A single way to override the back button behavior

Description

Right now, on both Xamarin Forms and Maui, there is no direct way to override the navbar back button behavior, while you can with phisical/software buttons (on android only) using the OnBackButtonPressed method.

I suggest to add on the Page (or even NavigationPage) a property to Enable or Disable the back button (be it on the navbar or phisical) and an overridable method/event to capture the back button when is pressed (regardless of the type/platform) similar on how someone did in this tutorial

Public API Changes

var page = new ContentPage();
page.IsBackButtonEnabled  = false; // It should be a dependency property for it being able to be binded
page.OnBackPressed += BackPressed; 
// or overriding it like it is at the moment but also including the navbar back button
// Also, why not a Command like BackPressedCommand to make it work better with MVVM?

Intended Use-Case

Right now you are not able to properly control how the user uses the back button without heavy customization

[Pastajello]

@nielstoemen What If Im not using Shell but some other framework? Im checking out Prism.MAUI and for ContentPage I cant get <Shell.BackButtonBehavior> to work. Guess because Im not using Shell. Are developer forced to implement this on their own if not using Shell? 😦

Ah ok. Im not sure if this should go here or to some MAUI discussion but funnsy stuff. I created a class based on NavigationPage and used it in navigation. Then suddenly somehow ContentPage.OnBackButtonPressed started catching Toolbar back button on Android. Huh.

[nielstoemen]

https://learn.microsoft.com/en-us/dotnet/maui/fundamentals/shell/navigation?view=net-maui-7.0#back-button-behavior

i see, it worked when i posted it. you have to copy paste the link in the browser when you click on it github does weird things. don’t know the reason