所以我想设置并获取我创建的SVG元素的ID。当我尝试通过使用document.getElementByID()获取SVG元素时,无法做到这一点。我的主要目标是最终实现一种方法,使我可以看到哪个元素被拖动到另一个元素的顶部,以便可以相应地更改形状的颜色。谢谢您的帮助。
const SVG_NS = 'http://www.w3.org/2000/svg';
let Y = 1450;
// create bottom left row
for(let i = 1; i< 12; i++){
let x = 21 + i*49;
drawCircle({cx:x, cy:Y,r:20},circle_seats,i);
drawText({props:{x:x, y:Y},txtContent:i}, circle_seats);
}
// create bottom right row
for(i = 12; i < 23; i++) {
let x = 21 + i*49;
drawCircle({cx:(x+49*5), cy:Y,r:20},circle_seats,i);
drawText({props:{x:(x+49*5), y:Y},txtContent:i}, circle_seats);
}
Y = 1400;
//create top left row
for(let i = 1,j = 23; i< 15; i++,j++){
let x = 21 + i*49;
drawCircle({cx:x, cy:Y,r:20},circle_seats,i);
drawText({props:{x:x, y:Y},txtContent:j}, circle_seats);
}
//create top right row
for(i = 12,j = 37; i < 27; i++,j++) {
let x = 21 + i*49;
drawCircle({cx:(x+49*5), cy:Y,r:20},circle_seats,i);
drawText({props:{x:(x+49*5), y:Y},txtContent:j}, circle_seats);
}
function drawCircle(o, parent, a) {
var circle = document.createElementNS(SVG_NS, 'circle');
for (var name in o) {
if (o.hasOwnProperty(name)) {
circle.setAttributeNS(null, name, o[name]);
circle.id = "seat"+ a;
}
}
parent.appendChild(circle);
return circle;
}
function drawText(o, parent) {
var text = document.createElementNS(SVG_NS, "text");
for (var name in o.props) {
if (o.props.hasOwnProperty(name)) {
text.setAttributeNS(null, name, o.props[name]);
}
}
text.textContent = o.txtContent;
parent.appendChild(text);
return text;
}
//rectangle plate functions
function drawText_plate(o, parent) {
var text = document.createElementNS(SVG_NS, "text");
for (var name in o.props) {
if (o.props.hasOwnProperty(name)) {
text.setAttributeNS(null, name, o.props[name]);
}
}
text.textContent = o.txtContent;
text.style.fontSize = "17px";
parent.appendChild(text);
return text;
}
var svgns = "http://www.w3.org/2000/svg";
function drawRectangle(o, parent, a) {
var rectangle = document.createElementNS(svgns, 'rect');
for (var name in o) {
if (o.hasOwnProperty(name)) {
rectangle.setAttributeNS(null, name, o[name]);
rectangle.setAttribute("id", "seat"+ a);
}
}
parent.appendChild(rectangle);
return rectangle;
}
Y = 100;
let X = 25;
drawRectangle({x:X, y:Y,width:100,height:50},name_plates,i);
drawText_plate({props:{x:X+90, y:Y+25},txtContent:1}, name_plates);
drawCircle({cx:X+10,cy:Y+25,r:5},name_plates,1);
for(let i = 2; i< 51; i++){
X = X + 100 + 10
if(i % 13 == 0) {
X = 25;
Y = Y + 55;
}
drawRectangle({x:X, y:Y,width:100,height:50},name_plates,i);
drawText_plate({props:{x:X+90, y:Y+25},txtContent:i}, name_plates);
drawCircle({cx:X+10,cy:Y+25,r:5},name_plates,i);
}
//NameTag Functions
function drawText_name_tag(o, parent) {
var text = document.createElementNS(SVG_NS, "text");
for (var name in o.props) {
if (o.props.hasOwnProperty(name)) {
text.setAttributeNS(null, name, o.props[name]);
}
}
text.textContent = o.txtContent;
text.style.fontSize = "10px";
parent.appendChild(text);
return text;
}
//create name tags
Y = 400;
X = 25;
drawRectangle({x:X, y:Y,width:100,height:50},name_tags,i);
drawText_name_tag({props:{x:X+50, y:Y+25},txtContent:"BLANK"}, name_tags);
for(let i = 2; i< 2; i++){
X = X + 100 + 10
if(i % 13 == 0) {
X = 25;
Y = Y + 55;
}
drawRectangle({x:X, y:Y,width:100,height:50},name_tags,i);
drawText_name_tag({props:{x:X+50, y:Y+25},txtContent:"BLANK"}, name_tags);
}
function change_name(event) {
var name = prompt("Enter a New Name (Max 20 characters):");
while(name.length > 20) {
name = prompt("Enter a New Name (Previous Over 20 Characters)");
}
if (name != null && name != "") {
event.target.textContent = name;
}
}
text {
fill: black;
font-family: Verdana;
font-size: 28px;
stroke: black;
dominant-baseline:middle;
text-anchor:middle;
}
circle {
fill: url(#gradGreen);
stroke: black;
}
rect {
fill: url(#gradGrey);
stroke: black;
}
<svg id="svg" height="1500" width="1500">
<defs>
<lineargradient id="gradGreen" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(152, 251, 152);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(0, 128, 0);stop-opacity:1"></stop>
</lineargradient>
<lineargradient id="gradYellow" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(255, 140, 0);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(218, 165, 32);stop-opacity:1"></stop>
</lineargradient>
<lineargradient id="gradRed" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(255, 0, 0);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(178, 34, 34);stop-opacity:1"></stop>
</lineargradient>
<lineargradient id="gradGrey" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(220, 220, 220);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(105, 105, 105);stop-opacity:1"></stop>
</lineargradient>
</defs>
<g class="circle_seat" id="circle_seats">
</g>
<g class ="name_plate" id= "name_plates">
</g>
<g class="name_tag" id="name_tags" ondblclick="change_name(event)">
</g>
</svg>
答案 0 :(得分:1)
要绘制圆,您正在使用此功能:
function drawCircle(o, parent) {
var circle = document.createElementNS(SVG_NS, 'circle');
for (var name in o) {
if (o.hasOwnProperty(name)) {
circle.setAttributeNS(null, name, o[name]);
//circle.id = "seat"+ a;
}
}
parent.appendChild(circle);
return circle;
}
您可能会看到,我注释掉了一行代码,即您尝试设置ID的那一行。您不需要此行。创建新圈子时,您可以执行以下操作:
drawCircle({cx:(x+49*5),
cy:Y,
r:20,
id:"seat"+i},circle_seats);
现在已经设置了您的ID,就可以使用document.getElementByID()
。
这是您的代码,但是我删除了一些您不需要的功能。由于您无法重复id
,因此我通过在左上角tr
和左下角添加bl
而不是seat
来命名它们。
这很重要:演示文稿属性的特异性很低,并且被CSS声明覆盖。要更改在CSS中设置的填充,您需要添加CSS规则:
document.getElementById("bl1").setAttribute("style", "fill:red");
const SVG_NS = "http://www.w3.org/2000/svg";
let Y = 1450;
// create bottom left row
for (let i = 1; i < 12; i++) {
let x = 21 + i * 49;
drawCircle({ cx: x, cy: Y, r: 20, id: "bl" + i }, circle_seats);
drawText({ props: { x: x, y: Y }, txtContent: i }, circle_seats);
}
// create bottom right row
for (i = 12; i < 23; i++) {
let x = 21 + i * 49;
drawCircle({ cx: x + 49 * 5, cy: Y, r: 20, id: "br" + i }, circle_seats);
drawText({ props: { x: x + 49 * 5, y: Y }, txtContent: i }, circle_seats);
}
Y = 1400;
//create top left row
for (let i = 1, j = 23; i < 15; i++, j++) {
let x = 21 + i * 49;
drawCircle({ cx: x, cy: Y, r: 20, id: "tl" + i }, circle_seats);
drawText({ props: { x: x, y: Y }, txtContent: j }, circle_seats);
}
//create top right row
for (i = 12, j = 37; i < 27; i++, j++) {
let x = 21 + i * 49;
drawCircle({ cx: x + 49 * 5, cy: Y, r: 20, id: "tr" + i }, circle_seats);
drawText({ props: { x: x + 49 * 5, y: Y }, txtContent: j }, circle_seats);
}
function drawCircle(o, parent) {
var circle = document.createElementNS(SVG_NS, "circle");
for (var name in o) {
if (o.hasOwnProperty(name)) {
circle.setAttributeNS(null, name, o[name]);
//circle.id = "seat"+ a;
}
}
parent.appendChild(circle);
return circle;
}
function drawText(o, parent) {
var text = document.createElementNS(SVG_NS, "text");
for (var name in o.props) {
if (o.props.hasOwnProperty(name)) {
text.setAttributeNS(null, name, o.props[name]);
}
}
text.textContent = o.txtContent;
parent.appendChild(text);
return text;
}
function drawRectangle(o, parent) {
var rectangle = document.createElementNS(SVG_NS, "rect");
for (var name in o) {
if (o.hasOwnProperty(name)) {
rectangle.setAttributeNS(null, name, o[name]);
//rectangle.setAttribute("id", "seat"+ a);
}
}
parent.appendChild(rectangle);
return rectangle;
}
Y = 100;
let X = 25;
drawRectangle({ x: X, y: Y, width: 100, height: 50 }, name_plates, 1);
drawText({ props: { x: X + 90, y: Y + 25 }, txtContent: 1 }, name_plates);
drawCircle({ cx: X + 10, cy: Y + 25, r: 5 }, name_plates, 1);
for (let i = 2; i < 51; i++) {
X = X + 100 + 10;
if (i % 13 == 0) {
X = 25;
Y = Y + 55;
}
drawRectangle({ x: X, y: Y, width: 100, height: 50 }, name_plates, i);
drawText({ props: { x: X + 90, y: Y + 25 }, txtContent: i }, name_plates);
drawCircle({ cx: X + 10, cy: Y + 25, r: 5 }, name_plates, i);
}
//create name tags
Y = 400;
X = 25;
drawRectangle({ x: X, y: Y, width: 100, height: 50 }, name_tags);
drawText(
{ props: { x: X + 50, y: Y + 25, class: "blank" }, txtContent: "BLANK" },
name_tags
);
document.getElementById("bl1").setAttribute("style", "fill:red");
function change_name(event) {
var name = prompt("Enter a New Name (Max 20 characters):");
while (name.length > 20) {
name = prompt("Enter a New Name (Previous Over 20 Characters)");
}
if (name != null && name != "") {
event.target.textContent = name;
}
}
text {
fill: black;
font-family: Verdana;
font-size: 28px;
stroke: black;
dominant-baseline:middle;
text-anchor:middle;
}
#name_plates text{font-size:17px}
text.blank{font-size:10px}
circle {
fill: url(#gradGreen);
stroke: black;
}
rect {
fill: url(#gradGrey);
stroke: black;
}
<svg id="svg" viewBox="0 0 1500 1500">
<defs>
<lineargradient id="gradGreen" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(152, 251, 152);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(0, 128, 0);stop-opacity:1"></stop>
</lineargradient>
<lineargradient id="gradYellow" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(255, 140, 0);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(218, 165, 32);stop-opacity:1"></stop>
</lineargradient>
<lineargradient id="gradRed" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(255, 0, 0);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(178, 34, 34);stop-opacity:1"></stop>
</lineargradient>
<lineargradient id="gradGrey" x1="0%" x2="100%" y1="0%" y2="0%">
<stop offset="0%" style="stop-color:rgb(220, 220, 220);stop-opacity:1"></stop>
<stop offset="100%" style="stop-color:rgb(105, 105, 105);stop-opacity:1"></stop>
</lineargradient>
</defs>
<g class="circle_seat" id="circle_seats">
</g>
<g class ="name_plate" id= "name_plates">
</g>
<g class="name_tag" id="name_tags" onclick="change_name(event)">
</g>
</svg>