Looking for a Simple EditorGUI.DropdownButton example

Unity Engine
1

Just looking for a simple EditorGUI.DropdownButton with 3 option printing something different depending on what was selected.

1 Like
2

You can just use

EditorGUILayout.Popup(string label, int selectedIndex, string[ ] displayedOptions);
or
EditorGUI.Popup(Rect position, int selectedIndex, GUIContent[ ] displayedOptions, GUIStyle style = EditorStyles.popup);

//Example

int         _selected   = 0;
string[]    _options    = new string[3] { "Item1", "Item2", "Item3" };

public override void OnInspectorGUI()
{
    EditorGUI.BeginChangeCheck();

    this._selected = EditorGUILayout.Popup("My Simple Dropdown", _selected, _options);

    if (EditorGUI.EndChangeCheck())
    {
        Debug.Log(_options[_selected]);
    }
}

For more info:

4 Likes
3

Perfect thank you

4

Was wondering the same thing, but found out how to use it, so leaving it here in case someone need that in the future:

public static void DrawDropdown(Rect position, GUIContent label)
{
    if (!EditorGUI.DropdownButton(position, label, FocusType.Passive))
    {
        return;
    }

    void handleItemClicked(object parameter)
    {
        Debug.Log(paramater);
    }

    GenericMenu menu = new GenericMenu();
    menu.AddItem(new GUIContent("Item 1"), false, handleItemClicked, "Item 1");
    menu.AddItem(new GUIContent("Item 2"), false, handleItemClicked, "Item 2");
    menu.AddItem(new GUIContent("Item 3"), false, handleItemClicked, "Item 3");
    menu.DropDown(position);
}
16 Likes
5

Cross posting for google results. The EditorGUI.Popup is what one wants for situations like this. I have a selection from my database that works in a propertyDrawer:

using UnityEditor;
using UnityEngine;
[CustomPropertyDrawer(typeof(ArmorType))]
public class ArmorTypeDrawerUGUI : PropertyDrawer
{
    int armorTypeIndex = 0;
    SerializedProperty targetProperty;
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        DamageTable.Init();
        var armorTypes = DamageTable.ArmorNames();
        targetProperty = property.FindPropertyRelative("reference");
        armorTypeIndex = targetProperty.intValue;
        armorTypeIndex = EditorGUI.Popup(position, armorTypeIndex, armorTypes);
        targetProperty.intValue = armorTypeIndex;
    }
}
2 Likes
6

Posting for google results, as this killed an afternoon for me. EditorGUI.popup is extremely limited as it has no events and only triggers on a change. This makes it completely useless if you’re programatically changing the menu. I’d suggest any fellow newbs out there get to know how to use the dropdown menu’s as brunocoimbra suggested.

3 Likes
7

Very similar to @brunocoimbra 's solution above, tho I used menu.ShowAsContextI(); to avoid having to pass in the position Rect:

...
var enumValues = Enum.GetValues(typeof(OptionTypes));
menu = new GenericMenu();
menu.AddItem(new GUIContent($"{enumValues}"), false, AddNewDropdownCallback, enumValues);

...

if (EditorGUILayout.DropdownButton(new GUIContent("Add New..."), FocusType.Keyboard))
{
    menu.ShowAsContext();
}
4 Likes
8

This is how it looks like with an Enum :

public void OnGUI()
{
    GenericMenu menu = new GenericMenu();
    var enumValues = Enum.GetValues(typeof(CellLayout));

    foreach (var value in enumValues)
    {
        Debug.Log(value);
        menu.AddItem(new GUIContent($"{value}"), false, handleItemClicked, value);
    }

    if (EditorGUILayout.DropdownButton(new GUIContent("Add New..."), FocusType.Keyboard))
    {
        menu.ShowAsContext();
    }

}

private void handleItemClicked(object userData)
{

}