jquery - Jquery 可通过 panzoom 拖动

Question

我正在处理一个页面，它的所有内容都使用 panzoom 进行缩放。问题是当我在页面中拖动某些东西时，拖动项目的位置不好。

Answer 1

我不确定，但也许我找到了答案。

这里有两点：

• 拖动对象时不要移动背景
• 根据背景比例缩放光标移动

---

在我的缩放背景代码下方并将对象移动到它上面。根据这个答案缩放光标

html

<script src = "/js/vendors/jquery-ui.min.js"></script>
<script src = "/js/vendors/jquery.panzoom.min.js"></script>

<div id = "map-viewport">
    <div id = "map">
        <div class = "draggable">1</div>
        <div class = "draggable">2</div>
    </div>
</div>

js

var map = $('#map');
var viewport = $('#map-viewport');

map.panzoom({
    increment: 0.1,
    minScale: 1,
    contain: 'invert'
});

viewport.on('wheel', function( e ) {
    e.preventDefault();
    var delta = e.delta || e.originalEvent.wheelDelta;
    var zoomOut = delta ? delta < 0 : e.originalEvent.deltaY > 0;
    map.panzoom('zoom', zoomOut, {
        increment: 0.2,
        animate: false,
        focal: e.originalEvent
    });
});

var click = { x: 0, y: 0};

$('.draggable')
    .draggable({
        containment: 'parent',
        start: function(e) {
            click.x = e.clientX;
            click.y = e.clientY;
        },

        drag: function(e, ui) {
            var m = map.panzoom('getMatrix');
            var zoom = Math.sqrt(m[0] * m[3]); // zoom don't change proportion and scale 
            var original = ui.originalPosition;

            ui.position = {
                left: (e.clientX - click.x + original.left) / zoom,
                top:  (e.clientY - click.y + original.top ) / zoom
            };
        }
    })
    .on('mousedown', function(e){ 
        e.stopImmediatePropagation(); 
        return false;
    });

Answer 2

给你。我正在使用浏览器js。jquery UI 和 Panzoom 的可拖动性

代码笔链接

var viewport = $('.frame');
var $pz = $('.panzoom');
$pz.panzoom({
  minScale: .8,
  maxScale: 3,
  onPan: function() {
    //  console.log('pan');
  },
  onStart: function(event) {
    //  console.log('start', event);
    return true;
  },
});

$('.item').draggable({
  helper: 'clone',
  appendTo: '.workspace',
  zIndex: 100505,
  stop: function(event, ui) {
    event.target.remove();
  },
});