Anchor锚点布局

　　Ext.layout.container.Anchor是根据容器大小为其所包含的子面板进行定位的布局，对应面板布局配置项Anchor。

　　1、百分比（Percentage）定位

　　代码：

<!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 runat="server">
    <title>Ext.layout.container.Anchor示例</title>
    <link href="ext-4.0.7-gpl/resources/css/ext-all.css" rel="stylesheet" type="text/css" />
    <script src="ext-4.0.7-gpl/bootstrap.js" type="text/javascript"></script>
    <script type="text/javascript">
        Ext.onReady(function () {
            Ext.create("Ext.panel.Panel", {
                title: "Ext.layout.container.Anchor示例",
                frame: true,
                width: 300,
                height: 200,
                renderTo: Ext.getBody(),
                bodyPadding: 5,
                layout: "anchor",
                defaults: {
                    bodyStyle: "background-color:#FFFFFF"
                },
                items: [{
                    anchor: "80% 50%", // 第一项宽度百分比，第二项高度百分比
                    title: "子面板"
                }]
            });
        });
    </script>
</head>
<body>
</body>
</html>

　　效果图：

　　2、偏移定位

　　代码：

<!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 runat="server">
    <title>Ext.layout.container.Anchor示例</title>
    <link href="ext-4.0.7-gpl/resources/css/ext-all.css" rel="stylesheet" type="text/css" />
    <script src="ext-4.0.7-gpl/bootstrap.js" type="text/javascript"></script>
    <script type="text/javascript">
        Ext.onReady(function () {
            Ext.create("Ext.panel.Panel", {
                title: "Ext.layout.container.Anchor示例",
                frame: true,
                width: 300,
                height: 200,
                renderTo: Ext.getBody(),
                bodyPadding: 5,
                layout: "anchor",
                defaults: {
                    bodyStyle: "background-color:#FFFFFF"
                },
                items: [{
                    anchor: "-10 -50",
                    title: "子面板"
                }]
            });
        });
    </script>
</head>
<body>
</body>
</html>

　　效果图：

　　3、参考边（Sides）定位

　　代码：

<!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 runat="server">
    <title>Ext.layout.container.Anchor示例</title>
    <link href="ext-4.0.7-gpl/resources/css/ext-all.css" rel="stylesheet" type="text/css" />
    <script src="ext-4.0.7-gpl/bootstrap.js" type="text/javascript"></script>
    <script type="text/javascript">
        Ext.onReady(function () {
            Ext.create("Ext.panel.Panel", {
                title: "Ext.layout.container.Anchor示例",
                frame: true,
                width: 300,
                height: 200,
                renderTo: Ext.getBody(),
                bodyPadding: 5,
                layout: "anchor",
                defaults: {
                    bodyStyle: "background-color:#FFFFFF"
                },
                items: [{
                    anchor: "r b", // r:right b:bottom
                    width: 200,
                    height: 100,
                    title: "子面板"
                }]
            });
        });
    </script>
</head>
<body>
</body>
</html>