I need a code to do the follow things: I've an image definited to Kinetic.Image, and this image should rotate; I have to use the drag and drop on this image, but the rotation doesn't allow the drag and drop. Can you give me a code to do this? I searched some tutorials but they don't help me. Thank you
KineticJS images are both draggable and rotatable already.
For the "drop", you can listen for the drop event on the image like this:
kImage.on('dragend', function() {
// do your drop tests here
});
Here is code and a Fiddle: http://jsfiddle.net/m1erickson/eCekf/
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Prototype</title>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.5.4.min.js"></script>
<style>
#container{
border:solid 1px #ccc;
margin-top: 10px;
width:400px;
height:400px;
}
</style>
<script>
$(function(){
var stage = new Kinetic.Stage({
container: 'container',
width: 400,
height: 400
});
var layer = new Kinetic.Layer();
stage.add(layer);
var kImage;
var img=new Image();
img.onload=function(){
kImage=new Kinetic.Image({
image:img,
x:175,
y:175,
width:150,
height:150,
offset:[75,75],
draggable:true
});
layer.add(kImage);
kImage.rotate(30*Math.PI/180);
layer.draw();
}
img.src="https://dl.dropboxusercontent.com/u/139992952/stackoverflow/house-icon.png";
$("#rotate").click(function(){
kImage.rotate(kImage.getRotation()+20*Math.PI/180);
layer.draw();
});
}); // end $(function(){});
</script>
</head>
<body>
<div id="container"></div>
<button id="rotate">Rotate</button>
</body>
</html>
Related
The issue was already posted here, but I think was never addressed. I need to create a new rect each time I click "Create SVG Rect" button. Hence drawing multiple rectangles.
<!DOCTYPE html>
<html lang="en">
<head><style>#test_slide { width: 500px; height: 500px; cursor: crosshair;border: solid;}</style></head><body>
<div id="test_slide"></div>
<button id="create_svg_rect" >Create SVG Rect</button>
<!--SCRIPT FILES-->
<script src="https://code.jquery.com/jquery-3.3.1.min.js" defer="defer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/svg.js/2.7.1/svg.min.js" type="text/javascript" defer="defer"></script>
<script src="https://svgjs.dev/svg.draw.js/demo/svg.draw.min.js" type="text/javascript" defer="defer"></script>
<script>
document.getElementById("create_svg_rect").onclick = function() {
//SVG.on(document, 'DOMContentLoaded', function() {
var drawing = new SVG('test_slide').size('100%', '100%');
var rect = drawing.rect().attr('stroke-width',1).attr('fill','none');
drawing.on('mousedown', function(e){
rect.draw(e);
}, false);
drawing.on('mouseup', function(e){
rect.draw('stop', e);
console.log(rect.svg());
return;
}, false);
//});
};
</script>
</body></html>
In your code you were creating a whole new drawing and listeners everytime you click on the button. Thats not what you want.
Instead, just create one drawing (<svg>) and attach the listeners to it.
A click on the button only has to create a new rectangle.
To be able to access the rect-var in the listeners we have to define it in the outer scope. On click, we create a new rect and save it. On mousedown we start drawing and on mouseup we finish.
Here is working snippet:
document.addEventListener('DOMContentLoaded',() => {
let rect, drawing = new SVG('test_slide').size('100%', '100%');
drawing.on('mousedown', function(e){
rect && rect.draw(e);
});
drawing.on('mouseup', function(e){
if (rect) {
rect.draw('stop', e);
console.log(rect.svg());
rect = null;
}
});
document.getElementById("create_svg_rect").addEventListener('click', function() {
rect = drawing.rect().attr('stroke-width',1).attr('fill','none');
});
})
#test_slide { width: 500px; height: 160px; cursor: crosshair;border: solid;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/svg.js/2.7.1/svg.min.js" type="text/javascript"></script>
<script src="https://svgjs.dev/svg.draw.js/demo/svg.draw.min.js" type="text/javascript"></script>
<div id="test_slide"></div>
<button id="create_svg_rect" >Create SVG Rect</button>
Since your code didnt use any jquery I removed it from the snippet.
I've created an presentation with Adobe Animate HTML5 canvas and now I want to add a simple animation that hides once the presentation is loaded. I have the animation and placed it in the HTML just fine, but I can't figure out how to make it go away once everything is loaded. Here is the code:
<html>
<head>
<meta charset="UTF-8">
<title>Intervention</title>
<!-- write your code here -->
<script src="https://code.createjs.com/createjs-2015.11.26.min.js"></script>
<script src="Intervention.js"></script>
<script>
var canvas, stage, exportRoot;
function init() {
// --- write your JS code here ---
canvas = document.getElementById("canvas");
var loader = new createjs.LoadQueue(false);
loader.installPlugin(createjs.Sound);
loader.addEventListener("complete", handleComplete);
loader.loadManifest(lib.properties.manifest);
}
function handleComplete(evt) {
exportRoot = new lib.Intervention();
stage = new createjs.Stage(canvas);
stage.addChild(exportRoot);
stage.update();
stage.enableMouseOver();
createjs.Ticker.setFPS(lib.properties.fps);
createjs.Ticker.addEventListener("tick", stage);
}
function playSound(id, loop) {
return createjs.Sound.play(id, createjs.Sound.INTERRUPT_EARLY, 0, 0, loop);
}
</script>
<!-- write your code here -->
</head>
<body onload="init();" style="background-color:#D4D4D4;margin:0px;">
<canvas id="canvas" width="833" height="510" style="background-color:#FFFFFF"></canvas>
<div id="MyLoader" style="position: absolute; top: 255px; left: 416px;"><img src="./images/myloader.gif"></div>
</body>
</html>
What do I place and where so that "MyLoader" will hide after the canvas has loaded?
Thank so much!
The handleComplete method fires when the JavaScript and its manifest are all loaded, so you can put the code to hide the loader in there.
function handleComplete(evt) {
document.getElementById("MyLoader").style.display = "none";
// other code in this method not shown...
}
I am new to learn JCanvas. I am trying to implement a simple JCanvas program.
Here is my code:
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"> </script>
<script src='jcanvas.min.js'></script>
</head>
<body>
<canvas id="drawingCanvas" width="500" height="500" style="border:1px solid black;align:center;"></canvas>
<script>
var canvas = document.getElementById("drawingCanvas");
var ctx = canvas.getContext("2d");
$('canvas').drawArc({
strokeStyle: 'green',
draggable: true,
x:100, y:100,
radius: 50
});
</script>
</body>
</html>
But I am unable to Implement the above.
The Circle I am trying to draw here is not getting displayed on the canvas.
What Am I doing wrong?
Looks like your code is quite fine itself. Consider wrapping your code in $(document).ready(function () {});, like this:
<script>
$(document).ready(function () {
$('canvas#drawingCanvas').drawArc({
strokeStyle: 'green',
draggable: true,
x:100, y:100,
radius: 50
});
});
</script>
This guarantees that your code will executed when the whole DOM structure is loaded in browser memory and ready to interact with JavaScript. See jQuery docs for more details.
I've also created jsFiddle, where your code just works. I attached the jCanvas using URL from here, so it might stop working occasionally.
UPDATE: removed unused variables from the code, added id to jQuery selector.
UPDATE2: Without jsFiddle, it should look like that
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<title>Sample</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="http://calebevans.me/projects/jcanvas/resources/jcanvas/jcanvas.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$('canvas#drawingCanvas').drawArc({
strokeStyle: 'green',
draggable: true,
x:100, y:100,
radius: 50
});
});
</script>
</head>
<body>
<canvas id="drawingCanvas" width="500" height="500" style="border:1px solid black;align:center;"></canvas>
</body>
</html>
UPDATE3: Please do not use jCanvas attaching like in the sample above, the link was grabbed from jCanvas showroom and is not supposed to be reliable CDN. It might be changed or removed, and it might not be ready to high load.
there are probably other ways, but this works. I sourced jCanvas and jQuery internally
<!DOCTYPE html>
<html>
<head>
<script src="jquery.js"></script>
<script src='jcanvas.min.js'></script>
<script>
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");
function init(){
$("canvas").drawArc({
strokeStyle: 'green',
draggable: true,
x:100, y:100,
radius: 50
});
}
</script>
</head>
<body onload="init()">
<canvas id="canvas" width="500" height="500" style="border:1px solid black;align:center;"></canvas>
</body>
</html>
How can I display whole image in circulr shape using Javascript or HTML5. I tried the code below but with this code only part of the image will be converted into circular shape. How can I make the whole display in circular shape?
<!DOCTYPE HTML>
<html>
<head>
<style>
body {
margin: 0px;
padding: 0px;
}
#myCanvas {
border: 1px solid #9C9898;
}
</style>
<script type="text/javascript" >
</script>
</head>
<body>
<canvas id="myCanvas" width="578" height="200"></canvas>
<div id="myCanvas"></div>
<script>
var ctx = document.getElementById('myCanvas').getContext("2d");
ctx.arc(100,100, 50, 0, Math.PI*2,true); // you can use any shape
ctx.clip();
var img = new Image();
img.addEventListener('load', function(e) {
ctx.drawImage(this, 0, 0, 200, 300);
}, true);
img.src="images/hospital_review_profile_placeholder.png";
</script>
</body>
</html>
Instead of using ctx.clip(), you would resize and reposition your image to fit in your circle.
Here is code that will resize your image to its largest size that will fit in the circle.
Then the code positions the resized image properly in the circle.
Here is a Fiddle --- http://jsfiddle.net/m1erickson/s6MzZ/
<!doctype html>
<html>
<head>
<link rel="stylesheet" type="text/css" media="all" href="css/reset.css" /> <!-- reset css -->
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<style>
body{ background-color: ivory; }
canvas{border:1px solid red;}
</style>
<script>
$(function(){
var canvas=document.getElementById("canvas");
var ctx=canvas.getContext("2d");
var radius=50; // circle radius
var fullWidth=200; // actual width of image in pixels
var fullHeight=300; // actual height of image in pixels
var centerX=100; // center X coordinate of the circle
var centerY=100; // center Y coordinate of the Circle
// the image must be resized to fit into the circle
// Call CalcResizedImageDimensions() to get the resized width/height
var size=CalcResizedImageDimensions(radius,fullWidth,fullHeight);
var rectX=centerX-size.width/2; // the X coordinate of the resized rectangle
var rectY=centerY-size.height/2 // the Y coordinate of the resized rectangle
ctx.beginPath();
ctx.arc(centerX,centerY,radius,0,Math.PI*2,true);
// I illustrate with just a rectangle
// you would drawImage() instead
ctx.rect(rectX,rectY,size.width,size.height);
ctx.stroke();
function CalcResizedImageDimensions(r,w,h){
var d=2*r;
var newH=(d*h)/Math.sqrt(w*w+h*h);
var newW=w/h*newH;
return({width:newW,height:newH});
}
}); // end $(function(){});
</script>
</head>
<body>
<canvas id="canvas" width=200 height=200></canvas>
</body>
</html>
I am new to RaphaelJS. I am trying to add click listener and keyboard listener to the canvas with no success. Can someone please explain how to use click listener and keyboard listener on Raphael. A small example will be of great help.
Thank you.
Here is a click and mouseover example, you can use more jQuery in there to simplify it but I just wanted to use the document ready function. Shouldn't be too much to add a keyboard event in there:
<html>
<head>
<script type="text/javascript" src="http://github.com/DmitryBaranovskiy/raphael/blob/master/raphael-min.js?raw=true"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function()
{
var paper = new Raphael(document.getElementById('canvas_container'), 500, 500);
var circ = paper.circle(250, 250, 40);
circ.node.onmouseover = function()
{
this.style.cursor = 'pointer';
};
circ.node.onclick = function()
{
circ.animate({opacity: 0}, 2000, function()
{
this.remove();
});
}
});
</script>
<style type="text/css">
#canvas_container
{
width: 500px;
border: 1px solid #aaa;
}
</style>
</head>
<body>
<div id="canvas_container"></div>
</body>
</html>