Public Events for Integration

A feature that notifies host applications of signature pad activities, allowing developers to integrate responsive behavior based on user interactions.

Overview

This feature exposes several events—including ReplayStarted, ReplayCompleted, AnalyticsUpdated, StrokeStarted, StrokeCompleted, and SignatureCleared—to enable real-time integration and feedback within your application.

---

Detailed Documentation

Key Points

Aspect	Details
Replay Notifications	ReplayStarted and ReplayCompleted events signal the beginning and end of the signature replay animation.
Analytics Updates	AnalyticsUpdated is raised when signature analytics are computed, providing metrics like total length, stroke count, average speed, and pressure.
Stroke Lifecycle	StrokeStarted and StrokeCompleted events notify when a new stroke begins and ends, enabling real-time UI updates or logging during signature capture.
Signature Reset	SignatureCleared is triggered when the signature pad is cleared, informing the application of the state change.

Best Practices

Practice	Recommendation
Subscribe Early	Subscribe to events immediately after initializing the signature pad to ensure that all interactions are captured.
Update UI Consistently	Use the events to update user interface elements (e.g., enabling/disabling buttons, updating status labels) based on the current signature state.
Leverage Analytics Data	Handle AnalyticsUpdated to collect usage metrics for validation or audit purposes, ensuring that analytics data is retrieved after complete strokes.
Unsubscribe When Appropriate	Remove event handlers when the signature pad is disposed or no longer in use to avoid memory leaks.

Common Pitfalls

Pitfall	Mitigation
Missing Event Subscriptions	Failing to subscribe to critical events (such as StrokeCompleted) may result in a lack of feedback; ensure all necessary events are handled.
Overcomplicating Event Handlers	Complex logic in event handlers can slow down the UI; keep the logic lightweight or offload heavy processing to background tasks if needed.
Memory Leaks from Unmanaged Events	Ensure that event handlers are unsubscribed when the control is disposed to avoid lingering references that lead to memory leaks.
Ignoring Event Data	Do not overlook the information provided by events like AnalyticsUpdated—this data can be critical for performance monitoring and user feedback.

Usage Scenarios

Scenario	Description
Real-Time Signature Feedback	Use stroke lifecycle events to provide immediate visual or textual feedback as the user interacts with the signature pad.
Logging and Auditing	Integrate AnalyticsUpdated to log signature characteristics, helping with audit trails in secure applications such as banking or legal document signing.
Animation Coordination	Use ReplayStarted and ReplayCompleted events to synchronize additional UI animations or to disable user interactions during signature replay.

Real Life Usage Scenarios

Scenario	Description
Banking Applications	Financial applications can use signature events to update the UI in real time, ensuring that users receive immediate confirmation of their actions.
Legal Document Signing	Legal platforms benefit from detailed analytics and stroke events to verify signature authenticity and record detailed user interactions.
Educational Software	Training tools can leverage stroke and replay events to provide guided feedback, helping users learn proper signature formation techniques.

Code Examples

Example 1: Subscribing to Stroke and Replay Events

using System;
using System.Drawing;
using System.Windows.Forms;
using SiticoneNetFrameworkUI;

public class EventIntegrationForm : Form
{
    private SiticoneSignaturePad signaturePad;
    private Label statusLabel;

    public EventIntegrationForm()
    {
        // Initialize the signature pad
        signaturePad = new SiticoneSignaturePad
        {
            Location = new Point(10, 10),
            Size = new Size(400, 200)
        };

        // Initialize status label
        statusLabel = new Label
        {
            Location = new Point(10, 220),
            Size = new Size(400, 30),
            Text = "Status: Idle"
        };

        // Subscribe to events
        signaturePad.StrokeStarted += (s, e) => statusLabel.Text = "Status: Stroke started";
        signaturePad.StrokeCompleted += (s, e) => statusLabel.Text = "Status: Stroke completed";
        signaturePad.SignatureCleared += (s, e) => statusLabel.Text = "Status: Signature cleared";
        signaturePad.ReplayStarted += (s, e) => statusLabel.Text = "Status: Replay started";
        signaturePad.ReplayCompleted += (s, e) => statusLabel.Text = "Status: Replay completed";
        signaturePad.AnalyticsUpdated += (s, analytics) =>
        {
            // Example: Log or display analytics data
            Console.WriteLine($"Total Length: {analytics.TotalLength}, Stroke Count: {analytics.StrokeCount}");
        };

        // Add controls to the form
        Controls.Add(signaturePad);
        Controls.Add(statusLabel);
    }

    [STAThread]
    public static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new EventIntegrationForm());
    }
}

Example 2: Unsubscribing from Events on Dispose

using System;
using System.Drawing;
using System.Windows.Forms;
using SiticoneNetFrameworkUI;

public class CleanUpEventsForm : Form
{
    private SiticoneSignaturePad signaturePad;

    public CleanUpEventsForm()
    {
        signaturePad = new SiticoneSignaturePad
        {
            Location = new Point(10, 10),
            Size = new Size(400, 200)
        };

        // Subscribe to events with named methods for easy unsubscription
        signaturePad.StrokeStarted += OnStrokeStarted;
        signaturePad.StrokeCompleted += OnStrokeCompleted;

        Controls.Add(signaturePad);
    }

    private void OnStrokeStarted(object sender, SignaturePad.StrokeEventArgs e)
    {
        // Handle stroke start event
    }

    private void OnStrokeCompleted(object sender, SignaturePad.StrokeEventArgs e)
    {
        // Handle stroke completion event
    }

    protected override void OnFormClosing(FormClosingEventArgs e)
    {
        // Unsubscribe from events to prevent memory leaks
        signaturePad.StrokeStarted -= OnStrokeStarted;
        signaturePad.StrokeCompleted -= OnStrokeCompleted;
        base.OnFormClosing(e);
    }

    [STAThread]
    public static void Main()
    {
        Application.EnableVisualStyles();
        Application.Run(new CleanUpEventsForm());
    }
}

Troubleshooting Tips

Tip	Explanation
Confirm Event Subscriptions	Verify that event handlers are attached immediately after control initialization to capture all relevant interactions.
Use Logging for Debugging	Implement logging within event handlers to trace when and how events are fired, which helps in diagnosing missing or extra events.
Unsubscribe Properly	Ensure that you unsubscribe from events when the control is disposed to prevent memory leaks and unexpected behavior in long-running applications.
Validate Event Data	Check the data provided by events such as AnalyticsUpdated to ensure that it is accurate and complete after user actions.

Review

Aspect	Review Comments
Integration	The public events integrate smoothly with the control, offering a flexible mechanism for real-time interaction handling.
Responsiveness	Real-time event notifications enhance user experience by enabling immediate UI updates and feedback.
Flexibility	The range of events available allows for detailed integration, from stroke lifecycle tracking to replay and analytics monitoring.

Summary

The Public Events for Integration feature in the SiticoneSignaturePad control provides a robust mechanism for receiving notifications about signature-related activities. By leveraging events such as ReplayStarted, ReplayCompleted, AnalyticsUpdated, StrokeStarted, StrokeCompleted, and SignatureCleared, developers can implement real-time feedback, logging, and UI updates that enrich the user experience and support detailed signature processing workflows.