app.py

import gradio as gr
import gradio.themes
import numpy as np
from style import js_func, css_func
import tempfile
import pandas as pd
from shared_functions import greet, calculator, sepia, download_text, download_csv

from greeting_tab import greeting_tab
from calculator_tab import calculator_tab
from sepia_tab import sepia_tab
from space_loader_tab import gr_load_tab, iframe_loader_tab

import json
print("Gradio version:", gradio.__version__)

theme = gr.Theme.from_hub("LPX55/modal_ai")

with gr.Blocks(theme=theme, js=js_func, css=css_func) as demo:
    show_space_tab = gr.State(False)
    # Iframe lazy load pattern
    heavy_iframe_src = gr.State("")
    with gr.Tab("Heavy Space (iframe - lazy load)", visible=False) as heavy_iframe_tab:
        iframe_html = gr.HTML("")
        close_btn = gr.Button("Close Tab")
        def close_heavy_iframe_tab():
            return gr.Tab(visible=False), ""
        close_btn.click(fn=close_heavy_iframe_tab, outputs=[heavy_iframe_tab, iframe_html])
    def open_heavy_iframe_tab():
        src = '<iframe src="https://lpx55-sam2-1-image-predictor-masking-tool-cpu.hf.space" width="100%" height="800" style="border:none;"></iframe>'
        return gr.Tab(visible=True), src
    # Iframe always loaded pattern
    with gr.Tab("Heavy Space (iframe - always loaded)", visible=False) as heavy_iframe_always_tab:
        gr.HTML('<iframe src="https://lpx55-sam2-1-image-predictor-masking-tool-cpu.hf.space" width="100%" height="800" style="border:none;"></iframe>')
        close_btn2 = gr.Button("Close Tab")
        def close_heavy_iframe_always_tab():
            return gr.Tab(visible=False)
        close_btn2.click(fn=close_heavy_iframe_always_tab, outputs=heavy_iframe_always_tab)
    def open_heavy_iframe_always_tab():
        return gr.Tab(visible=True)

    with gr.Sidebar(width="25vw"):
        gr.Markdown("""
        # 🤖 API + MCP Demo
        _Dynamically load tabs 🤫_

        ---
        **Ways to load the remote SAM2.1 Masking Tool:**
        - **gr.load()**: Loads the remote interface at startup, just hidden until shown.
        - **iframe**: Loads the remote UI only when you click the button (no API integration).
        - **API Proxy**: Upload an image, and the backend will call the remote Space's API and show the result.
        - **Open in New Tab**: Opens the remote Space in a new browser tab.
        ---
        **Navigation**
        - [Greeting](#greeting)
        - [Calculator](#calculator)
        - [Sepia Image](#sepia-image)
        - [Custom IFrame Loader](#custom-iframe-loader)
        - [Space Loader](#space-loader)
        ---
        ### [GitHub Repo](https://github.com/yourrepo) | [Docs](https://yourdocs)
        ---
        **Tips:**  
        - Try the examples in each tab!
        - Download your results with the button on the right.
        """)
        gr.Code(
          """from gradio_client import Client
client = Client("YOUR_URL")
print(client.predict("Alex", 5, False, api_name="/greet"))
          
          """, language="python", label="**API Example:**"
        )
        gr.Button("Reset All", elem_id="reset-btn")
        load_space_btn = gr.Button("Load Extra Space", elem_id="load-space-btn")
        load_sam_btn = gr.Button("Load SAM2.1 Masking Tool (gr.load)", elem_id="load-sam-btn")
        load_sam_iframe_btn = gr.Button("Load SAM2.1 Masking Tool (iframe)", elem_id="load-sam-iframe-btn")
        load_sam_api_btn = gr.Button("Load SAM2.1 Masking Tool (API Proxy)", elem_id="load-sam-api-btn")
        open_sam_tab_btn = gr.Button("Open SAM2.1 Masking Tool in New Tab", elem_id="open-sam-tab-btn")
        open_heavy_iframe_btn = gr.Button("Open Heavy Space (iframe - lazy load)")
        open_heavy_iframe_btn.click(fn=open_heavy_iframe_tab, outputs=[heavy_iframe_tab, iframe_html])
        open_heavy_iframe_always_btn = gr.Button("Open Heavy Space (iframe - always loaded)")
        open_heavy_iframe_always_btn.click(fn=open_heavy_iframe_always_tab, outputs=heavy_iframe_always_tab)

    # All tabs grouped together for a unified tab bar
    shared_state = gr.State({"greeting": None, "calculation": None})
    shared_state_box = gr.JSON(label="Shared Data Between Tabs")
    def pretty_json(state):
        return json.dumps(state, indent=2, ensure_ascii=False)

    with gr.Tab("Greeting"):
        name = gr.Textbox(label="Name", info="Enter your name", placeholder="e.g. Alex")
        intensity = gr.Slider(1, 20, value=3, step=1, label="Intensity", info="How excited should the greeting be?")
        with gr.Accordion("Advanced Options", open=False):
            exclaim = gr.Checkbox(label="Shout (all caps)", info="Make the greeting all uppercase and add exclamations")
        greet_btn = gr.Button("Greet")
        greet_output = gr.Textbox(label="Greeting", lines=2)
        download_greet_btn = gr.DownloadButton(label="Download Greeting", value=download_text, inputs=greet_output)
        gr.Examples(
            [["Jill", 1, False], ["Sam", 3, True], ["Alex", 5, False]],
            inputs=[name, intensity, exclaim],
            outputs=greet_output,
            fn=greet
        )
        def update_greeting_state(greeting, state):
            state = dict(state)
            state["greeting"] = greeting
            return state
        greet_btn.click(greet, [name, intensity, exclaim], greet_output).then(update_greeting_state, [greet_output, shared_state], shared_state)

    with gr.Tab("Calculator"):
        num1 = gr.Number(label="Number 1", info="First number")
        operation = gr.Radio(["add", "subtract", "multiply", "divide"], label="Operation", info="Choose the operation")
        num2 = gr.Number(label="Number 2", info="Second number")
        calc_btn = gr.Button("Calculate")
        calc_output = gr.Number(label="Result")
        download_calc_btn = gr.DownloadButton(label="Download Result", value=download_csv, inputs=calc_output)
        gr.Examples(
            [[45, "add", 3], [3.14, "divide", 2], [144, "multiply", 2.5], [0, "subtract", 1.2]],
            inputs=[num1, operation, num2],
            outputs=calc_output,
            fn=calculator
        )
        def update_calc_state(result, state):
            state = dict(state)
            state["calculation"] = result
            return state
        calc_btn.click(calculator, [num1, operation, num2], calc_output).then(update_calc_state, [calc_output, shared_state], shared_state)

    with gr.Tab("Sepia Image"):
        sepia_tab()
    # with gr.Tab("Space Loader (gr.load)"):
    #     gr_load_tab()
    with gr.Tab("Space Loader (iframe)"):
        iframe_loader_tab()
    with gr.Tab("Extra Space", visible=False) as extra_space_tab:
        gr.Markdown("## External Gradio Space")
        gr.HTML('<iframe src="https://huggingface.co/spaces/gradio/calculator" width="100%" height="600" style="border:none;"></iframe>')
        close_btn = gr.Button("Close Tab")
        def close_tab():
            return gr.Tab(visible=False)
        close_btn.click(fn=close_tab, outputs=extra_space_tab)
    with gr.Tab("Custom IFrame Loader") as custom_iframe_tab:
        gr.Markdown("## Load Any IFrame URL")
        custom_url = gr.Textbox(label="IFrame URL", placeholder="https://example.com")
        load_custom_iframe_btn = gr.Button("Load IFrame")
        custom_iframe = gr.HTML(visible=True)
        def load_custom_iframe(url):
            if not url:
                return "<div style='color:red'>Please enter a URL.</div>"
            return f'<iframe src="{url}" width="100%" height="800" style="border:none;"></iframe>'
        load_custom_iframe_btn.click(fn=load_custom_iframe, inputs=custom_url, outputs=custom_iframe)
        close_btn = gr.Button("Close Tab")
        def close_tab_custom():
            return gr.Tab(visible=False)
        close_btn.click(fn=close_tab_custom, outputs=custom_iframe_tab)

    # Add state variables for each dynamic tab
    extra_space_open = gr.State(True)
    sam_tab_open = gr.State(True)
    sam_iframe_tab_open = gr.State(True)
    sam_api_tab_open = gr.State(True)
    custom_iframe_tab_open = gr.State(True)

    def show_tab():
        return gr.Tab(visible=True)

    load_space_btn.click(fn=show_tab, outputs=[extra_space_tab])

    def show_sam_api_tab():
        return gr.Tab(visible=True)

    def open_in_new_tab():
        # This function does nothing server-side, but the button will have a link
        pass

    open_sam_tab_btn.click(fn=open_in_new_tab, inputs=None, outputs=None, js="window.open('https://lpx55-sam2-1-image-predictor-masking-tool-cpu.hf.space', '_blank')")

    shared_state.change(pretty_json, shared_state, shared_state_box)

demo.queue(default_concurrency_limit=2, max_size=10).launch(mcp_server=True)