73 lines
2 KiB
C#
73 lines
2 KiB
C#
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using TMPro;
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using UnityEngine;
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using UnityEngine.UI;
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public class DropdownMenu : MonoBehaviour
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{
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public Canvas Canvas;
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public ClickCatcher CancelClickCatcher;
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public PropertyButton OptionPrefab;
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public RectTransform ContentRoot;
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public float OptionHeight;
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public float PaddingHeight;
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private List<GameObject> _options = new List<GameObject>();
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private void Start()
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{
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if (CancelClickCatcher != null)
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CancelClickCatcher.OnClick += data =>
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{
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End();
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};
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}
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private void End()
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{
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CancelClickCatcher.gameObject.SetActive(false);
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gameObject.SetActive(false);
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}
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public void Clear()
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{
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// Destroy previous options
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foreach(var option in _options)
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Destroy(option);
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_options.Clear();
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}
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public void AddOption(string text, Action action, bool selected = false, bool enabled = true)
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{
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var optionButton = Instantiate(OptionPrefab, ContentRoot);
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optionButton.Label.text = text;
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optionButton.Button.OnClick += data =>
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{
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action();
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End();
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};
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optionButton.Button.CurrentState = !enabled ? FlatButtonState.Disabled : selected ? FlatButtonState.Selected : FlatButtonState.Unselected;
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_options.Add(optionButton.gameObject);
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}
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public void Show(RectTransform parent)
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{
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var rect = transform as RectTransform;
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var pivot = rect.pivot;
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pivot.x = 0;
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var scaleFactor = Canvas.scaleFactor;
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var corners = new Vector3[4];
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parent.GetWorldCorners(corners);
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var pivotTop = corners[0].y > (PaddingHeight + _options.Count * OptionHeight) * scaleFactor;
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pivot.y = pivotTop ? 1 : 0;
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rect.pivot = pivot;
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rect.sizeDelta = parent.sizeDelta;
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rect.position = pivotTop ? corners[0] : corners[1];
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CancelClickCatcher.gameObject.SetActive(true);
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}
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}
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