Develop Reference

How to change color with using anychart-core js?

I have created a dynamic chart using any-chart core js library link https://docs.anychart.com/
The code is
var chart = anychart.radar();
// set chart yScale settings
chart.yScale()
.minimum(0)
.maximum(10)
.ticks({'interval':2});
chart.yGrid().stroke({
color: "rgba(0, 0, 0, 0.4)",
thickness: 1,
opacity: 1,
});
chart.xGrid().stroke({
color: "rgba(0, 0, 0, 0.4)",
thickness: 1,
opacity: 1
});
// create first series
chart.line(data1);
// set chart title
chart.title("");
// set container id for the chart
chart.container('spider_graph');
// initiate chart drawing
chart.draw();
// set data and adjust visualisation
var series = chart.line(data1);
// enable markers on series
series.markers(true);
it will add marker also like
so the pointers are conneceted with line i want to change that color red to anything else.
If i didn't create marker the color is applied using chart.palette(["Yellow"]); but i want both marker with diffrent color line.
Any help is appriciated.

To have different line and markers colors, you’ll need to use fill() method for the markers(), and as you correctly mentioned palette() method for the line color.
// change color for the line
chart.palette(["Blue"]);
// change color of the markers
series.markers().fill("red");
Shown in sample here: https://playground.anychart.com/oEm8K8hK/4

SVG Snap select a group by it's ID

I'm trying to get an SVG Snap element by it's id. First I create a canvas:
var s = Snap("#svgout"), //creates the canvas
Then I cerate a group:
var rect = s.rect(posx, posy, 40, 40, 6).attr({
fill: "none",
stroke: "#F44336",
strokeWidth: 3,
});
var group = s.group(rect).attr({
cursor: "move",
});
and next I get the id of the group that is defaulted by SVG Snap
var currGroupId = group.id;
Now, when I try to reference my group later in my code and get it by it's id,
s.select(currGroupId);
I get null. How do I properly select an element by it's id?

select will use a cssSelector, as in container.queryAll.
So I don't think Snap sets an id as an svg attribute (do correct me if I'm wrong). Which means if you want to use select, you may have to manually set it.
Also I susect s.select(id) wouldn't work, I think it would have to be s.select('#'.id) but I may be wrong. If you can get a fiddle up, it will be easier to test.

SnapSVG doesn't automatically set the ID attribute of the group. Instead it adds a field to the object itself. One way of getting around this limitation is to do the following.
var s = Snap("#svgout");
var rect = s.rect(posx, posy, 40, 40, 6).attr({
fill: "none",
stroke: "#F44336",
strokeWidth: 3,
});
var group = s.group(rect).attr({
cursor: "move",
});
Explicitly set the ID.
group.attr({
id: group.id
});
var currGroupId = group.id;
select uses CSS selectors. So we must add a '#' to the start of the ID.
s.select("#" + currGroupId);
Note: This method has been tested by me using SnapSVG V0.4.1
If this does not work and you are using jQuery. try:
$("#"+currGroupId);

How to apply a filter to a shape with image fill in KonvaJS?

I'm using Konva.js to do some canvas animations. I have circle shapes, with an image fill, and would like to apply a color overlay/filter to the shape (RGBA).
This is how I'm creating the Shape object:
var konvaObject = new Konva.Circle({
x: 100,
y: 100,
radius: 300,
stroke: this.color,
strokeWidth: 6,
fillPatternRepeat: 'no-repeat',
});
// load the image into the shape:
var imageObj = new Image();
imageObj.onload = function () {
konvaObject.fillPatternImage(imageObj);
konvaObject.draw();
}
imageObj.src = 'www.demo.com/anImageName.png';
demo: http://jsbin.com/winugimeme/edit?js,output
The Docs outline an RGBA filter, however as far as I can tell it can only be applied to Konva.Image items.
Is there a way to re-work my above code so that I can apply filters to the shape object/fill image?

According to filter documentation, you have to cache shape before applying filters http://konvajs.github.io/api/Konva.Filters.html#RGBA
node.cache();
node.filters([Konva.Filters.RGBA]);
node.blue(120);
node.green(200);
node.alpha(0.3);
Note: jsbin demo will not work with this example as fill image should be CORS enabled (e.g. hosted on same domain).

Creating WordArt text effects -FabricJs

I am using fabricJs to create wordArts where one can scale, rotate, transform the texts.
The approach would be rotate and skew every character in text at a certain angle.
I am using Itext class of fabric to style each character
here is what I have done but it isn't working.
var canvas = new fabric.Canvas('c')
var text= "Test fabricJs"
var comicSansText = new fabric.IText(text, {
fontFamily: 'Comic Sans',
left: canvas.width/4, top: canvas.width/2 ,
stroke: '#ff1318',
strokeWidth: 1,
strokeStyle:"#fff",
styles:[[{"fill": "red",
"fontSize": 20,
"angle":30,
"transform":"rotate(30deg)"}]]
});
Refer fiddle here http://jsfiddle.net/swesh/c7s9x2fh/

To enable Curved text, you've to add fabric.CurvedText.js.
Download fabric.CurvedText.js
After that, you can set the angle.
Its working for me.

Multiple objects in canvas using kinetic js

I am trying to do an application with canvas and which have multiple objects with events binded to them like, mouse down and mouse up e.t.c.,
I am using kinetic js.
Well My doubt is if I have to draw two circles on canvas using kinetic js. I can use objects directly. But if I have to place 500 circles in the division, Its too difficult to have 500 circle objects to create manually. So, is there any other alternative to implement this one?
I use these events for every circle object I use
var circle = new Kinetic.Circle({
x: 100,
y: 100,
radius: 5,
fill: 'red',
stroke: 'black',
strokeWidth: 1
});
circle.setAttr('fact','Kinetic JS is Awesome')
circle.on('mouseover', function() {
document.body.style.cursor = 'pointer'
});
circle.on('mouseout', function() {
document.body.style.cursor = 'default'
});
circle.on('mousedown', function() {
var fill = this.getFill() == 'red' ? '#00d00f' : 'red';
this.setFill(fill);
alert(this.getAttr('fact'));// I do some stuff here
layer.draw();
});

I recommend also that you check the tutorials of KineticJS, this one is about a stress test: 1000 shapes + their respective tooltips.
http://www.html5canvastutorials.com/labs/html5-canvas-10000-shape-stress-test-with-kineticjs
PS: You just have to copy paste the code and update the KineticJS version here.