Widget to fill parent window width

[retifrav]

Is there a way to set child widget width to fill all the available parent width? For example, for a text input to have the width of its parent window?

I figured that I can query the window width inside render loop and assign this value to the widget of interest (minus double window padding and scrollbar size) on every iteration:

while dpg.is_dearpygui_running():
    windowWidth = dpg.get_item_width("windowID")
    dpg.set_item_width(
        "textInputID",
        windowWidth - (8 * 2 + 14) # better to get these variables from the theme
    )
    dpg.render_dearpygui_frame()

Is that the way? Seems like a bit of an overkill.

Additionally, is there a variable/flag to check whether window's scrollbar is not visible/shown, so there is no need to subtract its width?

[JKHans]

Hi @retifrav,

What you are looking for is width=-1

By the way, the same applies to height=-1, but not all widgets support that size policy.

dpg.add_input_text(default_value="Input text using full parent width", width=-1)

Please also have a look to the dearpygui integrated demo (Layout & Scrolling):

import dearpygui.demo as dpd
...
dpd.show_demo()

It seems that up to now, nowhere else in the documentation this "-1" size policy is mentioned explicitly.