我几乎放弃了;（试试片段，管理让它只在中途工作＆＃39;（
我知道问题在于我如何处理监听器和event.targets。但我无法弄清楚出了什么问题;（
目标是确保所有＆＃34;库存＆＃34;类元素可以拖放复制。所有＆＃34;可拖动＆＃34;类元素可以拖放丢弃。
我设法通过＆＃34;双击＆＃34;来完成工作。基本上首先单击DragnClick函数创建draggable。然后点击并拖动 - 这样做。
但如何只需点击一下即可实现？如何将拖动事件传递给Draggable？
//var morphUIon = false;
var morphTarget = null;
var drag = null;
var canvas = {};
var inventory = {};
canvas = document.getElementById("canvas");
inventory = document.getElementById("inventory");
window.onload = function() {
for (i=0;i<6;i++) {
document.getElementsByClassName("inventory")[i].addEventListener("mousedown", DragnCopy);
}
}
function DragnCopy(e) {
e.preventDefault();
var copy = e.target.cloneNode(true);
copy.classList.remove("inventory");
copy.classList.add("draggable");
canvas.appendChild(copy);
drag = new Draggable(copy);
}
function Draggable(elem, event) {
this.target = elem
this.clickPoint = this.target.ownerSVGElement.createSVGPoint()
this.lastMove = this.target.ownerSVGElement.createSVGPoint()
this.currentMove = this.target.ownerSVGElement.createSVGPoint()
this.dpath = this.target.getAttribute("d")
this.subclass = this.target.getAttribute("subclass")
this.target.pathPoints = parsePathToPoints(this.dpath, this.subclass)
this.target.addEventListener("dblclick", this)
this.target.addEventListener("mousedown", this)
this.handleEvent = function(evt) {
switch (evt.type) {
case 'mousedown':
evt.preventDefault()
this.clickPoint = globalToLocalCoords(evt.clientX, evt.clientY)
this.target.classList.add("dragged")
this.target.ownerSVGElement.addEventListener("mousemove", this.move)
this.target.ownerSVGElement.addEventListener("mouseup", this.endMove)
break;
case 'dblclick':
evt.preventDefault()
if (morphTarget) {
if (morphTarget!=this.target) {
morphTarget.classList.remove("morphed")
this.target.classList.add("morphed")
morphTarget = this.target;
} else {
return;
}
} else {
morphTarget = this.target
this.target.classList.add("morphed")
}
//Morph(this.target);
break;
}
}
this.move = function(evt) {
evt.preventDefault()
var p = globalToLocalCoords(evt.clientX, evt.clientY)
this.currentMove.x = this.lastMove.x + (p.x - this.clickPoint.x)
this.currentMove.y = this.lastMove.y + (p.y - this.clickPoint.y)
this.target.setAttribute("transform", "translate(" + this.currentMove.x + "," + this.currentMove.y + ")")
}.bind(this)
this.endMove = function(evt) {
this.lastMove.x = this.currentMove.x
this.lastMove.y = this.currentMove.y
this.target.classList.remove("dragged")
//this.target.setAttribute("pointer-events", "all")
this.target.ownerSVGElement.removeEventListener("mousemove", this.move)
this.target.ownerSVGElement.removeEventListener("mouseup", this.endMove)
}.bind(this)
function globalToLocalCoords(x, y) {
var p = elem.ownerSVGElement.createSVGPoint()
var m = elem.parentNode.getScreenCTM()
p.x = x
p.y = y
return p.matrixTransform(m.inverse())
}
}
function Morph(elem) {
console.log(elem);
}
function parsePathToPoints(d, sub) {
var darray = [];
var pathPoints = {};
switch (sub) {
case 'circle':
darray = d.replace(/M|A|Z/g, "").replace(/,/g, " ").split(" ").map(Number);
pathPoints.p0 = {"x": darray[0], "y": darray[1]};
pathPoints.p1 = {"x": darray[0]+darray[2], "y": darray[1]-darray[3]};
pathPoints.p2 = {"x": darray[7], "y": darray[8]};
pathPoints.p3 = {"x": darray[0]+darray[2], "y": darray[1]+darray[3]};
pathPoints.p4 = {"x": darray[2], "y": darray[3]}; // = radius used in the circle path
return pathPoints;
break;
case 'curve4':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length-2; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
};
return pathPoints;
break;
case 'curve3':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number)
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
case 'curve2':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
case 'curve1':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
case 'cubic':
darray = d.replace(/M|C/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
}
}
function pointsToPath(pathPoints, pathSubclass) {
console.log("joining "+pathPoints+"for a "+pathSubclass);
}html, body {
margin: 0;
padding: 0;
border: 0;
overflow:hidden;
background-color: #fff;
}
svg {
position: fixed;
top:0%;
left:0%;
width:100%;
height:100%;
}
.inventory {
fill: transparent;
stroke: black;
cursor: move;
}
.draggable {
fill: transparent;
stroke: blue;
cursor: move;
}
.dragged {
fill: transparent;
stroke: green;
cursor: move;
}
.morphed {
fill: transparent;
stroke: red;
cursor: move;
}
.lines {
stroke: green;
stroke-dasharray: 8,5;
stroke-width: 1;
opacity: 0.5;
}
path
{
stroke-width: 3;
stroke: #000;
stroke-linecap: round;
}
path.fill
{
fill: #3ff;
}
#canvasBackground {
fill: lightgrey;
}
#inventoryBackground {
fill: grey;
}
#morphUIrect {
fill: none;
stroke: blue;
stroke-dasharray: 10,5;
opacity: 0.1;
}
.label {
fill: grey;
}<body>
<svg id="svg"
height="480"
width="480"
viewbox="0 0 480 580"
preserveAspectRatio="xMinYMax meet"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
>
<rect id="canvasBackground" width="480" height="480" x="0" y="0" pointer-events="all"/>
<rect id="inventoryBackground" width="480" height="100" x="0" y="480" pointer-events="all"/>
<g id="inventory">
<path class="inventory" subclass="circle" d="M30,530 A35,35 1 1,1 100,530 A35,35 1 1,1 30,530" />
<path class="inventory" subclass="curve4" d="M125,500 Q155,490 185,500 Q195,530 185,560 Q155,570 125,560 Q115,530 125,500" />
<path class="inventory" subclass="curve3" d="M245,495 Q275,520 280,560 Q245,570 210,560 Q215,520 245,495" />
<path class="inventory" subclass="curve2" d="M305,515 Q345,475 385,515 Q345,555 305,515"/>
<path class="inventory" subclass="curve1" d="M305,550 Q345,580 385,550"/>
<path class="inventory" subclass="cubic" d="M420,495 C470,530 380,530 425,565"/>
</g>
<g id="canvas">
</g>
<g id="morphUI">
<rect id="morphUIrect" visibility = "visible" x="0" y="0" width="0" height="0"></rect>
<line id="l0" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l1" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l2" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l3" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l4" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l5" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l6" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l7" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<circle id="0" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="1" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="2" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="3" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="4" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="5" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="6" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="7" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="8" visibility = "hidden" class="control" cx="0" cy="0" r="10" _x="0" _y="0"/>
</g>
</svg>
</body>
答案 0 :(得分：0)
你有两个独立的mousedown事件处理程序。第二个（开始拖动）仅在克隆库存项目后添加。
如果您希望在单击库存时启动拖动，则需要将“开始拖动”代码移动到第一个mousedown处理程序。
在下面的例子中，我刚将它移动到一个名为'startMove（）'的函数，我从第一个mousedown处理程序调用它。
//var morphUIon = false;
var morphTarget = null;
var drag = null;
var canvas = {};
var inventory = {};
canvas = document.getElementById("canvas");
inventory = document.getElementById("inventory");
window.onload = function() {
for (i=0;i<6;i++) {
document.getElementsByClassName("inventory")[i].addEventListener("mousedown", DragnCopy);
}
}
function DragnCopy(e) {
e.preventDefault();
var copy = e.target.cloneNode(true);
copy.classList.remove("inventory");
copy.classList.add("draggable");
canvas.appendChild(copy);
drag = new Draggable(copy);
drag.startMove(e);
}
function Draggable(elem, event) {
this.target = elem
this.clickPoint = this.target.ownerSVGElement.createSVGPoint()
this.lastMove = this.target.ownerSVGElement.createSVGPoint()
this.currentMove = this.target.ownerSVGElement.createSVGPoint()
this.dpath = this.target.getAttribute("d")
this.subclass = this.target.getAttribute("subclass")
this.target.pathPoints = parsePathToPoints(this.dpath, this.subclass)
this.target.addEventListener("dblclick", this)
this.target.addEventListener("mousedown", this)
this.handleEvent = function(evt) {
switch (evt.type) {
case 'dblclick':
evt.preventDefault()
if (morphTarget) {
if (morphTarget!=this.target) {
morphTarget.classList.remove("morphed")
this.target.classList.add("morphed")
morphTarget = this.target;
} else {
return;
}
} else {
morphTarget = this.target
this.target.classList.add("morphed")
}
//Morph(this.target);
break;
}
}
this.startMove = function(evt) {
this.clickPoint = globalToLocalCoords(evt.clientX, evt.clientY)
this.target.classList.add("dragged")
this.target.ownerSVGElement.addEventListener("mousemove", this.move)
this.target.ownerSVGElement.addEventListener("mouseup", this.endMove)
}
this.move = function(evt) {
evt.preventDefault()
var p = globalToLocalCoords(evt.clientX, evt.clientY)
this.currentMove.x = this.lastMove.x + (p.x - this.clickPoint.x)
this.currentMove.y = this.lastMove.y + (p.y - this.clickPoint.y)
this.target.setAttribute("transform", "translate(" + this.currentMove.x + "," + this.currentMove.y + ")")
}.bind(this)
this.endMove = function(evt) {
this.lastMove.x = this.currentMove.x
this.lastMove.y = this.currentMove.y
this.target.classList.remove("dragged")
//this.target.setAttribute("pointer-events", "all")
this.target.ownerSVGElement.removeEventListener("mousemove", this.move)
this.target.ownerSVGElement.removeEventListener("mouseup", this.endMove)
}.bind(this)
function globalToLocalCoords(x, y) {
var p = elem.ownerSVGElement.createSVGPoint()
var m = elem.parentNode.getScreenCTM()
p.x = x
p.y = y
return p.matrixTransform(m.inverse())
}
}
function Morph(elem) {
console.log(elem);
}
function parsePathToPoints(d, sub) {
var darray = [];
var pathPoints = {};
switch (sub) {
case 'circle':
darray = d.replace(/M|A|Z/g, "").replace(/,/g, " ").split(" ").map(Number);
pathPoints.p0 = {"x": darray[0], "y": darray[1]};
pathPoints.p1 = {"x": darray[0]+darray[2], "y": darray[1]-darray[3]};
pathPoints.p2 = {"x": darray[7], "y": darray[8]};
pathPoints.p3 = {"x": darray[0]+darray[2], "y": darray[1]+darray[3]};
pathPoints.p4 = {"x": darray[2], "y": darray[3]}; // = radius used in the circle path
return pathPoints;
break;
case 'curve4':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length-2; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
};
return pathPoints;
break;
case 'curve3':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number)
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
case 'curve2':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
case 'curve1':
darray = d.replace(/M|Q/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
case 'cubic':
darray = d.replace(/M|C/g, "").replace(/,/g, " ").split(" ").map(Number);
for (i=0, j=1, o=9; i<darray.length; i+=2, j+=2, o++) {
pathPoints["p"+(o-9)] = {"x": darray[i], "y": darray[j]};
}
return pathPoints;
break;
}
}
function pointsToPath(pathPoints, pathSubclass) {
console.log("joining "+pathPoints+"for a "+pathSubclass);
}html, body {
margin: 0;
padding: 0;
border: 0;
overflow:hidden;
background-color: #fff;
}
svg {
position: fixed;
top:0%;
left:0%;
width:100%;
height:100%;
}
.inventory {
fill: transparent;
stroke: black;
cursor: move;
}
.draggable {
fill: transparent;
stroke: blue;
cursor: move;
}
.dragged {
fill: transparent;
stroke: green;
cursor: move;
}
.morphed {
fill: transparent;
stroke: red;
cursor: move;
}
.lines {
stroke: green;
stroke-dasharray: 8,5;
stroke-width: 1;
opacity: 0.5;
}
path
{
stroke-width: 3;
stroke: #000;
stroke-linecap: round;
}
path.fill
{
fill: #3ff;
}
#canvasBackground {
fill: lightgrey;
}
#inventoryBackground {
fill: grey;
}
#morphUIrect {
fill: none;
stroke: blue;
stroke-dasharray: 10,5;
opacity: 0.1;
}
.label {
fill: grey;
}<body>
<svg id="svg"
height="480"
width="480"
viewbox="0 0 480 580"
preserveAspectRatio="xMinYMax meet"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
>
<rect id="canvasBackground" width="480" height="480" x="0" y="0" pointer-events="all"/>
<rect id="inventoryBackground" width="480" height="100" x="0" y="480" pointer-events="all"/>
<g id="inventory">
<path class="inventory" subclass="circle" d="M30,530 A35,35 1 1,1 100,530 A35,35 1 1,1 30,530" />
<path class="inventory" subclass="curve4" d="M125,500 Q155,490 185,500 Q195,530 185,560 Q155,570 125,560 Q115,530 125,500" />
<path class="inventory" subclass="curve3" d="M245,495 Q275,520 280,560 Q245,570 210,560 Q215,520 245,495" />
<path class="inventory" subclass="curve2" d="M305,515 Q345,475 385,515 Q345,555 305,515"/>
<path class="inventory" subclass="curve1" d="M305,550 Q345,580 385,550"/>
<path class="inventory" subclass="cubic" d="M420,495 C470,530 380,530 425,565"/>
</g>
<g id="canvas">
</g>
<g id="morphUI">
<rect id="morphUIrect" visibility = "visible" x="0" y="0" width="0" height="0"></rect>
<line id="l0" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l1" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l2" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l3" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l4" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l5" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l6" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<line id="l7" visibility = "hidden" class="lines" x1="0" y1="0" x2="0" y2="0"/>
<circle id="0" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="1" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="2" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="3" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="4" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="5" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="6" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="7" visibility = "hidden" class="control" cx="0" cy="0" r="8"/>
<circle id="8" visibility = "hidden" class="control" cx="0" cy="0" r="10" _x="0" _y="0"/>
</g>
</svg>
</body>