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WalkthroughThis update introduces a new animated intro view feature for .NET MAUI, including a customizable Changes
Sequence Diagram(s)sequenceDiagram
participant User
participant IntroPage
participant FreakyIntroView
participant FreakyIntroStep
participant SkiaSharpCanvas
User->>IntroPage: Navigates to IntroPage
IntroPage->>FreakyIntroView: Initializes with Steps from IntroViewModel
FreakyIntroView->>FreakyIntroStep: Binds ItemsSource (Steps)
User->>FreakyIntroView: Swipes or taps to change step
FreakyIntroView->>SkiaSharpCanvas: Triggers animation (e.g., Wave, Ripple)
SkiaSharpCanvas-->>FreakyIntroView: Renders animation frame
FreakyIntroView-->>User: Updates displayed step and animation
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Actionable comments posted: 6
🧹 Nitpick comments (5)
Maui.FreakyUXKit/Samples/Intro/IntroPage.xaml.cs (1)
3-10: Consider dependency injection for better architecture.While the current implementation works, directly instantiating
IntroViewModelin the constructor creates tight coupling between the view and view model. For better testability and maintainability, consider using dependency injection.Example refactoring using dependency injection:
-public partial class IntroPage : ContentPage +public partial class IntroPage : ContentPage { - public IntroPage() + public IntroPage(IntroViewModel viewModel) { InitializeComponent(); - BindingContext = new IntroViewModel(); + BindingContext = viewModel; } }This approach would require registering the
IntroViewModelin your DI container and updating the navigation registration.Maui.FreakyUXKit/Samples/Resources/Styles/Styles.xaml (1)
205-207: Consider using color resource reference.The style is correctly implemented, but consider using a color resource reference instead of hardcoded "White" for better maintainability and theme consistency.
- <Style TargetType="Label" x:Key="PrimaryLabelStyle"> - <Setter Property="TextColor" Value="White" /> - </Style> + <Style TargetType="Label" x:Key="PrimaryLabelStyle"> + <Setter Property="TextColor" Value="{StaticResource White}" /> + </Style>Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml (1)
18-18: Remove unnecessary Grid.Row attributeThe
Grid.Row="0"attribute on the CarouselView is unnecessary since it's inside an AbsoluteLayout, not a Grid.- <CarouselView - Grid.Row="0" + <CarouselViewMaui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs (2)
495-495: Extract magic number to constantThe value
0.016frepresents the frame time for 60 FPS. Extract it to a constant for clarity.+private const float FrameTime = 0.016f; // 60 FPS frame time in seconds private void UpdateParticles() { // ... particle.Position = new SKPoint( - particle.Position.X + particle.Velocity.X * 0.016f, - particle.Position.Y + particle.Velocity.Y * 0.016f); + particle.Position.X + particle.Velocity.X * FrameTime, + particle.Position.Y + particle.Velocity.Y * FrameTime);
453-453: Consider using a static Random instanceCreating a new Random instance on each particle initialization could lead to similar seed values. Consider using a static instance.
+private static readonly Random _random = new Random(); private void InitializeParticles(SKSize canvasSize) { particles.Clear(); - var random = new Random(); var particleCount = 50; for (int i = 0; i < particleCount; i++) { particles.Add(new Particle { Position = new SKPoint(canvasSize.Width / 2, canvasSize.Height), Velocity = new SKPoint( - (float)(random.NextDouble() - 0.5) * 200, - (float)(random.NextDouble() * -300 - 100)), - Size = (float)(random.NextDouble() * 8 + 2), + (float)(_random.NextDouble() - 0.5) * 200, + (float)(_random.NextDouble() * -300 - 100)), + Size = (float)(_random.NextDouble() * 8 + 2), Color = animationColor, Life = 1f }); } }
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📒 Files selected for processing (16)
Maui.FreakyUXKit/Maui.FreakyUXKit/Coachmark/CoachmarkAnimationStyle.cs(1 hunks)Maui.FreakyUXKit/Maui.FreakyUXKit/Hosting.cs(0 hunks)Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroStep.cs(1 hunks)Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml(1 hunks)Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs(1 hunks)Maui.FreakyUXKit/Maui.FreakyUXKit/Maui.FreakyUXKit.csproj(2 hunks)Maui.FreakyUXKit/Samples/AppShell.xaml.cs(1 hunks)Maui.FreakyUXKit/Samples/Extensions.cs(1 hunks)Maui.FreakyUXKit/Samples/FreakyBaseContentPage.xaml(1 hunks)Maui.FreakyUXKit/Samples/Intro/IntroPage.xaml(1 hunks)Maui.FreakyUXKit/Samples/Intro/IntroPage.xaml.cs(1 hunks)Maui.FreakyUXKit/Samples/Intro/IntroViewModel.cs(1 hunks)Maui.FreakyUXKit/Samples/MainPage.xaml(1 hunks)Maui.FreakyUXKit/Samples/MainViewModel.cs(1 hunks)Maui.FreakyUXKit/Samples/Resources/Styles/Colors.xaml(1 hunks)Maui.FreakyUXKit/Samples/Resources/Styles/Styles.xaml(1 hunks)
💤 Files with no reviewable changes (1)
- Maui.FreakyUXKit/Maui.FreakyUXKit/Hosting.cs
🧰 Additional context used
🧬 Code Graph Analysis (1)
Maui.FreakyUXKit/Samples/AppShell.xaml.cs (3)
Maui.FreakyUXKit/Samples/Arrow/ArrowCoachmarkPage.xaml.cs (2)
ArrowCoachmarkPage(3-10)ArrowCoachmarkPage(5-9)Maui.FreakyUXKit/Samples/Spotlight/SpotlightCoachmarkPage.xaml.cs (2)
SpotlightCoachmarkPage(3-10)SpotlightCoachmarkPage(5-9)Maui.FreakyUXKit/Samples/Intro/IntroPage.xaml.cs (2)
IntroPage(3-10)IntroPage(5-9)
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🔇 Additional comments (12)
Maui.FreakyUXKit/Maui.FreakyUXKit/Coachmark/CoachmarkAnimationStyle.cs (1)
12-12: LGTM - Code formatting improvement.Good cleanup of trailing whitespace.
Maui.FreakyUXKit/Samples/FreakyBaseContentPage.xaml (1)
21-21: LGTM - Improved data binding reliability.Explicitly setting the binding context to the templated parent ensures proper data context propagation in the control template, which is essential for reliable binding in templated controls.
Maui.FreakyUXKit/Samples/MainPage.xaml (1)
26-26: LGTM - Data type alignment with view model changes.The change from
CoachmarkAnimationStyletox:Stringproperly aligns the DataTemplate with the updated view model structure that now uses string-based navigation instead of enum types.Maui.FreakyUXKit/Samples/Resources/Styles/Colors.xaml (1)
11-12: LGTM - Color resources for intro view feature.The new Orange and Yellow color resources are properly defined and support the FreakyIntroView functionality introduced in this PR.
Maui.FreakyUXKit/Maui.FreakyUXKit/Maui.FreakyUXKit.csproj (2)
10-10: Good addition for performance optimization.Enabling XAML C# binding with source compilation is a best practice that improves runtime performance by generating compiled bindings.
45-49: Proper XAML code-behind dependency setup.The ItemGroup correctly establishes the dependency relationship between the XAML file and its code-behind, ensuring proper build and tooling support.
Maui.FreakyUXKit/Samples/Intro/IntroPage.xaml (1)
1-14: Well-structured XAML page implementation.The page follows MAUI best practices with proper namespace declarations, data binding setup, and platform-specific configurations. The integration of the custom FreakyIntroView control is cleanly implemented.
Maui.FreakyUXKit/Samples/Extensions.cs (1)
5-14: Excellent utility extension method.The
GetResource<T>method provides a clean, type-safe way to retrieve resources from ResourceDictionary. The implementation correctly handles edge cases (missing keys, type mismatches) and returns appropriate default values.Maui.FreakyUXKit/Samples/AppShell.xaml.cs (2)
15-15: Route registration implemented correctly.The new intro route is properly registered following the established pattern used for other routes.
4-7: Fix inconsistent casing in route constants.The route constants show inconsistent casing. While
Arrow,Focus, andSpotlightare properly capitalized,introshould follow the same pattern.- internal const string intro = "Intro"; + internal const string intro = "Intro";Wait, let me check this again. Actually, the constant name is
intro(lowercase) but the value should be"Intro"(capitalized) to match the pattern. Let me correct this:- internal const string intro = "Intro"; + internal const string intro = "Intro";Actually, looking at the code, the issue is the constant name should be capitalized:
- internal const string intro = "Intro"; + internal const string Intro = "Intro";And then the usage would need to be updated as well.
Likely an incorrect or invalid review comment.
Maui.FreakyUXKit/Samples/MainViewModel.cs (1)
7-24: Clean refactoring to string-based navigationThe refactoring from enum-based to string-based navigation is well implemented. Using AppShell constants directly improves maintainability and the simplified navigation logic is cleaner.
Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs (1)
676-689: Well-structured animation type enumThe IntroAnimationType enum is well-defined with clear, descriptive values for different animation styles.
| Background = Application.Current.Resources.GetResource<Color>("Orange") | ||
| }, | ||
| new() { | ||
| TitleText = "Buy from anywhere", |
There was a problem hiding this comment.
Duplicate title text between steps
Steps 2 and 3 have identical title text "Buy from anywhere". This appears to be a copy-paste error.
Consider updating one of the titles to reflect different content, such as:
- Step 2: "Shop from anywhere"
- Step 3: "Delivered to your door"
Also applies to: 36-36
🤖 Prompt for AI Agents
In Maui.FreakyUXKit/Samples/Intro/IntroViewModel.cs at lines 25 and 36, the
title text for steps 2 and 3 are both set to "Buy from anywhere," causing
duplicate titles. Update the title text for one of these steps to a distinct
value, such as changing step 2's title to "Shop from anywhere" and step 3's
title to "Delivered to your door," to ensure each step has a unique and relevant
title.
|
|
||
| public partial class IntroViewModel : FreakyBaseViewModel | ||
| { | ||
| public List<FreakyIntroStep> Steps { get; set; } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider making Steps property immutable
Since the Steps collection is initialized once in the constructor and doesn't need to be reassigned, consider making it read-only to prevent accidental modification.
- public List<FreakyIntroStep> Steps { get; set; }
+ public List<FreakyIntroStep> Steps { get; }📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| public List<FreakyIntroStep> Steps { get; set; } | |
| public List<FreakyIntroStep> Steps { get; } |
🤖 Prompt for AI Agents
In Maui.FreakyUXKit/Samples/Intro/IntroViewModel.cs at line 7, the Steps
property is currently mutable but should be made immutable since it is only set
once in the constructor. Change the property to have a getter only by removing
the setter, and initialize the list in the constructor or inline to ensure it
cannot be reassigned after construction.
| public Style SubtitleLabelStyle { get; set; } | ||
| public string LeftButtonText { get; set; } | ||
| public ICommand LeftButtonCommand { get; set; } | ||
| public bool IsLeftButtonVisible { get; set; } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Initialize boolean properties with default values
Boolean properties should be initialized to ensure predictable behavior, especially for visibility properties.
- public bool IsLeftButtonVisible { get; set; }
+ public bool IsLeftButtonVisible { get; set; } = true;
public string CenterButtonText { get; set; }
public ICommand CenterButtonCommand { get; set; }
- public bool IsCenterButtonVisible { get; set; }
+ public bool IsCenterButtonVisible { get; set; } = true;
public string RightButtonText { get; set; }
public ICommand RightButtonCommand { get; set; }
- public bool IsRightButtonVisible { get; set; }
+ public bool IsRightButtonVisible { get; set; } = true;Also applies to: 20-20, 23-23
🤖 Prompt for AI Agents
In Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroStep.cs at lines 17,
20, and 23, the boolean properties are not explicitly initialized. Initialize
these boolean properties with default values (true or false as appropriate) in
their declarations to ensure predictable behavior, especially for
visibility-related properties.
| Dispatcher.StartTimer(TimeSpan.FromMilliseconds(16), () => | ||
| { | ||
| rippleRadius += 30 * (float)AnimationSpeed; // Apply speed multiplier | ||
| canvasView.InvalidateSurface(); | ||
|
|
||
| if (rippleRadius >= rippleMaxRadius) | ||
| { | ||
| isAnimatingRipple = false; | ||
| BackgroundColor = color; // set final BG | ||
| canvasView.InvalidateSurface(); // clear ripple | ||
| return false; // stop timer | ||
| } | ||
|
|
||
| return true; | ||
| }); |
There was a problem hiding this comment.
Store timer references for proper disposal
The timers created with Dispatcher.StartTimer are not stored, making it impossible to stop them if needed (e.g., when the view is disposed or navigation occurs).
Consider storing timer references and implementing IDisposable:
+private IDispatcherTimer _rippleTimer;
+private IDispatcherTimer _animationTimer;
public void StartRipple(Color color)
{
+ _rippleTimer?.Stop();
// ... existing code ...
- Dispatcher.StartTimer(TimeSpan.FromMilliseconds(16), () =>
+ _rippleTimer = Dispatcher.CreateTimer();
+ _rippleTimer.Interval = TimeSpan.FromMilliseconds(16);
+ _rippleTimer.Tick += (s, e) =>
{
// ... existing timer logic ...
if (rippleRadius >= rippleMaxRadius)
{
+ _rippleTimer.Stop();
// ... existing cleanup ...
- return false;
}
- return true;
- });
+ };
+ _rippleTimer.Start();
}Also applies to: 430-445
🤖 Prompt for AI Agents
In Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs around
lines 394 to 408 and 430 to 445, the Dispatcher.StartTimer calls create timers
without storing their references, preventing proper disposal or stopping later.
Modify the code to store the returned timer references in private fields or
properties, and implement IDisposable on the class to stop and dispose these
timers when the view is disposed or navigation occurs, ensuring no timers run
unnecessarily.
| var steps = this.ItemsSource.ElementAtOrDefault(e.CurrentPosition); | ||
| rippleColor = steps.BackgroundAnimationColor.ToSKColor(); |
There was a problem hiding this comment.
Add null check for ElementAtOrDefault
ElementAtOrDefault can return null. Add a null check to prevent potential NullReferenceException.
var steps = this.ItemsSource.ElementAtOrDefault(e.CurrentPosition);
+if (steps == null) return;
rippleColor = steps.BackgroundAnimationColor.ToSKColor();📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| var steps = this.ItemsSource.ElementAtOrDefault(e.CurrentPosition); | |
| rippleColor = steps.BackgroundAnimationColor.ToSKColor(); | |
| var steps = this.ItemsSource.ElementAtOrDefault(e.CurrentPosition); | |
| if (steps == null) return; | |
| rippleColor = steps.BackgroundAnimationColor.ToSKColor(); |
🤖 Prompt for AI Agents
In Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs around
lines 373 to 374, the code uses ElementAtOrDefault which can return null, and
then immediately accesses a property on the result causing a potential
NullReferenceException. Add a null check after retrieving the element to ensure
it is not null before accessing BackgroundAnimationColor, and handle the null
case appropriately to avoid exceptions.
There was a problem hiding this comment.
Actionable comments posted: 0
♻️ Duplicate comments (4)
Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs (4)
373-374: Add null check for ElementAtOrDefault
ElementAtOrDefaultcan return null. Add a null check to prevent potential NullReferenceException.
394-408: Store timer references for proper disposalThe timers created with
Dispatcher.StartTimerare not stored, making it impossible to stop them if needed (e.g., when the view is disposed or navigation occurs).
430-445: Store timer references for proper disposalThe timer created with
Dispatcher.StartTimeris not stored, preventing proper cleanup when needed.
9-676: Implement IDisposable for proper resource cleanupThe class creates timers that need to be stopped and disposed when the view is destroyed. Without proper cleanup, timers may continue running and cause memory leaks.
Consider implementing IDisposable:
-public partial class FreakyIntroView +public partial class FreakyIntroView : IDisposable { + private IDispatcherTimer _rippleTimer; + private IDispatcherTimer _animationTimer; + private bool _disposed; + + public void Dispose() + { + Dispose(true); + GC.SuppressFinalize(this); + } + + protected virtual void Dispose(bool disposing) + { + if (!_disposed) + { + if (disposing) + { + _rippleTimer?.Stop(); + _animationTimer?.Stop(); + wavePath?.Dispose(); + } + _disposed = true; + } + }Also ensure timers are stopped when starting new animations to prevent multiple timers running simultaneously.
🧹 Nitpick comments (2)
Maui.FreakyUXKit/Maui.FreakyUXKit/IntroView/FreakyIntroView.xaml.cs (2)
487-500: Optimize particle removal for better performanceConsider using
RemoveAllinstead of iterating and removing individual particles for better performance with large particle counts.Apply this refactor:
private void UpdateParticles() { - for (int i = particles.Count - 1; i >= 0; i--) - { - var particle = particles[i]; - particle.Position = new SKPoint( - particle.Position.X + (particle.Velocity.X * 0.016f), - particle.Position.Y + (particle.Velocity.Y * 0.016f)); - particle.Life -= 0.02f * (float)AnimationSpeed; - - if (particle.Life <= 0) - particles.RemoveAt(i); - } + foreach (var particle in particles) + { + particle.Position = new SKPoint( + particle.Position.X + (particle.Velocity.X * 0.016f), + particle.Position.Y + (particle.Velocity.Y * 0.016f)); + particle.Life -= 0.02f * (float)AnimationSpeed; + } + + particles.RemoveAll(p => p.Life <= 0); }
636-656: Consider caching SKPath to reduce allocationsCreating a new
SKPathon every frame (60 FPS) generates unnecessary allocations. Consider caching or pooling the path object.You could cache the path as a field and clear/reuse it:
+private readonly SKPath wavePath = new SKPath(); private void DrawWave(SKCanvas canvas, SKImageInfo info) { using var paint = new SKPaint { Color = animationColor, Style = SKPaintStyle.Fill }; - using var path = new SKPath(); + wavePath.Reset(); var waveHeight = info.Height * animationProgress; var amplitude = 50f; var frequency = 0.01f; - path.MoveTo(0, info.Height); + wavePath.MoveTo(0, info.Height); for (int x = 0; x <= info.Width; x += 5) { var y = info.Height - waveHeight + (amplitude * (float)Math.Sin((frequency * x) + wavePhase)); - path.LineTo(x, y); + wavePath.LineTo(x, y); } - path.LineTo(info.Width, info.Height); - path.Close(); - canvas.DrawPath(path, paint); + wavePath.LineTo(info.Width, info.Height); + wavePath.Close(); + canvas.DrawPath(wavePath, paint); }Don't forget to dispose the cached path when the view is disposed.
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New Features
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