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<div>Hi!</div>
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<div>I'm tryng to implement autocollapse in pipeline browser, but overriding pqPipelineBrowserWidget::expandWithModelIndexTranslation or implement my method for autocollapse cause crashes, e.g</div>
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<div>``` c++</div>
<div>void pqPipelineBrowserWidget::collapseWithModelTranslation(const QModelIndex& index)</div>
<div>{</div>
<div> this->collapse(this->FilteredPipelineModel->mapFromSource(index));</div>
<div>}</div>
<div>```</div>
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<div>this method calling by a signal in pqPipelineModel::addChild. The signal emitts like a pqPipelineModel::firstChildAdded signal, but my signal calls when row count is more than 0.</div>
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<div>Where did I go wrong?</div>
<br>
Shagit Ziganshin
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