ScriptableRenderPipeline/ScriptableRenderPipeline/Core/CoreRP/Editor/Volume/Drawers/IntParameterDrawer.cs

using UnityEngine;
using UnityEngine.Experimental.Rendering;

namespace UnityEditor.Experimental.Rendering
{
    [VolumeParameterDrawer(typeof(MinIntParameter))]
    sealed class MinIntParameterDrawer : VolumeParameterDrawer
    {
        public override bool OnGUI(SerializedDataParameter parameter, GUIContent title)
        {
            var value = parameter.value;

            if (value.propertyType != SerializedPropertyType.Integer)
                return false;

            var o = parameter.GetObjectRef<MinIntParameter>();
            int v = EditorGUILayout.IntField(title, value.intValue);
            value.intValue = Mathf.Max(v, o.min);
            return true;
        }
    }

    [VolumeParameterDrawer(typeof(NoInterpMinIntParameter))]
    sealed class NoInterpMinIntParameterDrawer : VolumeParameterDrawer
    {
        public override bool OnGUI(SerializedDataParameter parameter, GUIContent title)
        {
            var value = parameter.value;

            if (value.propertyType != SerializedPropertyType.Integer)
                return false;

            var o = parameter.GetObjectRef<NoInterpMinIntParameter>();
            int v = EditorGUILayout.IntField(title, value.intValue);
            value.intValue = Mathf.Max(v, o.min);
            return true;
        }
    }

    [VolumeParameterDrawer(typeof(MaxIntParameter))]
    sealed class MaxIntParameterDrawer : VolumeParameterDrawer
    {
        public override bool OnGUI(SerializedDataParameter parameter, GUIContent title)
        {
            var value = parameter.value;

            if (value.propertyType != SerializedPropertyType.Integer)
                return false;

            var o = parameter.GetObjectRef<MaxIntParameter>();
            int v = EditorGUILayout.IntField(title, value.intValue);
            value.intValue = Mathf.Min(v, o.max);
            return true;
        }
    }

    [VolumeParameterDrawer(typeof(NoInterpMaxIntParameter))]
    sealed class NoInterpMaxIntParameterDrawer : VolumeParameterDrawer
    {
        public override bool OnGUI(SerializedDataParameter parameter, GUIContent title)
        {
            var value = parameter.value;

            if (value.propertyType != SerializedPropertyType.Integer)
                return false;

            var o = parameter.GetObjectRef<NoInterpMaxIntParameter>();
            int v = EditorGUILayout.IntField(title, value.intValue);
            value.intValue = Mathf.Min(v, o.max);
            return true;
        }
    }

    [VolumeParameterDrawer(typeof(ClampedIntParameter))]
    sealed class ClampedIntParameterDrawer : VolumeParameterDrawer
    {
        public override bool OnGUI(SerializedDataParameter parameter, GUIContent title)
        {
            var value = parameter.value;

            if (value.propertyType != SerializedPropertyType.Integer)
                return false;

            var o = parameter.GetObjectRef<ClampedIntParameter>();
            EditorGUILayout.IntSlider(value, o.min, o.max, title);
            value.intValue = Mathf.Clamp(value.intValue, o.min, o.max);
            return true;
        }
    }

    [VolumeParameterDrawer(typeof(NoInterpClampedIntParameter))]
    sealed class NoInterpClampedIntParameterDrawer : VolumeParameterDrawer
    {
        public override bool OnGUI(SerializedDataParameter parameter, GUIContent title)
        {
            var value = parameter.value;

            if (value.propertyType != SerializedPropertyType.Integer)
                return false;

            var o = parameter.GetObjectRef<NoInterpClampedIntParameter>();
            EditorGUILayout.IntSlider(value, o.min, o.max, title);
            value.intValue = Mathf.Clamp(value.intValue, o.min, o.max);
            return true;
        }
    }
}