Version: 2023.2
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ToolAttribute.variantGroup

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public Type variantGroup;

Description

Tool variants are used to group logically similar tools into a single button in the Tools Overlay.

The variantGroup type acts a key to specify groups of tools that should be considered a group in the UI.

using System;
using UnityEditor;
using UnityEditor.EditorTools;
using UnityEngine;

namespace GlobalToolVariants
{
    // Define 3 tools that should be shown as a single button in the Tools Overlay.
    struct ShapeVariantGroup {}

    [EditorTool("Line (Custom Global)", variantGroup = typeof(ShapeVariantGroup), variantPriority = 2)]
    [Icon("Assets/Examples/Icons/Variant-Line.png")]
    class Line : EditorTool {}

    [EditorTool("Circle (Custom Global)", variantGroup = typeof(ShapeVariantGroup), variantPriority = 1)]
    [Icon("Assets/Examples/Icons/Variant-Circle.png")]
    class Circle : EditorTool {}

    [EditorTool("Square (Custom Global)", variantGroup = typeof(ShapeVariantGroup), variantPriority = 0)]
    [Icon("Assets/Examples/Icons/Variant-Square.png")]
    class Square : EditorTool {}
}