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kurtdekker/ConditionalHideAttribute.cs

Forked from sebtoun/ConditionalHideAttribute.cs
Created April 30, 2022 18:12
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  1. @sebtoun sebtoun created this gist Mar 27, 2018.
    20 changes: 20 additions & 0 deletions ConditionalHideAttribute.cs
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    using UnityEngine;
    using System;

    //Original version of the ConditionalHideAttribute created by Brecht Lecluyse (www.brechtos.com)
    //Modified by: -

    [ AttributeUsage( AttributeTargets.Field ) ]
    public class ConditionalHideAttribute : PropertyAttribute
    {
    public readonly string ConditionalSourceField;
    public string ConditionalSourceField2 = "";
    public bool HideInInspector = false;
    public bool Inverse = false;

    // Use this for initialization
    public ConditionalHideAttribute( string conditionalSourceField )
    {
    ConditionalSourceField = conditionalSourceField;
    }
    }
    104 changes: 104 additions & 0 deletions ConditionalHidePropertyDrawer.cs
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    using UnityEngine;
    using UnityEditor;

    //Original version of the ConditionalHideAttribute created by Brecht Lecluyse (www.brechtos.com)
    //Modified by: -

    [ CustomPropertyDrawer( typeof( ConditionalHideAttribute ) ) ]
    public class ConditionalHidePropertyDrawer : PropertyDrawer
    {
    public override void OnGUI( Rect position, SerializedProperty property, GUIContent label )
    {
    var condHAtt = (ConditionalHideAttribute) attribute;
    var enabled = GetConditionalHideAttributeResult( condHAtt, property );

    var wasEnabled = GUI.enabled;
    GUI.enabled = enabled;
    if ( !condHAtt.HideInInspector || enabled )
    {
    EditorGUI.PropertyField( position, property, label, true );
    }

    GUI.enabled = wasEnabled;
    }

    public override float GetPropertyHeight( SerializedProperty property, GUIContent label )
    {
    var condHAtt = (ConditionalHideAttribute) attribute;
    var enabled = GetConditionalHideAttributeResult( condHAtt, property );

    if ( !condHAtt.HideInInspector || enabled )
    {
    return EditorGUI.GetPropertyHeight( property, label );
    }
    else
    {
    //The property is not being drawn
    //We want to undo the spacing added before and after the property
    return -EditorGUIUtility.standardVerticalSpacing;
    }
    }

    private bool GetConditionalHideAttributeResult( ConditionalHideAttribute condHAtt, SerializedProperty property )
    {
    var enabled = true;

    var propertyPath =
    property.propertyPath; //returns the property path of the property we want to apply the attribute to
    string conditionPath;

    if ( !string.IsNullOrEmpty( condHAtt.ConditionalSourceField ) )
    {
    //Get the full relative property path of the sourcefield so we can have nested hiding
    conditionPath =
    propertyPath.Replace( property.name,
    condHAtt.ConditionalSourceField ); //changes the path to the conditionalsource property path
    var sourcePropertyValue = property.serializedObject.FindProperty( conditionPath );

    if ( sourcePropertyValue != null )
    {
    enabled = CheckPropertyType( sourcePropertyValue );
    }
    else
    {
    //Debug.LogWarning("Attempting to use a ConditionalHideAttribute but no matching SourcePropertyValue found in object: " + condHAtt.ConditionalSourceField);
    }
    }

    if ( !string.IsNullOrEmpty( condHAtt.ConditionalSourceField2 ) )
    {
    conditionPath =
    propertyPath.Replace( property.name,
    condHAtt.ConditionalSourceField2 ); //changes the path to the conditionalsource property path
    var sourcePropertyValue2 = property.serializedObject.FindProperty( conditionPath );

    if ( sourcePropertyValue2 != null )
    {
    enabled = enabled && CheckPropertyType( sourcePropertyValue2 );
    }
    else
    {
    //Debug.LogWarning("Attempting to use a ConditionalHideAttribute but no matching SourcePropertyValue found in object: " + condHAtt.ConditionalSourceField);
    }
    }

    if ( condHAtt.Inverse ) enabled = !enabled;

    return enabled;
    }

    private bool CheckPropertyType( SerializedProperty sourcePropertyValue )
    {
    switch ( sourcePropertyValue.propertyType )
    {
    case SerializedPropertyType.Boolean:
    return sourcePropertyValue.boolValue;
    case SerializedPropertyType.ObjectReference:
    return sourcePropertyValue.objectReferenceValue != null;
    default:
    Debug.LogError( "Data type of the property used for conditional hiding [" +
    sourcePropertyValue.propertyType + "] is currently not supported" );
    return true;
    }
    }
    }