threepipe/website/plugin/UndoManagerPlugin.md

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UndoManagerPlugin

Example — Source Code — API Reference

UndoManagerPlugin adds support for undo/redo operations in the viewer. It can be used to manage the history of changes made to the scene, objects, materials, etc.

It uses the JSUndoManager(from ts-browser-helpers) to maintain a common undo/redo history across the viewer and other plugins.

The plugin is used automatically by TweakpaneUiPlugin, BlueprintJsUiPlugin, PickingPlugin, TransformControlsPlugin, and other plugins that support undo/redo operations. It is not required to be added to the viewer explicitly when using any of the UI plugins, but can be added if you want to use it directly.

viewer.addPlugin(UndoManagerPlugin)

let undoManager: JSUndoManager | undefined
// listen for plugin to be added/removed/changed
viewer.forPlugin<UndoManagerPlugin>('UndoManagerPlugin', (um)=> {
    undoManager = um.undoManager
}, ()=> undoManager = undefined)

// on button click
undoManager.record({
    // my command
})