ui.py 文件源码

def enum_sprite_previews(self, context):
    """EnumProperty callback"""
    enum_items = []
    if context is None:
        return enum_items
    if self.coa_type == "MESH":

        # Get the preview collection (defined in register func).
        coa_pcoll = preview_collections["coa_thumbs"]

        #thumb_dir_path = bpy.utils.user_resource("DATAFILES","coa_thumbs")
        thumb_dir_path = os.path.join(context.user_preferences.filepaths.temporary_directory,"coa_thumbs")

        if os.path.exists(thumb_dir_path):
            # Scan the directory for png files
            image_paths = []
            for fn in os.listdir(thumb_dir_path):
                if fn.lower().endswith(".png") and self.name in fn:
                    image_paths.append(fn)      
            for i, name in enumerate(image_paths):
                if i < self.coa_tiles_x * self.coa_tiles_y:
                    filepath = os.path.join(thumb_dir_path, name)

                    if name in coa_pcoll:
                        thumb = coa_pcoll[name]
                    else:    
                        thumb = coa_pcoll.load(name, filepath, 'IMAGE')
                    enum_items.append((str(i), name, "", thumb.icon_id, i))
    elif self.coa_type == "SLOT":
        for i,slot in enumerate(self.coa_slot):
            if slot.mesh != None:
                img = slot.mesh.materials[0].texture_slots[0].texture.image
                icon = bpy.types.UILayout.icon(img)
                enum_items.append((str(i), slot.mesh.name, "", icon, i))

    return enum_items