initial setup of dialogue panel and updating some scripts

Assets/Scripts/DialogueSystem/UI/DialoguePanel.cs

@@ -0,0 +1,95 @@
+using System.Collections;
+using System.Collections.Generic;
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class DialoguePanel : MonoBehaviour
+{
+    [SerializeField] private Transform m_questionHolder;
+    [SerializeField] private Button m_questionButton;
+
+    [SerializeField] private TMP_Text m_characterNameText;
+    [SerializeField] private TMP_Text m_characterText;
+
+    private const float TypingSpeed = 0.02f;
+
+    private CharacterData m_currentCharacter;
+    private bool m_skipped = false;
+
+    private void Start()
+    {
+        PopulateQuestionButtons();
+    }
+
+    public void Setup(CharacterData characterData)
+    {
+        Cleanup();
+
+        m_currentCharacter = characterData;
+        m_characterNameText.text = characterData.name;
+
+        // TODO: will this be changed with an introductory text?
+        m_characterText.text = "Select an option...";
+    }
+
+    private void Cleanup()
+    {
+        m_skipped = false;
+        m_characterText.text = "";
+
+        StopAllCoroutines();
+    }
+
+    // Populates the questions the player can ask the NPC.
+    private void PopulateQuestionButtons()
+    {
+        for (int i = 0; i < QuestionData.Questions.Length; i++)
+        {
+            var buttonObj = Instantiate(m_questionButton, m_questionHolder);
+            
+            // Sets the button text to the question text.
+            var buttonText = buttonObj.GetComponentInChildren<TMP_Text>();
+            buttonText.text = QuestionData.Questions[i];
+
+            var button = buttonObj.GetComponent<Button>();
+            button.onClick.AddListener(() => OnQuestionButtonClicked(i));
+        }
+    }
+
+    private IEnumerator DisplayText(string text)
+    {
+        // Hide the questions whilst the character is talking.
+        m_questionHolder.gameObject.SetActive(false);
+
+        foreach (char letter in text.ToCharArray())
+        {
+            if (m_skipped)
+            {
+                break;
+            }
+
+            m_characterText.text += letter;
+            yield return new WaitForSeconds(TypingSpeed);
+        }
+
+        m_skipped = true;
+        m_characterText.text = text;
+
+        // Re-enable the questions.
+        m_questionHolder.gameObject.SetActive(true);
+    }
+
+    // Handles displaying the correct dialogue for the question.
+    private void OnQuestionButtonClicked(int index)
+    {
+        Debug.Log("Player picked option " + index);
+
+        Cleanup();
+
+        var dialogueOption = m_currentCharacter.m_dialogueOptions[index];
+        StartCoroutine(DisplayText(dialogueOption.text));
+
+        // TODO: we should update the sheet with this information.
+    }
+}