303014bfac
a958ae36e8 introduced support for UI lists to reference items that would never be shown, regardless of filter settings. This was to skip assets in the asset view template that were not of the requested type. UI list sorting code wasn't updated to account for such items that should be entirely ignored. Pull Request: https://projects.blender.org/blender/blender/pulls/109157
49 lines
2.2 KiB
Python
49 lines
2.2 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 == '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). The upper 16 bits (including self.bitflag_filter_item) are
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# reseverd for internal use, the lower 16 bits are free for custom use. Here we use the first bit to mark
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# 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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