Support for long for EditorGUILayout.MaskField

Unity Engine
,
1

It would be useful to support long for EditorGUILayout.MaskField. Having to narrow down to 32 bits feels really restrictive. 64 would be great help.

2

Please this is still very much needed for my workflow.

3

Why not just write your own property drawer for this?

4

Honestly the number of custom inspectors I have to rely on and maintain is unreal. If Unity could get this one right at least it would be a blessing. Beside I don’t even know how I would get started. Seems like every option menu (allowing multiple selected), only supports integers.

5

Iunno, start with the C# ref? UnityCsReference/Editor/Mono/Inspector/MaskFieldDropdown.cs at master · Unity-Technologies/UnityCsReference · GitHub

6

I suspect that this is the way it is for one or more technical reasons which would be “getting it right”, but I wouldn’t be surprised if it were technical debt which would be annoying but equally unchangeable. I checked UI Elements which is intended to replace IMGUI for creating editors and it still uses 32-bits.

https://docs.unity3d.com/Packages/com.unity.ui@1.0/api/UnityEditor.UIElements.MaskField.html

7

I started building this but I can’t get it to work. Maybe someone else can, and share it. Let’s help each other out!

    public static class ExtendedEditorGUI
    {
        public static long LongMaskField(Rect position, string label,long mask, string[] displayedOptions)
        {
            float width = 100;
            EditorGUI.LabelField(new Rect(position.x, position.y, width, position.height), label);
            position = new Rect(width + 10, position.y, position.width - width - 10, position.height);

            if (EditorGUI.DropdownButton(position, new GUIContent(GetMaskString(mask, displayedOptions)), FocusType.Keyboard))
            {
                GenericMenu menu = new GenericMenu();

                bool nothing = false;
                if (mask == 0) { nothing = true; }
                menu.AddItem(new GUIContent("Nothing"), nothing, () =>
                {
                    mask = 0;

                });

                bool all = false;
                if (mask == -1) { all = true; }
                menu.AddItem(new GUIContent("Everything"), all, () =>
                {
                    mask = -1;

                });

                for (int i = 0; i < displayedOptions.Length; i++)
                {
                    int index = i; // Capture the index for the closure
                    bool isSet = (mask & (1L << i)) != 0;
                    menu.AddItem(new GUIContent(displayedOptions[i]), isSet, () =>
                    {
                        mask = ToggleMask(mask, index);

                    });
                }
                menu.DropDown(position);

            }

            return mask;
        }

        private static long ToggleMask(long mask, int index)
        {
            if ((mask & (1L << index)) != 0)
            {
                mask &= ~(1L << index);
            }
            else
            {
                mask |= (1L << index);
            }
            return mask;
        }

        private static string GetMaskString(long mask, string[] displayedOptions)
        {
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            if (mask == -1) { sb.Append("Everything"); return sb.ToString(); }
            for (int i = 0; i < displayedOptions.Length; i++)
            {
                if ((mask & (1L << i)) != 0)
                {
                    if (sb.Length > 0)
                    {
                        sb.Append(", ");
                    }
                    sb.Append(displayedOptions[i]);
                }
            }
            return sb.Length > 0 ? sb.ToString() : "Nothing";
        }
    }

So for some reason the mask value is not returning to the LongMaskField method when clicking the menu item. (line 17, 25 and 36) Apart from that, I believe this is the right approach.

From a custom editor or property drawer, you should call:

bitmask = ExtendedEditorGUI.LongMaskField(position,"mask",bitmask,options);