jQuery UI 實例 - 定位（Position）

相對窗口、文檔、錨、游標/滑鼠等元素定位一個元素。

如需瞭解更多有關 .position() 方法的細節，請查看 API 文檔 .position()。

默認功能

使用表單控件配置位置，或者拖拽被定位的元素來修改它的偏移量。向四周拖拽父元素來查看碰撞檢測。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 定位（Position） - 默認功能</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.9.1.js"></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
  <style>
  #parent {
    width: 60%;
    height: 40px;
    margin: 10px auto;
    padding: 5px;
    border: 1px solid #777;
    background-color: #fbca93;
    text-align: center;
  }
  .positionable {
    position: absolute;
    display: block;
    right: 0;
    bottom: 0;
    background-color: #bcd5e6;
    text-align: center;
  }
  #positionable1 {
    width: 75px;
    height: 75px;
  }
  #positionable2 {
    width: 120px;
    height: 40px;
  }
  select, input {
    margin-left: 15px;
  }
  </style>
  <script>
  $(function() {
    function position() {
      $( ".positionable" ).position({
        of: $( "#parent" ),
        my: $( "#my_horizontal" ).val() + " " + $( "#my_vertical" ).val(),
        at: $( "#at_horizontal" ).val() + " " + $( "#at_vertical" ).val(),
        collision: $( "#collision_horizontal" ).val() + " " + $( "#collision_vertical" ).val()
      });
    }

    $( ".positionable" ).css( "opacity", 0.5 );

    $( "select, input" ).bind( "click keyup change", position );

    $( "#parent" ).draggable({
      drag: position
    });

    position();
  });
  </script>
</head>
<body>

<div id="parent">
  <p>
  這是父元素的位置。

  </p>
</div>

<div class="positionable" id="positionable1">
  <p>
  to position
  </p>
</div>

<div class="positionable" id="positionable2">
  <p>
  to position 2
  </p>
</div>

<div style="padding: 20px; margin-top: 75px;">
  定位...
  <div style="padding-bottom: 20px;">
    <b>my:</b>
    <select id="my_horizontal">
      <option value="left">left</option>
      <option value="center">center</option>
      <option value="right">right</option>
    </select>
    <select id="my_vertical">
      <option value="top">top</option>
      <option value="center">center</option>
      <option value="bottom">bottom</option>
    </select>
  </div>
  <div style="padding-bottom: 20px;">
    <b>at:</b>
    <select id="at_horizontal">
      <option value="left">left</option>
      <option value="center">center</option>
      <option value="right">right</option>
    </select>
    <select id="at_vertical">
      <option value="top">top</option>
      <option value="center">center</option>
      <option value="bottom">bottom</option>
    </select>
  </div>
  <div style="padding-bottom: 20px;">
    <b>collision:</b>
    <select id="collision_horizontal">
      <option value="flip">flip</option>
      <option value="fit">fit</option>
      <option value="flipfit">flipfit</option>
      <option value="none">none</option>
    </select>
    <select id="collision_vertical">
      <option value="flip">flip</option>
      <option value="fit">fit</option>
      <option value="flipfit">flipfit</option>
      <option value="none">none</option>
    </select>
  </div>
</div>


</body>
</html>

圖像迴圈

一個照片流覽器的原型，使用 Position 分別把圖片定為在左邊、中間、右邊，然後迴圈顯示。使用頂部的鏈接來迴圈圖像，或者在圖像的左側或右側點擊來迴圈圖像。請注意，當調整窗口大小時，會重新定位圖像。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI 定位（Position） - 圖像迴圈</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.9.1.js"></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
  <style>
  body {
    margin: 0;
  }
  #container {
    overflow: hidden;
    position: relative;
    height: 400px;
  }

  img {
    position: absolute;
  }
  </style>
  <script>
  $(function() {
    // 重構部件，去除這些插件方法
    $.fn.left = function( using ) {
      return this.position({
        my: "right middle",
        at: "left+25 middle",
        of: "#container",
        collision: "none",
        using: using
      });
    };
    $.fn.right = function( using ) {
      return this.position({
        my: "left middle",
        at: "right-25 middle",
        of: "#container",
        collision: "none",
        using: using
      });
    };
    $.fn.center = function( using ) {
      return this.position({
        my: "center middle",
        at: "center middle",
        of: "#container",
        using: using
      });
    };

    $( "img:eq(0)" ).left();
    $( "img:eq(1)" ).center();
    $( "img:eq(2)" ).right();

    function animate( to ) {
      $( this ).stop( true, false ).animate( to );
    }
    function next( event ) {
      event.preventDefault();
      $( "img:eq(2)" ).center( animate );
      $( "img:eq(1)" ).left( animate );
      $( "img:eq(0)" ).right().appendTo( "#container" );
    }
    function previous( event ) {
      event.preventDefault();
      $( "img:eq(0)" ).center( animate );
      $( "img:eq(1)" ).right( animate );
      $( "img:eq(2)" ).left().prependTo( "#container" );
    }
    $( "#previous" ).click( previous );
    $( "#next" ).click( next );

    $( "img" ).click(function( event ) {
      $( "img" ).index( this ) === 0 ? previous( event ) : next( event );
    });

    $( window ).resize(function() {
      $( "img:eq(0)" ).left( animate );
      $( "img:eq(1)" ).center( animate );
      $( "img:eq(2)" ).right( animate );
    });
  });
  </script>
</head>
<body>

<div id="container">
  <earth