Code running pack! two property drawing scripts that make it super easy to trigger code via buttons in the inspector, and get feedback! [TestButton] draws you little buttons that call a method on your MonoBehaviour, and [ProgressBar] give you a great way to show feedback from long running methods. These are *super* helpful for things like proced…

demo.gif

InspectorButtonsTest.cs

using UnityEngine;
using System.Collections;

public class InspectorButtonsTest : MonoBehaviour
{
    [TestButton("Generate world", "DoProcGen", isActiveInEditor = false)]
    [TestButton("Clear world", "ClearWorld", 2, isActiveInEditor = false)]
    [ProgressBar(hideWhenZero = true, label = "procGenFeedback")]
    public float procgenProgress = -1;

    [HideInInspector]
    public string procGenFeedback;

    // Silly little enumerator to test progress bars~
    IEnumerator DoProcGen()
    {
        // lets pretend we have some code here that procedurally generates a map
        procGenFeedback = "Initilizing";
        procgenProgress = 0.01f;
        yield return new WaitForSeconds(0.25f);
        procGenFeedback = "Seeding terrain";
        procgenProgress = 0.2f;
        yield return new WaitForSeconds(0.25f);
        procGenFeedback = "Plotting cities";
        procgenProgress = 0.4f;
        yield return new WaitForSeconds(0.25f);
        procGenFeedback = "Drawing roads";
        procgenProgress = 0.6f;
        yield return new WaitForSeconds(0.25f);
        procGenFeedback = "Reticulating splines";
        procgenProgress = 0.8f;
        yield return new WaitForSeconds(0.25f);
        procGenFeedback = "Finalizing";
        procgenProgress = 0.9f;
        yield return new WaitForSeconds(0.25f);
        procGenFeedback = "DONE in 6 seconds";
        procgenProgress = 1f;
    }

    // resets values
    void ClearWorld()
    {
        procgenProgress = 0;
    }
}

ProgressBarAttribute.cs

using UnityEngine;

public class ProgressBarAttribute : PropertyAttribute
{
    public bool hideWhenZero;
    public string label;
}

ProgressBarDrawer.cs

using UnityEngine;
using UnityEditor;

[CustomPropertyDrawer(typeof(ProgressBarAttribute))]
public class ProgressBarDrawer : PropertyDrawer
{
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        if (property.propertyType != SerializedPropertyType.Float)
        {
            GUI.Label(position, "ERROR: can only apply progress bar onto a float");
            return;
        }

        if ((attribute as ProgressBarAttribute).hideWhenZero && property.floatValue <= 0)
            return;

        var dynamicLabel = property.serializedObject.FindProperty((attribute as ProgressBarAttribute).label);

        EditorGUI.ProgressBar(position, property.floatValue/1f, dynamicLabel == null ? property.name : dynamicLabel.stringValue);
    }

    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
    {
        if ((attribute as ProgressBarAttribute).hideWhenZero && property.floatValue <= 0)
            return 0;

        return base.GetPropertyHeight(property, label);
    }
}

TestButtonAttribute.cs

// NOTE DONT put in an editor folder

using UnityEngine;
using System;

[AttributeUsage(AttributeTargets.Field, Inherited = true, AllowMultiple = true)]
public class TestButtonAttribute : PropertyAttribute
{
    public string buttonLabel;
    public string methodName;

    // Set this false to make the button not work whilst in playmode
    public bool isActiveAtRuntime = true;
    // Set this to false to make the button not work when the game isnt running
    public bool isActiveInEditor = true;
    
    public TestButtonAttribute(string buttonLabel, string methodName, int order = 1)
    {
        this.buttonLabel = buttonLabel;
        this.methodName = methodName;

        this.order = order; // Defualt the order to 1 so this can draw under headder attribles
    }
}

TestButtonDrawer.cs

// NOTE put in a Editor folder

using UnityEngine;
using UnityEditor;

[CustomPropertyDrawer(typeof(TestButtonAttribute))]
public class TestButtonDrawer : DecoratorDrawer
{
    public override void OnGUI(Rect position)
    {
        // cast the attribute to make it easier to work with
        var buttonAttribute = (attribute as TestButtonAttribute);

        // check if the button is supposed to be enabled right now
        if (EditorApplication.isPlaying && !buttonAttribute.isActiveAtRuntime)
            GUI.enabled = false;
        if (!EditorApplication.isPlaying && !buttonAttribute.isActiveInEditor)
            GUI.enabled = false;

        // figure out where were drawing the button
        var pos = new Rect(position.x, position.y, position.width, position.height - EditorGUIUtility.standardVerticalSpacing);
        // draw it and if its clicked...
        if (GUI.Button(pos, buttonAttribute.buttonLabel))
        {
            // tell the current game object to find and run the method we asked for!
            Selection.activeGameObject.BroadcastMessage(buttonAttribute.methodName);
        }

        // make sure the GUI is enabled when were done!
        GUI.enabled = true;
    }

    public override float GetHeight()
    {
        return EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing*2;
    }
}

@Flassari Yes, you need to be careful with naming your methods!

Vote here to fix the error generated by GameObject.BroadcastMessage(): https://issuetracker.unity3d.com/issues/assertion-failed-on-expression-shouldrunbehaviour-error-is-thrown-when-prefab-with-custom-script-is-edited