Update app.py

app.py

@@ -309,45 +309,6 @@ def navigate(index_change):
 
     st.rerun()
 
-# Function to navigate to specific rows
-def navigate_to_row(index):
-    if 0 <= index < len(st.session_state.data):
-        st.session_state.current_index = index
-        # only works consistently if done before rerun
-        js = '''
-        <script>
-            var body = window.parent.document.querySelector(".main");
-            
-            body.scrollTop = 0;
-            window.scrollY = 0;
-        </script>
-        '''
-        st.components.v1.html(js, height=0)
-        # https://discuss.streamlit.io/t/click-twice-on-button-for-changing-state/45633/2
-    
-        # disable text input enter to submit
-        # https://discuss.streamlit.io/t/text-input-how-to-disable-press-enter-to-apply/14457/6
-        components.html(
-            """
-            <script>
-            const inputs = window.parent.document.querySelectorAll('input');
-            inputs.forEach(input => {
-                input.addEventListener('keydown', function(event) {
-                    if (event.key === 'Enter') {
-                        event.preventDefault();
-                    }
-                });
-            });
-            </script>
-            """,
-            height=0
-        )
-    
-        #st.rerun()
-    else:
-        st.error("Index out of range.")
-
-
 def show_field(f: Field, index: int, data_collected):
     if f.type not in INPUT_FIELD_DEFAULT_VALUES.keys():
         st.session_state.following_mandatory = False
@@ -594,25 +555,57 @@ else:
 if st.session_state.current_index > 0:
         if st.button("Previous"):
             navigate(-1)
-#if st.button("Last edited instance"):
-#        go_to_index = get_start_index()
-#        navigate_to_row(go_to_index)
 
 if 0 <= st.session_state.current_index < len(st.session_state.data):
     st.write(f"Page {st.session_state.current_index + 1} out of {len(st.session_state.data)}")
 
+# Function to navigate to specific rows
+#def navigate_to_row(index):
+#    if 0 <= index < len(st.session_state.data):
+#        st.session_state.current_index = index
+#        # only works consistently if done before rerun
+#        js = '''
+#        <script>
+#            var body = window.parent.document.querySelector(".main");
+#            
+#            body.scrollTop = 0;
+#            window.scrollY = 0;
+#        </script>
+#        '''
+#        st.components.v1.html(js, height=0)
+#        # https://discuss.streamlit.io/t/click-twice-on-button-for-changing-state/45633/2
+#    
+#        # disable text input enter to submit
+#        # https://discuss.streamlit.io/t/text-input-how-to-disable-press-enter-to-apply/14457/6
+#        components.html(
+#            """
+#            <script>
+#            const inputs = window.parent.document.querySelectorAll('input');
+#            inputs.forEach(input => {
+#                input.addEventListener('keydown', function(event) {
+#                    if (event.key === 'Enter') {
+#                        event.preventDefault();
+#                    }
+#                });
+#            });
+#            </script>
+#            """,
+#            height=0
+#        )
+#    
+#        st.rerun()
+#    else:
+#        st.error("Index out of range.")
 def navigate_to_index():
     try:
-        go_to_index = int(st.session_state.go_to)-1
-        last_index = get_start_index()
+        go_to_index = st.session_state.current_index - int(st.session_state.go_to)
+        go_back_by = st.session_state.current_index - go_to_index
         # Check if the index is within the valid range
-        if go_to_index > last_index:
-            st.info(f"You have not annotated instance {go_to_index+1} yet!   Go to last edited instance.")
-        elif 0 <= go_to_index < len(st.session_state.data):
+        if 0 <= go_back_by < len(st.session_state.data):
+            navigate_to_row(-1*int(go_back_by))
             st.session_state.go_to = 0
-            navigate_to_row(go_to_index)
         else:
-            st.info(f"{go_to_index} is not in the range of data.")
+            st.info(f"{st.session_state.go_to} is not in the range of data.")
     except ValueError:
         st.error("The page number must be an integer.")
 
@@ -621,8 +614,8 @@ with col2:
     with st.form(key="nav_form"):
         st.number_input("Go to Page: ", key="go_to", format="%.0f")
         st.form_submit_button("Go", on_click=navigate_to_index)
-        go_to_index = get_start_index()
-        st.form_submit_button("Direct to last updated instance", on_click=navigate_to_row(go_to_index))
+#        go_to_index = get_start_index()
+#        st.form_submit_button("Direct to last updated instance", on_click=navigate_to_row(go_to_index))
 
 st.markdown(
     """<style>