import scrawl from '../source/scrawl.js'import scrawl from '../source/scrawl.js'let canvas = scrawl.library.canvas.mycanvas;
canvas.set({
backgroundColor: 'aliceblue',
css: {
border: '1px solid black'
}
});Import image from DOM
scrawl.importDomImage('.flowers');Define some filters to play with
scrawl.makeFilter({
name: 'grayscale',
method: 'grayscale',
}).clone({
name: 'sepia',
method: 'sepia',
}).clone({
name: 'cyan',
method: 'cyan',
}).clone({
name: 'pixelate',
method: 'pixelate',
tileWidth: 8,
tileHeight: 8,
});Define the artefacts that will be used as pivots and paths before the artefacts that use them as such
scrawl.makeWheel({
name: 'pin-1',
order: 2,
startX: 100,
startY: 100,
handleX: 'center',
handleY: 'center',
radius: 10,
fillStyle: 'blue',
strokeStyle: 'darkgray',
lineWidth: 2,
method: 'fillAndDraw',
}).clone({
name: 'pin-2',
startY: 300,
}).clone({
name: 'pin-3',
startY: 500,
}).clone({
name: 'pin-4',
fillStyle: 'green',
startX: 500,
startY: 100,
}).clone({
name: 'pin-5',
startY: 230,
}).clone({
name: 'pin-6',
startY: 370,
}).clone({
name: 'pin-7',
startY: 500,
});Create a Group to hold the draggable artefacts, for easier user action collision detection
let pins = scrawl.makeGroup({
name: 'my-pins',
host: canvas.base.name,
}).addArtefacts('pin-1', 'pin-2', 'pin-3', 'pin-4', 'pin-5', 'pin-6', 'pin-7');Create the Shape entitys the Loom will use as its tracks - fromPath, toPath
scrawl.makeQuadratic({
name: 'my-quad',
pivot: 'pin-1',
lockTo: 'pivot',
useStartAsControlPoint: true,
precision: 0.05,
controlPivot: 'pin-2',
controlLockTo: 'pivot',
endPivot: 'pin-3',
endLockTo: 'pivot',
method: 'none',
minimumBoundingBoxDimensions: 0,
useAsPath: true,
});
let myBez = scrawl.makeBezier({
name: 'my-bezier',
pivot: 'pin-4',
lockTo: 'pivot',
useStartAsControlPoint: true,
precision: 0.05,
startControlPivot: 'pin-5',
startControlLockTo: 'pivot',
endControlPivot: 'pin-6',
endControlLockTo: 'pivot',
endPivot: 'pin-7',
endLockTo: 'pivot',
method: 'none',
minimumBoundingBoxDimensions: 0,
useAsPath: true,
});Every Loom needs a source image
let piccy = scrawl.makePicture({
name: 'myFlower',
asset: 'iris',
copyStartX: 0,
copyStartY: 0,
copyWidth: '100%',
copyHeight: '100%',
visibility: false,
});The Loom entity definition
let myLoom = scrawl.makeLoom({
name: 'display-loom',Check to see that paths can be loaded either as picture name strings, or as the entity itself
fromPath: 'my-quad',
toPath: myBez,
source: 'myFlower',
lineWidth: 2,
lineCap: 'round',
strokeStyle: 'orange',
boundingBoxColor: 'red',
showBoundingBox: true,
method: 'fillThenDraw',
onEnter: function () { this.set({ lineWidth: 6 }) },
onLeave: function () { this.set({ lineWidth: 2 }) },
});Mouse movement over and away from the Loom (emulates CSS element hover functionality)
let interactions = function () { canvas.cascadeEventAction('move') };
scrawl.addListener('move', interactions, canvas.domElement);Create the drag-and-drop zone
scrawl.makeDragZone({
zone: canvas,
collisionGroup: pins,
endOn: ['up', 'leave'],
exposeCurrentArtefact: true,
});console.log(myLoom.saveAsPacket());RESULT:
[
"display-loom",
"Loom",
"entity",
{
"name":"display-loom",
"showBoundingBox":true,
"boundingBoxColor":"red",
"method":"fillThenDraw",
"onEnter":"~~~ this.set({ lineWidth: 6 }) ",
"onLeave":"~~~ this.set({ lineWidth: 2 }) ",
"onDown":"~~~",
"onUp":"~~~",
"delta":{},
"fromPath":"my-quad",
"toPath":"my-bezier",
"source":"myFlower",
"group":"mycanvas_base",
"strokeStyle":"orange",
"lineWidth":2,
"lineCap":"round"
}
]Function to display frames-per-second data, and other information relevant to the demo
let report = function () {
let testTicker = Date.now(),
testTime, testNow,
testMessage = document.querySelector('#reportmessage');
return function () {
testNow = Date.now();
testTime = testNow - testTicker;
testTicker = testNow;
testMessage.textContent = `Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}`;
};
}();Create the Display cycle animation
scrawl.makeRender({
name: 'demo-animation',
target: canvas,
afterShow: report,
});scrawl.observeAndUpdate({
event: ['input', 'change'],
origin: '.controlItem',
target: myLoom,
useNativeListener: true,
preventDefault: true,
updates: {
fromStart: ['fromPathStart', 'float'],
fromEnd: ['fromPathEnd', 'float'],
toStart: ['toPathStart', 'float'],
toEnd: ['toPathEnd', 'float'],
sync: ['synchronizePathCursors', 'boolean'],
looping: ['loopPathCursors', 'boolean'],
rendering: ['isHorizontalCopy', 'boolean'],
method: ['method', 'raw'],
},
});Delta animation controls handler
let updateAnimation = (e) => {
e.preventDefault();
e.returnValue = false;
let val = e.target.value;
switch (val) {
case 'off' :
myLoom.set({ delta: {
fromPathStart: 0,
fromPathEnd: 0,
toPathStart: 0,
toPathEnd: 0,
}});
break;
case 'posDelta' :
myLoom.set({ delta: {
fromPathStart: 0.002,
fromPathEnd: 0.002,
toPathStart: 0.002,
toPathEnd: 0.002,
}});
break;
case 'negDelta' :
myLoom.set({ delta: {
fromPathStart: -0.002,
fromPathEnd: -0.002,
toPathStart: -0.002,
toPathEnd: -0.002,
}});
break;
}
};
scrawl.addNativeListener(['input', 'change'], updateAnimation, '#animation');Picture entity filters
let updateFilter = (e) => {
e.preventDefault();
e.returnValue = false;
let val = e.target.value;
piccy.clearFilters();
if (val) piccy.addFilters(val);
};
scrawl.addNativeListener(['input', 'change'], updateFilter, '#filter');Picture entity copy start and copy dimensions
scrawl.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'],
},
});Setup form
document.querySelector('#fromStart').value = 0;
document.querySelector('#fromEnd').value = 1;
document.querySelector('#toStart').value = 0;
document.querySelector('#toEnd').value = 1;
document.querySelector('#sync').options.selectedIndex = 1;
document.querySelector('#looping').options.selectedIndex = 1;
document.querySelector('#rendering').options.selectedIndex = 0;
document.querySelector('#animation').options.selectedIndex = 0;
document.querySelector('#filter').options.selectedIndex = 0;
document.querySelector('#method').options.selectedIndex = 4;
document.querySelector('#copy_start_xPercent').value = 0;
document.querySelector('#copy_start_yPercent').value = 0;
document.querySelector('#copy_dims_widthPercent').value = 100;
document.querySelector('#copy_dims_widthAbsolute').value = 400;
document.querySelector('#copy_start_xAbsolute').value = 0;
document.querySelector('#copy_start_yAbsolute').value = 0;
document.querySelector('#copy_dims_heightPercent').value = 100;
document.querySelector('#copy_dims_heightAbsolute').value = 400;console.log(scrawl.library);