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"""
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Streamlit application
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"""
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import streamlit as st
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from loguru import logger
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import lsystog as ls
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def on_change_selection():
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"""
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Change the pattern when the starting pattern is changed
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:return: None
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"""
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current_selection = st.session_state.my_selection
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st.session_state.my_pattern = current_selection
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@st.cache_data
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def load_img(pattern, colors, nb_iterations, apply_rotation):
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"""
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Return an image computed from the parameters
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:return: image
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"""
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func_transf = ls.strc_2_strc_90 if apply_rotation else None
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try:
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gls = ls.Lsystg(axiom=None, rules=None, nbiter=nb_iterations, patterns=[pattern], colors=colors,
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banned_colors='/', nb_dest=1, verbose=True, func_transf=func_transf)
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image = gls.img(img_fpath="", col_fond=(0, 0, 0, 255))
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except ls.LsystError as ex:
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st.warning(ex)
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st.stop()
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except Exception as ex:
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st.warning("Please verify your parameters. Special characters are not permitted in the pattern except for '?'")
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logger.error(f"Something went wrong : {ex}")
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st.stop()
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else:
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return image
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st.set_page_config(page_title="Gridz", page_icon="🖼️")
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st.markdown("# Gridz")
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VERBOSE = False
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first_time = True
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MD1 = """
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You have the flexibility to define your own colors and pattern
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Simply click on "Draw" when you are satisfied with your new input :sunglasses:
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"""
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MD2 = """
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The possible colors are :
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- R : Red
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- G : Green
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- B : Blue
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- W : White
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- K : Black
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- Y : Yellow
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- M : Magenta
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- O : Orange
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- D : Dim gray
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- F : Forest green
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- N : Navy
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- P : Purple
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- T : Background color (black)
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- ? : Random color
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The pattern assigns colors from left to right and from top to bottom, with each "row" separated by an underscore
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The pattern consists of "rotating" colors represented by digits and fixed colors (refer to the available colors mentioned above)
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To understand how the pattern functions, try drawing with just one iteration
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"""
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EXAMPLES_LIST = ['00000_01210_02020_01210_00000', '012_120_201', '1001_0220_0220_1001',
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'00000_01110_01210_01110_00000', 'T000T_01210_02020_01210_T000T', '00000_01210_02T20_01210_00000',
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'1112T2_1T12T2_111222_1TTT2T_1TTT2T_1TTT2T']
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st.sidebar.markdown(MD1)
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input_selection = st.sidebar.selectbox('Choose a starting pattern', EXAMPLES_LIST,
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index=0, on_change=on_change_selection, key="my_selection")
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EXAMPLES = f"""
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Few possible patterns with 3 colors (GRB for example) that you can select
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- **:green[{EXAMPLES_LIST[1]}]** ( 3X3 )
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- **:green[{EXAMPLES_LIST[2]}]** ( 4X4 )
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- **:green[{EXAMPLES_LIST[3]}]** ( 5X5 )
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- **:green[{EXAMPLES_LIST[4]}]** ( 5X5 )
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- **:green[{EXAMPLES_LIST[5]}]** ( 5X5 )
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- **:green[1112T2_1T12T2_..._1TTT2T_1TTT2T]** ( 6X6 )
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"""
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st.sidebar.markdown(EXAMPLES)
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st.sidebar.markdown(MD2)
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with st.form("my_form"):
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col = st.text_input('Colors', 'GRB', key='my_colors')
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pat = st.text_input('Pattern', EXAMPLES_LIST[0], key='my_pattern')
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rotation = st.checkbox("90° rotation", True)
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nb_iter = st.number_input('Number of iterations', value=4, min_value=1, max_value=10, format='%d')
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submitted = st.form_submit_button("Draw")
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if submitted or first_time:
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first_time = False
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img = load_img(pat, col, nb_iter, rotation)
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st.image(img, caption='Generated image')
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st.markdown("---")
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