using Core.Game;
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using TowerDefense.Game;
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using UnityEngine;
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using UnityEngine.EventSystems;
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using UnityEngine.SceneManagement;
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using UnityEngine.UI;
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namespace TowerDefense.UI
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{
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/// <summary>
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/// The button for selecting a level
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/// </summary>
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[RequireComponent(typeof(Button))]
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public class LevelSelectButton : MonoBehaviour, ISelectHandler
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{
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/// <summary>
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/// Reference to the required button component
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/// </summary>
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protected Button m_Button;
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/// <summary>
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/// The UI text element that displays the name of the level
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/// </summary>
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public Text titleDisplay;
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public Text description;
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public Sprite starAchieved;
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public Image[] stars;
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protected MouseScroll m_MouseScroll;
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/// <summary>
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/// The data concerning the level this button displays
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/// </summary>
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protected LevelItem m_Item;
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/// <summary>
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/// When the user clicks the button, change the scene
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/// </summary>
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public void ButtonClicked()
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{
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ChangeScenes();
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}
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/// <summary>
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/// A method for assigning the data from item to the button
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/// </summary>
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/// <param name="item">
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/// The data with the information concerning the level
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/// </param>
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public void Initialize(LevelItem item, MouseScroll mouseScroll)
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{
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LazyLoad();
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if (titleDisplay == null)
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{
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return;
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}
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m_Item = item;
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titleDisplay.text = item.name;
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description.text = item.description;
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HasPlayedState();
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m_MouseScroll = mouseScroll;
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}
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/// <summary>
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/// Configures the feedback concerning if the player has played
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/// </summary>
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protected void HasPlayedState()
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{
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GameManager gameManager = GameManager.instance;
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if (gameManager == null)
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{
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return;
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}
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int starsForLevel = gameManager.GetStarsForLevel(m_Item.id);
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for (int i = 0; i < starsForLevel; i++)
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{
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stars[i].sprite = starAchieved;
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}
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}
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/// <summary>
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/// Changes the scene to the scene name provided by m_Item
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/// </summary>
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protected void ChangeScenes()
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{
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SceneManager.LoadScene(m_Item.sceneName);
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}
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/// <summary>
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/// Ensure <see cref="m_Button"/> is not null
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/// </summary>
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protected void LazyLoad()
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{
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if (m_Button == null)
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{
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m_Button = GetComponent<Button>();
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}
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}
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/// <summary>
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/// Remove all listeners on the button before destruction
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/// </summary>
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protected void OnDestroy()
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{
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if (m_Button != null)
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{
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m_Button.onClick.RemoveAllListeners();
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}
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}
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/// <summary>
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/// Implementation of ISelectHandler
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/// </summary>
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/// <param name="eventData">Select event data</param>
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public void OnSelect(BaseEventData eventData)
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{
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m_MouseScroll.SelectChild(this);
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}
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}
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}
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