有人可以帮助修复我的拖动和复制代码吗？

Question

我几乎要放弃了；（试试这个片段，设法让它只工作了一半'（

我知道问题在于我如何处理听众和 event.targets。但是我不知道哪里出了问题；(

目标是确保所有 "inventory" class 元素都可以拖动和复制。所有 "draggable" class 元素都可以拖放。

我设法通过 "double click" 使事情正常进行。基本上先点击DragnClick函数创建可拖动的。然后下一步单击并拖动 - 就可以了。

但是如何一键制作呢？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>

Answer 1

您有两个单独的 mousedown 事件处理程序。第二个（启动拖动）仅在您克隆库存项目后添加。

如果您希望在单击物品栏时开始拖动，则需要将 "start dragging" 代码移动到第一个 mousedown 处理程序。

在下面的示例中，我刚刚将其移至一个名为 'startMove()' 的函数，我从第一个 mousedown 处理程序调用了该函数。

//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>

有人可以帮助修复我的拖动和复制代码吗？

Can someone help fix my drag & copy code?

javascript

svg

copy

drag