fix slider

app.py

@@ -112,14 +112,6 @@ def process(width:int, height:int, scale:float, image: np.ndarray):
     figure = packer.visualize()
     return [figure, packer.total]
 
-def update_scale(width:int, height:int, image: np.ndarray):
-    global maxScale
-
-    widthImage, heightImage = image.shape[:2]
-    maxScale = int((width/widthImage + height/heightImage)/2)
-    return
-
-maxScale = 10
 if __name__ == "__main__":
     with gr.Blocks() as demo:
         gr.Markdown(
@@ -129,6 +121,7 @@ if __name__ == "__main__":
             """
         )
 
+        maxScale = gr.State(value=1.0)
         with gr.Row():
             with gr.Column():
                 image = gr.Image(image_mode="RGBA")
@@ -141,8 +134,14 @@ if __name__ == "__main__":
             with gr.Column():
                 plot_output = gr.Plot()
                 total = gr.Number(label="Total")
-        image.change(fn=update_scale, inputs=[width, height, image], outputs=None)
-        fit.click(fn=process, inputs=[width, height, scale, image], outputs=[plot_output, total])
+                
+        def update_scale(width:int, height:int, image: np.ndarray):
+
+            widthImage, heightImage = image.shape[:2]
+            maxScale = int((width/widthImage + height/heightImage)/2)
+            return maxScale
+        image.change(fn=update_scale, inputs=[width, height, image], outputs=maxScale)
+        fit.click(fn=process, inputs=[width, height, scale, maxScale, image], outputs=[plot_output, total])
         
 
     demo.launch()