09aa799e53
- Logical use of fields since they define type information. - Avoids using ordered-dict metaclass. Properties using regular assignments will print a warning and load, however the order is undefined.
48 lines
2.1 KiB
Python
48 lines
2.1 KiB
Python
import bpy
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class MESH_UL_mylist(bpy.types.UIList):
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# Constants (flags)
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# Be careful not to shadow FILTER_ITEM (i.e. UIList().bitflag_filter_item)!
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# E.g. VGROUP_EMPTY = 1 << 0
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# Custom properties, saved with .blend file. E.g.
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# use_filter_empty: bpy.props.BoolProperty(
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# name="Filter Empty", default=False, options=set(),
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# description="Whether to filter empty vertex groups",
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# )
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# Called for each drawn item.
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def draw_item(self, context, layout, data, item, icon, active_data, active_propname, index, flt_flag):
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# 'DEFAULT' and 'COMPACT' layout types should usually use the same draw code.
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if self.layout_type in {'DEFAULT', 'COMPACT'}:
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pass
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# 'GRID' layout type should be as compact as possible (typically a single icon!).
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elif self.layout_type in {'GRID'}:
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pass
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# Called once to draw filtering/reordering options.
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def draw_filter(self, context, layout):
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# Nothing much to say here, it's usual UI code...
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pass
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# Called once to filter/reorder items.
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def filter_items(self, context, data, propname):
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# This function gets the collection property (as the usual tuple (data, propname)), and must return two lists:
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# * The first one is for filtering, it must contain 32bit integers were self.bitflag_filter_item marks the
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# matching item as filtered (i.e. to be shown), and 31 other bits are free for custom needs. Here we use the
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# first one to mark VGROUP_EMPTY.
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# * The second one is for reordering, it must return a list containing the new indices of the items (which
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# gives us a mapping org_idx -> new_idx).
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# Please note that the default UI_UL_list defines helper functions for common tasks (see its doc for more info).
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# If you do not make filtering and/or ordering, return empty list(s) (this will be more efficient than
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# returning full lists doing nothing!).
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# Default return values.
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flt_flags = []
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flt_neworder = []
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# Do filtering/reordering here...
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return flt_flags, flt_neworder
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