Introduction

PyQt6 MultiSelectComboBox is a custom widget that extends the idea of QComboBox to allow selecting multiple items. It focuses on:

  • Performance with large item sets

  • Clean, convenient APIs similar to QComboBox

  • Fine-grained control over output type (text or data) and data roles

  • Optional tri-state “Select All” item

  • Batch APIs for updating without flicker

Who is this for?

  • Developers building PyQt6 apps who need a compact, discoverable multi-select UI.

  • Teams wanting a lightweight dependency with strong defaults and good customization.

Key capabilities

  • Multiple selection with checkable items

  • Output control (currentText() vs currentData()) and configurable data role

  • Bulk helpers: selectAll(), clearSelection(), invertSelection()

  • Programmatic selection via setCurrentText() (string or list)

  • Parity helpers: findText(), findData()

Next steps