<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="initVars()" viewSourceURL="srcview/index.html">
<mx:Script>
????????<![CDATA[
????????????import mx.rpc.events.ResultEvent;
????????????import mx.controls.Alert;
????????????import mx.collections.ArrayCollection;
????????????
????????//holds all the records in the query returned by the CFC function????
????????private var submissionsAllAryCol:ArrayCollection;
????????
????????//holds all the records in an Array
????????//so we can use Array methods to
????????//get a subset of the records for paging
????????private var submissionsAllAry:Array;
????????
????????//The subset of the records for the current page
????????private var submissionsSlicedAry:Array;
????????
????????//The subset of the records in the ArrayCollection
????????//that is the dataprovider for the datagrid
????????[Bindable]
????????private var submissionsViewAryCol:ArrayCollection;
????????
????????[Bindable]
????????private var start:int; //what record to start with on the current page
????????
????????private var increment:int ; //how many records to show per page
????????
????????[Bindable]
????????private var end:int ; //what record (end-1) to end with on the current page
????????
????????[Bindable]
????????private var total:int ; //how many total records
????????
????????
??????
????????
????????// initialize the variables and get all submissions
????????private function initVars():void {
????????????
????????????//initial start and end positions for slicing the Array
????????????start = 0;
????????????increment = 10; //how many records to display
????????????end = 0;
????????????????????
?????????? //Call the CFC method to get the submissions????????
?????????? myService.getAllSubmissions(139);
????????
????????}??//end function initVars()????
????????????
???????? /*Handles the result returned by calling the getAllSubmissions method
????????????of the CFC
????????????*/
????????????public function handleQueryResult(event:ResultEvent):void{
????????????????
????????????????//place the query results into an ArrayCollection
????????????????submissionsAllAryCol = event.result as ArrayCollection;
????????????????
????????????????//convert ArrayCollection to a standard Array
????????????????//so we can use Array slice function
????????????????submissionsAllAry = submissionsAllAryCol.toArray();
????????????????
????????????????//how many total submissions?
????????????????total = submissionsAllAry.length;
????????????????
????????????????//determine initial value for end (cannot exceed total)
????????????????
????????????????if ( total < increment) {
????????????????????
????????????????????end = total;
????????????????????
????????????????} else {
????????????????????
????????????????????end = increment ;
????????????????????
????????????????}//end if
????????????????
????????????????
????????????????//take out of the array records start to end (includes records from start to end-1)
????????????????submissionsSlicedAry = submissionsAllAry.slice(start, end);
????????????????
????????????????//Create an ArrayCollection using the subset of our Array
????????????????//and assign it to the data provider for the datagrid
????????????????submissionsViewAryCol = new ArrayCollection( submissionsSlicedAry );
????????????????
????????????????//determine if Next button should be enabled
????????????????//as its possible that the number or records returned
????????????????//is less than our number per page (increment)
????????????????nextBtn.enabled = isNextBtnEnabled();
????????????????
????????????????????
????????????} //end function
????????????????
????????????/*Get the next increment of records for display in the datagrid
????????????*/
????????????private function getNext():void {
????????????????
????????????????//going forward so
????????????????//increase start and end by the increment
????????????????
????????????????start = start + increment ;
????????????????end = end + increment ;
????????????????
????????????????//don't let the value of end be larger than the
????????????????//total number of records
????????????????if (end > total) {
????????????????????
????????????????????end = total;
????????????????????
????????????????}
????????????????
????????????????//create a subset of the Array that is holding all the submissions
????????????????submissionsSlicedAry = submissionsAllAry.slice(start, end);
????????????????
????????????????//update the dataprovider for the datagrid
????????????????submissionsViewAryCol = new ArrayCollection( submissionsSlicedAry );
????????????????
????????????????//determine if Next button should be enabled
????????????????
????????????????nextBtn.enabled = isNextBtnEnabled();
????????????????
????????????????//enable previous button
????????????????//since we have gone to a next page of records
????????????????previousBtn.enabled = true;
????????????????
????????????????
????????????}//end getNext
????????????
??????????
?????????? /*Get the previous increment of records for display in the datagrid
?????????? */
?????????? private function getPrevious():void {
??????????????
????????????????
?????????????????? //going backwards
?????????????????? end = start;
????????????????
????????????????//decrease start by the increment
????????????????
????????????????start = start - increment ;
????????????????
????????????????//create a subset of the Array that is holding all the submissions
????????????????submissionsSlicedAry = submissionsAllAry.slice(start, end);
????????????????
????????????????//update the dataprovider for the datagrid
????????????????submissionsViewAryCol = new ArrayCollection( submissionsSlicedAry );
????????????????
????????????????//determine if previous button should be enabled
????????????????previousBtn.enabled = isPreviousBtnEnabled();
????????????????
????????????????//enable next button
????????????????//since we have gone to a previous page of records
????????????????nextBtn.enabled = true;
????????????????
????????????????
????????????}//end getPrevious
????????????
????????????/*Return true if button should be enabled
????????????*/
????????????private function isNextBtnEnabled():Boolean {
????????????????
????????????????var enableBtn:Boolean = false ;
????????????????
????????????????if ( end < total ) {
????????????????????
????????????????????enableBtn = true ;
????????????????????
????????????????}
????????????????
????????????????return enableBtn;
????????????
????????????????
????????????}//end function isNextBtnEnabled
????????????
????????????
????????????/*Return true if button should be enabled
????????????*/
????????????
????????????private function isPreviousBtnEnabled():Boolean {
????????????????
????????????????var enableBtn:Boolean = false ;
????????????????
????????????????if ( start >= increment ) {
????????????????????
????????????????????enableBtn = true ;
????????????????????
????????????????}
????????????????
????????????????return enableBtn;
????????????????
????????????????
????????????????
????????????}//end function isNextBtnEnabled
????????????
????????????
????????]]>
</mx:Script>????????????
????????????
????<!--setup connection to the CFC-->
????<mx:RemoteObject
????????id="myService"
????????destination="ColdFusion"
????????source="flex.pagingdatagrid.SubmissionsGateway"
????????showBusyCursor="true"
????????>??
????????????<mx:method name="getAllSubmissions" result="handleQueryResult(event)"
????????????fault="Alert.show(event.fault.message)"/>
????????????????
????</mx:RemoteObject>
????
????<!--setup user interface-->
????<mx:Panel width="80%" height="80%" layout="vertical" title="Page Through The Submissions"
????????horizontalAlign="center" verticalAlign="top">
????????
????????<mx:VBox width="100%" height="100%" verticalAlign="top" horizontalAlign="left">
????????
????????<mx:Label text="Use the Previous and Next buttons to Get More Submissions"/>
????????
????????<mx:HBox width="100%">
????????????
????????????<!--this button's enable value will be changed by the getPrevious() and getNext functions-->
????????????<mx:Button label="Previous" id="previousBtn" enabled="false"
????????????????click="getPrevious()"/>
????????????????
????????????<mx:Spacer width="50%"/>
????????????
????????????<!--must use start+1 since array elements start at array position 0-->
????????????<mx:Label text="Viewing Submissions {start+1} - {end} of {total} Submissions" />
????????????
????????????<mx:Spacer width="50%"/>
????????????
???????????? <!--this button's enable value will be changed by the getPrevious() and getNext functions-->
????????????<mx:Button label="Next" id="nextBtn" enabled="true"
????????????????click="getNext()"/>
????????????
????????</mx:HBox>
????????
????????<!--The dataProvider will be updated each time the user clicks the next and previous buttons-->????
????????<mx:DataGrid width="100%" height="100%" id="submissionsDG" dataProvider="{submissionsViewAryCol}"
????????????fontFamily="Verdana" fontSize="10">
????????????<mx:columns>
????????????????<mx:DataGridColumn dataField="submissionid" width="80" headerText="Sub #"/>
????????????
????????????????<mx:DataGridColumn dataField="presenter" width="100" headerText="Main Presenter" />
????????????????
????????????????<mx:DataGridColumn dataField="title" width="220" headerText="Title" wordWrap="true"/>
????????????</mx:columns>
????????</mx:DataGrid>
????????????
????????</mx:VBox>
????????
????</mx:Panel>
?? <!--setup user interface-->
</mx:Application>