using UnityEngine;
using UnityEditor;


/// <summary>
/// Draws a vector2 field for vector properties.
/// Usage: [ShowAsVector2] _Vector2("Vector 2", Vector) = (0,0,0,0)
/// </summary>
public class ShowAsVector2Drawer : MaterialPropertyDrawer
{
	public override void OnGUI(Rect position, MaterialProperty prop, GUIContent label, MaterialEditor editor)
	{
		if (prop.type == MaterialProperty.PropType.Vector)
		{
			EditorGUIUtility.labelWidth = 0f;
			EditorGUIUtility.fieldWidth = 0f;

			if (!EditorGUIUtility.wideMode)
			{
				EditorGUIUtility.wideMode = true;
				EditorGUIUtility.labelWidth = EditorGUIUtility.currentViewWidth - 212;
			}

			EditorGUI.BeginChangeCheck();
			EditorGUI.showMixedValue = prop.hasMixedValue;
			Vector4 vec = EditorGUI.Vector2Field(position, label, prop.vectorValue);
			if (EditorGUI.EndChangeCheck())
			{
				prop.vectorValue = vec;
			}
		}
		else
			editor.DefaultShaderProperty(prop, label.text);

	}
}