[Sergio0694]

Closes #117

This PR generates OnPropertyChanging and OnPropertyChanged partial methods for [ObservableProperty].

FYI @sonnemaf

Example code

namespace MyProject.ViewModels;

public partial class MyViewModel
{
    [ObservableProperty]
    private string? name;
}

Generated code

// <auto-generated/>
#pragma warning disable
#nullable enable
namespace MyProject.ViewModels
{
    partial class MyViewModel
    {
        [global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.ObservablePropertyGenerator", "8.0.0.0")]
        [global::System.Diagnostics.DebuggerNonUserCode]
        [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage]
        public string? Name
        {
            get => name;
            set
            {
                if (!global::System.Collections.Generic.EqualityComparer<string?>.Default.Equals(name, value))
                {
                    OnNameChanging(value);
                    OnPropertyChanging(global::CommunityToolkit.Mvvm.ComponentModel.__Internals.__KnownINotifyPropertyChangingArgs.Name);
                    name = value;
                    OnNameChanged(value);
                    OnPropertyChanged(global::CommunityToolkit.Mvvm.ComponentModel.__Internals.__KnownINotifyPropertyChangedArgs.Name);
                }
            }
        }

        /// <summary>Executes the logic for when <see cref="Name"/> is changing.</summary>
        [global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.ObservablePropertyGenerator", "8.0.0.0")]
        partial void OnNameChanging(string? value);
        /// <summary>Executes the logic for when <see cref="Name"/> just changed.</summary>
        [global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.ObservablePropertyGenerator", "8.0.0.0")]
        partial void OnNameChanged(string? value);
    }
}

[michael-hawker]

@Sergio0694 in your comment above on the PR:

        /// <summary>Executes the logic for when <see cref="Name"/> is changing.</summary>
        [global::System.CodeDom.Compiler.GeneratedCode("CommunityToolkit.Mvvm.SourceGenerators.ICommandGenerator", "8.0.0.0")]
        

Should it be IPropertyChangeGenerator vs. ICommandGenerator? I guess I'm not sure what this generatedcode attribute is for?

[Sergio0694]

@michael-hawker Whoops, good catch! 😄
Fixed in 93330b0.

[michael-hawker]

Looks good, just a suggestion for another test if you think it'd be good.