scrawl-canvas
Version:
Version 8.9.4 - 19 Nov 2022
220 lines (170 loc) • 6.2 kB
JavaScript
// # Demo Canvas 008
// Picture entity position; manipulate copy attributes
// [Run code](../../demo/canvas-008.html)
import {
importDomImage,
library as L,
makePicture,
makeRender,
observeAndUpdate,
} from '../source/scrawl.js'
import { reportSpeed } from './utilities.js';
// #### Scene setup
let canvas = L.artefact.mycanvas;
// Import image from DOM, and create Picture entity using it
importDomImage('.flowers');
let piccy = makePicture({
name: 'myFlower',
asset: 'iris',
width: 200,
height: 200,
startX: 300,
startY: 200,
handleX: 100,
handleY: 100,
copyWidth: 200,
copyHeight: 200,
copyStartX: 100,
copyStartY: 100,
lineWidth: 10,
strokeStyle: 'gold',
order: 1,
method: 'drawAndFill',
});
// Create a second Picture entity, this time pulling in the image dynamically
piccy.clone({
name: 'myFactory',
imageSource: 'img/canalFactory-800.png',
width: 600,
height: 400,
startX: 0,
startY: 0,
handleX: 0,
handleY: 0,
copyWidth: 600,
copyHeight: 400,
copyStartX: 150,
copyStartY: 0,
order: 0,
method: 'fill',
});
// #### Scene animation
// Function to display frames-per-second data, and other information relevant to the demo
const report = reportSpeed('#reportmessage', function () {
// Getting values using this approach allows us to see the raw, unprocessed values held by the entity.
// + Use piccy.get('attributeName') to obtain the processed values being used by the entity
const [copyW, copyH] = piccy.copyDimensions;
const [copyX, copyY] = piccy.copyStart;
const [pasteX, pasteY] = piccy.start;
const [pasteW, pasteH] = piccy.dimensions;
const [handleX, handleY] = piccy.handle;
const {roll, scale} = piccy;
return ` Copy - x: ${copyX}, y: ${copyY}, w: ${copyW}, h: ${copyH}
Paste - x: ${pasteX}, y: ${pasteY}, w: ${pasteW}, h:${pasteH}
Handle - x: ${handleX}, y: ${handleY}
Roll: ${roll}; Scale: ${scale}`;
});
// Create the Display cycle animation
makeRender({
name: 'demo-animation',
target: canvas,
afterShow: report,
});
// #### User interaction
// Setup form observer functionality
observeAndUpdate({
event: ['input', 'change'],
origin: '.controlItem',
target: piccy,
useNativeListener: true,
preventDefault: true,
updates: {
copy_start_xPercent: ['copyStartX', '%'],
copy_start_xAbsolute: ['copyStartX', 'round'],
copy_start_yPercent: ['copyStartY', '%'],
copy_start_yAbsolute: ['copyStartY', 'round'],
copy_dims_widthPercent: ['copyWidth', '%'],
copy_dims_widthAbsolute: ['copyWidth', 'round'],
copy_dims_heightPercent: ['copyHeight', '%'],
copy_dims_heightAbsolute: ['copyHeight', 'round'],
paste_dims_widthPercent: ['width', '%'],
paste_dims_widthAbsolute: ['width', 'round'],
paste_dims_heightPercent: ['height', '%'],
paste_dims_heightAbsolute: ['height', 'round'],
paste_start_xPercent: ['startX', '%'],
paste_start_xAbsolute: ['startX', 'round'],
paste_start_xString: ['startX', 'raw'],
paste_start_yPercent: ['startY', '%'],
paste_start_yAbsolute: ['startY', 'round'],
paste_start_yString: ['startY', 'raw'],
paste_handle_xPercent: ['handleX', '%'],
paste_handle_xAbsolute: ['handleX', 'round'],
paste_handle_xString: ['handleX', 'raw'],
paste_handle_yPercent: ['handleY', '%'],
paste_handle_yAbsolute: ['handleY', 'round'],
paste_handle_yString: ['handleY', 'raw'],
roll: ['roll', 'float'],
scale: ['scale', 'float'],
upend: ['flipUpend', 'boolean'],
reverse: ['flipReverse', 'boolean'],
},
});
// Setup form
// @ts-expect-error
document.querySelector('#copy_start_xPercent').value = 25;
// @ts-expect-error
document.querySelector('#copy_start_yPercent').value = 25;
// @ts-expect-error
document.querySelector('#copy_dims_widthPercent').value = 50;
// @ts-expect-error
document.querySelector('#copy_dims_widthAbsolute').value = 200;
// @ts-expect-error
document.querySelector('#copy_start_xAbsolute').value = 100;
// @ts-expect-error
document.querySelector('#copy_start_yAbsolute').value = 100;
// @ts-expect-error
document.querySelector('#copy_dims_heightPercent').value = 50;
// @ts-expect-error
document.querySelector('#copy_dims_heightAbsolute').value = 200;
// @ts-expect-error
document.querySelector('#paste_dims_widthPercent').value = 33;
// @ts-expect-error
document.querySelector('#paste_dims_widthAbsolute').value = 200;
// @ts-expect-error
document.querySelector('#paste_dims_heightPercent').value = 50;
// @ts-expect-error
document.querySelector('#paste_dims_heightAbsolute').value = 200;
// @ts-expect-error
document.querySelector('#paste_start_xPercent').value = 50;
// @ts-expect-error
document.querySelector('#paste_start_yPercent').value = 50;
// @ts-expect-error
document.querySelector('#paste_handle_xPercent').value = 50;
// @ts-expect-error
document.querySelector('#paste_handle_yPercent').value = 50;
// @ts-expect-error
document.querySelector('#paste_start_xAbsolute').value = 300;
// @ts-expect-error
document.querySelector('#paste_start_yAbsolute').value = 200;
// @ts-expect-error
document.querySelector('#paste_handle_xAbsolute').value = 100;
// @ts-expect-error
document.querySelector('#paste_handle_yAbsolute').value = 100;
// @ts-expect-error
document.querySelector('#paste_start_xString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#paste_start_yString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#paste_handle_xString').options.selectedIndex = 1;
// @ts-expect-error
document.querySelector('#paste_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;
// #### Development and testing
console.log(L);