FittedBlock¶

Overview¶

A Block that needs to be fitted to either the screen bounds or other local bounds. This potentially reduces memory usage and can make graphical operations in the browser faster, yet if the fit is rapidly changing could cause performance degradation.

@author Jonathan Olson <jonathan.olson@colorado.edu>

Class FittedBlock¶

import { FittedBlock } from 'scenerystack/scenery';

Instance Methods¶

initialize( display, renderer, transformRootInstance, preferredFit )¶

@public

@param {Display} display @param {number} renderer @param {Instance} transformRootInstance - All transforms of this instance and its ancestors will already have been applied. This block will only be responsible for applying transforms of this instance's descendants. @param {FittedBlock.Fit} preferredFit @returns {FittedBlock} - For chaining

setFit( fit )¶

Changes the current fit, if it's currently different from the argument. @private

@param {FittedBlock.Fit} fit

markDirtyFit()¶

@public

updateFit()¶

Should be called from update() whenever this block is dirty @protected

setSizeFullDisplay()¶

@public

setSizeFitBounds()¶

@public

addCommonFitInstance( instance )¶

@public

@param {Instance|null} instance

removeCommonFitInstance()¶

@public

dispose()¶

Releases references @public @override

addDrawable( drawable )¶

Track the fittability of the added drawable. @public @override

@param {Drawable} drawable

removeDrawable( drawable )¶

Stop tracking the fittability of the removed drawable. @public @override

@param {Drawable} drawable

onFittabilityChange( fittable )¶

Called from the fittability listener attached to child drawables when their fittability changes. @private

@param {boolean} fittable - Whether the particular child drawable is fittable

incrementUnfittable()¶

The number of unfittable child drawables was increased by 1. @private

decrementUnfittable()¶

The number of unfittable child drawables was decreased by 1. @private

checkFitConstraints()¶

Check to make sure we are using the correct current fit. @private

computeCommonAncestorInstance()¶

@private

@returns {Instance}

onIntervalChange( firstDrawable, lastDrawable )¶

@public @override

@param {Drawable} firstDrawable @param {Drawable} lastDrawable

Source Code¶

See the source for FittedBlock.js in the scenery repository.