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154 lines
5.7 KiB
154 lines
5.7 KiB
namespace VRTK.Examples.PanelMenu
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{
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using UnityEngine;
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using UnityEngine.UI;
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/// <summary>
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/// Demo GridLayoutGroup component that subscribes to PanelMenuItemController events.
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/// </summary>
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/// <example>
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/// See the demo scene for a complete example: [ 040_Controls_Panel_Menu ]
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/// </example>
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public class PanelMenuUIGrid : MonoBehaviour
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{
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#region Variables
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public enum Direction
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{
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None,
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Up,
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Down,
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Left,
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Right
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}
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private readonly Color colorDefault = Color.white;
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private readonly Color colorSelected = Color.green;
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private readonly float colorAlpha = 0.25f;
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private GridLayoutGroup gridLayoutGroup;
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private int selectedIndex = 0;
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#endregion Variables
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#region Unity Methods
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private void Start()
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{
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gridLayoutGroup = GetComponent<GridLayoutGroup>();
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if (gridLayoutGroup == null)
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{
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VRTK_Logger.Warn(VRTK_Logger.GetCommonMessage(VRTK_Logger.CommonMessageKeys.REQUIRED_COMPONENT_MISSING_FROM_GAMEOBJECT, "PanelMenuUIGrid", "GridLayoutGroup", "the same"));
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return;
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}
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GetComponentInParent<VRTK_PanelMenuItemController>().PanelMenuItemSwipeTop += new PanelMenuItemControllerEventHandler(OnPanelMenuItemSwipeTop);
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GetComponentInParent<VRTK_PanelMenuItemController>().PanelMenuItemSwipeBottom += new PanelMenuItemControllerEventHandler(OnPanelMenuItemSwipeBottom);
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GetComponentInParent<VRTK_PanelMenuItemController>().PanelMenuItemSwipeLeft += new PanelMenuItemControllerEventHandler(OnPanelMenuItemSwipeLeft);
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GetComponentInParent<VRTK_PanelMenuItemController>().PanelMenuItemSwipeRight += new PanelMenuItemControllerEventHandler(OnPanelMenuItemSwipeRight);
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GetComponentInParent<VRTK_PanelMenuItemController>().PanelMenuItemTriggerPressed += new PanelMenuItemControllerEventHandler(OnPanelMenuItemTriggerPressed);
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SetGridLayoutItemSelectedState(selectedIndex);
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}
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#endregion Unity Methods
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#region Interation
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public bool MoveSelectGridLayoutItem(Direction direction, GameObject interactableObject)
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{
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int newIndex = FindNextItemBasedOnMoveDirection(direction);
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if (newIndex != selectedIndex)
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{
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SetGridLayoutItemSelectedState(newIndex);
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selectedIndex = newIndex;
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}
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return true;
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}
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private int FindNextItemBasedOnMoveDirection(Direction direction)
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{
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float width = gridLayoutGroup.preferredWidth;
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float cellWidth = gridLayoutGroup.cellSize.x;
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float spacing = gridLayoutGroup.spacing.x;
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int cellsAccross = (int)Mathf.Floor(width / (cellWidth + (spacing / 2))); // quick / dirty
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int childCount = gridLayoutGroup.transform.childCount;
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switch (direction)
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{
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case Direction.Up:
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int nextUp = selectedIndex - cellsAccross;
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return (nextUp >= 0) ? nextUp : selectedIndex;
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case Direction.Down:
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int nextDown = selectedIndex + cellsAccross;
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return (nextDown < childCount) ? nextDown : selectedIndex;
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case Direction.Left:
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int nextLeft = selectedIndex - 1;
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return (nextLeft >= 0) ? nextLeft : selectedIndex;
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case Direction.Right:
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int nextRight = selectedIndex + 1;
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return (nextRight < childCount) ? nextRight : selectedIndex;
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default:
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return selectedIndex;
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}
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}
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private void SetGridLayoutItemSelectedState(int index)
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{
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foreach (Transform childTransform in gridLayoutGroup.transform)
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{
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var child = childTransform.gameObject;
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if (child != null)
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{
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Color color = colorDefault;
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color.a = colorAlpha;
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child.GetComponent<Image>().color = color;
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}
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}
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var selected = gridLayoutGroup.transform.GetChild(index);
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if (selected != null)
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{
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Color color = colorSelected;
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color.a = colorAlpha;
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selected.GetComponent<Image>().color = color;
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}
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}
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#endregion Interaction
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#region UI Events
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private void OnPanelMenuItemSwipeTop(object sender, PanelMenuItemControllerEventArgs e)
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{
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MoveSelectGridLayoutItem(Direction.Up, e.interactableObject);
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}
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private void OnPanelMenuItemSwipeBottom(object sender, PanelMenuItemControllerEventArgs e)
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{
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MoveSelectGridLayoutItem(Direction.Down, e.interactableObject);
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}
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private void OnPanelMenuItemSwipeLeft(object sender, PanelMenuItemControllerEventArgs e)
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{
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MoveSelectGridLayoutItem(Direction.Left, e.interactableObject);
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}
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private void OnPanelMenuItemSwipeRight(object sender, PanelMenuItemControllerEventArgs e)
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{
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MoveSelectGridLayoutItem(Direction.Right, e.interactableObject);
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}
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private void OnPanelMenuItemTriggerPressed(object sender, PanelMenuItemControllerEventArgs e)
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{
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SendMessageToInteractableObject(e.interactableObject);
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}
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private void SendMessageToInteractableObject(GameObject interactableObject)
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{
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interactableObject.SendMessage("UpdateGridLayoutValue", selectedIndex);
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}
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#endregion UI Events
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}
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}
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