jQuery与panzoom可拖动 [英] Jquery draggable with panzoom

问题描述

我正在用女巫制作一个页面，所有内容都使用panzoom缩放.问题是，当我在页面中拖动某些内容时，拖动项的位置不好.

I am working on a page in witch all its contents are scaled by using panzoom. The problem is that when I drag something in the page the dragging item gets a bad position.

推荐答案

我不确定，但也许我找到了答案.

I'm not sure but perhaps I found answer.

这里有两点:

• 拖动对象时请勿移动背景
• 根据背景比例缩放光标移动

在我的缩放背景代码下方，将对象移到其上方. 根据此答案

Below my code for zoomed background and move object over it. Scale cursor based on this answer

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;
    });

这篇关于jQuery与panzoom可拖动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！