作为一项实验,我创建了一些div并使用CSS3旋转它们。
.items {
position: absolute;
cursor: pointer;
background: #FFC400;
-moz-box-shadow: 0px 0px 2px #E39900;
-webkit-box-shadow: 1px 1px 2px #E39900;
box-shadow: 0px 0px 2px #E39900;
-moz-border-radius: 2px;
-webkit-border-radius: 2px;
border-radius: 2px;
}
然后我随机设置了它们并通过jQuery使它们可拖动。
$('.items').each(function() {
$(this).css({
top: (80 * Math.random()) + '%',
left: (80 * Math.random()) + '%',
width: (100 + 200 * Math.random()) + 'px',
height: (10 + 10 * Math.random()) + 'px',
'-moz-transform': 'rotate(' + (180 * Math.random()) + 'deg)',
'-o-transform': 'rotate(' + (180 * Math.random()) + 'deg)',
'-webkit-transform': 'rotate(' + (180 * Math.random()) + 'deg)',
});
});
$('.items').draggable();
拖动工作,但我注意到只在webkit浏览器中拖动div时突然跳转,而Firefox中的一切都很好。
如果我删除位置:绝对样式,则“跳跃”会更糟。我认为webkit和gecko之间的转换起源可能存在差异,但默认情况下它们都是元素的中心。
我已经搜索过了,但只提出了有关滚动条或可排序列表的结果。
这是我的问题的工作演示。尝试在Safari / Chrome和Firefox中查看它。 http://jsbin.com/ucehu/
这是webkit中的错误还是浏览器如何呈现webkit?
答案 0 :(得分:33)
这是draggable依赖于jquery offset()
函数和offset()
使用本机js函数getBoundingClientRect()
的结果。最终,这是jquery核心无法弥补与getBoundingClientRect()
相关的不一致性的问题。 Firefox的getBoundingClientRect()
版本忽略了css3转换(旋转),而chrome / safari(webkit)则没有。
here就是这个问题的一个例子。
一个hacky解决方法:
中替换以下内容
//The element's absolute position on the page minus margins
this.offset = this.positionAbs = this.element.offset();
<强>与强>
//The element's absolute position on the page minus margins
this.offset = this.positionAbs = { top: this.element[0].offsetTop,
left: this.element[0].offsetLeft };
最后是jsbin。
的monkeypatched版本答案 1 :(得分:29)
在@David Wick的回答中,我在不同浏览器上旋转后绘制图像以指示偏移量。
如果你不想修补或修改jquery.ui.draggable.js,这里是要修复的代码
$(document).ready(function () {
var recoupLeft, recoupTop;
$('#box').draggable({
start: function (event, ui) {
var left = parseInt($(this).css('left'),10);
left = isNaN(left) ? 0 : left;
var top = parseInt($(this).css('top'),10);
top = isNaN(top) ? 0 : top;
recoupLeft = left - ui.position.left;
recoupTop = top - ui.position.top;
},
drag: function (event, ui) {
ui.position.left += recoupLeft;
ui.position.top += recoupTop;
}
});
});
或者您可以看到demo
答案 2 :(得分:21)
David Wick对于上面的总体方向是对的,但是计算正确的坐标比这更为复杂。这是一个更准确的猴子补丁,基于MIT许可的Firebug代码,它可以在更复杂的DOM中运行:
取而代之的是:
//The element's absolute position on the page minus margins this.offset = this.positionAbs = this.element.offset();
用较少的hacky(一定要搞定整件事;你需要滚动):
//The element's absolute position on the page minus margins this.offset = this.positionAbs = getViewOffset(this.element[0]); function getViewOffset(node) { var x = 0, y = 0, win = node.ownerDocument.defaultView || window; if (node) addOffset(node); return { left: x, top: y }; function getStyle(node) { return node.currentStyle || // IE win.getComputedStyle(node, ''); } function addOffset(node) { var p = node.offsetParent, style, X, Y; x += parseInt(node.offsetLeft, 10) || 0; y += parseInt(node.offsetTop, 10) || 0; if (p) { x -= parseInt(p.scrollLeft, 10) || 0; y -= parseInt(p.scrollTop, 10) || 0; if (p.nodeType == 1) { var parentStyle = getStyle(p) , localName = p.localName , parent = node.parentNode; if (parentStyle.position != 'static') { x += parseInt(parentStyle.borderLeftWidth, 10) || 0; y += parseInt(parentStyle.borderTopWidth, 10) || 0; if (localName == 'TABLE') { x += parseInt(parentStyle.paddingLeft, 10) || 0; y += parseInt(parentStyle.paddingTop, 10) || 0; } else if (localName == 'BODY') { style = getStyle(node); x += parseInt(style.marginLeft, 10) || 0; y += parseInt(style.marginTop, 10) || 0; } } else if (localName == 'BODY') { x += parseInt(parentStyle.borderLeftWidth, 10) || 0; y += parseInt(parentStyle.borderTopWidth, 10) || 0; } while (p != parent) { x -= parseInt(parent.scrollLeft, 10) || 0; y -= parseInt(parent.scrollTop, 10) || 0; parent = parent.parentNode; } addOffset(p); } } else { if (node.localName == 'BODY') { style = getStyle(node); x += parseInt(style.borderLeftWidth, 10) || 0; y += parseInt(style.borderTopWidth, 10) || 0; var htmlStyle = getStyle(node.parentNode); x -= parseInt(htmlStyle.paddingLeft, 10) || 0; y -= parseInt(htmlStyle.paddingTop, 10) || 0; } if ((X = node.scrollLeft)) x += parseInt(X, 10) || 0; if ((Y = node.scrollTop)) y += parseInt(Y, 10) || 0; } } }
遗憾的是,DOM本身并未公开这些计算。
答案 3 :(得分:11)
@ecmanaut:很棒的解决方案。谢谢你的努力。为了帮助别人,我把你的解决方案变成了一个猴子补丁。将下面的代码复制到文件中。加载jquery-ui.js后包含文件如下:
<script src="javascripts/jquery/jquery.js"></script>
<script src="javascripts/jquery/jquery-ui.js"></script>
<!-- the file containing the monkey-patch to draggable -->
<script src="javascripts/jquery/patch_draggable.js"></script>
以下是要复制/粘贴到patch_draggable.js的代码:
function monkeyPatch_mouseStart() {
// don't really need this, but in case I did, I could store it and chain
var oldFn = $.ui.draggable.prototype._mouseStart ;
$.ui.draggable.prototype._mouseStart = function(event) {
var o = this.options;
function getViewOffset(node) {
var x = 0, y = 0, win = node.ownerDocument.defaultView || window;
if (node) addOffset(node);
return { left: x, top: y };
function getStyle(node) {
return node.currentStyle || // IE
win.getComputedStyle(node, '');
}
function addOffset(node) {
var p = node.offsetParent, style, X, Y;
x += parseInt(node.offsetLeft, 10) || 0;
y += parseInt(node.offsetTop, 10) || 0;
if (p) {
x -= parseInt(p.scrollLeft, 10) || 0;
y -= parseInt(p.scrollTop, 10) || 0;
if (p.nodeType == 1) {
var parentStyle = getStyle(p)
, localName = p.localName
, parent = node.parentNode;
if (parentStyle.position != 'static') {
x += parseInt(parentStyle.borderLeftWidth, 10) || 0;
y += parseInt(parentStyle.borderTopWidth, 10) || 0;
if (localName == 'TABLE') {
x += parseInt(parentStyle.paddingLeft, 10) || 0;
y += parseInt(parentStyle.paddingTop, 10) || 0;
}
else if (localName == 'BODY') {
style = getStyle(node);
x += parseInt(style.marginLeft, 10) || 0;
y += parseInt(style.marginTop, 10) || 0;
}
}
else if (localName == 'BODY') {
x += parseInt(parentStyle.borderLeftWidth, 10) || 0;
y += parseInt(parentStyle.borderTopWidth, 10) || 0;
}
while (p != parent) {
x -= parseInt(parent.scrollLeft, 10) || 0;
y -= parseInt(parent.scrollTop, 10) || 0;
parent = parent.parentNode;
}
addOffset(p);
}
}
else {
if (node.localName == 'BODY') {
style = getStyle(node);
x += parseInt(style.borderLeftWidth, 10) || 0;
y += parseInt(style.borderTopWidth, 10) || 0;
var htmlStyle = getStyle(node.parentNode);
x -= parseInt(htmlStyle.paddingLeft, 10) || 0;
y -= parseInt(htmlStyle.paddingTop, 10) || 0;
}
if ((X = node.scrollLeft)) x += parseInt(X, 10) || 0;
if ((Y = node.scrollTop)) y += parseInt(Y, 10) || 0;
}
}
}
//Create and append the visible helper
this.helper = this._createHelper(event);
//Cache the helper size
this._cacheHelperProportions();
//If ddmanager is used for droppables, set the global draggable
if($.ui.ddmanager)
$.ui.ddmanager.current = this;
/*
* - Position generation -
* This block generates everything position related - it's the core of draggables.
*/
//Cache the margins of the original element
this._cacheMargins();
//Store the helper's css position
this.cssPosition = this.helper.css("position");
this.scrollParent = this.helper.scrollParent();
//The element's absolute position on the page minus margins
this.offset = this.positionAbs = getViewOffset(this.element[0]);
this.offset = {
top: this.offset.top - this.margins.top,
left: this.offset.left - this.margins.left
};
$.extend(this.offset, {
click: { //Where the click happened, relative to the element
left: event.pageX - this.offset.left,
top: event.pageY - this.offset.top
},
parent: this._getParentOffset(),
relative: this._getRelativeOffset() //This is a relative to absolute position minus the actual position calculation - only used for relative positioned helper
});
//Generate the original position
this.originalPosition = this.position = this._generatePosition(event);
this.originalPageX = event.pageX;
this.originalPageY = event.pageY;
//Adjust the mouse offset relative to the helper if 'cursorAt' is supplied
(o.cursorAt && this._adjustOffsetFromHelper(o.cursorAt));
//Set a containment if given in the options
if(o.containment)
this._setContainment();
//Trigger event + callbacks
if(this._trigger("start", event) === false) {
this._clear();
return false;
}
//Recache the helper size
this._cacheHelperProportions();
//Prepare the droppable offsets
if ($.ui.ddmanager && !o.dropBehaviour)
$.ui.ddmanager.prepareOffsets(this, event);
this.helper.addClass("ui-draggable-dragging");
//JWL: Hier vindt de jump plaats
this._mouseDrag(event, true); //Execute the drag once - this causes the helper not to be visible before getting its correct position
//If the ddmanager is used for droppables, inform the manager that dragging has started (see #5003)
if ( $.ui.ddmanager ) $.ui.ddmanager.dragStart(this, event);
return true;
};
}
monkeyPatch_mouseStart();
答案 4 :(得分:5)
David Wick的回答非常有帮助......谢谢...... 在这里,我为可调整大小编写了相同的解决方法,因为它有同样的问题:
中搜索以下内容var o = this.options, iniPos = this.element.position(), el = this.element;
并替换为:
var o = this.options, iniPos = {top:this.element[0].offsetTop,left:this.element[0].offsetLeft}, el = this.element;
答案 5 :(得分:5)
我更喜欢这种解决方法,因为它保留了原始处理程序
它删除转换然后恢复它
$(document).ready(function(){
// backup original handler
var _mouseStart = $.ui.draggable.prototype._mouseStart;
$.ui.draggable.prototype._mouseStart = function(event) {
//remove the transform
var transform = this.element.css('transform');
this.element.css('transform', 'none');
// call original handler
var result = _mouseStart.call(this, event);
//restore the transform
this.element.css('transform', transform);
return result;
};
});
demo(从@Liao San-Kai jsbin开始)
答案 6 :(得分:2)
我使用了很多解决方案让拖动工作正常。但它仍然对一个掉落区域做出了错误的反应(就像没有旋转一样)。解决方案实际上是使用相对位置的父容器。
这为我节省了太多时间。
<div id="drawarea">
<div class="rect-container h">
<div class="rect"></div>
</div>
</div>
.rect-container {
position:relative;
}
这里的完整解决方案(它不是来自我): http://jsfiddle.net/Sp6qa/2/
我也研究了很多。就像这样,jQuery没有任何计划在未来改变当前的行为。所有提交的有关该主题的门票均已关闭。因此,首先要让父母容器处于相对位置。它就像一个魅力,应该是未来的。
答案 7 :(得分:1)
您必须将draggable元素的父容器设置为“position:relative”。