After creating a pop up window, how to set all other widgets to be non-interactive

[asingingbird]

For instance, in the file_dialog example, when I clicked the Open file button to choose a file, I want the whole UI to become unclickable except for the file chooser dialog.

In fact, many apps do that, when a dialog pops up, the rest of the UI just becomes non-interactive, and if the user clicks on it, it blinks, bells and refuses to act on it.

Does egui have this feature now and how to do that ?

[asingingbird]

In the file_dialog example, after the Open file button was clicked, the UI did become kind of non-interactive because the update method was blocked on picking a file, yet it's still resizable and can be minimized, maximized and closed, and more importantly the UI was not acting correctly, for example the extend area turned black when resizing the window.

[emilk]

This is known as "modal" windows/dialogs, and has not yet been added to egui: #686