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# --------------------------------------------------------
# InternVL
# Copyright (c) 2024 OpenGVLab
# Licensed under The MIT License [see LICENSE for details]
# Modified from https://github.com/hreikin/streamlit-uploads-library/blob/main/streamlit_uploads_library/library.py
# --------------------------------------------------------
import logging
from math import ceil
import streamlit as st
logger = logging.getLogger(__name__)
class Library():
"""Create a simple library out of streamlit widgets.
Using the library is simple, import `streamlit_uploads_library` and then instantiate the class with the
required `directory` variable. Other options can be configured by passing in different variables
when instantiating the class.
Example Usage:
python
import streamlit as st
from library import Library
st.set_page_config(page_title="Streamlit Uploads Library", layout="wide")
default_library = Library(images=pil_images)
"""
def __init__(self, images, image_alignment='end', number_of_columns=5):
self.images = images
self.image_alignment = image_alignment
self.number_of_columns = number_of_columns
self.root_container = self.create(images=self.images,
image_alignment=self.image_alignment,
number_of_columns=self.number_of_columns)
def create(_self, images, image_alignment, number_of_columns):
"""Creates a simple library or gallery with columns.
Creates a library or gallery using columns out of streamlit widgets.
"""
root_container = st.container()
with root_container:
# To be able to display the images, details and buttons all in one row and aligned
# correctly so that images of different sizes don't affect the alignment of the details
# and buttons we need do some minor maths and keep track of multiple index values.
# First we instantiate some defaults.
col_idx = 0
filename_idx = 0
max_idx = number_of_columns - 1
# Get the file list and filename list, work out the total number of files from the
# length of the file list.
library_files = images
num_of_files = len(library_files)
# Work out the number of rows required by dividing the number of files by the number of
# columns and rounding up using `math.ceil`.
num_of_rows_req = ceil(num_of_files / number_of_columns)
# Create the required number of rows (st.container).
library_rows = list()
library_rows_idx = 0
for i in range(num_of_rows_req):
library_rows.append(st.container())
# For each library row we need to create separate rows (st.container) for images,
# and rows (st.expander) for details and buttons to keep them in the correct columns.
for idx in range(num_of_rows_req):
with library_rows[library_rows_idx]:
imgs_columns = list(st.columns(number_of_columns))
# Since we are keeping track of the column and filename indexes we can use
# those to slice the `library_files` list at the correct points for each row
# and then increase or reset the indexes as required.
for img in library_files[filename_idx:(filename_idx + number_of_columns)]:
with imgs_columns[col_idx]:
st.image(img, use_column_width='auto')
st.write(
f"""<style>
[data-testid="stHorizontalBlock"] {{
align-items: {image_alignment};
}}
</style>
""",
unsafe_allow_html=True
)
# Keeps track of the current column, if we reach the `max_idx` we reset it
# to 0 and increase the row index. This combined with the slicing should
# ensure all images, details and buttons are in the correct columns.
if col_idx < max_idx:
col_idx += 1
else:
col_idx = 0
library_rows_idx += 1
filename_idx += 1
return root_container
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