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66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Operation Lock Mixin
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Provides reliable button state management for GUI operations
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"""
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from contextlib import contextmanager
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class OperationLockMixin:
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"""
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Mixin that provides reliable button state management.
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Ensures controls are always re-enabled after operations, even if exceptions occur.
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"""
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def operation_lock(self):
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"""
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Context manager that ensures controls are always re-enabled after operations.
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Usage:
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with self.operation_lock():
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# Perform operation that might fail
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risky_operation()
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# Controls are guaranteed to be re-enabled here
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"""
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@contextmanager
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def lock_manager():
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try:
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if hasattr(self, '_disable_controls_during_operation'):
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self._disable_controls_during_operation()
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yield
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finally:
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# Ensure controls are re-enabled even if exceptions occur
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if hasattr(self, '_enable_controls_after_operation'):
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self._enable_controls_after_operation()
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return lock_manager()
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def safe_operation(self, operation_func, *args, **kwargs):
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"""
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Execute an operation with automatic button state management.
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Args:
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operation_func: Function to execute
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*args, **kwargs: Arguments to pass to operation_func
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Returns:
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Result of operation_func or None if exception occurred
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"""
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try:
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with self.operation_lock():
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return operation_func(*args, **kwargs)
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except Exception as e:
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# Log the error but don't re-raise - controls are already re-enabled
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if hasattr(self, 'logger'):
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self.logger.error(f"Operation failed: {e}", exc_info=True)
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# Could also show user error dialog here if needed
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return None
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def reset_screen_to_defaults(self):
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"""
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Reset the screen to default state when navigating back from main menu.
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Override this method in subclasses to implement screen-specific reset logic.
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"""
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pass # Default implementation does nothing - subclasses should override |