我正在尝试使用SVG构建座位预订网络应用程序。想象一下,我在svg中创建了一个矩形,代表一个空位。我想允许用户在“rect”上放一个html“image”元素来保留座位。
但是,我无法使用droppable来处理SVG elemnet。任何人都知道为什么会这样?这是代码:
$('#target').svg();
var svg = $("#target").svg('get');
svg.rect(20, 10, 100, 50, 10, 10, { fill: '#666', class: "droppable" });
$('rect')
.droppable({
accept: '.product',
tolerance: 'touch',
drop: function (event, ui) {
alert('df');
}
}
答案 0 :(得分:8)
我查看了jQuery-ui源代码,并找出了为什么它不能使用SVG。 jQuery认为它们的宽度和高度为0px,因此交叉测试失败。
我将$ .ui.intersect包装好并在将参数传递给原始函数之前设置正确的大小信息。可能有更多比例的对象需要修复,但我在这里做的两个对象足以解决我的问题:
$.ui.intersect_o = $.ui.intersect;
$.ui.intersect = function(draggable, droppable, toleranceMode) {
//Fix helper
if (draggable.helperProportions && draggable.helperProportions.width === 0 && draggable.helperProportions.height === 0) {
draggable.helperProportionsBBox = draggable.helperProportionsBBox || $(draggable.element).get(0).getBBox();
draggable.helperProportions = draggable.helperProportionsBBox;
}
//Fix droppable
if (droppable.proportions && droppable.proportions.width === 0 && droppable.proportions.height === 0) {
droppable.proportionsBBox = droppable.proportionsBBox || $(droppable.element).get(0).getBBox();
droppable.proportions = droppable.proportionsBBox;
}
return $.ui.intersect_o(draggable, droppable, toleranceMode);
};
答案 1 :(得分:3)
使用jQuery UI 1.11.4我必须将Eddie的解决方案更改为以下内容,因为draggable.proportions现在是一个函数:
$.ui.intersect_o = $.ui.intersect;
$.ui.intersect = function (draggable, droppable, toleranceMode, event) {
//Fix helper
if (draggable.helperProportions && draggable.helperProportions.width === 0 && draggable.helperProportions.height === 0) {
draggable.helperProportionsBBox = draggable.helperProportionsBBox || $(draggable.element).get(0).getBBox();
draggable.helperProportions = draggable.helperProportionsBBox;
}
if (droppable.proportions && !droppable.proportions().width && !droppable.proportions().height)
if (typeof $(droppable.element).get(0).getBBox === "function") {
droppable.proportionsBBox = droppable.proportionsBBox || $(droppable.element).get(0).getBBox();
droppable.proportions = function () {
return droppable.proportionsBBox;
};
}
return $.ui.intersect_o(draggable, droppable, toleranceMode, event);
};
答案 2 :(得分:1)
如果您想限制 svg元素的下降,只能点击可见内容(例如多边形),您可能希望使用Peter Baumann的建议:
$.ui.intersect_o = $.ui.intersect;
$.ui.intersect = function (draggable, droppable, toleranceMode, event) {
//Fix helper
if (draggable.helperProportions && draggable.helperProportions.width === 0 && draggable.helperProportions.height === 0) {
draggable.helperProportionsBBox = draggable.helperProportionsBBox || $(draggable.element).get(0).getBBox();
draggable.helperProportions = draggable.helperProportionsBBox;
}
if (droppable.proportions && !droppable.proportions().width && !droppable.proportions().height)
if (typeof $(droppable.element).get(0).getBBox === "function") {
droppable.proportionsBBox = droppable.proportionsBBox || $(droppable.element).get(0).getBBox();
droppable.proportions = function () {
return droppable.proportionsBBox;
};
}
var intersect = $.ui.intersect_o(draggable, droppable, toleranceMode, event);
if (intersect) {
var dropTarget = $(droppable.element).get(0);
if (dropTarget.ownerSVGElement && (typeof (dropTarget.isPointInFill) === 'function') && (typeof (dropTarget.isPointInStroke) === 'function')) {
var x = ( draggable.positionAbs || draggable.position.absolute ).left + draggable.margins.left + draggable.helperProportions.width / 2,
y = ( draggable.positionAbs || draggable.position.absolute ).top + draggable.margins.top + draggable.helperProportions.height / 2,
p = dropTarget.ownerSVGElement.createSVGPoint();
p.x = x;
p.y = y;
p = p.matrixTransform(dropTarget.getScreenCTM().inverse());
if(!(dropTarget.isPointInFill(p) || dropTarget.isPointInStroke(p)))
intersect = false;
}
}
return intersect;
};
答案 3 :(得分:0)
如果有人想到同样的问题,droppable在jquery SVG中不起作用。所以最后,我做了以下创建我自己的droppable事件:
在draggable中,设置当前拖动的目标已拖动到draggedObj,
在mouse up事件中,检查draggedObj是否为null,如果它不为null,则根据当前位置删除该项。 (如果您在检测当前位置时需要帮助,请告诉我们)