106 lines
2.3 KiB
Python
106 lines
2.3 KiB
Python
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import typing as typ
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import bpy
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from .. import contracts
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class BLSocket(bpy.types.NodeSocket):
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"""A base type for nodes that greatly simplifies the implementation of
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reliable, powerful nodes.
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Should be used together with `contracts.BLSocketProtocol`.
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"""
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def __init_subclass__(cls, **kwargs: typ.Any):
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super().__init_subclass__(**kwargs) ## Yucky superclass setup.
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# Set bl_idname
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cls.bl_idname = cls.socket_type.value
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# Declare Node Property: 'preset' EnumProperty
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if hasattr(cls, "draw_preview"):
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cls.__annotations__["preview_active"] = bpy.props.BoolProperty(
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name="Preview",
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description="Preview the socket value",
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default=False,
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)
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####################
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# - Methods
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####################
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def is_compatible(self, value: typ.Any) -> bool:
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for compatible_type, checks in self.compatible_types.items():
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if (
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compatible_type is typ.Any or
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isinstance(value, compatible_type)
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):
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return all(check(value) for check in checks)
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return False
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####################
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# - UI
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####################
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@classmethod
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def draw_color_simple(cls) -> contracts.BlenderColorRGB:
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return cls.socket_color
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def draw(
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self,
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context: bpy.types.Context,
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layout: bpy.types.UILayout,
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node: bpy.types.Node,
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text: str,
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) -> None:
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if self.is_output:
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self.draw_output(context, layout, node, text)
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else:
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self.draw_input(context, layout, node, text)
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def draw_input(
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self,
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context: bpy.types.Context,
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layout: bpy.types.UILayout,
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node: bpy.types.Node,
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text: str,
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) -> None:
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if self.is_linked:
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layout.label(text=text)
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return
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# Column
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col = layout.column(align=True)
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# Row: Label & Preview Toggle
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label_col_row = col.row(align=True)
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if hasattr(self, "draw_label_row"):
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self.draw_label_row(label_col_row, text)
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else:
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label_col_row.label(text=text)
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if hasattr(self, "draw_preview"):
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label_col_row.prop(
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self,
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"preview_active",
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toggle=True,
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text="",
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icon="SEQ_PREVIEW",
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)
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# Row: Preview (in Box)
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if hasattr(self, "draw_preview"):
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if self.preview_active:
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col_box = col.box()
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self.draw_preview(col_box)
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# Row(s): Value
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if hasattr(self, "draw_value"):
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self.draw_value(col)
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def draw_output(
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self,
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context: bpy.types.Context,
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layout: bpy.types.UILayout,
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node: bpy.types.Node,
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text: str,
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) -> None:
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layout.label(text=text)
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