How to highlight data points within a circular region in .NET MAUI Toolkit Cartesian Charts

Explore advanced data visualization techniques by extending the capabilities of .NET MAUI Toolkit Cartesian Charts to implement circular data point selection.

Overview

.NET MAUI Toolkit Cartesian Charts offer sophisticated customization capabilities for enhancing data visualization. While the standard GetDataPoints(Rect rectangle) method of the Cartesian series retrieves data points within a rectangular region, this project shows how to extend functionality to highlight data points within a circular region. This approach provides a more precise selection mechanism for specific data visualization needs.

Key Features

Advanced Interaction Behavior

• Implement custom circular data point selection using touch interactions.
• Visual feedback with a user-defined circular area on touch.
• Real-time updates of selected data points within the circle.

Precision Data Visualization

• More accurate data point selection for advanced analysis needs.
• Dynamic radius adjustment during user interaction.

Seamless Component Integration

• Utilize the ChartInteractiveBehavior class for custom behavior.
• Integrate GraphicsView for drawing the interactive selection circle.

Technologies Used

• .NET MAUI – Cross-platform app framework.
• Syncfusion® .NET MAUI Components – For advanced charting capabilities.
• MVVM Pattern – Promote clean architecture and separate concerns.

Syncfusion® Controls Used

This project demonstrates integration between key Syncfusion® controls:

• SfCartesianChart – For versatile charting capabilities.
• GraphicsView – For custom drawing interactions.

Troubleshooting

Path Too Long Exception

If encountering a "Path too long" exception, shorten the repository name and retry. Refer to the referenced KB article for more insights and relevant code snippets - How to highlight data points within a circular region in .NET MAUI Toolkit Cartesian Charts