Events

Events empower developers to respond to key lifecycle moments of the spinner control by triggering custom actions when the spinner starts or stops its animation.

Overview

The Events feature of the SiticoneCircularSpinner control exposes two key events—SpinnerStarted and SpinnerStopped—that notify developers when the spinner's animation commences or halts. These events facilitate integration with other UI components or business logic, allowing for synchronized updates, logging, or user feedback during state transitions.

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Events Table

The table below summarizes the primary events provided by the spinner control:

Event Name	Delegate Type	Description	Usage Example
SpinnerStarted	EventHandler	Occurs when the spinner animation begins.	spinner.SpinnerStarted += (s, e) => { /* custom logic */ };
SpinnerStopped	EventHandler	Occurs when the spinner animation stops.	spinner.SpinnerStopped += (s, e) => { /* custom logic */ };

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Code Examples and Samples

Sample Code: Attaching Event Handlers

// Create an instance of the spinner control
var spinner = new SiticoneNetFrameworkUI.SiticoneCircularSpinner();

// Attach an event handler to perform an action when the spinner starts
spinner.SpinnerStarted += (sender, e) =>
{
    Console.WriteLine("Spinner animation has started.");
    // Additional logic such as logging or updating the UI can be placed here.
};

// Attach an event handler to perform an action when the spinner stops
spinner.SpinnerStopped += (sender, e) =>
{
    Console.WriteLine("Spinner animation has stopped.");
    // Additional actions such as cleanup or state updates can be performed here.
};

// Add the spinner control to the WinForms form
this.Controls.Add(spinner);
spinner.Location = new Point(300, 300);

Sample Code: Conditional UI Updates Based on Spinner Events

// Example: Updating UI elements in response to spinner events
private void SetupSpinnerEventHandlers()
{
    spinner.SpinnerStarted += (s, e) =>
    {
        // Disable a button while the spinner is active
        btnSubmit.Enabled = false;
        lblStatus.Text = "Processing...";
    };

    spinner.SpinnerStopped += (s, e) =>
    {
        // Re-enable the button and update status when spinner stops
        btnSubmit.Enabled = true;
        lblStatus.Text = "Ready";
    };
}

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Key Points

The table below highlights the critical aspects of using the Events feature:

Aspect	Explanation	Recommendations
Timely Notifications	Events provide immediate feedback when the spinner starts or stops.	Use events to synchronize other UI elements or operations with the spinner's state.
Lightweight Integration	The events are designed to be simple and easy to hook into, minimizing the overhead in your code.	Attach concise event handlers to maintain application responsiveness.
Flexibility	The events can trigger any custom logic, from UI updates to logging or debugging.	Leverage events for multi-faceted integration with your application workflow.

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Best Practices

Best Practice	Explanation	Sample Implementation
Minimalistic Event Handlers	Keep event handler logic succinct to prevent delays in processing the spinner state transitions.	Use helper methods or delegate calls to encapsulate logic.
Ensure Thread Safety	When updating UI components within event handlers, ensure the operations are performed on the UI thread.	Use Invoke or BeginInvoke when necessary.
Consistent Logging or Feedback	Use events consistently to update the UI or log the spinner's state transitions for debugging purposes.	spinner.SpinnerStarted += LogSpinnerStart;

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Common Pitfalls

Pitfall	Explanation	Mitigation Strategy
Overcomplicating Handlers	Adding too much logic in an event handler may lead to performance issues or sluggish UI updates.	Keep event handlers lean and offload heavy processing to separate methods.
Ignoring Thread Affinity	Directly updating UI elements from non-UI threads in event handlers can cause cross-thread exceptions.	Always ensure that UI updates are executed on the main UI thread using Invoke if necessary.
Forgetting to Unsubscribe	Failing to unsubscribe from events when the spinner control is disposed can lead to memory leaks.	Remove event handlers in the control's Dispose method or during form cleanup.

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Usage Scenarios

Scenario	Explanation	Implementation Example
Synchronizing UI Elements	Use events to disable or update other controls when the spinner starts or stops.	Disable a form button while the spinner is active and re-enable it once finished.
Logging and Debugging	Capture spinner start and stop events to log activity for debugging or audit purposes.	Log events to a file or console output for tracking animation performance.
User Feedback During Operations	Provide real-time status updates to the user by updating labels or progress messages when events occur.	Update a status label to reflect "Processing..." when SpinnerStarted is fired and "Completed" when SpinnerStopped is fired.

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Review

The Events feature of the SiticoneCircularSpinner control provides developers with hooks to execute custom logic when the spinner's animation starts or stops. These events facilitate enhanced integration with the overall application workflow, enabling synchronized UI updates, logging, or additional business logic based on the spinner's state. The simplicity of these events makes them highly effective for creating responsive and interactive user interfaces.

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Summary

The Events section enables the SiticoneCircularSpinner to communicate its lifecycle changes—specifically when it starts and stops animating—allowing developers to integrate custom responses into their applications. By using the SpinnerStarted and SpinnerStopped events, developers can ensure that their UI remains in sync with the spinner's state, improving overall user experience and interactivity.

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Additional Considerations

Consideration	Details	Recommendations
Memory Management	Unsubscribing from events is important to avoid memory leaks, especially in dynamic UIs.	Ensure event handlers are removed during cleanup or control disposal.
Handling Rapid State Changes	Frequent start/stop events may overwhelm event handlers if not managed correctly.	Throttle or debounce event handling if rapid state changes are anticipated.
Integration with Complex Workflows	In applications with multiple asynchronous operations, ensuring that events are processed correctly is vital.	Use proper synchronization techniques and consider event aggregation if needed.

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By following the guidelines and examples provided in this documentation, developers can effectively utilize the Events feature of the SiticoneCircularSpinner control to enhance interactivity, ensure consistent UI behavior, and integrate seamlessly with other application components.