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Hi!</p>
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I'm tryng to implement autocollapse in pipeline browser, but overriding pqPipelineBrowserWidget::expandWithModelIndexTranslation or implement my method for autocollapse cause crashes, e.g</p>
<pre class="code highlight js-syntax-highlight cpp white" style="box-sizing: border-box; overflow: auto; font-family: Menlo, "Liberation Mono", Consolas, "DejaVu Sans Mono", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-size: 13px; padding: 10px; margin-top: 12px; margin-bottom: 12px; line-height: 1.6em; word-break: break-all; word-wrap: break-word; color: rgb(51, 51, 51); background-color: rgb(255, 255, 255); border: 1px solid rgb(229, 229, 229); border-radius: 2px; text-shadow: none;"><code style="box-sizing: border-box; font-family: Menlo, "Liberation Mono", Consolas, "DejaVu Sans Mono", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-size: inherit; padding: 0px; color: inherit; background-color: transparent; border-radius: 0px; word-wrap: normal; margin-top: 0px;"><span class="kt" style="box-sizing: border-box; margin-top: 0px; color: rgb(68, 85, 136); font-weight: bold;">void</span> <span class="n" style="box-sizing: border-box;">pqPipelineBrowserWidget</span><span class="o" style="box-sizing: border-box; font-weight: bold;">::</span><span class="n" style="box-sizing: border-box;">collapseWithModelTranslation</span><span class="p" style="box-sizing: border-box;">(</span><span class="k" style="box-sizing: border-box; font-weight: bold;">const</span> <span class="n" style="box-sizing: border-box;">QModelIndex</span><span class="o" style="box-sizing: border-box; font-weight: bold;">&</span> <span class="n" style="box-sizing: border-box;">index</span><span class="p" style="box-sizing: border-box;">)</span>
<span class="p" style="box-sizing: border-box;">{</span>
<span class="k" style="box-sizing: border-box; font-weight: bold;">this</span><span class="o" style="box-sizing: border-box; font-weight: bold;">-></span><span class="n" style="box-sizing: border-box;">collapse</span><span class="p" style="box-sizing: border-box;">(</span><span class="k" style="box-sizing: border-box; font-weight: bold;">this</span><span class="o" style="box-sizing: border-box; font-weight: bold;">-></span><span class="n" style="box-sizing: border-box;">FilteredPipelineModel</span><span class="o" style="box-sizing: border-box; font-weight: bold;">-></span><span class="n" style="box-sizing: border-box;">mapFromSource</span><span class="p" style="box-sizing: border-box;">(</span><span class="n" style="box-sizing: border-box;">index</span><span class="p" style="box-sizing: border-box;">));</span>
<span class="p" style="box-sizing: border-box;">}</span>
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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.</p>
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Where did I go wrong?</p>
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Shagit Ziganshin</p>
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