Create app.py (#1)

- Create app.py (50e0f31ac38ab1b8b72979d316bfe47a870dfdf8)

app.py

@@ -0,0 +1,72 @@
+import gradio as gr
+
+def load_images(files):
+    if not files:
+        return [], gr.update(visible=False), 0, ""
+    
+    # Sort alphabetically by file name (handles imageA, imageB, image1, image2)
+    sorted_files = sorted(files, key=lambda x: x.name)
+    
+    # Return the sorted list, make the carousel visible, 
+    # set index to 0, and update the display
+    return sorted_files, gr.update(visible=True), 0, sorted_files[0].name
+
+def navigate(direction, current_index, file_list):
+    if not file_list:
+        return 0, None, ""
+    
+    # Calculate new index with wrap-around logic
+    new_index = (current_index + direction) % len(file_list)
+    active_file = file_list[new_index]
+    
+    return new_index, active_file.name, active_file.name
+
+with gr.Blocks(theme=gr.themes.Soft()) as demo:
+    gr.Markdown("# 🖼️ Sequential Image Carousel")
+    
+    # State to keep track of the uploaded files and current position
+    file_state = gr.State([])
+    index_state = gr.State(0)
+
+    # 1. Upload Section
+    with gr.Row():
+        upload_btn = gr.File(
+            label="Upload Images", 
+            file_count="multiple", 
+            file_types=["image"]
+        )
+
+    # 2. Carousel Section (Hidden until images are uploaded)
+    with gr.Column(visible=False) as carousel_container:
+        with gr.Row():
+            prev_btn = gr.Button("⬅️ Previous", scale=1)
+            # Display area for the single image
+            image_display = gr.Image(label="Viewing Image", interactive=False, scale=4)
+            next_btn = gr.Button("Next ➡️", scale=1)
+        
+        image_name_label = gr.Markdown(elem_id="img-label")
+
+    # --- Event Listeners ---
+
+    # When files are uploaded: Sort them and show the first one
+    upload_btn.upload(
+        fn=load_images,
+        inputs=upload_btn,
+        outputs=[file_state, carousel_container, index_state, image_display]
+    )
+
+    # Navigation Buttons
+    prev_btn.click(
+        fn=lambda idx, files: navigate(-1, idx, files),
+        inputs=[index_state, file_state],
+        outputs=[index_state, image_display, image_name_label]
+    )
+
+    next_btn.click(
+        fn=lambda idx, files: navigate(1, idx, files),
+        inputs=[index_state, file_state],
+        outputs=[index_state, image_display, image_name_label]
+    )
+
+if __name__ == "__main__":
+    demo.launch()