5bab6126c1
Make the hack to get an Action selector slightly less hacky, in order to prevent an infinite redraw loop. No functional changes, except that `window_manager.selected_action` is only set when it needs to change.
129 lines
4.2 KiB
Python
129 lines
4.2 KiB
Python
# SPDX-FileCopyrightText: 2023 Blender Authors
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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"""NOTE: this is temporary UI code to show animation layers.
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It is not meant for any particular use, just to have *something* in the UI.
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"""
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import threading
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import bpy
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from bpy.types import (
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Panel,
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WindowManager,
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)
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from bpy.props import PointerProperty
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class VIEW3D_PT_animation_layers(Panel):
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bl_space_type = 'VIEW_3D'
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bl_region_type = 'UI'
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bl_category = "Animation"
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bl_label = "Baklava"
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@classmethod
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def poll(cls, context):
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return context.preferences.experimental.use_animation_baklava and context.object
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def draw(self, context) -> None:
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layout = self.layout
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layout.use_property_split = True
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layout.use_property_decorate = False
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# FIXME: this should be done in response to a message-bus callback, notifier, whatnot.
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adt = context.object.animation_data
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with _wm_selected_action_lock:
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selected_action = getattr(adt, 'action', None)
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# Only set if it has to change, to avoid unnecessary notifies (that cause
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# a redraw, that cause this code to be called, etc.)
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if context.window_manager.selected_action != selected_action:
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context.window_manager.selected_action = selected_action
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col = layout.column()
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# This has to go via an auxiliary property, as assigning an Animation
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# data-block should be possible even when `context.object.animation_data`
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# is `None`, and thus its `animation` property does not exist.
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col.template_ID(context.window_manager, 'selected_action')
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col = layout.column(align=False)
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anim = adt and adt.action
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if anim:
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binding_sub = col.column(align=True)
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# Binding selector.
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row = binding_sub.row(align=True)
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row.prop(adt, 'action_binding', text="Binding")
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row.operator('anim.binding_unassign_object', text="", icon='X')
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binding = anim.bindings.get(adt.action_binding, None)
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if binding:
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binding_sub.prop(binding, 'name_display', text="Name")
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internal_sub = binding_sub.box().column(align=True)
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internal_sub.active = False
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internal_sub.prop(adt, 'action_binding_handle', text="handle")
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if binding:
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internal_sub.prop(binding, 'name', text="Internal Name")
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if adt:
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col.prop(adt, 'action_binding_name', text="ADT Binding Name")
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else:
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col.label(text="ADT Binding Name: -")
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layout.separator()
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if not anim:
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layout.label(text="No layers")
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return
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for layer_idx, layer in reversed(list(enumerate(anim.layers))):
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layerbox = layout.box()
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col = layerbox.column(align=True)
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col.prop(layer, "name", text="Layer {:d}:".format(layer_idx + 1))
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col.prop(layer, "influence")
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col.prop(layer, "mix_mode")
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classes = (
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VIEW3D_PT_animation_layers,
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)
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_wm_selected_action_lock = threading.Lock()
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def _wm_selected_action_update(wm, context):
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# Avoid responding to changes written by the panel above.
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lock_ok = _wm_selected_action_lock.acquire(blocking=False)
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if not lock_ok:
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return
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try:
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if wm.selected_action is None and context.object.animation_data is None:
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return
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adt = context.object.animation_data_create()
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if adt.action == wm.selected_action:
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# Avoid writing to the property when the new value hasn't changed.
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return
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adt.action = wm.selected_action
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finally:
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_wm_selected_action_lock.release()
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def register_props():
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# Due to this hackyness, the WindowManager will increase the user count of
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# the pointed-to Animation data-block.
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WindowManager.selected_action = PointerProperty(
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type=bpy.types.Action,
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name="Action",
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description="Action assigned to the active Object",
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update=_wm_selected_action_update,
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)
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if __name__ == "__main__": # only for live edit.
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register_, _ = bpy.utils.register_classes_factory(classes)
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register_()
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register_props()
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