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graphics.js
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graphics.js
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class GraphicElems { // an abstract class
constructor() {
if (this.constructor === GraphicElems) {
throw new TypeError('Abstract class "GrapicElems" cannot be instantiated directly.');
}
this.object = null;
}
draw(canvas) {
canvas.add(this.object);
}
getX() {
return this.object.left;
}
getY() {
return this.object.top;
}
rotate(angle) {
this.object.rotate(angle);
}
setAngle(angle) {
this.object.angle = angle;
}
}
class Circle extends GraphicElems {
constructor(x = 0, y = 0, radius = 50, color = 'red') {
super();
var circle = new fabric.Circle({
radius: radius,
left: x,
top: y,
originX: 'center',
originY: 'center',
fill: color,
});
this.object = circle;
this.left = x;
this.top = y;
this.originX = 'center';
this.originY = 'center';
this.radius = radius;
this.color = color;
}
}
class Group extends GraphicElems {
constructor(shapeArray, left = 0, top = 0) {
super();
var group = new fabric.Group(shapeArray, {
left: left,
top: top,
originX: 'center',
originY: 'center',
});
this.object = group;
this.left = left;
this.top = top;
}
add(shape) {
shape.set('left', this.left + shape.left)
shape.set('top', this.top + shape.top)
this.object.addWithUpdate(shape)
}
}
class Image extends GraphicElems {
constructor(url, x, y, height, width) {
super();
fabric.Image.fromURL(url, function(image) {
var img = image.set({
left: x,
top: y,
width: width,
height: height
});
canvas.add(image);
});
}
}
class Rectangle extends GraphicElems {
constructor(x = 0, y = 0, height = 50, width = 50, color = 'blue') {
super();
var rectangle = new fabric.Rect({
left: x,
top: y,
height: height,
width: width,
originX: 'originX',
originY: 'originY',
fill: color,
});
this.object = rectangle;
this.left = x;
this.top = y;
this.height = height;
this.width = width;
this.color = color;
}
}
class Text extends GraphicElems {
constructor(text, x = 0, y = 0, color = 'black', fontSize = 30) {
super();
var textElem = new fabric.Text(text, {
fontSize: fontSize,
left: x,
top: y,
originX: 'originX',
originY: 'originY',
fill: color
});
this.object = textElem;
this.left = x;
this.top = y;
this.color = color;
this.fontSize = fontSize;
}
}
class Triangle extends GraphicElems {
constructor(x = 0, y = 0, width = 50, height = 50, color = 'yellow') {
super();
var triangle = new fabric.Triangle({
left: x,
top: y,
height: height,
width: width,
originX: 'originX',
originY: 'originY',
fill: color,
});
this.object = triangle;
this.left = x;
this.top = y;
this.width = width;
this.height = height;
this.color = color;
}
}
// Derived Classes
class Arc extends GraphicElems {
constructor(x = 0, y = 0, radius = 50, color = 'black', angle = 0, startAngle = 0, endAngle = Math.PI / 3, width = 3) {
super();
var arc = new fabric.Circle({
radius: radius,
left: x,
top: y,
angle: angle,
startAngle: startAngle,
endAngle: endAngle,
stroke: color,
originX: 'center',
originY: 'center',
fill: '',
strokeWidth: width
});
this.object = arc;
this.left = x;
this.top = y;
this.radius = radius;
this.color = color;
}
}
class SolidArrow extends GraphicElems {
constructor(x = 0, y = 0, height = 50, length = 100, color = 'black') {
super();
var rectangle = new Rectangle(x, y, height / 2, length, color);
var triangle = new Triangle(x + length - height / 2, y, height, height, color);
triangle.rotate(90);
triangle.draw(canvas);
rectangle.draw(canvas);
var group = new Group([rectangle.object, triangle.object], x, y);
this.object = group.object;
this.left = x;
this.top = y;
this.color = color;
this.from = null;
this.to = null;
}
point(from, to) {
this.from = from;
this.to = to;
var originX = from.getX() + from.width / 2;
var originY = from.getY() + from.height / 2;
var finalX = to.getX() + to.width / 2;
var finalY = to.getY() + to.height / 2;
var slope = (finalY - originY) / (finalX - originX);
var radian = Math.atan(slope);
var degree = radian * (180 / Math.PI);
this.object.angle = degree;
this.object.top = (finalY - originY) / 2 + (from.object.height - to.object.height) / 2;
this.object.left = (finalX - originX) / 2;
}
}
class CircleChart extends Group {
constructor(nodes = ['A', 'B', 'C', 'D', 'E'], color = ['orange', 'gray', 'yellow', 'blue', 'green'], x = 300, y = 300, circleRadius = 80, chartRadius = 200, arcWidth = 20) {
super();
length = nodes.length
for (var i = 0; i < length; i++) {
var currX = x + Math.sin(2 * Math.PI * i / length) * chartRadius;
var currY = y - Math.cos(2 * Math.PI * i / length) * chartRadius;
var offset = Math.atan(circleRadius / chartRadius)
var arc = new Arc(x, y, chartRadius, color[i], 0, 2 * Math.PI * i / length - Math.PI / 2 - offset, 2 * Math.PI * (i + 1) / length - Math.PI / 2 - offset, arcWidth);
this.add(arc.object)
var circle = new Circle(currX, currY, circleRadius, color[i])
this.add(circle.object)
var text = new Text(nodes[i], currX, currY)
this.add(text.object)
}
}
}
class CurvedArrow extends Group {
constructor(x = 250, y = 250, radius = 50, color = 'black', angle = Math.PI, width = 25) {
super();
var arc = new Arc(x, y, radius, color, 0, 0, angle, width);
var triangle = new Triangle(x + radius, y - width / 2, width, width, color);
triangle.draw(canvas);
arc.draw(canvas);
var group = new Group([arc.object, triangle.object], x, y);
this.object = group.object;
}
}
class InfinitySymbol extends Group {
constructor(x = 250, y = 250, radius = 75, color = 'black', width = 25) {
super();
var circleLeft = new Arc(x + 1.4 * radius, y, radius, 'black', 0, 0, 1.5 * Math.PI, width)
var circleRight = new Arc(x - 1.4 * radius, y, radius, 'black', 0, 0, 1.5 * Math.PI, width)
circleRight.rotate(45);
circleLeft.rotate(225);
var length = Math.PI * radius * 3.5 / 5;
var rect1 = new Rectangle(x, y, length, width, color);
var rect2 = new Rectangle(x, y, length, width, color);
rect1.rotate(-45);
rect2.rotate(45);
this.add(circleLeft.object);
this.add(circleRight.object);
this.add(rect1.object);
this.add(rect2.object);
}
}
class Line extends Rectangle {
constructor(initialX = 100, initialY = 100, finalX = 25, finalY = 300, width = 1, color = 'black') {
var length = Math.sqrt(Math.pow(Math.abs(initialX - finalX), 2) + Math.pow(Math.abs(initialY - finalY), 2))
var slope = (finalY - initialY) / (finalX - initialX);
var radian = Math.atan(slope);
var degree = radian * (180 / Math.PI);
super(initialX, initialY, width, length, color);
this.setAngle(degree);
}
}
class PathChart extends Group {
constructor(pathLeft = ['Agile Adoption', 'Differential Testing Services', 'Continuous'], pathRight = ['Remote Support', 'Managed Services', 'Outcome Based Models'], pathCenter = ['IT Transformation', 'IT Consulting'], goal = "DevOp Services!", x = 300, y = 300, rectangleHeight = 50, rectangleWidth = 150, fontSize = 15) {
super();
var goalBox = new Rectangle(x, y, rectangleHeight, rectangleWidth);
this.add(goalBox.object);
var goalText = new Text(goal, x, y, 'black', fontSize);
this.add(goalText.object);
// Arrays go from left to right, top to bottom
var sideX = [x - rectangleWidth * 1.5, x + rectangleWidth * 1.5];
var bottomArrowX = [x - rectangleWidth, x + rectangleWidth];
var centerTextY = [y - rectangleHeight * 6, y - rectangleHeight * 3];
var centerArrowY = [y - rectangleHeight * 4.5, y - rectangleHeight * 1.5];
var sideTextY = [y - rectangleHeight * 6, y - rectangleHeight * 4, y - rectangleHeight * 2];
var sideArrowY = [y - rectangleHeight * 5, y - rectangleHeight * 3, y];
// Create the center
var centerLength = centerTextY.length;
for (var i = 0; i < centerLength; i++) {
var textBox = new Rectangle(x, centerTextY[i], rectangleHeight, rectangleWidth);
this.add(textBox.object);
var text = new Text(pathCenter[i], x, centerTextY[i], 'black', fontSize);
this.add(text.object);
var arrow = new SolidArrow(x, centerArrowY[i], 50, rectangleHeight, 'black');
arrow.rotate(90);
this.add(arrow.object);
}
// Create the side paths
var sides = sideX.length;
for (var i = 0; i < sides; i++) {
var sideHeight = sideTextY.length;
if (i == 0) {
var sideArray = pathLeft;
}
else {
var sideArray = pathRight;
}
for (var j = sideHeight - 1; j >= 0; j--) {
var textBox = new Rectangle(sideX[i], sideTextY[j], rectangleHeight, rectangleWidth);
this.add(textBox.object);
var text = new Text(sideArray[j], sideX[i], sideTextY[j], 'black', fontSize);
this.add(text.object);
if(j != sideHeight - 1) {
var arrow = new SolidArrow(sideX[i], sideArrowY[j], 50, rectangleHeight, 'black');
arrow.rotate(90);
this.add(arrow.object);
}
else {
var arrow = new SolidArrow(bottomArrowX[i], sideArrowY[j], 50, rectangleHeight * 1.75, 'black');
if(i == 1) {
arrow.rotate(180);
}
this.add(arrow.object);
var extension = new Rectangle(sideX[i], sideArrowY[j] - 25, 75, 25, 'black');
this.add(extension.object);
}
}
}
}
}
class Person extends Group {
constructor() {
super();
var head = new Circle(50, 50, 20, 'black');
this.add(head.object);
var body = new Rectangle(50, 100, 100, 10, 'black');
this.add(body.object);
var leftHand = new Rectangle(30, 100, 50, 10, 'black');
leftHand.rotate(45);
this.add(leftHand.object);
var rightHand = new Rectangle(70, 100, 50, 10, 'black');
rightHand.rotate(-45);
this.add(rightHand.object);
var leftLeg = new Rectangle(30, 160, 50, 10, 'black');
leftLeg.rotate(45);
this.add(leftLeg.object);
var rightLeg = new Rectangle(70, 160, 50, 10, 'black');
rightLeg.rotate(-45);
this.add(rightLeg.object);
}
withBug(){
var bugBox = new Rectangle(100,100,50,50,'black');
this.add(bugBox.object);
var bugText = new Text('Bug',100,100,'white');
this.add(bugText.object);
}
}
// Global Variables
var canvas = createCanvas(800, 800);
// functions below:
function createCanvas(canvasHeight, canvasWidth) { //don't have to be a class
var canvas = new fabric.Canvas('canvas');
canvas.setHeight(canvasHeight);
canvas.setWidth(canvasWidth);
return canvas;
}
function create() {
//var person = new Person();
//person.withBug();
//person.draw(canvas);
// var circle = new Circle();
// var text = new Text('aaa');
// circle.draw(canvas)
// text.draw(canvas)
// var group = new Group([circle.object, text.object], 200, 300);
// group.draw(canvas);
//
// var rectangle = new Rectangle();
// rectangle.draw(canvas);
// rectangle.setAngle(45);
//
// var triangle = new Triangle(x = 300, y = 200);
// triangle.rotate(100);
// triangle.draw(canvas);
//
// var arrow = new SolidArrow(x = 500, y = 500);
// arrow.draw(canvas);
// arrow.point(rectangle, triangle);
// arrow.draw(canvas);
//var chart = new CircleChart()
//chart.draw(canvas)
// var line = new Line();
// line.draw(canvas);
// var curvedArrow = new CurvedArrow(250, 250, 50, 'black', angle = Math.PI / 2, width = 25);
// curvedArrow.draw(canvas);
//var infinitySymbol = new InfinitySymbol();
//infinitySymbol.draw(canvas);
var pathChart = new PathChart();
pathChart.draw(canvas);
//var img = new Image("lib/images/cat.jpg", 10, 10, 150, 150);
//img.draw(canvas);
}