div>
<div>The case I'd like to manage: user can open
plugin dialog and composer manager. The two
dialogs are visible (to the eyes) even
though composer manager is the one at
foreground. He makes changes and directly
clicked on the plugin dialog. He should update
list but if he forgets and executes, this may
lead to bug I don't want to / can't yet manage.</div>
<div>Reason why I want to ensure that list is
always up to date when he interacts with the
dialog</div>
<div><br>
</div>
<div>Envoyé depuis mon HTC</div>
<br>
<div>----- Reply message -----<br>
De : "Luca Manganelli" <a href="mailto:luca76@gmail.com" target="_blank"><luca76@gmail.com></a><br>
Pour :<br>
Cc : <a href="mailto:qgis-user@lists.osgeo.org" target="_blank">"qgis-user@lists.osgeo.org"</a>
<a href="mailto:qgis-user@lists.osgeo.org" target="_blank"><qgis-user@lists.osgeo.org></a>,
"qgis-developer" <a href="mailto:qgis-developer@lists.osgeo.org" target="_blank"><qgis-developer@lists.osgeo.org></a><br>
Objet : [Qgis-developer] [Qgis-user] Pyqt4 :
which signal is sent when dialog comes to
foreground?<br>
Date : mar., mars 31, 2015 07:56</div>
</div>
<br>
<pre style="word-wrap:break-word;white-space:pre-wrap">On Mon, Mar 30, 2015 at 6:12 PM, Junior Delaz <a href="mailto:delazj@gmail.com" target="_blank"><delazj@gmail.com></a> wrote:
> I've read about defining a custom showEvent function but can't understand
> where to put it and what inside.
> If somebody can give some tips...
You could add a "Update list" button
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