Update app.py

app.py

@@ -104,6 +104,14 @@ def load_sample_pdf():
     return SAMPLE_PDF
 
 
+# ---------- Helper: PDF Preview ----------
+def preview_pdf(file):
+    if file is None:
+        return "<div style='color:gray;'>No PDF uploaded</div>"
+    path = file.name if hasattr(file, "name") else file
+    return f'<iframe src="{path}" width="100%" height="600px"></iframe>'
+
+
 # ---------- Gradio UI ----------
 with gr.Blocks(theme=simple_theme, title=APP_TITLE) as interface:
     gr.HTML(f"""
@@ -124,7 +132,7 @@ with gr.Blocks(theme=simple_theme, title=APP_TITLE) as interface:
 
         # Right Side (Preview + Output)
         with gr.Column(scale=2):
-            pdf_preview = gr.File(label="📑 Preview Uploaded PDF", interactive=False)
+            pdf_preview = gr.HTML(label="📑 PDF Preview")
             output_md = gr.Markdown(
                 label="Validation Report",
                 value="<div style='border:2px solid #1e40af; border-radius:12px; padding:15px; background-color:#f0f9ff;'>📄 Upload a PDF and click <b>Run Validation</b> to start.</div>",
@@ -133,7 +141,7 @@ with gr.Blocks(theme=simple_theme, title=APP_TITLE) as interface:
     # ---------- Button Events ----------
     # Sample PDF click
     sample_btn.click(
-        fn=lambda: (load_sample_pdf(), load_sample_pdf()),
+        fn=lambda: (load_sample_pdf(), preview_pdf(load_sample_pdf())),
         inputs=[],
         outputs=[pdf_upload, pdf_preview]
     )
@@ -147,7 +155,7 @@ with gr.Blocks(theme=simple_theme, title=APP_TITLE) as interface:
 
     # Preview PDF when uploaded
     pdf_upload.change(
-        fn=lambda f: f.name if f else None,
+        fn=preview_pdf,
         inputs=pdf_upload,
         outputs=pdf_preview
     )
@@ -167,12 +175,6 @@ if __name__ == "__main__":
 
 
 
-
-
-
-
-
-
 # import os
 # import gradio as gr
 # import json