Marlin_Firmware/Marlin/configurator/js/jcanvas.js
Scott Lahteine ef18bfdd3f An in-place browser-based configurator utility
- A web form with fields for configuration values
- Reads and parses standard config files
- Modifies configurations dynamically in-place
2015-02-05 07:05:29 -08:00

524 lines
12 KiB
JavaScript

/*!
jCanvas v2.2.1
Caleb Evans
2.2.1 revisions by Thinkyhead
*/
(function($, document, Math, Number, undefined) {
// jC global object
var jC = {};
jC.originals = {
width: 20,
height: 20,
cornerRadius: 0,
fillStyle: 'transparent',
strokeStyle: 'transparent',
strokeWidth: 5,
strokeCap: 'butt',
strokeJoin: 'miter',
shadowX: 0,
shadowY: 0,
shadowBlur: 10,
shadowColor: 'transparent',
x: 0, y: 0,
x1: 0, y1: 0,
radius: 10,
start: 0,
end: 360,
ccw: false,
inDegrees: true,
fromCenter: true,
closed: false,
sides: 3,
angle: 0,
text: '',
font: 'normal 12pt sans-serif',
align: 'center',
baseline: 'middle',
source: '',
repeat: 'repeat'
};
// Duplicate original defaults
jC.defaults = $.extend({}, jC.originals);
// Set global properties
function setGlobals(context, map) {
context.fillStyle = map.fillStyle;
context.strokeStyle = map.strokeStyle;
context.lineWidth = map.strokeWidth;
context.lineCap = map.strokeCap;
context.lineJoin = map.strokeJoin;
context.shadowOffsetX = map.shadowX;
context.shadowOffsetY = map.shadowY;
context.shadowBlur = map.shadowBlur;
context.shadowColor = map.shadowColor;
}
// Close path if chosen
function closePath(context, map) {
if (map.closed === true) {
context.closePath();
context.fill();
context.stroke();
} else {
context.fill();
context.stroke();
context.closePath();
}
}
// Measure angles in degrees if chosen
function checkUnits(map) {
if (map.inDegrees === true) {
return Math.PI / 180;
} else {
return 1;
}
}
// Set canvas defaults
$.fn.canvas = function(args) {
// Reset defaults if no value is passed
if (typeof args === 'undefined') {
jC.defaults = jC.originals;
} else {
jC.defaults = $.extend({}, jC.defaults, args);
}
return this;
};
// Load canvas
$.fn.loadCanvas = function(context) {
if (typeof context === 'undefined') {context = '2d';}
return this[0].getContext(context);
};
// Create gradient
$.fn.gradient = function(args) {
var ctx = this.loadCanvas(),
// Specify custom defaults
gDefaults = {
x1: 0, y1: 0,
x2: 0, y2: 0,
r1: 10, r2: 100
},
params = $.extend({}, gDefaults, args),
gradient, stops = 0, percent, i;
// Create radial gradient if chosen
if (typeof args.r1 === 'undefined' && typeof args.r2 === 'undefined') {
gradient = ctx.createLinearGradient(params.x1, params.y1, params.x2, params.y2);
} else {
gradient = ctx.createRadialGradient(params.x1, params.y1, params.r1, params.x2, params.y2, params.r2);
}
// Count number of color stops
for (i=1; i<=Number.MAX_VALUE; i+=1) {
if (params['c' + i]) {
stops += 1;
} else {
break;
}
}
// Calculate color stop percentages if absent
for (i=1; i<=stops; i+=1) {
percent = Math.round((100 / (stops-1)) * (i-1)) / 100;
if (typeof params['s' + i] === 'undefined') {
params['s' + i] = percent;
}
gradient.addColorStop(params['s' + i], params['c' + i]);
}
return gradient;
};
// Create pattern
$.fn.pattern = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
pattern,
img = document.createElement('img');
img.src = params.source;
// Create pattern
function create() {
if (img.complete === true) {
// Create pattern
pattern = ctx.createPattern(img, params.repeat);
} else {
throw "The pattern has not loaded yet";
}
}
try {
create();
} catch(error) {
img.onload = create;
}
return pattern;
};
// Clear canvas
$.fn.clearCanvas = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args);
// Draw from center if chosen
if (params.fromCenter === true) {
params.x -= params.width / 2;
params.y -= params.height / 2;
}
// Clear entire canvas if chosen
ctx.beginPath();
if (typeof args === 'undefined') {
ctx.clearRect(0, 0, this.width(), this.height());
} else {
ctx.clearRect(params.x, params.y, params.width, params.height);
}
ctx.closePath();
return this;
};
// Save canvas
$.fn.saveCanvas = function() {
var ctx = this.loadCanvas();
ctx.save();
return this;
};
// Restore canvas
$.fn.restoreCanvas = function() {
var ctx = this.loadCanvas();
ctx.restore();
return this;
};
// Scale canvas
$.fn.scaleCanvas = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args);
ctx.save();
ctx.translate(params.x, params.y);
ctx.scale(params.width, params.height);
ctx.translate(-params.x, -params.y)
return this;
};
// Translate canvas
$.fn.translateCanvas = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args);
ctx.save();
ctx.translate(params.x, params.y);
return this;
};
// Rotate canvas
$.fn.rotateCanvas = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
toRad = checkUnits(params);
ctx.save();
ctx.translate(params.x, params.y);
ctx.rotate(params.angle * toRad);
ctx.translate(-params.x, -params.y);
return this;
};
// Draw rectangle
$.fn.drawRect = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
toRad = checkUnits(params),
x1, y1, x2, y2, r;
setGlobals(ctx, params);
// Draw from center if chosen
if (params.fromCenter === true) {
params.x -= params.width / 2;
params.y -= params.height / 2;
}
// Draw rounded rectangle if chosen
if (params.cornerRadius > 0) {
x1 = params.x;
y1 = params.y;
x2 = params.x + params.width;
y2 = params.y + params.height;
r = params.cornerRadius;
if ((x2 - x1) - (2 * r) < 0) {
r = (x2 - x1) / 2;
}
if ((y2 - y1) - (2 * r) < 0) {
r = (y2 - y1) / 2;
}
ctx.beginPath();
ctx.moveTo(x1+r,y1);
ctx.lineTo(x2-r,y1);
ctx.arc(x2-r, y1+r, r, 270*toRad, 360*toRad, false);
ctx.lineTo(x2,y2-r);
ctx.arc(x2-r, y2-r, r, 0, 90*toRad, false);
ctx.lineTo(x1+r,y2);
ctx.arc(x1+r, y2-r, r, 90*toRad, 180*toRad, false);
ctx.lineTo(x1,y1+r);
ctx.arc(x1+r, y1+r, r, 180*toRad, 270*toRad, false);
ctx.fill();
ctx.stroke();
ctx.closePath();
} else {
ctx.fillRect(params.x, params.y, params.width, params.height);
ctx.strokeRect(params.x, params.y, params.width, params.height);
}
return this;
};
// Draw arc
$.fn.drawArc = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
toRad = checkUnits(params);
setGlobals(ctx, params);
// Draw from center if chosen
if (params.fromCenter === false) {
params.x += params.radius;
params.y += params.radius;
}
ctx.beginPath();
ctx.arc(params.x, params.y, params.radius, (params.start*toRad)-(Math.PI/2), (params.end*toRad)-(Math.PI/2), params.ccw);
// Close path if chosen
closePath(ctx, params);
return this;
};
// Draw ellipse
$.fn.drawEllipse = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
controlW = params.width * (4/3);
setGlobals(ctx, params);
// Draw from center if chosen
if (params.fromCenter === false) {
params.x += params.width / 2;
params.y += params.height / 2;
}
// Increment coordinates to prevent negative values
params.x += 1e-10;
params.y += 1e-10;
// Create ellipse
ctx.beginPath();
ctx.moveTo(params.x, params.y-params.height/2);
ctx.bezierCurveTo(params.x-controlW/2,params.y-params.height/2,
params.x-controlW/2,params.y+params.height/2,
params.x,params.y+params.height/2);
ctx.bezierCurveTo(params.x+controlW/2,params.y+params.height/2,
params.x+controlW/2,params.y-params.height/2,
params.x,params.y-params.height/2);
ctx.closePath();
ctx.fill();
ctx.stroke();
return this;
};
// Draw line
$.fn.drawLine = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
max = Number.MAX_VALUE, l,
lx, ly;
setGlobals(ctx, params);
// Draw each point
ctx.beginPath();
ctx.moveTo(params.x1, params.y1);
for (l=2; l<max; l+=1) {
lx = params['x' + l];
ly = params['y' + l];
// Stop loop when all points are drawn
if (typeof lx === 'undefined' || typeof ly === 'undefined') {
break;
}
ctx.lineTo(lx, ly);
}
// Close path if chosen
closePath(ctx, params);
return this;
};
// Draw quadratic curve
$.fn.drawQuad = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
max = Number.MAX_VALUE, l,
lx, ly, lcx, lcy;
setGlobals(ctx, params);
// Draw each point
ctx.beginPath();
ctx.moveTo(params.x1, params.y1);
for (l=2; l<max; l+=1) {
lx = params['x' + l];
if (typeof lx === 'undefined') break;
ly = params['y' + l];
if (typeof ly === 'undefined') break;
lcx = params['cx' + (l-1)];
if (typeof lcx === 'undefined') break;
lcy = params['cy' + (l-1)];
if (typeof lcy === 'undefined') break;
ctx.quadraticCurveTo(lcx, lcy, lx, ly);
}
// Close path if chosen
closePath(ctx, params);
return this;
};
// Draw Bezier curve
$.fn.drawBezier = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
max = Number.MAX_VALUE,
l=2, lc=1, lx, ly, lcx1, lcy1, lcx2, lcy2, i;
setGlobals(ctx, params);
// Draw each point
ctx.beginPath();
ctx.moveTo(params.x1, params.y1);
for (i=2; i<max; i+=1) {
lx = params['x' + l];
if (typeof lx === 'undefined') break;
ly = params['y' + l];
if (typeof ly === 'undefined') break;
lcx1 = params['cx' + lc];
if (typeof lcx1 === 'undefined') break;
lcy1 = params['cy' + lc];
if (typeof lcy1 === 'undefined') break;
lcx2 = params['cx' + (lc+1)];
if (typeof lcx2 === 'undefined') break;
lcy2 = params['cy' + (lc+1)];
if (typeof lcy2 === 'undefined') break;
ctx.bezierCurveTo(lcx1, lcy1, lcx2, lcy2, lx, ly);
l += 1;
lc += 2;
}
// Close path if chosen
closePath(ctx, params);
return this;
};
// Draw text
$.fn.drawText = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args);
setGlobals(ctx, params);
// Set text-specific properties
ctx.textBaseline = params.baseline;
ctx.textAlign = params.align;
ctx.font = params.font;
ctx.strokeText(params.text, params.x, params.y);
ctx.fillText(params.text, params.x, params.y);
return this;
};
// Draw image
$.fn.drawImage = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
// Define image source
img = document.createElement('img');
img.src = params.source;
setGlobals(ctx, params);
// Draw image function
function draw() {
if (img.complete) {
var scaleFac = img.width / img.height;
// If width/height are specified
if (typeof args.width !== 'undefined' && typeof args.height !== 'undefined') {
img.width = args.width;
img.height = args.height;
// If width is specified
} else if (typeof args.width !== 'undefined' && typeof args.height === 'undefined') {
img.width = args.width;
img.height = img.width / scaleFac;
// If height is specified
} else if (typeof args.width === 'undefined' && typeof args.height !== 'undefined') {
img.height = args.height;
img.width = img.height * scaleFac;
}
// Draw from center if chosen
if (params.fromCenter === true) {
params.x -= img.width / 2;
params.y -= img.height / 2;
}
// Draw image
ctx.drawImage(img, params.x, params.y, img.width, img.height);
} else {
throw "The image has not loaded yet.";
}
}
function dodraw() {
// console.log("dodraw...");
try {
// console.log("dodraw...try...");
draw();
}
catch(error) {
// console.log("dodraw...catch: " + error);
}
}
// Draw image if already loaded
// console.log("--------------------");
// console.log("drawImage " + img.src);
try {
// console.log("try...");
draw();
} catch(error) {
// console.log("catch: " + error);
img.onload = dodraw;
}
return this;
};
// Draw polygon
$.fn.drawPolygon = function(args) {
var ctx = this.loadCanvas(),
params = $.extend({}, jC.defaults, args),
theta, dtheta, x, y,
toRad = checkUnits(params), i;
setGlobals(ctx, params);
if (params.sides >= 3) {
// Calculate points and draw
theta = (Math.PI/2) + (Math.PI/params.sides) + (params.angle*toRad);
dtheta = (Math.PI*2) / params.sides;
for (i=0; i<params.sides; i+=1) {
x = params.x + (params.radius * Math.cos(theta)) + 1e-10;
y = params.y + (params.radius * Math.sin(theta)) + 1e-10;
if (params.fromCenter === false) {
x += params.radius;
y += params.radius;
}
ctx.lineTo(x, y);
theta += dtheta;
}
closePath(ctx, params);
}
return this;
};
return window.jCanvas = jC;
}(jQuery, document, Math, Number));