using System.Collections.Generic;
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using Core.Game;
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using Core.UI;
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using TowerDefense.Game;
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using UnityEngine;
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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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/// A manager for the level select user interface
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/// </summary>
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public class LevelSelectScreen : SimpleMainMenuPage
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{
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/// <summary>
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/// The button to instantiate that
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/// represents the level select buttons
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/// </summary>
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public LevelSelectButton selectionPrefab;
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/// <summary>
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/// The layout group to instantiate the buttons in
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/// </summary>
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public LayoutGroup layout;
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/// <summary>
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/// A buffer for the levels panel
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/// </summary>
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public Transform rightBuffer;
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public Button backButton;
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public MouseScroll mouseScroll;
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public Animation cameraAnimator;
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public string enterCameraAnim;
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public string exitCameraAnim;
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/// <summary>
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/// The reference to the list of levels to display
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/// </summary>
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protected LevelList m_LevelList;
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protected List<Button> m_Buttons = new List<Button>();
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/// <summary>
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/// Instantiate the buttons
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/// </summary>
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protected virtual void Start()
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{
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if (GameManager.instance == null)
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{
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return;
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}
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m_LevelList = GameManager.instance.levelList;
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if (layout == null || selectionPrefab == null || m_LevelList == null)
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{
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return;
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}
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int amount = m_LevelList.Count;
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for (int i = 0; i < amount; i++)
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{
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LevelSelectButton button = CreateButton(m_LevelList[i]);
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button.transform.SetParent(layout.transform);
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button.transform.localScale = Vector3.one;
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m_Buttons.Add(button.GetComponent<Button>());
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}
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if (rightBuffer != null)
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{
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rightBuffer.SetAsLastSibling();
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}
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for (int index = 1; index < m_Buttons.Count - 1; index++)
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{
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Button button = m_Buttons[index];
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SetUpNavigation(button, m_Buttons[index - 1], m_Buttons[index + 1]);
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}
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SetUpNavigation(m_Buttons[0], backButton, m_Buttons[1]);
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SetUpNavigation(m_Buttons[m_Buttons.Count - 1], m_Buttons[m_Buttons.Count - 2], null);
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mouseScroll.SetHasRightBuffer(rightBuffer != null);
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}
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/// <summary>
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/// Create and Initialise a Level select button based on item
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/// </summary>
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/// <param name="item">
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/// The level data
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/// </param>
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/// <returns>
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/// The initialised button
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/// </returns>
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protected LevelSelectButton CreateButton(LevelItem item)
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{
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LevelSelectButton button = Instantiate(selectionPrefab);
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button.Initialize(item, mouseScroll);
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return button;
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}
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/// <summary>
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/// Play camera animations
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/// </summary>
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public override void Show()
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{
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base.Show();
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if (cameraAnimator != null && enterCameraAnim != null)
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{
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cameraAnimator.Play(enterCameraAnim);
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}
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}
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/// <summary>
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/// Return camera to normal position
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/// </summary>
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public override void Hide()
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{
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base.Hide();
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if (cameraAnimator != null && exitCameraAnim != null)
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{
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cameraAnimator.Play(exitCameraAnim);
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}
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}
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/// <summary>
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/// Sets up the navigation for a selectable
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/// </summary>
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/// <param name="selectable">Selectable to set up</param>
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/// <param name="left">Select on left</param>
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/// <param name="right">Select on right</param>
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void SetUpNavigation(Selectable selectable, Selectable left, Selectable right)
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{
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Navigation navigation = selectable.navigation;
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navigation.selectOnLeft = left;
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navigation.selectOnRight = right;
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selectable.navigation = navigation;
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}
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}
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}
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