Improve debugger experience

src/Controls/src/Core/ActivityIndicator/ActivityIndicator.cs

@@ -1,10 +1,12 @@
 #nullable disable
 using System;
+using System.Diagnostics;
 using Microsoft.Maui.Graphics;
 
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/ActivityIndicator.xml" path="Type[@FullName='Microsoft.Maui.Controls.ActivityIndicator']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class ActivityIndicator : View, IColorElement, IElementConfiguration<ActivityIndicator>, IActivityIndicator
 	{
 		/// <summary>Bindable property for <see cref="IsRunning"/>.</summary>
@@ -40,5 +42,10 @@ public IPlatformElementConfiguration<T, ActivityIndicator> On<T>() where T : ICo
 		{
 			return _platformConfigurationRegistry.Value.On<T>();
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"IsRunning = {IsRunning}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/Application/Application.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Threading;
 using System.Threading.Tasks;
@@ -15,6 +16,7 @@
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/Application.xml" path="Type[@FullName='Microsoft.Maui.Controls.Application']/Docs/*" />
+	[DebuggerDisplay("Windows Count: {Windows.Count}, MainPage = {MainPage}")]
 	public partial class Application : Element, IResourcesProvider, IApplicationController, IElementConfiguration<Application>, IVisualTreeElement, IApplication
 	{
 		readonly WeakEventManager _weakEventManager = new WeakEventManager();

src/Controls/src/Core/Button/Button.cs

@@ -13,6 +13,7 @@ namespace Microsoft.Maui.Controls
 	/// <summary>
 	/// A button <see cref="View" /> that reacts to touch events.
 	/// </summary>
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class Button : View, IFontElement, ITextElement, IBorderElement, IButtonController, IElementConfiguration<Button>, IPaddingElement, IImageController, IViewController, IButtonElement, ICommandElement, IImageElement, IButton, ITextButton, IImageButton
 	{
 		const double DefaultSpacing = 10;
@@ -607,5 +608,10 @@ public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo c
 			public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
 				=> throw new NotSupportedException();
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Text = {Text}, Command = {Command}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/CheckBox/CheckBox.cs

@@ -1,10 +1,12 @@
 #nullable disable
 using System;
+using System.Diagnostics;
 using Microsoft.Maui.Graphics;
 
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/CheckBox.xml" path="Type[@FullName='Microsoft.Maui.Controls.CheckBox']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class CheckBox : View, IElementConfiguration<CheckBox>, IBorderElement, IColorElement, ICheckBox
 	{
 		readonly Lazy<PlatformConfigurationRegistry<CheckBox>> _platformConfigurationRegistry;
@@ -79,5 +81,10 @@ bool ICheckBox.IsChecked
 			get => IsChecked;
 			set => SetValue(IsCheckedProperty, value, SetterSpecificity.FromHandler);
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"IsChecked = {IsChecked}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/ContentPage/ContentPage.cs

@@ -1,6 +1,7 @@
 #nullable disable
 
 using System;
+using System.Diagnostics;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.HotReload;
 using Microsoft.Maui.Layouts;
@@ -9,6 +10,7 @@ namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/ContentPage.xml" path="Type[@FullName='Microsoft.Maui.Controls.ContentPage']/Docs/*" />
 	[ContentProperty("Content")]
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class ContentPage : TemplatedPage, IContentView, HotReload.IHotReloadableView
 	{
 		/// <summary>Bindable property for <see cref="Content"/>.</summary>
@@ -147,5 +149,10 @@ Size IContentView.CrossPlatformMeasure(double widthConstraint, double heightCons
 		{
 			return (this as ICrossPlatformLayout).CrossPlatformMeasure(widthConstraint, heightConstraint);
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Content = {Content}, BindingContext = {BindingContext}";
+		}
 	}
 }

src/Controls/src/Core/ContentView/ContentView.cs

@@ -1,11 +1,13 @@
 #nullable disable
+using System.Diagnostics;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Layouts;
 
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/ContentView.xml" path="Type[@FullName='Microsoft.Maui.Controls.ContentView']/Docs/*" />
 	[ContentProperty("Content")]
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class ContentView : TemplatedView, IContentView
 	{
 		/// <summary>Bindable property for <see cref="Content"/>.</summary>
@@ -46,5 +48,10 @@ internal override void SetChildInheritedBindingContext(Element child, object con
 		object IContentView.Content => Content;
 
 		IView IContentView.PresentedContent => ((this as IControlTemplated).TemplateRoot as IView) ?? Content;
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Content = {Content}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/DatePicker/DatePicker.cs

@@ -1,11 +1,13 @@
 #nullable disable
 using System;
+using System.Diagnostics;
 using Microsoft.Maui.Controls.Internals;
 using Microsoft.Maui.Graphics;
 
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/DatePicker.xml" path="Type[@FullName='Microsoft.Maui.Controls.DatePicker']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class DatePicker : View, IFontElement, ITextElement, IElementConfiguration<DatePicker>, IDatePicker
 	{
 		/// <summary>Bindable property for <see cref="Format"/>.</summary>
@@ -239,5 +241,10 @@ string IDatePicker.Format
 			get => Format;
 			set => SetValue(FormatProperty, value, SetterSpecificity.FromHandler);
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Date = {Date}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/FlyoutPage/FlyoutPage.cs

@@ -381,5 +381,9 @@ double IFlyoutView.FlyoutWidth
 #else
 		double IFlyoutView.FlyoutWidth => -1;
 #endif
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"DetailPage = {Detail}, FlyoutPage = {Flyout}, BindingContext = {BindingContext}";
+		}
 	}
 }

src/Controls/src/Core/Image/Image.cs

@@ -1,10 +1,12 @@
 #nullable disable
 using System;
 using System.ComponentModel;
+using System.Diagnostics;
 
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/Image.xml" path="Type[@FullName='Microsoft.Maui.Controls.Image']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class Image : View, IImageController, IElementConfiguration<Image>, IViewController, IImageElement, IImage
 	{
 		/// <summary>Bindable property for <see cref="Source"/>.</summary>
@@ -103,5 +105,10 @@ void IImageElement.RaiseImageSourcePropertyChanged() =>
 
 		void IImageSourcePart.UpdateIsLoading(bool isLoading) =>
 			IsLoading = isLoading;
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Source = {Source}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/IndicatorView/IndicatorView.cs

@@ -2,6 +2,7 @@
 using System;
 using System.Collections;
 using System.Collections.Specialized;
+using System.Diagnostics;
 using Microsoft.Maui.Controls.Internals;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Layouts;
@@ -10,6 +11,8 @@ namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/IndicatorView.xml" path="Type[@FullName='Microsoft.Maui.Controls.IndicatorView']/Docs/*" />
 	[ContentProperty(nameof(IndicatorLayout))]
+
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class IndicatorView : TemplatedView, ITemplatedIndicatorView
 	{
 		const int DefaultPadding = 4;
@@ -193,5 +196,10 @@ int IIndicatorView.Position
 			get => Position;
 			set => SetValue(PositionProperty, value, SetterSpecificity.FromHandler);
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Position = {Position}, Count = {Count}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/InputView/InputView.cs

@@ -1,11 +1,13 @@
 #nullable disable
 using System;
+using System.Diagnostics;
 using Microsoft.Maui.Controls.Internals;
 using Microsoft.Maui.Graphics;
 
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/InputView.xml" path="Type[@FullName='Microsoft.Maui.Controls.InputView']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class InputView : View, IPlaceholderElement, ITextElement, ITextInput, IFontElement
 	{
 		/// <summary>Bindable property for <see cref="Text"/>.</summary>
@@ -271,5 +273,10 @@ string ITextInput.Text
 			get => Text;
 			set => SetValue(TextProperty, value, SetterSpecificity.FromHandler);
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Text = {Text}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/Items/ItemsView.cs

@@ -225,5 +225,10 @@ protected override void OnBindingContextChanged()
 			if (InternalItemsLayout is BindableObject bo)
 				SetInheritedBindingContext(bo, BindingContext);
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"ItemsSource = {ItemsSource}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/Label/Label.cs

@@ -4,6 +4,7 @@
 using System.Collections.Generic;
 using System.Collections.Specialized;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Linq;
 using Microsoft.Maui.Controls.Internals;
 using Microsoft.Maui.Graphics;
@@ -12,6 +13,7 @@ namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/Label.xml" path="Type[@FullName='Microsoft.Maui.Controls.Label']/Docs/*" />
 	[ContentProperty(nameof(Text))]
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class Label : View, IFontElement, ITextElement, ITextAlignmentElement, ILineHeightElement, IElementConfiguration<Label>, IDecorableTextElement, IPaddingElement, ILabel
 	{
 		/// <summary>Bindable property for <see cref="HorizontalTextAlignment"/>.</summary>
@@ -477,5 +479,10 @@ internal static bool TextChangedShouldInvalidateMeasure(Label label)
 			// The label may grow/shrink based on the constraints, so we need to invalidate.
 			return true;
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Text = {Text}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/Layout/Layout.cs

@@ -2,6 +2,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Linq;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Maui.Controls.Xaml.Diagnostics;
@@ -14,6 +15,7 @@ namespace Microsoft.Maui.Controls
 	/// Base class for layouts that allow you to arrange and group UI controls in your application.
 	/// </summary>
 	[ContentProperty(nameof(Children))]
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public abstract partial class Layout : View, Maui.ILayout, IList<IView>, IBindableLayout, IPaddingElement, IVisualTreeElement, ISafeAreaView, IInputTransparentContainerElement
 	{
 		protected ILayoutManager _layoutManager;
@@ -383,5 +385,10 @@ static void OnCascadeInputTransparentPropertyChanged(BindableObject bindable, ob
 				layout.RefreshInputTransparentProperty();
 			}
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"ChildCount = {Count}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/Page/Page.cs

@@ -4,6 +4,7 @@
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
@@ -18,6 +19,7 @@ namespace Microsoft.Maui.Controls
 	/// </summary>
 	/// <remarks><see cref = "Page" /> is primarily a base class for more useful derived types. Objects that are derived from the <see cref="Page"/> class are most prominently used as the top level UI element in .NET MAUI applications. In addition to their role as the main pages of applications, <see cref="Page"/> objects and their descendants can be used with navigation classes, such as <see cref="NavigationPage"/> or <see cref="FlyoutPage"/>, among others, to provide rich user experiences that conform to the expected behaviors on each platform.
 	/// </remarks>
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class Page : VisualElement, ILayout, IPageController, IElementConfiguration<Page>, IPaddingElement, ISafeAreaView, ISafeAreaView2, IView, ITitledElement, IToolbarElement
 #if IOS
 	,IiOSPageSpecifics
@@ -938,5 +940,10 @@ protected virtual void OnNavigatedFrom(NavigatedFromEventArgs args) { }
 		/// <returns>The <see cref="Window"/> instance that parents the page.</returns>
 		public virtual Window GetParentWindow()
 			=> this.FindParentOfType<Window>();
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"BindingContext = {BindingContext}, Title = {Title}";
+		}
 	}
 }

src/Controls/src/Core/Picker/Picker.cs

@@ -5,6 +5,7 @@
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Runtime.CompilerServices;
 using Microsoft.Maui.Controls.Internals;
 using Microsoft.Maui.Controls.Xaml;
@@ -13,6 +14,7 @@
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/Picker.xml" path="Type[@FullName='Microsoft.Maui.Controls.Picker']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class Picker : View, IFontElement, ITextElement, ITextAlignmentElement, IElementConfiguration<Picker>, IPicker
 	{
 		/// <summary>Bindable property for <see cref="TextColor"/>.</summary>
@@ -460,5 +462,10 @@ string GetItem(int index)
 
 			return string.Empty;
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Items = {ItemsSource?.Count ?? 0}, SelectedItem = {SelectedItem}, " + base.GetDebbugerDisplay();
+		}
 	}
 }

src/Controls/src/Core/ProgressBar/ProgressBar.cs

@@ -1,5 +1,6 @@
 #nullable disable
 using System;
+using System.Diagnostics;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 using Microsoft.Maui.Controls.Internals;
@@ -8,6 +9,7 @@
 namespace Microsoft.Maui.Controls
 {
 	/// <include file="../../docs/Microsoft.Maui.Controls/ProgressBar.xml" path="Type[@FullName='Microsoft.Maui.Controls.ProgressBar']/Docs/*" />
+	[DebuggerDisplay("{GetDebbugerDisplay(), nq}")]
 	public partial class ProgressBar : View, IElementConfiguration<ProgressBar>, IProgress
 	{
 		/// <summary>Bindable property for <see cref="ProgressColor"/>.</summary>
@@ -53,5 +55,10 @@ public IPlatformElementConfiguration<T, ProgressBar> On<T>() where T : IConfigPl
 		{
 			return _platformConfigurationRegistry.Value.On<T>();
 		}
+
+		private protected override string GetDebbugerDisplay()
+		{
+			return $"Progress = {Progress}, " + base.GetDebbugerDisplay();
+		}
 	}
 }