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<p>Hello everyone,</p>
<p><br>
</p>
<p>I would like to access <span>QgisApp::instance() (<span>src/app/qgisapp.cpp)</span> from a provider like <span>QgsOgrProvider::extent()</span> (<span>src/core/providers/ogr/qgsogrprovider.cpp</span>. </span></p>
<p>Yet I cannot include "qgisapp.h" into the provider. <br>
</p>
<p><br>
</p>
<p>When looking for this information I found some inactivating preprocessor code block comments like this one (qgswfsdataitems.cpp):</p>
<p>#if 0<br>
</p>
<p></p>
<div> // TODO: how to emit message from provider (which does not know about QgisApp)<br>
QgisApp::instance()->messageBar()->pushMessage( tr( "Cannot copy style" ),<br>
errorMsg,<br>
Qgis::MessageLevel::Critical, messageTimeout() );<br>
#endif</div>
<p></p>
<p><br>
</p>
<p></p>
<div>Does anybody know what is the idea to access the current <span>QgisApp::instance() from outside the QgisApp realm?</span></div>
<div><span><br>
</span></div>
<div><span><br>
</span></div>
<div><span>Best regards, Tobias</span><br>
</div>
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