Blender Reference Manager

Blender Reference Manager.py

```
import os
import bpy
import bpy.utils.previews

def get_image(filepath):
    name = os.path.basename(filepath)
    if name not in bpy.data.images:
        bpy.ops.image.open(filepath = filepath)
        return bpy.data.images(name)

def open_image(self, context):
    image = get_image(self.reference_images_enum)
    for area in bpy.context.screen.areas :
        if area.type == 'IMAGE_EDITOR' :
            area.spaces.active.image = image

def get_previews_collection(self, context):
    images = []
    custom_icons = preview_collections["main"]
    directory = "C:\Icons"
    i = 0

    if directory == custom_icons.my_previews_dir:
        return custom_icons.my_previews

    for file in os.listdir(directory):
        if file.endswitch(".png"):
            fullpath = os.path.join(directory, file)
            custom_icons.load(file, fullpath, 'IMAGE')
            images.append((fullpath, file, fullpath, custom_icons(file).icon_id, i))
            i+=1

            custom_icons.my_previews = images
            custom_icons.my_previews_dir = directory
            return custom_icons.my_previews

class ReferenceManagerPanel(bpy.types.Panel):
    """ A custom Panel in the viewport toolbar """
    bl_label = "Reference Images"
    bl_space_type = "VIEW_3D"
    bl_region_type = "TOOLS"

    def draw(self, context):
        layout = self.layout

        row = layout.row
        row.template_icon_view(context.window_manager, "reference_images_enum")

        row = layout.row
        row.prop(context.window_manager, "reference_images_enum")

        preview_collections = {}

def register():
    bpy.types.WindowManager.reference_images_enum = bpy.props.EnumProperty(
    items = get_previews_collection,
    update = open_image
    )

    preview_collection = bpy.utils.previews.new()
    preview_collection.my_previews_dir = ""
    preview_collection.my_previews = ()
    preview_collections['main'] = preview_collection

    bpy.utils.register_class(ReferenceManagerPanel)

def unregister():
    del bpy.types.Scene.reference_images_enum

    for preview_collection in preview_collections.values():
        bpy.utils.previews.remove(preview_collection)
        preview_collections.clear()

        bpy.utils.unregister_class(ReferenceManagerPanel)

    if __name__ == "__main__":
        register()
```