I am trying to implement pinch to zoom using hammer.js
Here's my HTML-
<script src=//cdnjs.cloudflare.com/ajax/libs/hammer.js/1.0.5/hammer.min.js></script>
<div id=pinchzoom>
<div>
<img id=rect src=http://blog.gettyimages.com/wp-content/uploads/2013/01/Siberian-Tiger-Running-Through-Snow-Tom-Brakefield-Getty-Images-200353826-001.jpg width=2835 height=4289 ondragstart=return false alt= />
</div>
</div>
Here's my SCRIPT
var hammertime = Hammer(document.getElementById('pinchzoom'), {
transform_always_block: true,
transform_min_scale: 1,
drag_block_horizontal: false,
drag_block_vertical: false,
drag_min_distance: 0
});
var rect = document.getElementById('rect');
var posX=0, posY=0,
scale=1, last_scale,
rotation= 1, last_rotation;
hammertime.on('touch drag transform', function(ev) {
switch(ev.type) {
case 'touch':
last_scale = scale;
last_rotation = rotation;
break;
case 'drag':
posX = ev.gesture.deltaX;
posY = ev.gesture.deltaY;
break;
case 'transform':
rotation = last_rotation + ev.gesture.rotation;
scale = Math.max(1, Math.min(last_scale * ev.gesture.scale, 10));
break;
}
// transform!
var transform =
//translate3d(+posX+px,+posY+px, 0) +
scale3d(+scale+,+scale+, 0) ;
rect.style.transform = transform;
rect.style.oTransform = transform;
rect.style.msTransform = transform;
rect.style.mozTransform = transform;
rect.style.webkitTransform = transform;
});
It works fine but I am not able to scroll the image. On uncommenting transform3d it works but image looses its position on drag. I can't use jQuery.