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用jquery动态获取A001节点的坐标,C001节点的坐标,坐标值看起来是对的,但是实际上svg的line线后,显示在页面上的位置不对?实际上我要的是A001连接C001的点,但线感觉上平移了。
获取到的起点终点坐标为:
startX:440
startY:175
endX:301.421875
endY:255
startLeft:440
startTop:225
endLeft:401.421875
endTop:305
动态添加的line为:
<line id="line0" xmlns="http://www.w3.org/2000/svg" stroke="#000" stroke-width="2" marker-end="url(#arrow)" stroke-dasharray="10,10" x1="440" y1="225" x2="401.421875" y2="305"></line>
以下为获取画line的方法:
function addLine(index, startId, endId) {
//获取起始节点和终止节点的连线坐标
var startX = $(startId).offset().left;
var startY = $(startId).offset().top;
var startLeft = 0;
var startTop = 0;
var endX = $(endId).offset().left;
var endY = $(endId).offset().top;
var endLeft = 0;
var endTop = 0;
//下述考虑起始点和终止点不在同一水平线上的坐标
if (startY != endY) {
//如果起始点在终止点左边,则起始点需要left+width,top+ 1/2 height;终止点left,top+ 1/2 height
if (startX < endX) {
startLeft = startX + $(startId).width();
startTop = startY + $(startId).height() / 2;
endLeft = endX;
endTop = endY + $(endId).height() / 2;
}
//如果起始点在终止点右边,则起始点需要left,top+1/2 height;终止点left+width,top + 1/2 height
if (startX > endX) {
startLeft = startX;
startTop = startY + $(startId).height() / 2;
endLeft = endX+$(endId).width();
endTop = endY + $(endId).height() / 2;
}
//如果起始点跟终止点在同一条垂直线上,则起始点left+1/2width,top+height;终止点left+1/2width,top
if (startX == endX) {
startLeft = startX + $(startId).width() / 2;
startTop = startY + $(startId).height();
endLeft = endX + $(endId).width() / 2;
endTop = endY;
}
}
//下述考虑起始点和终止点在同一水平线上的坐标
else{
//如果起始点在终止点左边,则起始点需要left+width;终止点left
if (startX < endX) {
startLeft = startX + $(startId).width();
startTop = startY + $(startId).height() / 2;
endLeft = endX;
endTop = endY + $(endId).height() / 2;
}
//如果起始点在终止点右边,则起始点需要left;终止点left+width
if (startX > endX) {
startLeft = startX;
startTop = startY + $(startId).height() / 2;
endLeft = endX+$(endId).width();
endTop = endY + $(endId).height() / 2;
}
//起始点和终止点重合了,不需要画线
if (startX == endX) {
}
}
var line = "<line" + " id=line" + index + " xmlns='http://www.w3.org/2000/svg' stroke='#000' stroke-width='2' marker-end='url(#arrow)' stroke-dasharray='10,10'></line>";
console.log("startX:" + startX);
console.log("startY:" +startY);
console.log("endX:" + endX);
console.log("endY:" + endY);
console.log("startLeft:" + startLeft);
console.log("startTop:" + startTop);
console.log("endLeft:" + endLeft);
console.log("endTop:" + endTop);
var svg = d3.select('#wrap')
$(line).appendTo($("#wrap"));
$('#line' + index).attr({ x1: startLeft, y1: startTop, x2: endLeft, y2: endTop });
svg.html(svg.html());//需要重写父元素,否则html添加了,但是页面不显示
console.log(svg.html());
}
$("#test").on("click", function () {
addLine(0, "#A001", "#C002");
})
知道应该怎么解决吗?
svg默认应该是relative的,我把它的top设为0,left也设为0就可以了。