Created a second tab as a placeholder for next part

app.py

@@ -251,146 +251,154 @@ def shift_slice(state: ViewerState, index: float, delta: int) -> tuple[int, str,
 
 
 def build_demo() -> gr.Blocks:
-    with gr.Blocks(title="STL TIFF Slicer") as demo:
-        gr.Markdown(
-            """
-            # STL to TIFF Slicer
-            Upload up to three STL files, choose a shared layer height and XY pixel size, then generate TIFF stacks for all uploaded models.
-            """
-        )
-
-        with gr.Row():
-            load_samples_button = gr.Button(
-                "Load Sample STLs",
-                variant="secondary",
-                size="sm",
-                min_width=140,
-                scale=0,
+    with gr.Blocks(title="STL TIFF Slicer", css=APP_CSS, head=APP_HEAD) as demo:
+        with gr.Tab("STL to TIFF Slicer"):
+            gr.Markdown(
+                """
+                # STL to TIFF Slicer
+                Upload up to three STL files, choose a shared layer height and XY pixel size, then generate TIFF stacks for all uploaded models.
+                """
             )
 
-        # --- Upload + 3D viewer row ---
-        stl_files: list[gr.File] = []
-        model_viewers: list[gr.Model3D] = []
-        model_details_list: list[gr.Markdown] = []
-
-        with gr.Row():
+            with gr.Row():
+                load_samples_button = gr.Button(
+                    "Load Sample STLs",
+                    variant="secondary",
+                    size="sm",
+                    min_width=140,
+                    scale=0,
+                )
+
+            # --- Upload + 3D viewer row ---
+            stl_files: list[gr.File] = []
+            model_viewers: list[gr.Model3D] = []
+            model_details_list: list[gr.Markdown] = []
+
+            with gr.Row():
+                for i in range(3):
+                    with gr.Column(min_width=250):
+                        stl_file = gr.File(
+                            label=f"STL File {i + 1}",
+                            file_types=[".stl"],
+                            type="filepath",
+                        )
+                        model_viewer = gr.Model3D(
+                            label=f"3D Viewer {i + 1}",
+                            display_mode="solid",
+                            clear_color=(0.94, 0.95, 0.97, 1.0),
+                            height=270,
+                        )
+                        model_details = gr.Markdown(f"No model {i + 1} loaded.")
+                        stl_files.append(stl_file)
+                        model_viewers.append(model_viewer)
+                        model_details_list.append(model_details)
+
+            # --- Shared slicing controls ---
+            with gr.Row():
+                layer_height = gr.Number(label="Layer Height", value=0.1, minimum=0.0001, step=0.01)
+                pixel_size = gr.Number(label="Pixel Size", value=0.05, minimum=0.0001, step=0.01)
+                generate_button = gr.Button("Generate TIFF Stacks", variant="primary")
+
+            # --- Per-object slice browsers ---
+            states: list[gr.State] = []
+            sliders: list[gr.Slider] = []
+            slice_labels: list[gr.Markdown] = []
+            slice_previews: list[gr.Image] = []
+            download_zips: list[gr.File] = []
+
+            with gr.Row():
+                for i in range(3):
+                    with gr.Column(min_width=250):
+                        slice_label = gr.Markdown("No slice stack loaded yet.")
+                        slice_preview = gr.Image(
+                            label=f"Slice Preview {i + 1}",
+                            type="pil",
+                            image_mode="L",
+                            height=270,
+                        )
+                        with gr.Row():
+                            prev_button = gr.Button("\u25c4 Prev", scale=1, min_width=90, size="sm")
+                            next_button = gr.Button("Next \u25ba", scale=1, min_width=90, size="sm")
+                        slice_slider = gr.Slider(
+                            label="Slice Index",
+                            minimum=0,
+                            maximum=0,
+                            value=0,
+                            step=1,
+                            interactive=False,
+                        )
+                        download_zip = gr.File(label=f"Download TIFF ZIP {i + 1}")
+                        state = gr.State(_empty_state())
+
+                        slice_labels.append(slice_label)
+                        slice_previews.append(slice_preview)
+                        sliders.append(slice_slider)
+                        download_zips.append(download_zip)
+                        states.append(state)
+
+                        slice_slider.release(
+                            fn=jump_to_slice,
+                            inputs=[state, slice_slider],
+                            outputs=[slice_label, slice_preview],
+                            queue=False,
+                        )
+                        prev_button.click(
+                            fn=lambda sv, idx: shift_slice(sv, idx, -1),
+                            inputs=[state, slice_slider],
+                            outputs=[slice_slider, slice_label, slice_preview],
+                            queue=False,
+                        )
+                        next_button.click(
+                            fn=lambda sv, idx: shift_slice(sv, idx, 1),
+                            inputs=[state, slice_slider],
+                            outputs=[slice_slider, slice_label, slice_preview],
+                            queue=False,
+                        )
+
+            # --- File upload handlers ---
             for i in range(3):
-                with gr.Column(min_width=250):
-                    stl_file = gr.File(
-                        label=f"STL File {i + 1}",
-                        file_types=[".stl"],
-                        type="filepath",
-                    )
-                    model_viewer = gr.Model3D(
-                        label=f"3D Viewer {i + 1}",
-                        display_mode="solid",
-                        clear_color=(0.94, 0.95, 0.97, 1.0),
-                        height=270,
-                    )
-                    model_details = gr.Markdown(f"No model {i + 1} loaded.")
-                    stl_files.append(stl_file)
-                    model_viewers.append(model_viewer)
-                    model_details_list.append(model_details)
-
-        # --- Shared slicing controls ---
-        with gr.Row():
-            layer_height = gr.Number(label="Layer Height", value=0.1, minimum=0.0001, step=0.01)
-            pixel_size = gr.Number(label="Pixel Size", value=0.05, minimum=0.0001, step=0.01)
-            generate_button = gr.Button("Generate TIFF Stacks", variant="primary")
-
-        # --- Per-object slice browsers ---
-        states: list[gr.State] = []
-        sliders: list[gr.Slider] = []
-        slice_labels: list[gr.Markdown] = []
-        slice_previews: list[gr.Image] = []
-        download_zips: list[gr.File] = []
-
-        with gr.Row():
+                stl_files[i].change(
+                    fn=load_single_model,
+                    inputs=stl_files[i],
+                    outputs=[model_viewers[i], model_details_list[i]],
+                )
+
+            # --- Generate button ---
+            generate_outputs: list = []
             for i in range(3):
-                with gr.Column():
-                    slice_label = gr.Markdown("No slice stack loaded yet.")
-                    slice_preview = gr.Image(
-                        label=f"Slice Preview {i + 1}",
-                        type="pil",
-                        image_mode="L",
-                        height=324,
-                    )
-                    with gr.Row():
-                        prev_button = gr.Button("\u25c4 Prev")
-                        next_button = gr.Button("Next \u25ba")
-                    slice_slider = gr.Slider(
-                        label="Slice Index",
-                        minimum=0,
-                        maximum=0,
-                        value=0,
-                        step=1,
-                        interactive=False,
-                    )
-                    download_zip = gr.File(label=f"Download TIFF ZIP {i + 1}")
-                    state = gr.State(_empty_state())
-
-                    slice_labels.append(slice_label)
-                    slice_previews.append(slice_preview)
-                    sliders.append(slice_slider)
-                    download_zips.append(download_zip)
-                    states.append(state)
-
-                    slice_slider.release(
-                        fn=jump_to_slice,
-                        inputs=[state, slice_slider],
-                        outputs=[slice_label, slice_preview],
-                        queue=False,
-                    )
-                    prev_button.click(
-                        fn=lambda sv, idx: shift_slice(sv, idx, -1),
-                        inputs=[state, slice_slider],
-                        outputs=[slice_slider, slice_label, slice_preview],
-                        queue=False,
-                    )
-                    next_button.click(
-                        fn=lambda sv, idx: shift_slice(sv, idx, 1),
-                        inputs=[state, slice_slider],
-                        outputs=[slice_slider, slice_label, slice_preview],
-                        queue=False,
-                    )
-
-        # --- File upload handlers ---
-        for i in range(3):
-            stl_files[i].change(
-                fn=load_single_model,
-                inputs=stl_files[i],
-                outputs=[model_viewers[i], model_details_list[i]],
+                generate_outputs.extend([
+                    states[i],
+                    sliders[i],
+                    slice_labels[i],
+                    slice_previews[i],
+                    download_zips[i],
+                ])
+
+            preload_outputs: list = []
+            for i in range(3):
+                preload_outputs.extend([
+                    stl_files[i],
+                    model_viewers[i],
+                    model_details_list[i],
+                ])
+
+            load_samples_button.click(
+                fn=preload_sample_models,
+                outputs=preload_outputs,
             )
 
-        # --- Generate button ---
-        generate_outputs: list = []
-        for i in range(3):
-            generate_outputs.extend([
-                states[i],
-                sliders[i],
-                slice_labels[i],
-                slice_previews[i],
-                download_zips[i],
-            ])
-
-        preload_outputs: list = []
-        for i in range(3):
-            preload_outputs.extend([
-                stl_files[i],
-                model_viewers[i],
-                model_details_list[i],
-            ])
-
-        load_samples_button.click(
-            fn=preload_sample_models,
-            outputs=preload_outputs,
-        )
+            generate_button.click(
+                fn=generate_all_stacks,
+                inputs=[stl_files[0], stl_files[1], stl_files[2], layer_height, pixel_size],
+                outputs=generate_outputs,
+            )
 
-        generate_button.click(
-            fn=generate_all_stacks,
-            inputs=[stl_files[0], stl_files[1], stl_files[2], layer_height, pixel_size],
-            outputs=generate_outputs,
-        )
+        with gr.Tab("TIFF Slices to GCode"):
+            gr.Textbox(
+                label="Status",
+                value="More to come later.",
+                interactive=False,
+            )
 
     return demo
 
@@ -399,4 +407,4 @@ demo = build_demo()
 
 
 if __name__ == "__main__":
-    demo.launch(ssr_mode=False, css=APP_CSS, head=APP_HEAD)
+    demo.launch(ssr_mode=False)