Flex中的弹出窗口(mx.managers.PopUpManager)

flex PopUpManager类
　　PopUpManager 类 PopUpManager 类ActionScript 类名称mx.managers.PopUpManager
　　PopUpManager 类的方法摘要
　　PopUpManager.createPopUp() 创建弹出窗口。
　　PopUpManager.deletePopUp() 删除由调用PopUpManager.createPopUp() 而创建的弹出窗口。
　　PopUpManager.createPopUp(parent,class,modal [,initobj,outsideEvents])
　　参数:parent 对弹出窗口所基于的窗口的引用。
　　class 对要创建的对象的类的引用。
　　modal 一个布尔值，它指示该窗口是(true) 否(false) 是模式
　　initobj 一个包含初始化属性的对象。此参数是可选的。

　　outsideEvents 一个布尔值，指示在用户单击窗口以外的区域时是(true) 否(false) 触发事件。此参数是可选的。

1.PopUpManager--createPopUp与addPopUp区别

createPopUp:是上来先设置好弹出方式，然后在new出来一个TitleWindow的对象，然后通过此对象设置他的变现形式。

addPopUp：是先new出来对象，设置好表现形式，然后在选择弹出来的方式。

一定要注意new对象与弹出方式的先后顺序。

addPopUp代码

1. <?xml version="1.0"encoding="utf-8"?>
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="vertical"
4. verticalAlign="middle"
5. backgroundColor="white"
6. creationComplete="init()">
8. <mx:Script>
9. <![CDATA[
10. importmx.controls.Label;
11. importmx.events.CloseEvent;
12. importmx.containers.TitleWindow;
13. importmx.managers.PopUpManager;
15. privatevar titleWindow:TitleWindow;
17. privatefunction init():void{
18. varlabel:Label = newLabel();
19. label.text= "Hello world";
21. titleWindow= newTitleWindow();
22. titleWindow.title= "Custom title";
23. titleWindow.showCloseButton= true;
24. titleWindow.width= 240;
25. titleWindow.height= 180;
26. titleWindow.addEventListener(CloseEvent.CLOSE,titleWindow_close);
27. titleWindow.addChild(label);
29. PopUpManager.addPopUp(titleWindow,this,true);
30. PopUpManager.centerPopUp(titleWindow);
31. }
33. privatefunction titleWindow_close(evt:CloseEvent):void{
34. PopUpManager.removePopUp(titleWindow);
35. }
36. ]]>
37. </mx:Script>
39. <mx:Button label="LaunchTitleWindow" click="init()"/>
41. </mx:Application>

createPopUp代码：

1. <?xml version="1.0"encoding="utf-8"?>
2. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
3. layout="vertical"
4. verticalAlign="middle"
5. backgroundColor="white"
6. creationComplete="init()">
8. <mx:Script>
9. <![CDATA[
10. importmx.managers.PopUpManagerChildList;
11. importmx.controls.Label;
12. importmx.events.CloseEvent;
13. importmx.containers.TitleWindow;
14. importmx.managers.PopUpManager;
16. privatevar titleWindow:TitleWindow;
18. privatefunction init():void{
19. varlabel:Label = newLabel();
20. label.text= "Hello world";
21. titleWindow= newTitleWindow();
22. titleWindow= TitleWindow(PopUpManager.createPopUp(this,TitleWindow,true));
23. titleWindow.title= "Custom title";
24. titleWindow.showCloseButton= true;
25. titleWindow.width= 240;
26. titleWindow.height= 180;
27. titleWindow.addChild(label);
28. titleWindow.addEventListener(CloseEvent.CLOSE,titleWindow_close);
29. PopUpManager.centerPopUp(titleWindow);
30. }
32. privatefunction titleWindow_close(evt:CloseEvent):void{
33. PopUpManager.removePopUp(titleWindow);
34. }
35. ]]>
36. </mx:Script>
38. <mx:Button label="LaunchTitleWindow" click="init()"/>
40. </mx:Application>

2.弹出窗口为DataGrid添加新数据

(1)Note.as

package
{
public class Note
{
public var author:String;
public var topic:String;
public var description:String;
}
}

(2)AddNote.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute" width="348" height="218"
title="Add A Note">
<mx:Metadata>
[Event(name="SaveNote")]
</mx:Metadata>
<mx:Script>
<![CDATA[
import mx.managers.PopUpManager;
//PopUpManager.createPopUp() 创建弹出窗口
private function close():void
{
PopUpManager.removePopUp(this);
}

private function save():void
{
this.dispatchEvent(new Event("SaveNote"));
}
]]>
</mx:Script>
<mx:Label text="Author" x="35" y="10"/>
<mx:TextInput id="author" width="150" x="84" y="8"/>
<mx:Label text="Topic" y="36" x="42"/>
<mx:TextInput id="topic" width="150" x="84" y="34"/>
<mx:Label text="Description" y="62" x="10"/>
<mx:TextArea id="description" width="234" height="77" x="84" y="61"/>
<mx:Button label="Cancel" click="close()" x="193" y="146"/>
<mx:Button label="Save" click="save()" x="264" y="146"/>
</mx:TitleWindow >

(3)Test.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application
xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute"
width="500" height="300"
creationComplete="init()">
<mx:Script>
<![CDATA[
import mx.managers.PopUpManager;
import mx.collections.ArrayCollection;

[Bindable]
private var notes:ArrayCollection = new ArrayCollection();

private var addNoteScreen:AddNote;

private function init():void
{
addNoteScreen = new AddNote();
addNoteScreen.addEventListener("SaveNote",saveNote);
}

private function addNote():void
{
PopUpManager.addPopUp(addNoteScreen,this,true);
PopUpManager.centerPopUp(addNoteScreen);
addNoteScreen.author.text = "";
addNoteScreen.topic.text = "";
addNoteScreen.description.text = "";
}

private function saveNote(e:Event):void
{
var note:Note = new Note();
note.author = addNoteScreen.author.text;
note.topic = addNoteScreen.topic.text;
note.description = addNoteScreen.description.text;
notes.addItem(note);
PopUpManager.removePopUp(addNoteScreen);
}
]]>
</mx:Script>
<mx:Panel title="Notes"
width="100%" height="100%"
layout="vertical" horizontalAlign="right"
paddingTop="3" paddingLeft="3" paddingRight="3" paddingBottom="3">
<mx:DataGrid dataProvider="{notes}" width="100%" height="100%">
<mx:columns>
<mx:DataGridColumn headerText="Author" dataField="author" width="80"/>
<mx:DataGridColumn headerText="Topic" dataField="topic" width="100"/>
<mx:DataGridColumn headerText="Description" dataField="description"/>
</mx:columns>
</mx:DataGrid>
<mx:Button label="Add Note" click="addNote()"/>
</mx:Panel>
</mx:Application>