Support enter key submit

app.py

@@ -148,10 +148,11 @@ with gr.Blocks() as demo:
     gr.Markdown("## 2. Ask a question")
 
     with gr.Row(equal_height=True):
-        # NOTE: When https://github.com/gradio-app/gradio/issues/2103 is resolved,
-        # we can support enter-key submit
         question = gr.Textbox(
-            label="Question", placeholder="e.g. What is the invoice number?"
+            label="Question",
+            placeholder="e.g. What is the invoice number?",
+            lines=1,
+            max_lines=1,
         )
         model = gr.Radio(
             choices=list(CHECKPOINTS.keys()),
@@ -176,16 +177,21 @@ with gr.Blocks() as demo:
     upload.change(fn=process_upload, inputs=[upload], outputs=[document, image, output])
     url.change(fn=process_path, inputs=[url], outputs=[document, image, output])
 
+    question.submit(
+        fn=process_question,
+        inputs=[question, document, model],
+        outputs=[image, output],
+    )
+
     submit_button.click(
         process_question,
         inputs=[question, document, model],
         outputs=[image, output],
     )
 
-    # This is handy but commented out for now because we can't "auto submit" questions either
-    # model.change(
-    #    process_question, inputs=[question, document, model], outputs=[image, output]
-    # )
+    model.change(
+        process_question, inputs=[question, document, model], outputs=[image, output]
+    )
 
     example_image.change(
         fn=load_example_document,
@@ -194,10 +200,12 @@ with gr.Blocks() as demo:
     )
 
     gr.Markdown("### More Info")
-    gr.Markdown("DocQuery uses LayoutLMv1 fine-tuned on DocVQA, a document visual question"
-    " answering dataset, as well as SQuAD, which boosts its English-language comprehension."
-    " To use it, simply upload an image or PDF, type a question, and click 'submit', or "
-    " click one of the examples to load them.")
+    gr.Markdown(
+        "DocQuery uses LayoutLMv1 fine-tuned on DocVQA, a document visual question"
+        " answering dataset, as well as SQuAD, which boosts its English-language comprehension."
+        " To use it, simply upload an image or PDF, type a question, and click 'submit', or "
+        " click one of the examples to load them."
+    )
     gr.Markdown("[Github Repo](https://github.com/impira/docquery)")
 
 if __name__ == "__main__":