QTreeView Not displaying

[norobro]

You need to create your model on the heap:

TreeModel *model = new TreeModel(file.readAll());
file.close();
ui->navigationTreeView->setModel(model);
//ui->navigationTreeView->show();

TreeModel *model = new TreeModel(file.readAll());
file.close();
ui->navigationTreeView->setModel(model);
//ui->navigationTreeView->show();

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