In a previous example, “Restricting the movement of a pop up Spark TitleWindow container to a single axis in Flex 4″, we saw how you could limit the Spark TitleBar container’s movement to a single axis by modifying the TitleWindowBoundsEvent object’s afterBounds object using the windowMoving event.
The following example shows how you can constrain a Spark TitleWindow container within a Flex 4 application by modifying the TitleWindowBoundsEvent event object’s afterBounds property during the windowMoving event.
Full code after the jump.
The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 beta, check out the Adobe Flash Builder 4 page on the Adobe Labs site. To download the latest build of the Flex 4 SDK, see http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4. For instructions on using the beta Flex 4 SDK in Flex Builder 3, see "Using the beta Flex 4 SDK in Flex Builder 3".
<?xml version="1.0" encoding="utf-8"?> <!-- http://blog.flexexamples.com/2010/01/20/constraining-the-movement-on-a-spark-titlewindow-container-in-flex-4/ --> <s:Application name="Spark_TitleWindow_windowMoving_afterBounds_test" xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"> <s:controlBarContent> <s:Button id="btn" label="Launch TitleWindow" click="btn_clickHandler(event);" /> </s:controlBarContent> <fx:Script> <![CDATA[ import mx.core.UIComponent; import mx.events.CloseEvent; import mx.managers.PopUpManager; import spark.events.TitleWindowBoundsEvent; protected function titleWin_closeHandler(evt:CloseEvent):void { PopUpManager.removePopUp(evt.currentTarget as UIComponent); } protected function btn_clickHandler(evt:MouseEvent):void { PopUpManager.addPopUp(titleWin, this, true); PopUpManager.centerPopUp(titleWin); } protected function titleWin_windowMovingHandler(evt:TitleWindowBoundsEvent):void { if (evt.afterBounds.left < 0) { evt.afterBounds.left = 0; } else if (evt.afterBounds.right > systemManager.stage.stageWidth) { evt.afterBounds.left = systemManager.stage.stageWidth - evt.afterBounds.width; } if (evt.afterBounds.top < 0) { evt.afterBounds.top = 0; } else if (evt.afterBounds.bottom > systemManager.stage.stageHeight) { evt.afterBounds.top = systemManager.stage.stageHeight - evt.afterBounds.height; } } ]]> </fx:Script> <fx:Declarations> <s:TitleWindow id="titleWin" title="Spark TitleWindow" width="300" close="titleWin_closeHandler(event);" windowMoving="titleWin_windowMovingHandler(event);"> <s:layout> <s:VerticalLayout paddingLeft="10" paddingRight="10" paddingTop="10" paddingBottom="10" /> </s:layout> <s:Label text="The quick brown fox jumps over the lazy dog." fontSize="24" width="100%"/> </s:TitleWindow> </fx:Declarations> </s:Application>
View source is enabled in the following example.
This entry is based on a beta version of the Flex 4 SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex 4 SDK.
