[Qgis-developer] Building plugin for Print Composer

[Nyall Dawson]

On 7 Aug 2015 6:58 pm, "Vincent Mora" <vincent.mora at oslandia.com> wrote:
>
> Hi all,
>
> I need to add graphs generated by a plugin to compositions. I'm
considering to develop a PluginComposerItem in the same spirit as
PluginLayers, adding/removing a button in the toolbar when the plugin is
registered/removed.

Just a warning that similar work is already underway - adding a composer
item type registry so that plugins can register their own custom item
types.

It's an extensive work though, because composer has a lot of hard coded
handling of all the existing item types (checkout all the item specific
methods in QgsComposition/QgsComposerView). That's why this work is tied up
with the layouts/reporting framework refactor.

Nyall

>
> Is that what was needed in your cases, or was a more general approach
required (like the qgis plugin mechanism, being able to access the
interface) ?
>
> V.
>
>
> Le 22/06/2015 18:05, G. Allegri a écrit :
>>
>> The suggestion from John is exactly what we did too. And we also built a
chart composer...
>>
>> It would be great to have the means to know what other teams are working
to. It would save a lor of time and money and, probably, get better
software from a shared effort ;)
>>
>> giovanni
>>
>> Il 22/giu/2015 19:31, "John Gitau" <gkahiu at gmail.com> ha scritto:
>>>
>>> Hi Jakob,
>>>
>>> A workaround would be to have a plugin that creates a new composer view
object:
>>>
>>> custom_composer = self.iface.createNewComposer("My Composer")
>>>
>>> Then get a reference to the main window in the composer view:
>>>
>>> main_window = custom_composer.composerWindow()
>>>
>>> Then you can either add a new toolbar (and required actions) or append
an action to the main toolbar. Have a look at the ComposerWrapper class for
something similar we implemented for designing charts in the composer:
https://gist.github.com/gkahiu/06a43a589f9441736397
>>>
>>> Hope this is helpful.
>>>
>>> Cheers,
>>>
>>> John
>>>
>>> On Mon, Jun 22, 2015 at 2:07 PM, G. Allegri <giohappy at gmail.com> wrote:
>>>>
>>>> You can act on it but you can't custom gui widgets to the Composer
interface.
>>>> I cannot check the code right know. I listen to a specific (existing)
composition opening but if I remember correctly you can watch the Composer
opening too.
>>>>
>>>> Il 22/giu/2015 17:19, "Jakob Lanstorp" <jlanstorp at gmail.com> ha
scritto:
>>>>>
>>>>> Hi Giovanni, thanks for the update. Another solution would be to
catch the
>>>>> event when a user starts an existing print composer. Cannot in doc
for the
>>>>> pyqgis API find anything for this. Anyone who know is one can listens
for a
>>>>> print composer to startup by the user and act on it.
>>>>>
>>>>>
>>>>>
>>>>> -----
>>>>> Jakob Lanstorp
>>>>> --
>>>>> View this message in context:
http://osgeo-org.1560.x6.nabble.com/Building-plugin-for-Print-Composer-tp5212187p5212221.html
>>>>> Sent from the Quantum GIS - Developer mailing list archive at
Nabble.com.
>>>>> _______________________________________________
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