How to replace image in canvas using kinetic js
Question
I am developing canvas to create hotel floor view. I am drawing images on canvas from database. I am taking x,y co-ordinates from database and drawing image on that points. But i want to give touch event to those images. I want to replace image on touch or click event. I want to create same functionality as that of book my show .
this is my code.
<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery.min.js"></script>
<script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.7.2.min.js"></script>
<script src="http://code.jquery.com/ui/1.9.2/jquery-ui.min.js"></script>
<style>
#container{
border:solid 1px #ccc;
margin-top: 10px;
width:100%;
height:100%;
}
html,body,kineticjs-content {
width:100%;
height:100%;
margin: 0px;
}
</style>
</head>
<body>
<div id="container"></div>
<script src="http://localhost/zoilo_admin/public/kinetic-v5.1.0.js"></script>
<script defer="defer">
function writeMessage(message) {
text.setText(message);
layer.draw();
}
function loadImages(sources, position, callback) {
var assetDir = '';
var images = {};
var loadedImages = 0;
var numImages = 0;
for (i = 0; i < sources.length; i++)
{
numImages++;
}
for (i = 0; i < sources.length; i++)
{
images[i] = new Image();
images[i].onload = function () {
if (loadedImages == (sources.length - 1)) {
callback(images, position);
}
loadedImages++;
};
images[i].src = assetDir + sources[i];
}
}
function buildStage(images, position) {
var positionIndex = 0;
var tableActual = {};
console.log(images);
for (var i = 0; i < sources.length; i++)
{
console.log("Here");
tableActual[i] = new Kinetic.Image({
image: images[i],
x: position[i].x,
y: position[i].y
});
// var tableName = src;
// var table1 = new Kinetic.Image({
// image: images[src],
// x: position[positionIndex].x,
// y: position[positionIndex].y
// });
tableActual[i].on('click', function () {
console.log(this.index);
var image = new Kinetic.Image({
image: '4top.png',
x: position[this.index].x,
y: position[this.index].y
});
drawImage(image);
switch (this.index)
{
case 0:
writeMessage('Click on Table ' + 0);
tableActual[positionIndex] = new Kinetic.Image({
image: images[positionIndex],
x: position[positionIndex].x,
y: position[positionIndex].y
});
this.setIm = "4top.png";
break;
case 1:
writeMessage('Click on Table ' + 1);
break;
case 2:
writeMessage('Click on Table ' + 2);
break;
case 3:
writeMessage('Click on Table ' + 3);
break;
case 4:
writeMessage('Click on Table ' + 4);
break;
}
writeMessage('mouseover ' + this[src]);
});
drawImage(tableActual[i]);
positionIndex++;
}
// finally, we need to redraw the layer hit graph
layer.drawHit();
}
var stage = new Kinetic.Stage({
container: 'container',
width: $(window).width(),
height: $(window).height()
});
var layer = new Kinetic.Layer();
var text = new Kinetic.Text({
x: 10,
y: 10,
fontFamily: 'Calibri',
fontSize: 24,
text: '',
fill: 'black'
});
var sources = [
'house204-2.jpg',
'house204-1.jpg',
'4top.png',
'house204-1.jpg',
'4top.png'
];
var position = [
{
x: 380,
y: 60
},
{
x: 180,
y: 60
}
,
{
x: 90,
y: 60
},
{
x: 260,
y: 60
},
{
x: 50,
y: 60
}
];
loadImages(sources, position, buildStage);
function drawImage(Image)
{
layer.add(Image);
layer.add(text);
stage.add(layer);
// in order to ignore transparent pixels in an image when detecting
// events, we first need to cache the image
Image.cache();
// next, we need to redraw the hit graph using the cached image
Image.drawHitFromCache();
}
</script>
</body>
</html>
1 answers
solution1
2 ACCPTED 2015-02-27 09:01:22
Yes! you can change it on touch/click event by changing source of that java script image.
<div id="container"></div>
<script src="http://d3lp1msu2r81bx.cloudfront.net/kjs/js/lib/kinetic-v4.4.3.min.js"></script>
<script defer="defer">
var stage = new Kinetic.Stage({
container: 'container',
width: 578,
height: 200
});
var layer = new Kinetic.Layer();
var imageObj = new Image();
imageObj.onload = function() {
var yoda = new Kinetic.Image({
x: 140,
y: stage.getHeight() / 2 - 59,
image: imageObj,
width: 106,
height: 118
});
var filteredYoda = new Kinetic.Image({
x: 320,
y: stage.getHeight() / 2 - 59,
image: imageObj,
width: 106,
height: 118
});
// add the shape to the layer
layer.add(yoda);
layer.add(filteredYoda);
// add the layer to the stage
stage.add(layer);
stage.on('click',function(){
imageObj.src = 'http://crushlabs.com/wp-content/uploads/2013/01/jacee-terry-hello-card-business-card-design-back.jpg';
});
// apply grayscale filter to second image
filteredYoda.applyFilter(Kinetic.Filters.Grayscale, null, function() {
layer.draw();
});
};
imageObj.src = 'http://www.html5canvastutorials.com/demos/assets/yoda.jpg';
</script>
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