Mixins

qtextra.mixins collects reusable behavior blocks that are shared by dialogs, popups, and other composite widgets.

The module currently focuses on:

• documentation and help buttons
• configuration hydration guards
• periodic and one-shot timers
• notification helpers
• minimize, close, and drag-and-drop behaviors

Common Mixins

• DocumentationMixin: adds tutorial and help-button layouts and resolves local docs/... links into file URIs.
• ConfigMixin: wraps configuration application so widgets can suppress side-effects while state is being restored.
• TimerMixin: creates widget-owned timers and exposes a small timing context manager.
• IndicatorMixin: emits the global toast, message, and notification signals used elsewhere in the library.

Notes

• ConfigMixin.setting_config() restores its internal guard flag even if applying configuration raises an exception.
• TimerMixin._add_single_shot_timer() returns a real one-shot QTimer instance that stays owned by the widget.