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QStringListModel stores exactly what it shows. When your display format diverges from your data—like showing file names for full paths—you need a custom QAbstractItemModel. Here is how to implement the required functions and keep views synchronized.
Loading 100,000 records into a QListWidget copies every item into widget memory. A custom QAbstractListModel exposes your existing container directly to the view, keeping one source of truth and avoiding duplication.
An architecture note for Qt model/view UIs: keep the model on the GUI thread, reach it from workers only via queued signals, and treat begin/end insert pairing as a hard invariant.
Step‑by‑step guide to subclass QAbstractItemModel for a read‑only string list and attach it to a QListView, with verification and troubleshooting tips.
Build a thread-safe Qt list model by subclassing QAbstractListModel, exposing it to QML, and marshaling background updates via queued signals. Covers required virtuals, editable roles, structural change signals, and common pitfalls.
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