如果我在UIComponent.filters属性中指定过滤器，它们在屏幕上显示正常，但是当我通过FlexPrintJob打印它们时会被忽略。
我尝试过DropshadowFilter，BlurFilter，BevelFilter。他们都没有出现。我尝试了所有的bitmapCaching模式。还有printAsBitmap。
您可以通过转到ASDoc for FlexPrintJob中的示例来尝试。只需为某些打印组件指定过滤器即可。
你能告诉我怎么做吗？
我在第一个文件中放了一个过滤器：
enter code here
FormPrintHeader.mxml
<?xml version="1.0"?>
<!-- Custom control for the header area of the printed page. -->
<s:VGroup name="FormPrintHeader"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="60%"
horizontalAlign="right" filters="{[new spark.filters.BlurFilter]}">
<s:Label text="This is a placeholder for first page contents"/>
</s:VGroup>
FormPrintFooter.mxml
<?xml version="1.0"?>
<!-- Custom control for the footer area of the printed page. -->
<s:VGroup name="FormPrintFooter"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="60%"
horizontalAlign="right" >
<!-- Declare and initialize the product total variable. -->
<fx:Script>
<![CDATA[
[Bindable]
public var pTotal:Number = 0;
]]>
</fx:Script>
<s:Label text="Product Total: {pTotal}"/>
</s:VGroup>
FormPrintView.mxml
<?xml version="1.0"?>
<!-- Custom control to print the Halo DataGrid control on multiple pages. -->
<s:VGroup name="FormPrintView"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns="*">
<fx:Script>
<![CDATA[
import mx.core.*;
// Declare and initialize the variables used in the component.
// The application sets the actual prodTotal value.
[Bindable]
public var pageNumber:Number = 1;
[Bindable]
public var prodTotal:Number = 0;
// Control the page contents by selectively hiding the header and
// footer based on the page type.
public function showPage(pageType:String):void {
if (pageType == "first" || pageType == "middle") {
// Hide the footer.
footer.includeInLayout = false;
footer.visible = false;
}
if (pageType == "middle" || pageType == "last") {
// The header won't be used again; hide it.
header.includeInLayout = false;
header.visible = false;
}
if (pageType == "last") {
// Show the footer.
footer.includeInLayout = true;
footer.visible = true;
}
//Update the DataGrid layout to reflect the results.
validateNow();
}
]]>
</fx:Script>
<!-- The template for the printed page, with the contents for all pages. -->
<s:VGroup width="80%" horizontalAlign="left">
<s:Label text="Page {pageNumber}"/>
</s:VGroup>
<FormPrintHeader id="header" />
<!-- The data grid. The sizeToPage property is true by default, so the last
page has only as many grid rows as are needed for the data. -->
<mx:PrintDataGrid id="myDataGrid" width="60%" height="100%">
<!-- Specify the columns to ensure that their order is correct. -->
<mx:columns>
<mx:DataGridColumn dataField="Index" />
<mx:DataGridColumn dataField="Qty" />
</mx:columns>
</mx:PrintDataGrid>
<!-- Create a FormPrintFooter control and set its prodTotal variable. -->
<FormPrintFooter id="footer" pTotal="{prodTotal}" />
</s:VGroup>
PrintDataGridExample.mxml
<?xml version="1.0"?>
<!-- Main application to print a Halo DataGrid control on multiple pages. -->
<s:Application name="PrintDataGridExample.mxml"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
initialize="initData();">
<fx:Script>
<![CDATA[
import mx.printing.*;
import mx.collections.ArrayCollection;
import FormPrintView;
import mx.core.FlexGlobals;
// Declare variables and initialize simple variables.
[Bindable]
public var dgProvider:ArrayCollection;
public var footerHeight:Number = 20;
public var prodIndex:Number;
public var prodTotal:Number = 0;
// Data initialization.
public function initData():void {
// Create the data provider for the DataGrid control.
dgProvider = new ArrayCollection;
}
// Fill the dgProvider ArrayCollection with the specified items.
public function setdgProvider(items:int):void {
prodIndex=1;
dgProvider.removeAll();
for (var z:int=0; z<items; z++) {
var prod1:Object = {};
prod1.Qty = prodIndex * 7;
prod1.Index = prodIndex++;
prodTotal += prod1.Qty;
dgProvider.addItem(prod1);
}
}
// The function to print the output.
public function doPrint():void {
var printJob:FlexPrintJob = new FlexPrintJob();
if (printJob.start()) {
// Create a FormPrintView control as a child of the current view.
var thePrintView:FormPrintView = new FormPrintView();
FlexGlobals.topLevelApplication.addElement(thePrintView);
//Set the print view properties.
thePrintView.width=printJob.pageWidth;
thePrintView.height=printJob.pageHeight;
thePrintView.prodTotal = prodTotal;
// Set the data provider of the FormPrintView component's data grid
// to be the data provider of the displayed data grid.
thePrintView.myDataGrid.dataProvider = myDataGrid.dataProvider;
// Create a single-page image.
thePrintView.showPage("single");
// If the print image's data grid can hold all the provider's rows,
// add the page to the print job.
if (!thePrintView.myDataGrid.validNextPage) {
printJob.addObject(thePrintView);
}
// Otherwise, the job requires multiple pages.
else {
// Create the first page and add it to the print job.
thePrintView.showPage("first");
printJob.addObject(thePrintView);
thePrintView.pageNumber++;
// Loop through the following code until all pages are queued.
while (true) {
// Move the next page of data to the top of the print grid.
thePrintView.myDataGrid.nextPage();
thePrintView.showPage("last");
// If the page holds the remaining data, or if the last page
// was completely filled by the last grid data, queue it for printing.
// Test if there is data for another PrintDataGrid page.
if (!thePrintView.myDataGrid.validNextPage) {
// This is the last page; queue it and exit the print loop.
printJob.addObject(thePrintView);
break;
} else {
// This is not the last page. Queue a middle page.
thePrintView.showPage("middle");
printJob.addObject(thePrintView);
thePrintView.pageNumber++;
}
}
}
// All pages are queued; remove the FormPrintView control to free memory.
FlexGlobals.topLevelApplication.removeElement(thePrintView);
}
// Send the job to the printer.
printJob.send();
}
]]>
</fx:Script>
<s:Panel title="DataGrid Printing Example"
width="75%" height="75%"
horizontalCenter="0" verticalCenter="0">
<s:VGroup left="10" right="10" top="10" bottom="10">
<mx:DataGrid id="myDataGrid" dataProvider="{dgProvider}">
<mx:columns>
<mx:DataGridColumn dataField="Index"/>
<mx:DataGridColumn dataField="Qty"/>
</mx:columns>
</mx:DataGrid>
<s:Label width="100%" color="blue"
text="Specify the number of lines and click Fill Grid first. Then you can click Print."/>
<s:TextInput id="dataItems" text="35"/>
<s:HGroup>
<s:Button id="setDP" label="Fill Grid" click="setdgProvider(int(dataItems.text));"/>
<s:Button id="printDG" label="Print" click="doPrint();"/>
</s:HGroup>
</s:VGroup>
</s:Panel>
</s:Application>
答案 0 :(得分：1)
请使用以下代码修改您的FormPrintHeader.mxml： -
<?xml version="1.0"?>
<!-- Custom control for the header area of the printed page. -->
<s:VGroup name="FormPrintHeader"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="60%"
horizontalAlign="right" xmlns:mx="library://ns.adobe.com/flex/mx"
filters="{[new flash.filters.BlurFilter()]}" creationComplete="addHeaderPrinting(this)">
<fx:Script>
<![CDATA[
import flash.filters.BlurFilter;
import mx.graphics.ImageSnapshot;
private function addHeaderPrinting(source:IBitmapDrawable):void {
var imageBitmapData:BitmapData = ImageSnapshot.captureBitmapData(source);
swfLoader.source = new Bitmap(imageBitmapData);
mylblPrint.includeInLayout = mylblPrint.visible = false;
}
]]>
</fx:Script>
<mx:Label id="mylblPrint"
text="This is a placeholder for first page contents. This is a placeholder for first page contents"/>
<mx:SWFLoader id="swfLoader" >
<mx:filters>
<mx:BlurFilter />
</mx:filters>
</mx:SWFLoader>
</s:VGroup>
希望这可以帮助你。