JavaScript

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JavaScript

const.js：源码内容
							/*------------------------------------------------------------------------------
+                        系统常量的定义			          					   +
+                            												   +
+						        											   +
-------------------------------------------------------------------------------*/
	//是否可以拖动
	var fDragApproved=false;
	var fSelectedObj,fx,fy;    //当前所选择的对象
	//选择的按钮
    var fLiftButton="sel";
	//是否在画线 0,不在画线；1,起点；2,终点
	var fAddLineFlag = 0;
	var fLineStartObj = null;
	var fLineEndObj = null;
	//控件的数量
	var fCtlNum;
	//表格宽度和高度
	var fGridNo=20;
	//类型
	var CNST_CTLTYPE_INITIAL  = "initial";  //启动
	var CNST_CTLTYPE_STEPS    = "steps";    //步骤
	var CNST_CTLTYPE_JOINS    = "joins";    //连接
	var CNST_CTLTYPE_SPLITS   = "splits";   //分割
	var CNST_CTLTYPE_LINES    = "lines";    //线段
	//增加到控件列表中
	function addToObjArray (obj,toLine) {
		var oOption = document.createElement("OPTION");
		sltObjArray.options.add(oOption);
		oOption.innerText = obj;
		oOption.value = obj;
		fSelectedObj = eval(obj);
		if (toLine==true) {
        	moveObjToline(fSelectedObj);
		}
		fCtlNum++; //对象计数
		iptCtlNum.value=fCtlNum; //控件中计数同步
	}
	//从控件列表删除
	function removeFromObjArray (obj) {
		for (var i=0;i<sltObjArray.options.length;i++) {
			if (obj.id==sltObjArray.options[i].value) {
				sltObjArray.options[i] = null; //删除
				break;
			}
		}
	}
	//四舍五入
	function floatRound(myFloat) {
		var cutNumber = Math.pow(10,0);
		return Math.round(myFloat * cutNumber)/cutNumber;
	}
	//适应表格
	function moveObjToline(aObj) {
		aObj.style.left = Math.abs(floatRound((parseInt(aObj.style.left)+parseInt(aObj.style.width)/2)/fGridNo)*fGridNo - parseInt(aObj.style.width)/2);
		aObj.style.top  = Math.abs(floatRound((parseInt(aObj.style.top)+parseInt(aObj.style.height)/2)/fGridNo)*fGridNo - parseInt(aObj.style.height)/2);
	}
	function cf_CalculateLinePos (aStart,aEnd) {
    	var posArray = new Array();
		var x1,y1,x2,y3,x3,y3,x4,y4;
		var sl,st,sw,sh,el,et,ew,eh;
		var spacing;
		//开始
		with (aStart.style) {
			sl = parseInt(pixelLeft);  //Left
			st = parseInt(pixelTop);   //Top
			sw = 20;//parseInt(width);      //width
			sh = 15;//parseInt(height);     //height
		}
		//结束
		with (aEnd.style) {
			el = parseInt(pixelLeft);  //Left
			et = parseInt(pixelTop);   //Top
			ew = 20;//parseInt(width);      //width
			eh = 15;//parseInt(height);     //height
		}
		//计算路线
		x1 = sl+sw/2;
		y1 = st+sh/2;
		x4 = el+ew/2;
		y4 = et+eh/2;
		var i,j;
		i = x4-x1;
		j = y4-y1;
		if (j>0) {
			if (Math.abs(j)<=Math.abs(i)) {
				if (j<=eh/2) {
					if (i>0) {
            			x3 = x1;
                		y3 = y1;
						x4 = el;
                		y4 = y1;
					} else {
            			x3 = x1;
                		y3 = y1;
						x4 = el+ew+4;
                		y4 = y1;
					}
				} else {
            		x3 = x4;
                	y3 = y1;
                	y4 = et;
				}
			} else {
				if (Math.abs(i)<=ew/2) {
                	x3 = x1;
                    y3 = y1;
                    x4 = x1;
                    y4 = et;
                } else {
					if (i==0) {
            			x3 = x1;
                		y3 = y1;
						y4 = et;
					} else if (i>0) {
                    	x3 = x1;
                		y3 = y4;
						x4 = el;
					} else {
            			x3 = x1;
                		y3 = y4;
						x4 = el+ew+4;
					}
                }
			}
		} else if (j<0) {
			if (Math.abs(j)<=Math.abs(i)) {
				if (Math.abs(j)<=eh/2) {
					if (i>0) {
            			x3 = x1;
                		y3 = y1;
						x4 = el;
                		y4 = y1;
					} else {
            			x3 = x1;
                		y3 = y1;
						x4 = el+ew+4;
                		y4 = y1;
					}
				} else {
            		x3 = x4;
                	y3 = y1;
                	y4 = et+eh+4;
				}
			} else {
				if (Math.abs(i)<=ew/2) {
                	x3 = x1;
                    y3 = y1;
                    x4 = x1;
                    y4 = et+eh+4;
				} else {
					if (i==0) {
            			x3 = x1;
                		y3 = y1;
						y4 = et+eh+4;
					} else if (i>0) {
            			x3 = x1;
                		y3 = y4;
						x4 = el;
					} else {
            			x3 = x1;
                		y3 = y4;
						x4 = el+ew+4;
					}
				}
			}
		} else {
			if (i==0) {
				x3 = x1;
				y3 = y1;
				x4 = el+ew+4;
			} else if (i>0) {
				x3 = x1;
				y3 = y1;
				x4 = el;
			} else {
				x3 = x1;
				y3 = y1;
				x4 = el+ew+4;
			}
		}
        x2 = x1;
        y2 = y1;
		//放到数组里面
		posArray["x1"] = x1;
		posArray["x2"] = x2;
		posArray["x3"] = x3;
		posArray["x4"] = x4;
		posArray["y1"] = y1;
		posArray["y2"] = y2;
		posArray["y3"] = y3;
		posArray["y4"] = y4;
		return posArray;  //返回
	}

						