smillmorel
612936a00b
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74 lines
2.5 KiB
Python
74 lines
2.5 KiB
Python
"""Commands that mutate the project's coordinate/grid systems."""
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from __future__ import annotations
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from typing import TYPE_CHECKING
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from otko.commands.base import ProjectCommand
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from otko.core.geometry import CoordinateGridSystem, GridSystem
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if TYPE_CHECKING:
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from otko.viewmodels import ProjectViewModel
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class SetCoordSystemsCommand(ProjectCommand):
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"""Replace the project's full list of coordinate/grid systems atomically.
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Used by the Coordinate/Grid Systems dialog which edits the whole
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list at once (add / copy / modify / delete all go through here).
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"""
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def __init__(
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self,
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vm: "ProjectViewModel",
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new_systems: list[CoordinateGridSystem],
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) -> None:
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super().__init__(vm, "Update coordinate/grid systems")
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self._new = list(new_systems)
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self._previous: list[CoordinateGridSystem] | None = None
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def redo(self) -> None:
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self._previous = [cs.model_copy(deep=True) for cs in self.project.coord_systems]
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self.project.coord_systems = list(self._new)
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self._notify()
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def undo(self) -> None:
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if self._previous is not None:
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self.project.coord_systems = list(self._previous)
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self._notify()
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class SetGridSystemCommand(ProjectCommand):
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"""Compat: update the Global system's grid lines in one undoable step.
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Retained for existing callers (the single-grid dialog path). New code
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should prefer :class:`SetCoordSystemsCommand` which can edit multiple
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systems at once.
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"""
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def __init__(self, vm: "ProjectViewModel", new_grid: GridSystem) -> None:
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super().__init__(vm, "Update grid system")
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self._new_grid = new_grid
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self._previous: GridSystem | None = None
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def redo(self) -> None:
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# Replace the grid on the Global system.
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for i, cs in enumerate(self.project.coord_systems):
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if cs.name == "Global":
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self._previous = cs.grid.model_copy(deep=True)
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self.project.coord_systems[i] = cs.model_copy(
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update={"grid": self._new_grid},
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)
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break
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self._notify()
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def undo(self) -> None:
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if self._previous is None:
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return
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for i, cs in enumerate(self.project.coord_systems):
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if cs.name == "Global":
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self.project.coord_systems[i] = cs.model_copy(
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update={"grid": self._previous},
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)
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break
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self._notify()
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