142 lines
4.6 KiB
C#
142 lines
4.6 KiB
C#
using Godot;
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using Godot.Collections;
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using System;
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namespace DialogueManagerRuntime
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{
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/// <summary>
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/// A special <see cref="Area2D"/> node to hold information about starting dialogue.
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///
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/// Assuming <c>DialogueResource</c> and <c>DialogueCue</c> have been configured you can
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/// call <c>Action()</c> on this node at runtime to start dialogue.
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/// </summary>
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[Tool, Icon("uid://ja67jst5iqyy")]
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public partial class DialogueActionable2D : Area2D
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{
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/// <summary>
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/// Emitted when this <see cref="DialogueActionable2D"/> has <c>Action()</c> called on it.
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/// </summary>
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[Signal] public delegate void ActionedEventHandler();
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/// <summary>
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/// Emitted when the dialogue resource associated with this <see cref="DialogueActionable2D"/> ends. NOTE: The
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/// signal is also emitted if the same resource is used for multiple <see cref="DialogueActionable2D"/> nodes in the tree.
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/// </summary>
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[Signal] public delegate void DialogueEndedEventHandler();
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private Resource dialogueResource = null;
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/// <summary>
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/// The dialogue resource to use when starting dialogue.
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/// </summary>
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[Export]
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public Resource DialogueResource
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{
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get => dialogueResource;
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set
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{
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dialogueResource = value;
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if (dialogueResource == null)
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{
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DialogueCue = "";
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}
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NotifyPropertyListChanged();
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}
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}
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/// <summary>
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/// The target cue to start dialogue from.
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/// </summary>
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[Export] public string DialogueCue = "";
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/// <summary>
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/// The dialogue balloon that was last used by calling <c>Action()</c> (if there was one).
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/// </summary>
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public Node DialogueBalloon;
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/// <summary>
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/// The method used to start dialogue when <c>Action()</c> is called. Override if you need different logic.
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/// </summary>
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public static Func<Resource, string, Array<Variant>, Node> StartDialogue = (withDialogueResource, fromCue, extraGameStates) =>
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DialogueManager.ShowDialogueBalloon(withDialogueResource, fromCue, extraGameStates);
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public override void _Ready()
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{
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if (!Engine.IsEditorHint())
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{
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AddToGroup("dialogue_actionables");
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// Touch the instance to make sure the DialogueManager bridge signals are connected
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_ = DialogueManager.Instance;
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DialogueManager.DialogueEnded += OnDialogueEnded;
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}
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}
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public override void _ExitTree()
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{
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if (!Engine.IsEditorHint())
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{
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DialogueManager.DialogueEnded -= OnDialogueEnded;
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}
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}
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#region Public
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/// <summary>
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/// Action this <see cref="DialogueActionable2D"/>. If a dialogue resource and cue have been set on this node then it will start dialogue.
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/// </summary>
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public void Action()
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{
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if (IsInstanceValid(DialogueResource) && !string.IsNullOrEmpty(DialogueCue))
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{
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DialogueBalloon = StartDialogue(DialogueResource, DialogueCue, new Array<Variant> { new Dictionary { { "actionable", this } }, Owner });
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}
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EmitSignal(SignalName.Actioned);
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}
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/// <summary>
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/// Find the nearest <see cref="DialogueActionable2D"/> to a given position.
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/// </summary>
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public static DialogueActionable2D GetNearestActionableTo(Vector2 targetPosition)
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{
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float nearestDistance = float.PositiveInfinity;
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DialogueActionable2D nearestActionable = null;
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foreach (Node node in ((SceneTree)Engine.GetMainLoop()).GetNodesInGroup("dialogue_actionables"))
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{
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if (node is not DialogueActionable2D actionable) continue;
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float distance = actionable.GlobalPosition.DistanceSquaredTo(targetPosition);
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if (distance < nearestDistance)
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{
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nearestDistance = distance;
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nearestActionable = actionable;
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}
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}
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return nearestActionable;
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}
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#endregion
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#region Signals
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private void OnDialogueEnded(Resource endingDialogueResource)
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{
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if (endingDialogueResource == DialogueResource)
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{
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EmitSignal(SignalName.DialogueEnded);
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}
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}
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#endregion
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}
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}
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