This PR implements a camera options API.
- [x] Initial PR
- [x] Updated unit tests
- [x] Feedback / review
- [x] New unit tests
- [x] Update use-case examples
- [x] Ship?
## Public API
A user can provide camera options to the `Tldraw` component via the
`cameraOptions` prop. The prop is also available on the `TldrawEditor`
component and the constructor parameters of the `Editor` class.
```tsx
export default function CameraOptionsExample() {
return (
<div className="tldraw__editor">
<Tldraw cameraOptions={CAMERA_OPTIONS} />
</div>
)
}
```
At runtime, a user can:
- get the current camera options with `Editor.getCameraOptions`
- update the camera options with `Editor.setCameraOptions`
Setting the camera options automatically applies them to the current
camera.
```ts
editor.setCameraOptions({...editor.getCameraOptions(), isLocked: true })
```
A user can get the "camera fit zoom" via `editor.getCameraFitZoom()`.
# Interface
The camera options themselves can look a few different ways depending on
the `type` provided.
```tsx
export type TLCameraOptions = {
/** Whether the camera is locked. */
isLocked: boolean
/** The speed of a scroll wheel / trackpad pan. Default is 1. */
panSpeed: number
/** The speed of a scroll wheel / trackpad zoom. Default is 1. */
zoomSpeed: number
/** The steps that a user can zoom between with zoom in / zoom out. The first and last value will determine the min and max zoom. */
zoomSteps: number[]
/** Controls whether the wheel pans or zooms.
*
* - `zoom`: The wheel will zoom in and out.
* - `pan`: The wheel will pan the camera.
* - `none`: The wheel will do nothing.
*/
wheelBehavior: 'zoom' | 'pan' | 'none'
/** The camera constraints. */
constraints?: {
/** The bounds (in page space) of the constrained space */
bounds: BoxModel
/** The padding inside of the viewport (in screen space) */
padding: VecLike
/** The origin for placement. Used to position the bounds within the viewport when an axis is fixed or contained and zoom is below the axis fit. */
origin: VecLike
/** The camera's initial zoom, used also when the camera is reset.
*
* - `default`: Sets the initial zoom to 100%.
* - `fit-x`: The x axis will completely fill the viewport bounds.
* - `fit-y`: The y axis will completely fill the viewport bounds.
* - `fit-min`: The smaller axis will completely fill the viewport bounds.
* - `fit-max`: The larger axis will completely fill the viewport bounds.
* - `fit-x-100`: The x axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
* - `fit-y-100`: The y axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
* - `fit-min-100`: The smaller axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
* - `fit-max-100`: The larger axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
*/
initialZoom:
| 'fit-min'
| 'fit-max'
| 'fit-x'
| 'fit-y'
| 'fit-min-100'
| 'fit-max-100'
| 'fit-x-100'
| 'fit-y-100'
| 'default'
/** The camera's base for its zoom steps.
*
* - `default`: Sets the initial zoom to 100%.
* - `fit-x`: The x axis will completely fill the viewport bounds.
* - `fit-y`: The y axis will completely fill the viewport bounds.
* - `fit-min`: The smaller axis will completely fill the viewport bounds.
* - `fit-max`: The larger axis will completely fill the viewport bounds.
* - `fit-x-100`: The x axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
* - `fit-y-100`: The y axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
* - `fit-min-100`: The smaller axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
* - `fit-max-100`: The larger axis will completely fill the viewport bounds, or 100% zoom, whichever is smaller.
*/
baseZoom:
| 'fit-min'
| 'fit-max'
| 'fit-x'
| 'fit-y'
| 'fit-min-100'
| 'fit-max-100'
| 'fit-x-100'
| 'fit-y-100'
| 'default'
/** The behavior for the constraints for both axes or each axis individually.
*
* - `free`: The bounds are ignored when moving the camera.
* - 'fixed': The bounds will be positioned within the viewport based on the origin
* - `contain`: The 'fixed' behavior will be used when the zoom is below the zoom level at which the bounds would fill the viewport; and when above this zoom, the bounds will use the 'inside' behavior.
* - `inside`: The bounds will stay completely within the viewport.
* - `outside`: The bounds will stay touching the viewport.
*/
behavior:
| 'free'
| 'fixed'
| 'inside'
| 'outside'
| 'contain'
| {
x: 'free' | 'fixed' | 'inside' | 'outside' | 'contain'
y: 'free' | 'fixed' | 'inside' | 'outside' | 'contain'
}
}
}
```
### Change Type
- [x] `sdk` — Changes the tldraw SDK
- [x] `feature` — New feature
### Test Plan
These features combine in different ways, so we'll want to write some
more tests to find surprises.
1. Add a step-by-step description of how to test your PR here.
2.
- [ ] Unit Tests
### Release Notes
- SDK: Adds camera options.
---------
Co-authored-by: Mitja Bezenšek <mitja.bezensek@gmail.com>
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