Atlas学习手记(24):使用行为增强用户界面(四):Popup Behavior
Popup Behavior提供了Popup的功能,可以用来实现高级的Tooltip。
主要内容
1.Popup Behavior简介
2.完整示例
一.Popup Behavior简介
Popup Behavior提供了Popup的功能,可以用来实现高级的Tooltip。简单示例代码:
<popupBehavior
dataContext="source for data binding operations"
id="identifier for looking up the component by name"
parentElement="DOM element used as anchor for popup"
positioningMode="Absolute|Center|BottomLeft|BottomRight|TopLeft|TopRight"
x="0"
y="0"
>
<bindings>
<!-- bindings -->
</bindings>
<propertyChanged>
<!-- other actions -->
</propertyChanged>
</popupBehavior>
dataContext="source for data binding operations"
id="identifier for looking up the component by name"
parentElement="DOM element used as anchor for popup"
positioningMode="Absolute|Center|BottomLeft|BottomRight|TopLeft|TopRight"
x="0"
y="0"
>
<bindings>
<!-- bindings -->
</bindings>
<propertyChanged>
<!-- other actions -->
</propertyChanged>
</popupBehavior>
其中positioningMode指定了Popup元素显示的位置。
二.完整示例
看一个完整的示例,这里用Popup Behavior和前面说过的Hover Behavior来实现一个Drop-Down Box。在ASPX页面中先加入HTML元素:
<div>
<h3>
Popup Behavior Example</h3>
What is the definition of a <a id="hoverLink" class="hoverlabel">word</a>?
<div id="popup" style="visibility: hidden; display: none; border: solid 1px black;
background-color: Yellow;">
A sound or a combination of sounds.
</div>
</div>
<h3>
Popup Behavior Example</h3>
What is the definition of a <a id="hoverLink" class="hoverlabel">word</a>?
<div id="popup" style="visibility: hidden; display: none; border: solid 1px black;
background-color: Yellow;">
A sound or a combination of sounds.
</div>
</div>
用到的CSS如下:
<style type="text/css">
.hoverlabel {
CURSOR: pointer; BACKGROUND-COLOR: #00dd00
}
</style>
.hoverlabel {
CURSOR: pointer; BACKGROUND-COLOR: #00dd00
}
</style>
编写Atlas脚本,注意popupBehavior加在了Div元素上,而hoverBehavior加在了HyperLink上并使用了Show和Hide方法。
<script type="text/xml-script">
<page xmlns:script="http://schemas.microsoft.com/xml-script/2005">
<components>
<control id="popup">
<behaviors>
<popupBehavior id="popupBehavior" parentElement="hoverLink" positioningMode="BottomLeft"/>
</behaviors>
</control>
<hyperLink id="hoverLink">
<behaviors>
<hoverBehavior unhoverDelay="1000" hoverElement="popup">
<hover>
<invokeMethod target="popupBehavior" method="show"/>
</hover>
<unhover>
<invokeMethod target="popupBehavior" method="hide"/>
</unhover>
</hoverBehavior>
</behaviors>
</hyperLink>
</components>
</page>
</script>
<page xmlns:script="http://schemas.microsoft.com/xml-script/2005">
<components>
<control id="popup">
<behaviors>
<popupBehavior id="popupBehavior" parentElement="hoverLink" positioningMode="BottomLeft"/>
</behaviors>
</control>
<hyperLink id="hoverLink">
<behaviors>
<hoverBehavior unhoverDelay="1000" hoverElement="popup">
<hover>
<invokeMethod target="popupBehavior" method="show"/>
</hover>
<unhover>
<invokeMethod target="popupBehavior" method="hide"/>
</unhover>
</hoverBehavior>
</behaviors>
</hyperLink>
</components>
</page>
</script>
运行后如下:
当鼠标移动到“word”上后: