How to get a return value from AlertDialog that is not a page item?

[M0hawke]

Question

I have the model AlertDialog example from docs and created a file save dialog that works perfectly. I need to popup the alert if a file exists asking to overwrite or not. I cannot figure out how to return a value from the ok button. I tried several things, including globals, but have yet to find a solution. Any advice? Thank you!

Code sample

# *** Add popup.   
    def open(e):
        page.dialog = dlg_modal
        dlg_modal.open = True
        page.update()
                
    def close_dlg(e):
        dlg_modal.open = False
        page.update()
    
    def yes_click(e):
        dlg_modal.open = False
        page.update()
        
    dlg_modal = ft.AlertDialog(
        modal=True,
        title=ft.Text("Please confirm"),
        content=ft.Text("Overwrite?"),
        actions=[
            ft.TextButton("No", on_click=close_dlg),
            ft.TextButton("Yes", on_click=yes_click),
        ],
        actions_alignment=ft.MainAxisAlignment.END,
        on_dismiss=lambda e: print("closed"),
    )
    
    # *** Add floating button for saving. ***
    page.floating_action_button = ft.FloatingActionButton(
        icon=ft.icons.SAVE_ALT_ROUNDED,  
        bgcolor=ft.colors.PINK_900,
        tooltip="Export as PDF?",
        width=35,
        height=35,
        on_click=lambda _: export_dialog.save_file(allowed_extensions=["md","html"],file_name="Untitled.md"),
    )
    
    # *** Add file save dialog and actions. ***
    def export_file(e: ft.FilePickerResultEvent):
    
        if len(MarkDownOutput.value) > 0:
            if '.' not in e.path:
                page.snack_bar = ft.SnackBar(ft.Text(f"Please provide a proper filename. You can save as .md or .html."),
                                            bgcolor=ft.colors.PINK_100)
                page.snack_bar.open = True
            else:
                if os.path.exists(e.path):
                    
                    page.dialog = dlg_modal
                    dlg_modal.open = True

                    if yes do this else no do nothing...

Error message

N/A

------------------------------------------------------

• I have searched for answers to my question both in the issues and in previous discussions.

[M0hawke]

I created a class and handed the path and save data to it. I do the save, or not, from the class, else just save normally within the main method.