forked from BilalY/Rasagar
126 lines
4.3 KiB
C#
126 lines
4.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using UnityEngine.EventSystems;
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using UnityEngine.UI;
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namespace UnityEngine.UIElements
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{
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// This code is disabled unless the UI Toolkit package or the com.unity.modules.uielements module are present.
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// The UIElements module is always present in the Editor but it can be stripped from a project build if unused.
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#if PACKAGE_UITOOLKIT
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/// <summary>
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/// A derived BaseRaycaster to raycast against UI Toolkit panel instances at runtime.
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/// </summary>
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[AddComponentMenu("UI Toolkit/Panel Raycaster (UI Toolkit)")]
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public class PanelRaycaster : BaseRaycaster, IRuntimePanelComponent
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{
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private BaseRuntimePanel m_Panel;
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/// <summary>
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/// The panel that this component relates to. If panel is null, this component will have no effect.
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/// Will be set to null automatically if panel is Disposed from an external source.
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/// </summary>
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public IPanel panel
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{
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get => m_Panel;
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set
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{
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var newPanel = (BaseRuntimePanel)value;
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if (m_Panel != newPanel)
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{
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UnregisterCallbacks();
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m_Panel = newPanel;
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RegisterCallbacks();
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}
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}
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}
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void RegisterCallbacks()
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{
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if (m_Panel != null)
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{
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m_Panel.destroyed += OnPanelDestroyed;
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}
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}
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void UnregisterCallbacks()
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{
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if (m_Panel != null)
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{
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m_Panel.destroyed -= OnPanelDestroyed;
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}
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}
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void OnPanelDestroyed()
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{
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panel = null;
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}
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private GameObject selectableGameObject => m_Panel?.selectableGameObject;
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public override int sortOrderPriority => Mathf.FloorToInt(m_Panel?.sortingPriority ?? 0f);
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public override int renderOrderPriority => int.MaxValue - (UIElementsRuntimeUtility.s_ResolvedSortingIndexMax - (m_Panel?.resolvedSortingIndex ?? 0));
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public override void Raycast(PointerEventData eventData, List<RaycastResult> resultAppendList)
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{
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if (m_Panel == null)
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return;
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var displayIndex = m_Panel.targetDisplay;
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Vector3 eventPosition = MultipleDisplayUtilities.GetRelativeMousePositionForRaycast(eventData);
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// Discard events that are not part of this display so the user does not interact with multiple displays at once.
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if ((int) eventPosition.z != displayIndex)
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return;
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var position = eventPosition;
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var delta = eventData.delta;
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float h = Screen.height;
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if (displayIndex > 0 && displayIndex < Display.displays.Length)
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{
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h = Display.displays[displayIndex].systemHeight;
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}
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position.y = h - position.y;
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delta.y = -delta.y;
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var eventSystem = UIElementsRuntimeUtility.activeEventSystem as EventSystem;
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if (eventSystem == null || eventSystem.currentInputModule == null)
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return;
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var pointerId = eventSystem.currentInputModule.ConvertUIToolkitPointerId(eventData);
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var capturingElement = m_Panel.GetCapturingElement(pointerId);
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if (capturingElement is VisualElement ve && ve.panel != m_Panel)
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return;
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var capturingPanel = PointerDeviceState.GetPlayerPanelWithSoftPointerCapture(pointerId);
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if (capturingPanel != null && capturingPanel != m_Panel)
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return;
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if (capturingElement == null && capturingPanel == null)
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{
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if (!m_Panel.ScreenToPanel(position, delta, out var panelPosition, out _))
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return;
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var pick = m_Panel.Pick(panelPosition);
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if (pick == null)
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return;
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}
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resultAppendList.Add(new RaycastResult
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{
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gameObject = selectableGameObject,
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module = this,
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screenPosition = eventPosition,
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displayIndex = m_Panel.targetDisplay,
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});
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}
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public override Camera eventCamera => null;
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}
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#endif
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}
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