Update app2.py

app2.py

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+import panel as pn
+
+
+
+# Create buttons for the toggleable sidebar
+button1 = pn.widgets.Button(icon='home', name="Home", icon_size='1.5em', button_type = 'primary', button_style = 'outline', width = 140)
+button2 = pn.widgets.Button(icon='file-analytics', name='My papers', icon_size='1.5em', button_type = 'primary', button_style = 'outline', width = 140)
+button3 = pn.widgets.Button(icon='settings', icon_size='1.5em', name='Settings', button_type = 'primary', button_style = 'outline', width = 140)
+
+# Create a column layout for the buttons inside the toggleable sidebar
+buttons = pn.Column(button1, button2, button3 , css_classes=['hidden'])
+
+instructions = """
+## Modified-gravity wormholes without exotic matter
+### Tiberiu Harko, Francisco S. N. Lobo, M. K. Mak, and Sergey V. Sushkov
+A fundamental ingredient in wormhole physics is the flaring-out condition at the throat which,
+in classical general relativity, entails the violation of the null energy condition. In this work, we
+present the most general conditions.....
+"""
+
+instructions2 = """
+## Viability of Bouncing Cosmology in Energy-Momentum-Squared
+### Ahmed H. Barbar, Adel M. Awad, and Mohammad T. AlFiky
+We analyze the early-time isotropic cosmology in the so-called energy-momentum-squared gravity
+(EMSG). In this theory, a FORMATAÇAO term is added to the Einstein-Hilbert action, which has been
+shown to replace the initial singularity by a regular bounce. We show that this is not the case,
+and the bouncing solution obtained does.....
+"""
+
+text = pn.pane.Markdown(instructions)
+text2 = pn.pane.Markdown(instructions2)
+
+# List to store the entered options
+entered_options = [
+    "Astrophysics",
+    "Condensed Matter",
+    "Mathematical Physics",
+    "Nuclear Experiment"
+]
+
+# Create buttons for the header
+header_buttons = pn.Row(sizing_mode='stretch_width', css_classes=['header-buttons'])
+
+# "+" button to trigger the addition to the header
+add_to_header_button = pn.widgets.Button(name="", icon='search', icon_size='1.5em', button_style = 'outline',button_type = 'light')
+
+# List to store the names of buttons to be added to the header
+buttons_to_add = []
+
+# Callback for adding selected options to the list
+def add_to_header(event):
+    selected_options = filter_list.value
+    if selected_options:
+        for option in selected_options:
+            if option not in buttons_to_add:  # Check if option is already in header
+                buttons_to_add.append(option)  # Add to header if not already present
+        filter_list.value = []  # Clear the selected options after adding them to the header
+        update_header()  # Update the header after adding options
+
+add_to_header_button.on_click(add_to_header)
+
+# Function to update the header layout with the newly created buttons
+def update_header():
+    header_buttons.clear()  # Clear the existing buttons
+    for button_name in buttons_to_add:
+        header_button = pn.widgets.Button(name=button_name, button_type = 'primary', button_style = 'outline')
+        header_button.on_click(remove_from_header)  # Add callback to remove the header button
+        header_buttons.append(header_button)
+        
+    # Update the filter list options to exclude buttons that are already in the header
+    filter_list.options = [option for option in entered_options if option not in buttons_to_add]
+
+# MultiChoice widget to display the filter options with delete buttons
+filter_list = pn.widgets.MultiChoice(
+    name='',
+    value=[],
+    options=entered_options,
+    margin=(20, 10),
+    sizing_mode='fixed',
+    solid=False,
+    styles={'background': '#f0f0f0'},
+    placeholder="Search Topics"
+)
+
+# Callback to remove the clicked header button
+def remove_from_header(event):
+    button = event.obj  # Get the clicked button
+    if button.name in buttons_to_add:
+        buttons_to_add.remove(button.name)  # Remove from the header buttons list
+        filter_list.options.append(button.name)  # Add back to the filter list options
+    update_header()  # Update the header and filter list
+
+# Layout using Template
+template = pn.template.FastListTemplate(
+    title="EasySciRead",
+    header=[pn.Row(header_buttons, width=800, sizing_mode='fixed'), pn.Row(filter_list, width=250), pn.Row(add_to_header_button, width=55)],
+    main=[
+        # First row of the grid
+        pn.Row(pn.pane.Markdown("# Cosmology"),
+            pn.Column(text, text2, sizing_mode='stretch_width'),
+            pn.Column(text2, text, sizing_mode='stretch_width'),
+            sizing_mode='stretch_width',
+        ),
+        # Second row of the grid
+        pn.Row(pn.pane.Markdown("# Astrophysics"),
+            pn.Column(text, text2, sizing_mode='stretch_width'),
+            sizing_mode='stretch_width',
+        ),
+    ],
+    sidebar=[buttons],
+    accent_base_color="#88d8b0",
+    header_background="#FFFFFF",
+    header_color="#000000",
+    text_align='center',
+    sidebar_width=150
+)
+
+
+def run_code(event):
+    # Add your desired Python code here
+    # For example, let's print "Hello, Panel!" when the button is clicked
+    print("Hello, Panel!", flush = True)
+
+
+# Attach the function to the button's on_click event
+button3.on_click(run_code)
+
+# Run the app
+template.servable()