VML绘图板②脚本--VMLgraph.js、XMLtool.js

答案：
						

                        脚本
*************
* VMLgraph.js
*************
var xo=0;
var yo=0;
var ox=80;
var oy=20;
var dx=0;
var dy=0;
var drawKey = false;
var itemID = 0;
var ShapeItemNum = 0;
var ShapeItemX = 0;
var ShapeItemY = 0;
var CurveItemNum = 0;
var NodeDelete = false;
var ToolBarNum = 2; // 预置的工具编号
var gradientX = -1;

function cursor(k) {
  xo = event.clientX - ox;
  yo = event.clientY - oy;
  if(k && xo>=0 && yo>=0)
    oxy.innerHTML = xo+","+yo;
  else
    oxy.innerHTML = "";
  if(drawKey) {
    paint();
    view.innerHTML = tree(canvas.documentElement,0);
  }
}

function setOverColor(v) {
  if(! NodeDelete) return;
  v.myColor = v.strokecolor;
  if(v.strokecolor == "red")
    v.strokecolor='#000000';
  else
    v.strokecolor='#ff0000';
}
function setOutColor(v) {
  if(! NodeDelete) return;
  v.strokecolor = v.myColor;
  view.innerHTML = tree(canvas.documentElement,0);
}
function deleteNode(v) {
  if(! NodeDelete) return;
  var id = v.id;
  for(i=0;i<canvas.selectNodes("/*//*").length;i++) {
    var node = canvas.selectNodes("/*//*")[i];
    if(node.getAttribute("id") == id) {
      canvas.documentElement.childNodes[0].removeChild(node);
      view.innerHTML = tree(canvas.documentElement,0);
      return;
    }
  }
}

function setElement(node) {
  node.setAttribute("id") = itemID;
  node.setAttribute("myColor") = "#"; 
  node.setAttribute("onMouseOver") = "setOverColor(this)";
  node.setAttribute("onMouseOut") = "setOutColor(this)";
  node.setAttribute("onClick") = "deleteNode(this)";

  var subobjField = canvas.createElement("v:stroke");
  subobjField.setAttribute("color") = color1.fillcolor;
  subobjField.setAttribute("dashstyle") = dashstyle.dashstyle;
  node.appendChild(subobjField);
  if(textbox.style.visibility == "visible" && txt.value.length) {
    var subobjField = canvas.createElement("v:path");
    subobjField.setAttribute("textpathok") = "true";
    node.appendChild(subobjField);
    var subobjField = canvas.createElement("v:textpath");
    subobjField.setAttribute("on") = "true";
    subobjField.setAttribute("string") = txt.value;
    subobjField.setAttribute("style") = "font:normal normal normal 16pt 'Arial Black'";
    node.appendChild(subobjField);
  }
  canvas.documentElement.childNodes[0].appendChild(node);
}

function mouse_down() {
  drawKey = true;
  dx = xo;
  dy = yo;
  itemID++;
  if(ToolBarNum != 7) ShapeItemNum = 0;
  switch(ToolBarNum) {
    case 3:
      var objField = canvas.createElement("v:line");
      objField.setAttribute("from") = xo+","+yo;
      objField.setAttribute("to") = xo+","+yo;
      return setElement(objField);
    case 4:
      if(CurveItemNum == 0) {
        CurveItemNum = 1;
        var objField = canvas.createElement("v:curve");
        objField.setAttribute("from") = xo+","+yo;
        objField.setAttribute("to") = xo+","+yo;
        objField.setAttribute("control1") = xo+","+yo;
        objField.setAttribute("control2") = xo+","+yo;
        var subobjField = canvas.createElement("v:fill");
        subobjField.setAttribute("opacity") = 0;
        objField.appendChild(subobjField);
        return setElement(objField);
      }
      return;
    case 9:
      var objField = canvas.createElement("v:polyline");
      objField.setAttribute("points") = xo+","+yo+" "+xo+","+yo;
      var subobjField = canvas.createElement("v:fill");
      subobjField.setAttribute("opacity") = 0;
      objField.appendChild(subobjField);
      return setElement(objField);
    case 7:
      if(ShapeItemNum == 0) {
        var objField = canvas.createElement("v:shape");
        objField.setAttribute("style") = "width:500; height:309";
        objField.setAttribute("path") = "m "+xo+","+yo+" l "+xo+","+yo;
        ShapeItemX = xo;
        ShapeItemY = yo;
      }else {
        objField = canvas.documentElement.childNodes[0].lastChild;
        objField.setAttribute("path") = objField.getAttribute("path") + " "+xo+","+yo;
        return;
      }
      ShapeItemNum++;
      break;
    case 5:
      var objField = canvas.createElement("v:rect");
      break;
    case 6:
      var objField = canvas.createElement("v:roundrect");
      objField.setAttribute("arcsize") = 0.2;
      break;
    case 8:
      var objField = canvas.createElement("v:oval");
      break;
    case 10:
      s = "";
      s = tree(canvas.documentElement,1);
      view.innerHTML = s; 
      return;
    defaule:
      drawKey = false;
      return;
  }
  if(objField) {
    if(ToolBarNum != 7)
      objField.setAttribute("style") = "left:"+xo+"; top:"+yo+"; width:0; height:0;";
    var subobjField = canvas.createElement("v:fill");
    subobjField.setAttribute("opacity") = gradientBar.opacity;
    subobjField.setAttribute("angle") = gradientBar.angle;
    subobjField.setAttribute("type") = gradientBar.type;
    subobjField.setAttribute("color") = gradientBar.color.value;
    subobjField.setAttribute("color2") = gradientBar.color2.value;
    subobjField.setAttribute("colors") = gradientBar.colors.value;
    subobjField.setAttribute("focusposition") = gradientBar.focusposition;
    objField.appendChild(subobjField);
    return setElement(objField);
  }
  return;
}

function mouse_up() {
  drawKey = false;
  if(CurveItemNum > 0) CurveItemNum++;
  if(CurveItemNum > 3) CurveItemNum = 0;
  if(ToolBarNum == 7) {
    if(Math.abs(xo - ShapeItemX) < 2 && Math.abs(yo - ShapeItemY) < 2) {
      ShapeItemNum = 0;
      Element = canvas.documentElement.childNodes[0].lastChild;
      var regerp = / [0-9]+,[0-9]+$/
      var str = Element.getAttribute("path");
      Element.setAttribute("path") = str.replace(regerp," x e");
      view.innerHTML = tree(canvas.documentElement,0);
    }
  }
}

function paint() {
  Element = canvas.documentElement.childNodes[0].lastChild;
  var x0,y0,x1,y1;
  x0 = Math.min(dx,xo);
  y0 = Math.min(dy,yo);
  x1 = Math.max(dx,xo);
  y1 = Math.max(dy,yo);
  var box = "left:"+x0+"; top:"+y0+"; width:"+(x1-x0)+"; height:"+(y1-y0)+";";
  switch(ToolBarNum) {
    case 4:
      if(CurveItemNum ==2) {
        Element.setAttribute("control1") = xo+","+yo;
        Element.setAttribute("control2") = Element.getAttribute("to");
        break;
      }
      if(CurveItemNum ==3) {
        Element.setAttribute("control2") = xo+","+yo;
        break;
      }
    case 3:
      Element.setAttribute("to") = xo+","+yo;
      break;
    case 7:
      var regerp = /[0-9]+,[0-9]+$/
      var str = Element.getAttribute("path");
      Element.setAttribute("path") = str.replace(regerp,xo+","+yo);
      break;
    case 5:
    case 6:
    case 8:
      var regerp = /left.+height:[0-9]+;/
      var str = Element.getAttribute("style");
      Element.setAttribute("style") = str.replace(regerp,box);
      break;
    case 9:
      var regerp = / [0-9]+,[0-9]+$/
      var str = Element.getAttribute("points");
      Element.setAttribute("points") = str+" "+xo+","+yo;
      break;
    defaule:
      break;
  }

}

function init() {
  tool_box_refresh();  // 工具栏初始
  view.innerHTML = tree(canvas.documentElement);  // 绘图区初始
  color.innerHTML = tree(tools.selectNodes("*/colorbar")[0]);  // 颜色选择初始
  linebox.innerHTML = tree(tools.selectNodes("*/linebox")[0]);  // 线型选择初始
  gradientBox.innerHTML = tree(tools.selectNodes("*/gradient")[0]); 

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