display image simply

streamlit_app.py

@@ -1,124 +1,118 @@
-"""
-Streamlit application
-"""
-import streamlit as st
-from streamlit.errors import StreamlitAPIException
-from loguru import logger
-
-import lsystog as ls
-
-
-def on_change_selection():
-    """
-    Change the pattern when the starting pattern is changed
-
-    :return: None
-    """
-    current_selection = st.session_state.my_selection
-    st.session_state.my_pattern = current_selection
-
-
-@st.cache_data
-def load_img(pattern, colors, nb_iterations, apply_rotation):
-    """
-    Return an image computed from the parameters
-
-    :return: image
-    """
-    func_transf = ls.strc_2_strc_90 if apply_rotation else None
-    try:
-        gls = ls.Lsystg(axiom=None, rules=None, nbiter=nb_iterations, patterns=[pattern], colors=colors,
-                        banned_colors='/', nb_dest=1, verbose=True, func_transf=func_transf)
-        image = gls.img(img_fpath="", col_fond=(0, 0, 0, 255))
-    except ls.LsystError as ex:
-        st.warning(ex)
-        st.stop()
-    except Exception as ex:
-        st.warning("Please verify your parameters. Special characters are not permitted in the pattern except for '?'")
-        logger.error(f"Something went wrong : {ex}")
-        st.stop()
-    else:
-        return image
-
-
-st.set_page_config(page_title="Gridz", page_icon="🖼️")
-st.markdown("# Gridz")
-
-VERBOSE = False  # Set verbose to true for more printed information
-first_time = True  # At start, no need to click the draw button
-
-MD1 = """
-You have the flexibility to define your own colors and pattern
-
-Simply click on "Draw" when you are satisfied with your new input :sunglasses:
-"""
-
-MD2 = """
-The possible colors are :
-- R : Red
-- G : Green
-- B : Blue
-- W : White
-- K : Black
-- Y : Yellow
-- M : Magenta
-- O : Orange
-- D : Dim gray
-- F : Forest green
-- N : Navy
-- P : Purple
-- T : Background color (black)
-- ? : Random color
-
-The pattern assigns colors from left to right and from top to bottom, with each "row" separated by an underscore
-
-The pattern consists of "rotating" colors represented by digits and fixed colors (refer to the available colors mentioned above)
-
-To understand how the pattern functions, try drawing with just one iteration
-"""
-
-EXAMPLES_LIST = ['00000_01210_02020_01210_00000', '012_120_201', '1001_0220_0220_1001',
-                 '00000_01110_01210_01110_00000', 'T000T_01210_02020_01210_T000T', '00000_01210_02T20_01210_00000',
-                 '1112T2_1T12T2_111222_1TTT2T_1TTT2T_1TTT2T']
-
-st.sidebar.markdown(MD1)
-
-input_selection = st.sidebar.selectbox('Choose a starting pattern', EXAMPLES_LIST,
-                                       index=0, on_change=on_change_selection, key="my_selection")
-
-EXAMPLES = f"""
-Few possible patterns with 3 colors (GRB for example) that you can select
-
-- **:green[{EXAMPLES_LIST[1]}]** ( 3X3 )
-- **:green[{EXAMPLES_LIST[2]}]** ( 4X4 )
-- **:green[{EXAMPLES_LIST[3]}]** ( 5X5 )
-- **:green[{EXAMPLES_LIST[4]}]** ( 5X5 )
-- **:green[{EXAMPLES_LIST[5]}]** ( 5X5 )
-- **:green[1112T2_1T12T2_..._1TTT2T_1TTT2T]** ( 6X6 )
-"""
-
-st.sidebar.markdown(EXAMPLES)
-
-st.sidebar.markdown(MD2)
-
-with st.form("my_form"):
-    col = st.text_input('Colors', 'GRB', key='my_colors')
-    pat = st.text_input('Pattern', EXAMPLES_LIST[0], key='my_pattern')
-    rotation = st.checkbox("90° rotation", True)
-
-    nb_iter = st.number_input('Number of iterations', value=4, min_value=1, max_value=10, format='%d')
-
-    # Every form has a submit button
-    submitted = st.form_submit_button("Draw")
-    if submitted or first_time:
-        first_time = False
-        img = load_img(pat, col, nb_iter, rotation)
-
-        try:
-            st.write(st.image(img, caption='Generated image'))
-        except StreamlitAPIException as exc:
-            # Currently : streamlit.errors.StreamlitAPIException: `_repr_html_()` is not a valid Streamlit command.
-            if VERBOSE:
-                logger.warning(exc)
-
-    st.markdown("---")
+"""
+Streamlit application
+"""
+import streamlit as st
+from loguru import logger
+
+import lsystog as ls
+
+
+def on_change_selection():
+    """
+    Change the pattern when the starting pattern is changed
+
+    :return: None
+    """
+    current_selection = st.session_state.my_selection
+    st.session_state.my_pattern = current_selection
+
+
+@st.cache_data
+def load_img(pattern, colors, nb_iterations, apply_rotation):
+    """
+    Return an image computed from the parameters
+
+    :return: image
+    """
+    func_transf = ls.strc_2_strc_90 if apply_rotation else None
+    try:
+        gls = ls.Lsystg(axiom=None, rules=None, nbiter=nb_iterations, patterns=[pattern], colors=colors,
+                        banned_colors='/', nb_dest=1, verbose=True, func_transf=func_transf)
+        image = gls.img(img_fpath="", col_fond=(0, 0, 0, 255))
+    except ls.LsystError as ex:
+        st.warning(ex)
+        st.stop()
+    except Exception as ex:
+        st.warning("Please verify your parameters. Special characters are not permitted in the pattern except for '?'")
+        logger.error(f"Something went wrong : {ex}")
+        st.stop()
+    else:
+        return image
+
+
+st.set_page_config(page_title="Gridz", page_icon="🖼️")
+st.markdown("# Gridz")
+
+VERBOSE = False  # Set verbose to true for more printed information
+first_time = True  # At start, no need to click the draw button
+
+MD1 = """
+You have the flexibility to define your own colors and pattern
+
+Simply click on "Draw" when you are satisfied with your new input :sunglasses:
+"""
+
+MD2 = """
+The possible colors are :
+- R : Red
+- G : Green
+- B : Blue
+- W : White
+- K : Black
+- Y : Yellow
+- M : Magenta
+- O : Orange
+- D : Dim gray
+- F : Forest green
+- N : Navy
+- P : Purple
+- T : Background color (black)
+- ? : Random color
+
+The pattern assigns colors from left to right and from top to bottom, with each "row" separated by an underscore
+
+The pattern consists of "rotating" colors represented by digits and fixed colors (refer to the available colors mentioned above)
+
+To understand how the pattern functions, try drawing with just one iteration
+"""
+
+EXAMPLES_LIST = ['00000_01210_02020_01210_00000', '012_120_201', '1001_0220_0220_1001',
+                 '00000_01110_01210_01110_00000', 'T000T_01210_02020_01210_T000T', '00000_01210_02T20_01210_00000',
+                 '1112T2_1T12T2_111222_1TTT2T_1TTT2T_1TTT2T']
+
+st.sidebar.markdown(MD1)
+
+input_selection = st.sidebar.selectbox('Choose a starting pattern', EXAMPLES_LIST,
+                                       index=0, on_change=on_change_selection, key="my_selection")
+
+EXAMPLES = f"""
+Few possible patterns with 3 colors (GRB for example) that you can select
+
+- **:green[{EXAMPLES_LIST[1]}]** ( 3X3 )
+- **:green[{EXAMPLES_LIST[2]}]** ( 4X4 )
+- **:green[{EXAMPLES_LIST[3]}]** ( 5X5 )
+- **:green[{EXAMPLES_LIST[4]}]** ( 5X5 )
+- **:green[{EXAMPLES_LIST[5]}]** ( 5X5 )
+- **:green[1112T2_1T12T2_..._1TTT2T_1TTT2T]** ( 6X6 )
+"""
+
+st.sidebar.markdown(EXAMPLES)
+
+st.sidebar.markdown(MD2)
+
+with st.form("my_form"):
+    col = st.text_input('Colors', 'GRB', key='my_colors')
+    pat = st.text_input('Pattern', EXAMPLES_LIST[0], key='my_pattern')
+    rotation = st.checkbox("90° rotation", True)
+
+    nb_iter = st.number_input('Number of iterations', value=4, min_value=1, max_value=10, format='%d')
+
+    # Every form has a submit button
+    submitted = st.form_submit_button("Draw")
+    if submitted or first_time:
+        first_time = False
+        img = load_img(pat, col, nb_iter, rotation)
+
+        st.image(img, caption='Generated image')
+
+    st.markdown("---")