How do I make a message/info/error box?

[hoffstadt]

Answer

There are several ways you could make your own message box. Most will follow a pattern similar to the example below. This example demonstrates a function that creates a centered modal popup window that is destroyed after the user makes a selection.

Example

import dearpygui.dearpygui as dpg

dpg.create_context()
dpg.create_viewport()
dpg.setup_dearpygui()

def show_info(title, message, selection_callback):

    # guarantee these commands happen in the same frame
    with dpg.mutex():

        viewport_width = dpg.get_viewport_client_width()
        viewport_height = dpg.get_viewport_client_height()

        with dpg.window(label=title, modal=True, no_close=True) as modal_id:
            dpg.add_text(message)
            with dpg.group(horizontal=True):
                dpg.add_button(label="Ok", width=75, user_data=(modal_id, True), callback=selection_callback)
                dpg.add_button(label="Cancel", width=75, user_data=(modal_id, False), callback=selection_callback)

    # guarantee these commands happen in another frame
    dpg.split_frame()
    width = dpg.get_item_width(modal_id)
    height = dpg.get_item_height(modal_id)
    dpg.set_item_pos(modal_id, [viewport_width // 2 - width // 2, viewport_height // 2 - height // 2])


def on_selection(sender, unused, user_data):

    if user_data[1]:
        print("User selected 'Ok'")
    else:
        print("User selected 'Cancel'")

    # delete window
    dpg.delete_item(user_data[0])


with dpg.window(label="Example"):
    dpg.add_button(label="Open Messagebox", callback=lambda:show_info("Message Box", "Do you wish to proceed?", on_selection))


# main loop
dpg.show_viewport()
while dpg.is_dearpygui_running():
    dpg.render_dearpygui_frame()  

dpg.destroy_context()

Resources

• Popups
• Deleting Items
• Mutex
• Frames

Reusable Code

def show_info(title, message, selection_callback):

    # guarantee these commands happen in the same frame
    with dpg.mutex():

        viewport_width = dpg.get_viewport_client_width()
        viewport_height = dpg.get_viewport_client_height()

        with dpg.window(label=title, modal=True, no_close=True) as modal_id:
            dpg.add_text(message)
            dpg.add_button(label="Ok", width=75, user_data=(modal_id, True), callback=selection_callback)
            dpg.add_same_line()
            dpg.add_button(label="Cancel", width=75, user_data=(modal_id, False), callback=selection_callback)

    # guarantee these commands happen in another frame
    dpg.split_frame()
    width = dpg.get_item_width(modal_id)
    height = dpg.get_item_height(modal_id)
    dpg.set_item_pos(modal_id, [viewport_width // 2 - width // 2, viewport_height // 2 - height // 2])

with dpg.window(label="Example"):
    dpg.add_button(label="Open Messagebox", callback=lambda:show_info("Message Box", "Do you wish to proceed?", on_selection))