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65 lines
2.0 KiB
65 lines
2.0 KiB
using System.Collections.Generic;
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using Godot;
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namespace Babushka.scripts.CSharp.Low_Code.Events;
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/// <summary>
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/// Represents an event in the project space.
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/// Can be called by <see cref="EventRaiser"/> and subscribed to by <see cref="EventListener"/>.
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/// </summary>
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[GlobalClass] [Tool]
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public partial class EventResource : Resource
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{
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/// <summary>
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/// Log into console when this event resource is adding or removing listeners, and when it's raised.
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/// </summary>
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[Export] private bool _showLog;
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/// <summary>
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/// Raise-Button Call with Editor Export for easier debugging.
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/// Beware: This will only work with custom event listeners that register at edit-time.
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/// Standard <see cref="EventListeners"/> register and deregister during playtime.
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/// </summary>
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[ExportToolButton("Raise")] Callable _raiseAction => Callable.From(Raise);
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private List<EventListener> _eventListeners = new ();
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/// <summary>
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/// Adds an EventListener to the calling list for this event.
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/// </summary>
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/// <param name="listener"></param>
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public void RegisterListener(EventListener listener)
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{
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if(_showLog)
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GD.Print("Registering listener " + listener);
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_eventListeners.Add(listener);
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}
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/// <summary>
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/// Removes an Eventlistener from the calling list for this event.
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/// </summary>
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/// <param name="listener"></param>
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public void UnregisterListener(EventListener listener)
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{
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if(_showLog)
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GD.Print("Unregistering listener " + listener);
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_eventListeners.Remove(listener);
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}
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/// <summary>
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/// Raises this event on all current listeners.
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/// </summary>
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public void Raise()
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{
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if(_showLog)
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GD.Print("Raising event: " + ResourcePath.GetFile().TrimSuffix(".tres"));
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foreach (var eventListener in _eventListeners)
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{
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eventListener.EventInvoked();
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}
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}
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} |