Kaedah JavaScript untuk meniru tetingkap desktop-tutorial js-php.cn

Artikel ini terutamanya memperkenalkan kaedah meniru tetingkap desktop dalam JavaScript, yang boleh meniru pembukaan, penutupan, pergerakan, zum, memaksimumkan, meminimumkan dan fungsi lain tetingkap desktop Rakan yang memerlukannya boleh merujuk kepadanya, butirannya seperti berikut:
JS digunakan di sini untuk mensimulasikan pergerakan tetingkap desktop, mengezum, meminimumkan, memaksimumkan dan menutup dalam lapan arah, serta kesan pratonton klik dua kali untuk mengecil dan membesarkan tetingkap, dan menukar saiz tingkap.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>JS山寨桌面窗口</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<style type="text/css" media="screen">
html, body, p {
 margin: 0;
 padding: 0;
} 
html, body {
 background: #FFFFFF;
 width: 100%;
 height: 100%;
 overflow: hidden;
}
#box {
 position: absolute;
 top: 30%;
 left: 40%;
 width: 250px;
 height: 150px;
 background: #EEE;
 border: 1px solid #666;
 border-radius: 8px;
 box-shadow: 2px 2px 5px #777;
}
/*标题栏*/
#boxHeader {
 width: 100%;
 height: 30px;
 background: none!important;
 background: #EEE;
 border-bottom: 2px solid #AAA;
 border-radius: 5px 5px 0 0;
}
#button {
 float: right;
 width: 79px;
 height: 15px;
 margin: 5px 5px 0 0!important;
 margin: 5px 2px 0 0;
 background: #CCC;
 border-radius: 5px;
}
#button p {
 float: left;
 width: 25px;
 height: 15px;
 border-right: 2px #AAA solid;
}
#button .close {
 border: none;
 border-radius: 0px 5px 5px 0;
}
#button .minimize {
 border-radius: 5px 0 0 5px;
}
/*八个方向*/
/*用于显示变栏颜色，作为测试
#boxN, #boxE, #boxS, #boxW {
 background: red;
}
#boxNE, #boxES, #boxSW, #boxWN {
 background: green;
}
*/
#boxN{
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 5px;
 overflow: hidden;
}
#boxE{
 position: absolute;
 top: 0;
 right: 0;
 width: 5px;
 height: 100%;
 overflow: hidden;
}
#boxS{
 position: absolute;
 bottom: 0;
 left: 0;
 width: 100%;
 height: 5px;
 overflow: hidden;
}
#boxW{
 position: absolute;
 top: 0;
 left: 0;
 width: 5px;
 height: 100%;
 overflow: hidden;
}
#boxNE {
 position: absolute;
 right: 0;
 top: 0;
 width: 5px;
 height: 5px;
 overflow: hidden;
}
#boxES {
 position: absolute;
 right: 0;
 bottom: 0;
 width: 5px;
 height: 5px;
 overflow: hidden;
}
#boxSW {
 position: absolute;
 left: 0;
 bottom: 0;
 width: 5px;
 height: 5px;
 overflow: hidden;
}
#boxWN {
 position: absolute;
 left: 0;
 top: 0;
 width: 5px;
 height: 5px;
 overflow: hidden;
}
/*显示按钮*/
#showButton {
 display: none;
 position: absolute;
 top: 50%;
 left: 50%;
 margin: -75px 0 0 -75px; 
 width: 150px;
 height: 150px;
}
#showButton span {
 font: 50px bolder;
}
/*改变大小时的预览p*/
#virtualBox {
 position: absolute;
 background: #8EC6FF;
 border: 1px solid #147AFF;
 border-radius: 8px;
 opacity: 0.4;
 filter: alpha(opacity = 40);
}
</style>
<script type="text/javascript">
//拖扯box函数
var dragp = function() {
 var box = document.getElementById("box");
 var boxHeader = document.getElementById("boxHeader");
 var bDraging = false;
 var disX = disY = 0;
 //记录鼠标按下时距离box左、上边框距离
 boxHeader.onmousedown = function(event) {
  bDraging = true;
  document.body.style.cursor = "move";
  var event = event || window.event;
  disX = event.clientX - box.offsetLeft;
  disY = event.clientY - box.offsetTop;
  //拖动box
  document.onmousemove = function(event) {
   if(!bDraging) return false;
   document.body.style.cursor = "move";
   var event = event || window.event;
   var boxX = event.clientX - disX;
   var boxY = event.clientY - disY;
   var maxX = document.body.scrollWidth - box.offsetWidth;
   var maxY = document.body.offsetHeight - box.offsetHeight;
   boxX = (boxX < 0) ? 0 : boxX;
   boxY = (boxY < 0) ? 0 : boxY;
   boxX = (boxX > maxX) ? maxX : boxX;
   boxY = (boxY > maxY) ? maxY : boxY;
   box.style.left = boxX + "px";
   box.style.top = boxY + "px";
  };
  document.onmouseup = function() {
   bDraging = false;
   document.body.style.cursor = "";
  };
  return false;
 };
};
var changeSize = function() {
 var box = document.getElementById("box");
 var virtualBox = document.getElementById("virtualBox");
 var boxSide = document.getElementById("boxSide").getElementsByTagName("p");
 var bSizeChanging = bMousedowning = false;
 //box是否正在改变 & 鼠标是否正在按下
 var originalWidth = box.offsetWidth;
 //box最原始宽度
 var originalHeight = box.offsetHeight;
 //box最原始高度
 for(var i = 0; i < boxSide.length; i++) {
 //遍历boxside，监听鼠标
  boxSide[i].index = i;
  boxSide[i].onmouseover = function() {
   if(bMousedowning) return false;
   changeCursor(true, this.index);
  };
  boxSide[i].onmouseout = function() {
   if(bMousedowning) return false;
   changeCursor(false, this.index);
  };
  boxSide[i].onmousedown = function(event) {
   var event = event || window.event;   
   var index = this.index;
   var aBoxPrevious = new Array();
   //记录box上一次的状态
   aBoxPrevious["clientX"] = event.clientX;
   aBoxPrevious["clientY"] = event.clientY;
   aBoxPrevious["left"] = box.offsetLeft;
   aBoxPrevious["top"]= box.offsetTop;
   aBoxPrevious["width"] = box.offsetWidth;
   aBoxPrevious["height"] = box.offsetHeight;
   bMousedowning = true;
   bSizeChanging = true;
   showVirtualBox(virtualBox, aBoxPrevious);
   document.onmousemove = function(event) {
    if(!bSizeChanging) return false;
    changeVirtualBoxSize(event, aBoxPrevious, index);
   };
   document.onmouseup = function() {
    changeBoxSize(virtualBox)
    hideVirtualBox(virtualBox);
    bSizeChanging = false;
    bMousedowning = false;
    changeCursor(false, index);
   };
   return false;
  };
 }
 //改变鼠标指针样式
 var changeCursor = function(bIsShowing, index) {
  if(bIsShowing) {
   var cursorStyle = ["n-resize","e-resize","s-resize","w-resize","ne-resize","se-resize","sw-resize","nw-resize"];
   document.body.style.cursor = cursorStyle[index];
  }
  else {
   document.body.style.cursor = "";
  }
 };
 //显示预览p
 var showVirtualBox = function(virtualBox, aBoxPrevious) {
  with(virtualBox.style) {
   display = "block";
   top = aBoxPrevious["top"] + "px";
   left = aBoxPrevious["left"] + "px";
   width = aBoxPrevious["width"] + "px";
   height = aBoxPrevious["height"] + "px";
  }
 }
 //隐藏预览p
 var hideVirtualBox = function(virtualBox) {
  virtualBox.style.display = "none";
 }
 //改变box大小
 var changeVirtualBoxSize = function(event, aBoxPrevious, index) {
  var event = event || window.event;
  var bTop = bRight = bBottom = bLeft = false;
  //八个方向，分别为N、E、S、W、NE、SW、SW、NW
  switch (index) {
   case 0:
    bTop = true;
    break;
   case 1:
    bRight = true;
    break;
   case 2:
    bBottom = true;
    break;
   case 3:
    bLeft = true;
    break;
   case 4:
    bTop = bRight = true;;
    break;
   case 5:
    bRight = bBottom = true;
    break;
   case 6:
    bBottom = bLeft = true;
    break;
   case 7:
    bLeft = bTop = true;
    break;
   default:
    break;
  }
  //向北改变高度
  if(bTop) {
   var newTopHeight = aBoxPrevious["height"] - (event.clientY - aBoxPrevious["clientY"]);
   (newTopHeight < originalHeight) && (newTopHeight = originalHeight);
   (newTopHeight > aBoxPrevious["top"] + aBoxPrevious["height"]) && (newTopHeight = aBoxPrevious["top"] + aBoxPrevious["height"]);
   var newTop = aBoxPrevious["top"] + (event.clientY - aBoxPrevious["clientY"]);
   (newTop > aBoxPrevious["top"] + aBoxPrevious["height"] - originalHeight) && (newTop = aBoxPrevious["top"] + aBoxPrevious["height"] - originalHeight);
   (newTop < 0) && (newTop = 0);
   virtualBox.style.top = newTop + "px";
   virtualBox.style.height = newTopHeight - box.clientTop * 2 + "px"; 
   //不能忽略border-width
   bTop = false;
  }
  //向东改变宽度
  if(bRight) {
   var newRightWidth = aBoxPrevious["width"] + (event.clientX - aBoxPrevious["clientX"]);
   (newRightWidth < originalWidth) && (newRightWidth = originalWidth);
   (newRightWidth > document.body.scrollWidth - aBoxPrevious["left"]) && (newRightWidth = document.body.scrollWidth - aBoxPrevious["left"]);
   virtualBox.style.width = newRightWidth - box.clientTop * 2 + "px";
   bRight = false;
  }
  //向南改变高度
  if(bBottom) {
   var newBottomHeight = aBoxPrevious["height"] + (event.clientY - aBoxPrevious["clientY"]);
   (newBottomHeight < originalHeight) && (newBottomHeight = originalHeight);
   (newBottomHeight > document.body.scrollHeight - aBoxPrevious["top"]) && (newBottomHeight = document.body.scrollHeight - aBoxPrevious["top"]);
   virtualBox.style.height = newBottomHeight - box.clientTop * 2 + "px";
   bBottom = false;
  }
  //向西改变宽度
  if(bLeft) {
   var newLeftWidth = aBoxPrevious["width"] - (event.clientX - aBoxPrevious["clientX"]);
   (newLeftWidth < originalWidth) && (newLeftWidth = originalWidth);
   (newLeftWidth > aBoxPrevious["left"] + aBoxPrevious["width"]) && (newLeftWidth = aBoxPrevious["left"] + aBoxPrevious["width"]);
   var newLeft = aBoxPrevious["left"] + (event.clientX - aBoxPrevious["clientX"]);
   (newLeft > aBoxPrevious["left"] + aBoxPrevious["width"] - originalWidth) && (newLeft = aBoxPrevious["left"] + aBoxPrevious["width"] - originalWidth);
   (newLeft < 0) && (newLeft = 0);
   virtualBox.style.left = newLeft + "px";
   virtualBox.style.width = newLeftWidth - box.clientLeft * 2 + "px";
   bLeft = false;
  }
 };
 var changeBoxSize = function(virtualBox) {
  with(box.style) {
   left = virtualBox.style.left;
   top = virtualBox.style.top;
   width = virtualBox.style.width;
   height = virtualBox.style.height;
  }
 }
};
//窗口按钮函数
boxButton = function() {
 var box = document.getElementById("box");
 var boxHeader = document.getElementById("boxHeader");
 var aButton = document.getElementById("button").getElementsByTagName("p");
 var showButton = document.getElementById("showButton");
 var span = showButton.getElementsByTagName("span")[0];
 var bIsMin = bIsMax = false;
 //目前状态是否最小 or 最大
 boxHeader.ondblclick = function() {
  maximize();
 }
 for(var i = 0; i < aButton.length; i++) {
  aButton[i].index = i;
  aButton[i].onmouseover = function() {
   aButton[this.index].style.background = "#AAA";
   document.body.style.cursor = "pointer";
  };
  aButton[i].onmouseout = function() {
   aButton[this.index].style.background = "";
   document.body.style.cursor = ""
  };
  aButton[i].onclick = function() {
   switch(this.index) {
    case 0:
     minimize();
     break;
    case 1:
     maximize();
     break;
    case 2:
     close();
     break;
    default:
     break;
   }
  };
 }
 var minimize = function() {
  if(bIsMin) {
   resumeBox();
   bIsMin = false;
  }
  else {
   box.style.width = "89px";
   box.style.height = "32px";
   box.style.left = "2%";
   box.style.top = document.body.offsetHeight - box.offsetHeight - 15 + "px";
   bIsMin = true;
   bIsMax = false;
  }
 };
 var maximize = function() {
  if(bIsMax) {
   resumeBox();
   bIsMax = false;
  }
  else {
   box.style.width = document.body.scrollWidth - 10 + "px";
   box.style.height = document.body.scrollHeight - 10 + "px";
   box.style.left = "5px";
   box.style.top = "5px";
   bIsMax = true;
   bIsMin = false;
  }
 };
 var close = function() {
  box.style.display = "none";
  showButton.style.display = "block";
 };
 var resumeBox = function() {
  box.style.top = "30%";
  box.style.left = "40%";
  box.style.width = "250px";
  box.style.height = "150px";
 };
 showButton.onmousedown = function() {
  span.innerHTML = "^o^";
 };
 showButton.onclick = function() {
  this.style.display = "none";
  span.innerHTML = ">_<";
  resumeBox();
  box.style.display = "block";
 };
};
window.onload = function() {
 changeSize();
 dragp();
 boxButton();
};
</script>
</head>
<body>
<p id="box">
 <p id="boxHeader">
  <p id="button">
   <p class="minimize"></p>
   <p class="maximize"></p>
   <p class="close"></p>
  </p>
 </p>
 <p id="boxSide">
  <p id="boxN"></p>
  <p id="boxE"></p>
  <p id="boxS"></p>
  <p id="boxW"></p>
  <p id="boxNE"></p>
  <p id="boxES"></p>
  <p id="boxSW"></p>
  <p id="boxWN"></p>
 </p>
</p>
<button id="showButton"><span>>_<</span><p>居然关掉人家，讨厌~</p><p>快打开</p></button>
<p id="virtualBox"></p>
</body>
</html>
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