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20b3b6da79
Some stuff I had to ask the original implementer to explain to me. So I wrote that down so that the next guy doesn't have to do that. Contributes to issue CURA-5829.
52 lines
2.2 KiB
Python
52 lines
2.2 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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import os.path
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from UM.Qt.QtApplication import QtApplication
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from cura.Stages.CuraStage import CuraStage
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from typing import TYPE_CHECKING, Optional
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if TYPE_CHECKING:
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from UM.View.View import View
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## Displays a preview of what you're about to print.
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#
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# The Python component of this stage just loads PreviewMain.qml for display
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# when the stage is selected, and makes sure that it reverts to the previous
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# view when the previous stage is activated.
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class PreviewStage(CuraStage):
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def __init__(self, application: QtApplication, parent = None) -> None:
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super().__init__(parent)
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self._application = application
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self._application.engineCreatedSignal.connect(self._engineCreated)
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self._previously_active_view = None # type: Optional[View]
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## When selecting the stage, remember which was the previous view so that
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# we can revert to that view when we go out of the stage later.
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def onStageSelected(self) -> None:
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self._previously_active_view = self._application.getController().getActiveView()
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## Called when going to a different stage (away from the Preview Stage).
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#
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# When going to a different stage, the view should be reverted to what it
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# was before. Normally, that just reverts it to solid view.
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def onStageDeselected(self) -> None:
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if self._previously_active_view is not None:
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self._application.getController().setActiveView(self._previously_active_view.getPluginId())
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self._previously_active_view = None
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## Delayed load of the QML files.
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#
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# We need to make sure that the QML engine is running before we can load
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# these.
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def _engineCreated(self) -> None:
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plugin_path = self._application.getPluginRegistry().getPluginPath(self.getPluginId())
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if plugin_path is not None:
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menu_component_path = os.path.join(plugin_path, "PreviewMenu.qml")
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main_component_path = os.path.join(plugin_path, "PreviewMain.qml")
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self.addDisplayComponent("menu", menu_component_path)
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self.addDisplayComponent("main", main_component_path)
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