tldraw/README.md
Steve Ruiz fa38c0ef0d
[improvement] examples (#264)
* Example project, fix bugs in readonly mode

* Adds ui options
2021-11-11 11:37:57 +00:00

16 KiB

@tldraw/tldraw

This package contains the tldraw editor as a React component named <TLDraw>. You can use this package to embed the editor in any React application.

🎨 Want to build your own tldraw-ish app instead? Try @tldraw/core.

💕 Love this library? Consider becoming a sponsor.

Installation

Use your package manager of choice to install @tldraw/tldraw and its peer dependencies.

yarn add @tldraw/tldraw
# or
npm i @tldraw/tldraw

Usage

Import the TLDraw React component and use it in your app.

import { TLDraw } from '@tldraw/tldraw'

function App() {
  return <TLDraw />
}

Persisting the State

You can use the id to persist the state in a user's browser storage.

import { TLDraw } from '@tldraw/tldraw'

function App() {
  return <TLDraw id="myState" />
}

Controlling the Component through Props

You can control the TLDraw component through its props.

import { TLDraw, TLDrawDocument } from '@tldraw/tldraw'

function App() {
  const myDocument: TLDrawDocument = {}

  return <TLDraw document={document} />
}

Controlling the Component through the TLDrawState API

You can also control the TLDraw component imperatively through the TLDrawState API.

import { TLDraw, TLDrawState } from '@tldraw/tldraw'

function App() {
  const handleMount = React.useCallback((state: TLDrawState) => {
    state.selectAll()
  }, [])

  return <TLDraw onMount={handleMount} />
}

Internally, the TLDraw component's user interface uses this API to make changes to the component's state. See the TLDrawState section for more on this API.

Responding to Changes

You can respond to changes and user actions using the onChange callback.

import { TLDraw, TLDrawState } from '@tldraw/tldraw'

function App() {
  const handleChange = React.useCallback((state: TLDrawState, reason: string) => {}, [])

  return <TLDraw onMount={handleMount} />
}

Internally, the TLDraw component's user interface uses this API to make changes to the component's state. See the TLDrawState section for more on this API.

Documentation

TLDraw

The TLDraw React component is the tldraw editor exported as a standalone component. You can control the editor through props, or through the TLDrawState's imperative API. All props are optional.

Prop Type Description
id string An id under which to persist the component's state.
document TLDrawDocument An initial TLDrawDocument object.
currentPageId string A current page id, referencing the TLDrawDocument object provided via the document prop.
autofocus boolean Whether the editor should immediately receive focus. Defaults to true.
showMenu boolean Whether to show the menu.
showPages boolean Whether to show the pages menu.
showStyles boolean Whether to show the styles menu.
showTools boolean Whether to show the tools.
showUI boolean Whether to show any UI other than the canvas.
onMount Function Called when the editor first mounts, receiving the current TLDrawState.
onPatch Function Called when the state is updated via a patch.
onCommand Function Called when the state is updated via a command.
onPersist Function Called when the state is persisted after an action.
onChange Function Called when the TLDrawState updates for any reason.
onUserChange Function Called when the user's "presence" information changes.
onUndo Function Called when the TLDrawState updates after an undo.
onRedo Function Called when the TLDrawState updates after a redo.
onSignIn Function Called when the user selects Sign In from the menu.
onSignOut Function Called when the user selects Sign Out from the menu.
onNewProject Function Called when the user when the user creates a new project through the menu or through a keyboard shortcut.
onSaveProject Function Called when the user saves a project through the menu or through a keyboard shortcut.
onSaveProjectAs Function Called when the user saves a project as a new project through the menu or through a keyboard shortcut.
onOpenProject Function Called when the user opens new project through the menu or through a keyboard shortcut.

Note

: For help with the file-related callbacks, see useFileSystem.

useFileSystem

You can use the useFileSystem hook to get prepared callbacks for onNewProject, onOpenProject, onSaveProject, and onSaveProjectAs. These callbacks allow a user to save files via the FileSystem API.

import { TLDraw, useFileSystem } from '@tldraw/tldraw'

function App() {
  const fileSystemEvents = useFileSystem()

  return <TLDraw {...fileSystemEvents} />
}

TLDrawDocument

You can initialize or control the <TLDraw> component via its document property. A TLDrawDocument is an object with three properties:

  • id - A unique ID for this document
  • pages - A table of TLDrawPage objects
  • pageStates - A table of TLPageState objects
  • version - The document's version, used internally for migrations.
import { TLDrawDocument, TLDrawState } from '@tldraw/tldraw'

const myDocument: TLDrawDocument = {
  id: 'doc',
  version: TLDrawState.version,
  pages: {
    page1: {
      id: 'page1',
      shapes: {},
      bindings: {},
    },
  },
  pageStates: {
    page1: {
      id: 'page1',
      selectedIds: [],
      currentParentId: 'page1',
      camera: {
        point: [0, 0],
        zoom: 1,
      },
    },
  },
}

function App() {
  return <TLDraw document={myDocument} />
}

Tip: TLDraw is built on @tldraw/core. The pages and pageStates in TLDraw are objects containing TLPage and TLPageState objects from the core library. For more about these types, check out the @tldraw/core documentation.

Important: In the pages object, each TLPage object must be keyed under its id property. Likewise, each TLPageState object must be keyed under its id. In addition, each TLPageState object must have an id that matches its corresponding page.

Shapes

Your TLPage objects may include shapes: objects that fit one of the TLDrawShape interfaces listed below. All TLDrawShapes extends a common interface:

Property Type Description
id string A unique ID for the shape.
name string The shape's name.
type string The shape's type.
parentId string The ID of the shape's parent (a shape or its page).
childIndex number The shape's order within its parent's children, indexed from 1.
point number[] The [x, y] position of the shape.
rotation number[] (optional) The shape's rotation in radians.
children string[] (optional) The shape's child shape ids.
handles TLDrawHandle{} (optional) A table of TLHandle objects.
isLocked boolean (optional) True if the shape is locked.
isHidden boolean (optional) True if the shape is hidden.
isEditing boolean (optional) True if the shape is currently editing.
isGenerated boolean (optional) True if the shape is generated.
isAspectRatioLocked boolean (optional) True if the shape's aspect ratio is locked.

Important: In order for re-ordering to work, a shape's childIndex values must start from 1, not 0. The page or parent shape's "bottom-most" child should have a childIndex of 1.

The ShapeStyle object is a common style API for all shapes.

Property Type Description
size SizeStyle The size of the shape's stroke.
dash DashStyle The style of the shape's stroke.
color ColorStyle The shape's color.
isFilled boolean (optional) True if the shape is filled.

DrawShape

A hand-drawn line.

Property Type Description
points number[][] An array of points as [x, y, pressure].
RectangleShape

A rectangular shape.

Property Type Description
size number[] The [width, height] of the rectangle.

EllipseShape

An elliptical shape.

Property Type Description
radius number[] The [x, y] radius of the ellipse.

ArrowShape

An arrow that can connect shapes.

Property Type Description
handles object An object with three TLHandle properties: start, end, and bend.
decorations object An object with two properties start, end, and bend.

TextShape

A line of text.

Property Type Description
text string The shape's text content.

StickyShape

A sticky note.

Property Type Description
text string The shape's text content.

Bindings

A binding is a connection from one shape and to another shape. At the moment, only arrows may be bound "from". Most shapes may be bound "to", except other ArrowShape and DrawShapes.

Property Type Description
id string The binding's own unique ID.
fromId string The id of the ArrowShape that the binding is bound to.
toId string The id of the other shape that the binding is bound to.
handleId start or end The connected arrow handle.
distance number The distance from the bound point.
point number[] A normalized point representing the bound point.

TLDrawState API

You can change the TLDraw component's state through an imperative API called TLDrawState. To access this API, use the onMount callback, or any of the component's callback props, like onPersist.

import { TLDraw, TLDrawState } from '@tldraw/tldraw'

function App() {
  const handleMount = React.useCallback((state: TLDrawState) => {
    state.selectAll()
  }, [])

  return <TLDraw onMount={handleMount} />
}

To view the full documentation of the TLDrawState API, generate the project's documentation by running yarn docs from the root folder, then open the file at:

/packages/tldraw/docs/classes/TLDrawState.html

Here are some useful methods:

  • loadDocument
  • select
  • selectAll
  • selectNone
  • delete
  • deleteAll
  • deletePage
  • changePage
  • cut
  • copy
  • paste
  • copyJson
  • copySvg
  • undo
  • redo
  • zoomIn
  • zoomOut
  • zoomToContent
  • zoomToSelection
  • zoomToFit
  • zoomTo
  • resetZoom
  • setCamera
  • resetCamera
  • align
  • distribute
  • stretch
  • nudge
  • duplicate
  • flipHorizontal
  • flipVertical
  • rotate
  • style
  • group
  • ungroup
  • createShapes
  • updateShapes
  • updateDocument
  • updateUsers
  • removeUser
  • setSetting
  • selectTool
  • cancel

Check the generated docs, source or the TypeScript types for more on these and other methods.

Local Development

From the root folder:

  • Run yarn to install dependencies.

  • Run yarn start to start the development server for the package and for the example.

  • Open localhost:5420 to view the example project.

Note: The multiplayer examples and endpoints currently require an API key from Liveblocks, however the storage services that are used in TLDraw are currently in alpha and (as of November 2021) not accessible to the general public. You won't be able to authenticate and run these parts of the project.

Other scripts:

  • Run yarn test to execute unit tests via Jest.

  • Run yarn docs to build the docs via ts-doc.

Example

See the example folder for examples of how to use the <TLDraw/> component.

Community

Support

Need help? Please open an issue for support.

Discussion

Want to connect with other devs? Visit the Discord channel.

License

This project is licensed under MIT.

If you're using the library in a commercial product, please consider becoming a sponsor.

Author