You can dispatch event from your custom MXML component...
I suggest, having setters/getters functions in your custom component. Whenever a property is set, dispatch appropriate event. Read docs more about dispatching event. -abdul On 1/25/07, paperbyolga <[EMAIL PROTECTED]> wrote:
Hi, i need help with a change event listener. I want to simply fire off a call to a webservice when a variable changes. I have a combobox that fires a function that sets a variable that gets passed to a component. if the variable changes in the component, i want to fire a webservice to get new data... perhaps there is a simple way to do this... so i'm open, thought an event listener would do the trick, but.... i've looked at a few things and frankly... i'm lost. New to flex, so getting my head around client server versus web programming is a challenge. any examples, help or direction would be great. thanks in advance. code is below. Shane ***** main comp **** <?xml version="1.0" encoding="utf-8"?> <mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml"; width="100%" height="100%" backgroundColor="#ffffff" horizontalScrollPolicy="off" verticalScrollPolicy="off" initialize="locws.getStates.send();" xmlns:st="stat.*"> <mx:Script> <![CDATA[ import mx.controls.Alert; import mx.utils.ArrayUtil; import mx.events.TreeEvent; [Bindable] private var thisLocationType:int = 0; [Bindable] private var thisLocationCode:String = '00'; [Bindable] private var thisLocLabel:String = ''; private function changeState():void { if (statsHome.visible == false) { statsHome.visible = true; } if (locStates.selectedItem.LOC_CODE == '00') { currentState=''; } else { currentState='locstateselected'; vCountyRadio.selected=false; vMetroRadio.selected=false; } lbHist.text = 'History: '; thisLocLabel = locStates.selectedItem.LOC_NAME; csState.label = '> ' + locStates.selectedItem.LOC_NAME; thisLocationCode = locStates.selectedItem.LOC_CODE; thisLocationType = 0; csSubLoc.label = ''; csZipcode.label = ''; } private function clickLocType (loctype:int):void { currentState='locsublocselected'; thisLocationType = loctype; thisLocationCode = ''; if (loctype == 1) { locws.getCounties.send(); subLocations.dataProvider = theCountiesList; } else if (loctype == 2) { locws.getCities.send(); subLocations.dataProvider = theCitiesList; } } private function changeSubLocation():void { if (thisLocationType == 1) { thisLocationCode = locStates.selectedItem.LOC_CODE + subLocations.selectedItem.LOC_CODE; } else if (thisLocationType == 2) { thisLocationCode = subLocations.selectedItem.LOC_CODE; } if (thisLocationType != 0) { locws.getZipcodes.send(); thisLocLabel = subLocations.selectedItem.LOC_NAME; csSubLoc.label = '> ' + subLocations.selectedItem.LOC_NAME; currentState='zipstate'; csZipcode.label = ''; } } private function setLocation():void { thisLocationType = 4; thisLocationCode = zipcodes.selectedItem.LOC_CODE; thisLocLabel = zipcodes.selectedItem.LOC_NAME; csZipcode.label = '> ' + zipcodes.selectedItem.FULL_NAME; } private function error():void { Alert.show("Error getting data... refresh the browser to try again.", "Error"); } ]]> </mx:Script> <mx:WebService id="locws" wsdl="{parentApplication.webServiceRootUrl}" useProxy="false" showBusyCursor="true" fault="error()"> <mx:operation name="getStates" /> <mx:operation name="getCounties"> <mx:request> <statecode>{locStates.selectedItem.LOC_CODE} </statecode> </mx:request> </mx:operation> <mx:operation name="getCities"> <mx:request> <statecode>{locStates.selectedItem.LOC_CODE} </statecode> </mx:request> </mx:operation> <mx:operation name="getZipcodes"> <mx:request> <loctype>{thisLocationType}</loctype> <loccode>{thisLocationCode}</loccode> </mx:request> </mx:operation> </mx:WebService> <mx:ArrayCollection id="theStatesList" source="{ArrayUtil.toArray(locws.getStates.lastResult)}" /> <mx:ArrayCollection id="theCountiesList" source="{ArrayUtil.toArray(locws.getCounties.lastResult)}" /> <mx:ArrayCollection id="theCitiesList" source="{ArrayUtil.toArray(locws.getCities.lastResult)}" /> <mx:ArrayCollection id="theZipcodeList" source="{ArrayUtil.toArray(locws.getZipcodes.lastResult)}" /> <mx:states> <mx:State name="locstateselected"> <mx:AddChild relativeTo="{hblocstates}" position="lastChild"> <mx:VBox> <mx:RadioButton label="View Counties" fontWeight="bold" id="vCountyRadio" click="clickLocType (1);"/> <mx:RadioButton label="View Cities" fontWeight="bold" id="vMetroRadio" click="clickLocType(2);"/> </mx:VBox> </mx:AddChild> <mx:AddChild relativeTo="{statsHome}" position="before"> <mx:VBox id="breadcrumb" width="100%" height="22"> <mx:HBox width="100%" verticalAlign="middle"> <mx:Label id="lbHist" fontWeight="bold" /> <mx:LinkButton id="csState" toolTip="Click to return to this view" click="changeState()" /> <mx:LinkButton id="csSubLoc" toolTip="Click to return to this view" click="changeSubLocation()" /> <mx:LinkButton id="csZipcode" enabled="false" /> </mx:HBox> </mx:VBox> </mx:AddChild> </mx:State> <mx:State name="locsublocselected" basedOn="locstateselected"> <mx:AddChild relativeTo="{hblocstates}" position="lastChild"> <mx:ComboBox id="subLocations" color="#000000" labelField="LOC_NAME" prompt="Select Location" change="changeSubLocation()" /> </mx:AddChild> </mx:State> <mx:State name="zipstate" basedOn="locsublocselected"> <mx:AddChild relativeTo="{hblocstates}" position="lastChild"> <mx:ComboBox id="zipcodes" color="#000000" labelField="FULL_NAME" dataProvider="{theZipcodeList}" prompt="Select Zip Code" change="setLocation()" /> </mx:AddChild> </mx:State> </mx:states> <mx:ApplicationControlBar id="mainControl" width="100%" height="50" verticalAlign="top" fillColors="[#6699CC, #6699CC]" fillAlphas="[1.0, 1.0]" color="#FFFFFF"> <mx:HBox id="hblocstates" width="100%"> <mx:ComboBox id="locStates" color="#000000" dataProvider="{theStatesList}" labelField="LOC_NAME" width="200" change="changeState()" prompt="Select State" /> </mx:HBox> <!-- <mx:HBox width="100%" horizontalAlign="right" height="50"> <mx:Label text="Search:"/> <mx:TextInput id="searchtext" width="100"/> <mx:Button label="Go" id="searchbutton"/> </mx:HBox> --> </mx:ApplicationControlBar> <mx:HBox id="statsHome" visible="false" width="100%" height="100%"> <mx:Panel id="menupanel" width="25%" height="100%" title="The Details" fontSize="12" borderColor="#6699CC" borderAlpha="1" color="#FFFFFF"> <mx:VBox> <mx:LinkButton label="Link Button 1" color="#000000" width="100%" /> <mx:LinkButton label="Link Button 2" color="#000000" width="100%" /> <mx:LinkButton label="Link Button 3" color="#000000" width="100%" /> <mx:LinkButton label="Link Button 4" color="#000000" width="100%" /> </mx:VBox> </mx:Panel> <mx:VBox width="75%" height="100%" id="statviewervbox"> <stat:home locationCode="{thisLocationCode}" locationType="{thisLocationType}" locLabel="{thisLocLabel}" /> </mx:VBox> </mx:HBox> </mx:VBox> ***** addtional comp so far ***** <?xml version="1.0" encoding="utf-8"?> <mx:VBox xmlns:mx="http://www.adobe.com/2006/mxml"; width="100%" height="100%"> <mx:Script> <![CDATA[ [Bindable] public var locationType:int = 0; [Bindable] public var locationCode:String = ''; [Bindable] public var locLabel:String = ''; ]]> </mx:Script> <mx:Label text="{locLabel}" /> <mx:Label text="{locationType}" /> <mx:Label text="{locationCode}" /> </mx:VBox>
