Javascript – Fabricjs pan and zoom

canvasfabricjsjavascript

How can I pan and zoom using fabricjs? I've tried using the methods zoomToPoint and setZoom but they do not work for panning. Once I start using different zoom points I start having trouble.

$('#zoomIn').click(function(){
    canvas.setZoom(canvas.getZoom() * 1.1 ) ;
}) ;

$('#zoomOut').click(function(){
    canvas.setZoom(canvas.getZoom() / 1.1 ) ;
}) ;

$('#goRight').click(function(){
    //Need to implement
}) ;

$('#goLeft').click(function(){
    //Need to implement
}) ;

http://jsfiddle.net/hdramos/ux16013L/

Best Solution

Solved it using:

relativePan() absolutePan()

[Update]

$('#goRight').click(function(){
    var units = 10 ;
    var delta = new fabric.Point(units,0) ;
    canvas.relativePan(delta) ;
}) ;

$('#goLeft').click(function(){
    var units = 10 ;
    var delta = new fabric.Point(-units,0) ;
    canvas.relativePan(delta) ;
}) ;
$('#goUp').click(function(){
    var units = 10 ;
    var delta = new fabric.Point(0,-units) ;
    canvas.relativePan(delta) ;
}) ;

$('#goDown').click(function(){
    var units = 10 ;
    var delta = new fabric.Point(0,units) ;
    canvas.relativePan(delta) ;
});

http://jsfiddle.net/ux16013L/2/