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d68f375e38
Found via `codespell -q 3 -S *.po,*.pot -L childs,initialy,lod,ned,te,slicable,sur,tutoriels,wont`
70 lines
3.1 KiB
Python
70 lines
3.1 KiB
Python
# Copyright (c) 2018 Ultimaker B.V.
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# Cura is released under the terms of the LGPLv3 or higher.
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from typing import TYPE_CHECKING, Callable, List
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from UM.Logger import Logger
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if TYPE_CHECKING:
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from cura.CuraApplication import CuraApplication
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#
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# This class manages a all registered upon-exit checks that need to be perform when the application tries to exit.
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# For example, to show a confirmation dialog when there is USB printing in progress, etc. All callbacks will be called
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# in the order of when they got registered. If all callbacks "passes", that is, for example, if the user clicks "yes"
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# on the exit confirmation dialog or nothing that's blocking the exit, then the application will quit after that.
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#
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class OnExitCallbackManager:
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def __init__(self, application: "CuraApplication") -> None:
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self._application = application
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self._on_exit_callback_list = list() # type: List[Callable]
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self._current_callback_idx = 0
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self._is_all_checks_passed = False
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def addCallback(self, callback: Callable) -> None:
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self._on_exit_callback_list.append(callback)
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Logger.log("d", "on-app-exit callback [%s] added.", callback)
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# Reset the current state so the next time it will call all the callbacks again.
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def resetCurrentState(self) -> None:
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self._current_callback_idx = 0
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self._is_all_checks_passed = False
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def getIsAllChecksPassed(self) -> bool:
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return self._is_all_checks_passed
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# Trigger the next callback if available. If not, it means that all callbacks have "passed", which means we should
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# not block the application to quit, and it will call the application to actually quit.
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def triggerNextCallback(self) -> None:
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# Get the next callback and schedule that if
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this_callback = None
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if self._current_callback_idx < len(self._on_exit_callback_list):
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this_callback = self._on_exit_callback_list[self._current_callback_idx]
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self._current_callback_idx += 1
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if this_callback is not None:
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Logger.log("d", "Scheduled the next on-app-exit callback [%s]", this_callback)
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self._application.callLater(this_callback)
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else:
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Logger.log("d", "No more on-app-exit callbacks to process. Tell the app to exit.")
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self._is_all_checks_passed = True
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# Tell the application to exit
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self._application.callLater(self._application.closeApplication)
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# This is the callback function which an on-exit callback should call when it finishes, it should provide the
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# "should_proceed" flag indicating whether this check has "passed", or in other words, whether quitting the
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# application should be blocked. If the last on-exit callback doesn't block the quitting, it will call the next
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# registered on-exit callback if available.
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def onCurrentCallbackFinished(self, should_proceed: bool = True) -> None:
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if not should_proceed:
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Logger.log("d", "on-app-exit callback finished and we should not proceed.")
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# Reset the state
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self.resetCurrentState()
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return
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self.triggerNextCallback()
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