79 lines
3.5 KiB
C#
79 lines
3.5 KiB
C#
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using UnityEngine;
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namespace UnityEditor.U2D.Animation
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{
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internal class Slider2D
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{
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private static Vector2 s_CurrentMousePosition;
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private static Vector2 s_DragStartScreenPosition;
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private static Vector2 s_DragScreenOffset;
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private static double s_Time;
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public static Vector2 Do(int controlID, Vector2 position, Handles.CapFunction drawCapFunction = null)
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{
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EventType type = Event.current.GetTypeForControl(controlID);
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switch (type)
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{
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case EventType.MouseDown:
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if (Event.current.button == 0 && HandleUtility.nearestControl == controlID && !Event.current.alt)
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{
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s_Time = EditorApplication.timeSinceStartup;
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GUIUtility.keyboardControl = controlID;
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GUIUtility.hotControl = controlID;
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s_CurrentMousePosition = Event.current.mousePosition;
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s_DragStartScreenPosition = Event.current.mousePosition;
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Vector2 b = HandleUtility.WorldToGUIPoint(position);
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s_DragScreenOffset = s_CurrentMousePosition - b;
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Event.current.Use();
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}
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break;
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case EventType.MouseUp:
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if (GUIUtility.hotControl == controlID && (Event.current.button == 0 || Event.current.button == 2))
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{
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GUIUtility.hotControl = 0;
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Event.current.Use();
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}
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break;
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case EventType.MouseDrag:
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if (GUIUtility.hotControl == controlID)
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{
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s_CurrentMousePosition = Event.current.mousePosition;
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float screenDisplacement = (s_CurrentMousePosition - s_DragStartScreenPosition).magnitude;
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Vector2 center = position;
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Vector2 screenPosition = s_CurrentMousePosition - s_DragScreenOffset;
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position = Handles.inverseMatrix.MultiplyPoint(screenPosition);
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float displacement = (center - position).magnitude;
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if (!Mathf.Approximately(displacement, 0f) && (EditorApplication.timeSinceStartup - s_Time > 0.15 || screenDisplacement >= 10f))
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GUI.changed = true;
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Event.current.Use();
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}
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break;
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case EventType.KeyDown:
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if (GUIUtility.hotControl == controlID && Event.current.keyCode == KeyCode.Escape)
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{
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position = Handles.inverseMatrix.MultiplyPoint(s_DragStartScreenPosition - s_DragScreenOffset);
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GUIUtility.hotControl = 0;
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GUI.changed = true;
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Event.current.Use();
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}
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break;
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case EventType.Layout:
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if (drawCapFunction != null)
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drawCapFunction(controlID, position, Quaternion.identity, 1f, EventType.Layout);
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break;
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case EventType.Repaint:
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if (drawCapFunction != null)
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drawCapFunction(controlID, position, Quaternion.identity, 1f, EventType.Repaint);
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break;
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}
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return position;
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}
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}
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}
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