i was playing with Fabric.js and aim is to detect mouse down event on an animated object. Currently images are being animated from bottom to top, and when i press mouse down it just shows coordinate but does not detect clicking on Object.
I also noticed that, when images start their animation, only then i can click/select them, after that they become non-selectable
here is a jsfiddle demo of code. please check and suggest.
my html is :
<h3>Hello Fabric</h3>
<div class="mainCanvasContainer">
<canvas class="mainCanvas" id="mycanvas" width="500px" height="400px"></canvas>
</div>
<div id='info'>
</div>
now here is my Javascript:
$(document).ready(function () {
var canvas_id = 'mycanvas';
function showInfo(text){
$('#info').append('<div> '+text+' </div>');
}
(function () {
var canvas = this.__canvas = new fabric.Canvas(canvas_id, {selection: false});
fabric.Object.prototype.originX = fabric.Object.prototype.originY = 'center';
canvas.on('mouse:down', function (options) {
if (options.target) {
showInfo('an object was clicked! ', options.target.type);
}
var cor=options.e.clientX+','+ options.e.clientY;
showInfo(cor);
});
setInterval(function () {
fabric.Image.fromURL('http://www.rashflash.com/fabricjs_animation/img.png', function (img) {
img.scale(0.2);
//img.set('left', fabric.util.getRandomInt(100, 400)).set('top', 450);
//img.movingLeft = !!Math.round(Math.random());
var text = new fabric.Text('hello', {
fontSize: 30,
originX: 'center',
originY: 'center'
});
var group = new fabric.Group([img, text]);
group.set('left', fabric.util.getRandomInt(100, 400)).set('top', 420);
canvas.add(group);
});
}, 1000);
(function animate() {
canvas.forEachObject(function (obj) {
if (!obj) {
return;
}
// obj.left += (obj.movingLeft ? -1 : 1);
obj.top -= 1;
if (obj.left > 500 || obj.top < 0) {
canvas.remove(obj);
}
});
canvas.renderAll();
fabric.util.requestAnimFrame(animate);
})();
})();
});
RashFlash, you are missing setCoords() function when you animate.
Updated function animate:
(function animate() {
canvas.forEachObject(function (obj) {
if (!obj) {
return;
}
// obj.left += (obj.movingLeft ? -1 : 1);
obj.top -= 1;
if (obj.left > 500 || obj.top < 0) {
canvas.remove(obj);
}
obj.setCoords();
});
canvas.renderAll();
fabric.util.requestAnimFrame(animate);
})();
})();
Also, updated fiddle
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