scrawl-canvas
Version:
Version 8.9.4 - 19 Nov 2022
227 lines (177 loc) • 6.15 kB
JavaScript
// # Demo Canvas 016
// Phrase entity position and font attributes; Block mimic functionality
// [Run code](../../demo/canvas-016.html)
import {
library as L,
makeBlock,
makePhrase,
makeRender,
makeWheel,
observeAndUpdate,
} from '../source/scrawl.js'
import { reportSpeed } from './utilities.js';
// #### Scene setup
let canvas = L.artefact.mycanvas;
// Create Phrase entity
let lorem = makePhrase({
name: 'myPhrase',
order: 1,
startX: 300,
startY: 200,
handleX: '50%',
handleY: '50%',
width: '50%',
text: 'Lorem ipsum har varit standard ända sedan 1500-talet, när-en-okänd-boksättare-tog att antal bokstäver och blandade dem för att göra ett provexemplar av en bok.',
font: "16px 'Open Sans', 'Fira Sans', 'Lucida Sans', 'Lucida Sans Unicode', 'Trebuchet MS', 'Liberation Sans', 'Nimbus Sans L', sans-serif",
fillStyle: 'darkgreen',
method: 'fill',
showBoundingBox: true,
// Use the `exposeText` attribute to expose the entity's text to the DOM, to make it accessible to people not able to view the canvas (for whatever reason)
// + This flag is `true` by default
exposeText: true,
});
// Add a background entity which will mimic the Phrase entity
makeBlock({
name: 'writing-paper',
order: 0,
width: 20,
height: 20,
handleX: 10,
handleY: 10,
fillStyle: 'rgb(240, 245, 255)',
method: 'fillAndDraw',
mimic: 'myPhrase',
lockTo: 'mimic',
useMimicDimensions: true,
useMimicScale: true,
useMimicStart: true,
useMimicHandle: true,
useMimicOffset: true,
useMimicRotation: true,
useMimicFlip: true,
addOwnDimensionsToMimic: true,
addOwnScaleToMimic: false,
addOwnStartToMimic: false,
addOwnHandleToMimic: true,
addOwnOffsetToMimic: false,
addOwnRotationToMimic: false,
});
// Add a pivot wheel
makeWheel({
fillStyle: 'red',
radius: 5,
pivot: 'myPhrase',
lockTo: 'pivot',
handleX: 'center',
handleY: 'center',
order: 2,
});
// #### Scene animation
// Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
let [startX, startY] = lorem.start;
let [handleX, handleY] = lorem.handle;
let [width, height] = lorem.dimensions;
let {roll, scale} = lorem;
let fontSize = lorem.get('size'),
fontString = lorem.get('font');
return ` Start - x: ${startX}, y: ${startY}
Handle - x: ${handleX}, y: ${handleY}
Width: ${width}; Roll: ${roll}; Scale: ${scale}
Font size: ${fontSize}
Font string: ${fontString}`;
});
// Create the Display cycle animation
makeRender({
name: 'demo-animation',
target: canvas,
afterShow: report,
});
// #### User interaction
// Setup form observer functionality
//
// KNOWN ISSUE: in the mix between updating scale, font size and font family, the height calculation occasionally glitches, giving an incorrect height value for the Phrase entity
observeAndUpdate({
event: ['input', 'change'],
origin: '.controlItem',
target: lorem,
useNativeListener: true,
preventDefault: true,
updates: {
relativeWidth: ['width', '%'],
absoluteWidth: ['width', 'round'],
start_xPercent: ['startX', '%'],
start_xAbsolute: ['startX', 'round'],
start_xString: ['startX', 'raw'],
start_yPercent: ['startY', '%'],
start_yAbsolute: ['startY', 'round'],
start_yString: ['startY', 'raw'],
handle_xPercent: ['handleX', '%'],
handle_xAbsolute: ['handleX', 'round'],
handle_xString: ['handleX', 'raw'],
handle_yPercent: ['handleY', '%'],
handle_yAbsolute: ['handleY', 'round'],
handle_yString: ['handleY', 'raw'],
roll: ['roll', 'float'],
scale: ['scale', 'float'],
upend: ['flipUpend', 'boolean'],
reverse: ['flipReverse', 'boolean'],
weight: ['weight', 'raw'],
style: ['style', 'raw'],
variant: ['variant', 'raw'],
family: ['family', 'raw'],
size_string: ['size', 'raw'],
size_px: ['size', 'px'],
},
});
// Setup form
// @ts-expect-error
document.querySelector('#start_xPercent').value = 50;
// @ts-expect-error
document.querySelector('#start_yPercent').value = 50;
// @ts-expect-error
document.querySelector('#handle_xPercent').value = 50;
// @ts-expect-error
document.querySelector('#handle_yPercent').value = 50;
// @ts-expect-error
document.querySelector('#start_xAbsolute').value = 300;
// @ts-expect-error
document.querySelector('#start_yAbsolute').value = 200;
// @ts-expect-error
document.querySelector('#handle_xAbsolute').value = 100;
// @ts-expect-error
document.querySelector('#handle_yAbsolute').value = 100;
// @ts-expect-error
document.querySelector('#start_xString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#start_yString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#handle_xString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#handle_yString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#roll').value = 0;
// @ts-expect-error
document.querySelector('#scale').value = 1;
// @ts-expect-error
document.querySelector('#upend').options.selectedIndex = 0;
// @ts-expect-error
document.querySelector('#reverse').options.selectedIndex = 0;
// @ts-expect-error
document.querySelector('#relativeWidth').value = 50;
// @ts-expect-error
document.querySelector('#absoluteWidth').value = 300;
// @ts-expect-error
document.querySelector('#weight').options.selectedIndex = 0;
// @ts-expect-error
document.querySelector('#style').options.selectedIndex = 0;
// @ts-expect-error
document.querySelector('#variant').options.selectedIndex = 0;
// @ts-expect-error
document.querySelector('#family').options.selectedIndex = 0;
// @ts-expect-error
document.querySelector('#size_px').value = 16;
// @ts-expect-error
document.querySelector('#size_string').options.selectedIndex = 0;
// #### Development and testing
console.log(L)