73 lines
2.4 KiB
C#
73 lines
2.4 KiB
C#
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using System;
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using UnityEngine;
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namespace UnityEditor.U2D.Animation
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{
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internal class RectSelectionTool<T>
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{
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private int m_HashCode = "RectSelectionTool".GetHashCode();
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private int m_ControlID = -1;
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private bool m_Moved = false;
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private RectSlider m_RectSlider = new RectSlider();
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public int controlID => m_ControlID;
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public IRectSelector<T> rectSelector { get; set; }
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public ICacheUndo cacheUndo { get; set; }
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public Action onSelectionStart = () => { };
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public Action onSelectionUpdate = () => { };
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public Action onSelectionEnd = () => { };
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public void OnGUI()
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{
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Debug.Assert(rectSelector != null);
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Debug.Assert(cacheUndo != null);
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m_ControlID = GUIUtility.GetControlID(m_HashCode, FocusType.Passive);
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Event ev = Event.current;
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EventType eventType = ev.GetTypeForControl(m_ControlID);
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if (GUIUtility.hotControl == 0 && HandleUtility.nearestControl == m_ControlID &&
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rectSelector.selection.Count > 0 && eventType == EventType.MouseDown && ev.button == 0 && !ev.alt)
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{
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m_Moved = false;
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onSelectionStart();
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}
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if (m_Moved && GUIUtility.hotControl == m_ControlID && eventType == EventType.MouseUp && ev.button == 0)
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{
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cacheUndo.BeginUndoOperation(TextContent.selection);
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rectSelector.selection.EndSelection(true);
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onSelectionEnd();
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}
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EditorGUI.BeginChangeCheck();
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rectSelector.rect = m_RectSlider.Do(m_ControlID);
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if (EditorGUI.EndChangeCheck())
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{
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if (!m_Moved)
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{
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cacheUndo.BeginUndoOperation(TextContent.selection);
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if (!ev.shift)
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rectSelector.selection.Clear();
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m_Moved = true;
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}
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rectSelector.selection.BeginSelection();
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rectSelector.Select();
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onSelectionUpdate();
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}
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if (eventType == EventType.Repaint && GUIUtility.hotControl == m_ControlID)
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{
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DrawingUtility.DrawRect(rectSelector.rect, Vector3.zero, Quaternion.identity, new Color(0f, 1f, 1f, 1f), 0.05f, 0.8f);
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}
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}
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}
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}
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