Re: nsIWebBrowserPrint

Hi,

Iam trying to do a printPreview and then getPrintPreviewNumPages() ,
but it throws Execption.Did you succeed?

regards,
Krith

On Feb 2, 6:58 pm, [email protected] wrote:
> Hi!
> I use JavaXPCOM to embed gecko into an awt canvas. A print button
> should print the content.
> If I compile and run the java class found below, wait for mozilla.org
> to be rendered inside the canvas and then press the print button,
> nothing is printed.
> Sometimes (not always), a print dialog opens (but nothing happens
> after pressing "ok")
> Sometimes (not always) an exception is thrown:
>  org.mozilla.xpcom.XPCOMException: The function "print" returned an
> error condition  (0x80040111)
>
> Can anyone tell me what's wrong?
> Thanks in advance!
> hs
> -------------------------------------------
> package bugs;
>
> import java.awt.BorderLayout;
> import java.awt.Button;
> import java.awt.Canvas;
> import java.awt.Frame;
> import java.awt.event.ActionEvent;
> import java.awt.event.ActionListener;
> import java.io.File;
>
> import org.mozilla.xpcom.GREVersionRange;
> import org.mozilla.xpcom.IAppFileLocProvider;
> import org.mozilla.xpcom.Mozilla;
> import org.mozilla.xpcom.nsIAppStartup;
> import org.mozilla.xpcom.nsIBaseWindow;
> import org.mozilla.xpcom.nsIEventQueue;
> import org.mozilla.xpcom.nsIEventQueueService;
> import org.mozilla.xpcom.nsIInterfaceRequestor;
> import org.mozilla.xpcom.nsIProxyObjectManager;
> import org.mozilla.xpcom.nsIServiceManager;
> import org.mozilla.xpcom.nsIWebBrowser;
> import org.mozilla.xpcom.nsIWebBrowserPrint;
> import org.mozilla.xpcom.nsIWebNavigation;
>
> public class PrintTest extends Canvas {
>
>   private nsIWebBrowser webBrowser;
>
>   // used if no gre can be located automatically
>   public static String FALLBACK_GRE_PATH = "/path/to/xulrunner";
>
>   public static void main(String[] args) throws Exception {
>     // init gtk
>     // this line removes the warnings, but not the crash
>     // sun.awt.X11.XToolkit.checkGTK();
>
>     final PrintTest pt = new PrintTest();
>     Button bt = new Button("print");
>     bt.addActionListener(new ActionListener() {
>       public void actionPerformed(ActionEvent e) {
>         pt.print();
>       }
>     });
>     Frame frame = new Frame("PrintTest");
>     frame.setLayout(new BorderLayout());
>     frame.add(bt, BorderLayout.NORTH);
>     frame.add(pt, BorderLayout.CENTER);
>     frame.setBounds(100, 100, 400, 400);
>     frame.setVisible(true);
>     Thread.sleep(2000);
>     System.out.println("starting test...");
>     pt.test();
>   }
>
>   public void test() throws Exception {
>
>     Mozilla mozilla = Mozilla.getInstance();
>     GREVersionRange[] range = new GREVersionRange[1];
>     range[0] = new GREVersionRange("1.8.0", true, "1.9", false);
>
>     File grePath = Mozilla.getGREPathWithProperties(range, null);
>     if (null == grePath) grePath = new File(FALLBACK_GRE_PATH);
>     LocationProvider locProvider = new LocationProvider(grePath);
>     mozilla.initEmbedding(grePath, grePath, locProvider);
>
>     Mozilla moz = Mozilla.getInstance();
>
>     nsIServiceManager serviceManager = moz.getServiceManager();
>     nsIAppStartup appStartup = (nsIAppStartup)
> serviceManager.getServiceByContractID(
>       "@mozilla.org/toolkit/app-startup;1",
> nsIAppStartup.NS_IAPPSTARTUP_IID);
>
>     String NS_IWEBBROWSER_CID = "F1EAC761-87E9-11d3-
> AF80-00A024FFC08C"; //$NON-NLS-1$
>     this.webBrowser = (nsIWebBrowser)
> moz.getComponentManager().createInstance(NS_IWEBBROWSER_CID, null,
>       nsIWebBrowser.NS_IWEBBROWSER_IID);
>
>     nsIBaseWindow baseWindow = (nsIBaseWindow)
> webBrowser.queryInterface(nsIBaseWindow.NS_IBASEWINDOW_IID);
>
>     // long windowHandle = ((sun.awt.X11.XComponentPeer)
> getPeer()).getWindow();
>     long windowHandle = ((sun.awt.windows.WComponentPeer)
> getPeer()).getHWnd();
>
>     System.out.println("windowHandle " + windowHandle);
>     baseWindow.initWindow(windowHandle, 0, 0, 0, getWidth(),
> getHeight());
>     System.out.println("inited");
>     baseWindow.create();
>     System.out.println("created");
>     baseWindow.setVisibility(true);
>     nsIWebNavigation webNavigation = (nsIWebNavigation) webBrowser
>       .queryInterface(nsIWebNavigation.NS_IWEBNAVIGATION_IID);
>     webNavigation.loadURI("http://www.mozilla.org",
> nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE, null, null,
>       null);
>
>     appStartup.run();
>
>   }
>
>   public void print() {
>     Mozilla moz = Mozilla.getInstance();
>     nsIInterfaceRequestor ir = (nsIInterfaceRequestor) webBrowser
>       .queryInterface(nsIInterfaceRequestor.NS_IINTERFACEREQUESTOR_IID);
>     nsIWebBrowserPrint print = (nsIWebBrowserPrint) ir
>       .getInterface(nsIWebBrowserPrint.NS_IWEBBROWSERPRINT_IID);
>
>     nsIEventQueueService eventQueueServive = (nsIEventQueueService)
> moz.getServiceManager()
>       .getServiceByContractID("@mozilla.org/event-queue-service;1",
>         nsIEventQueueService.NS_IEVENTQUEUESERVICE_IID);
>     nsIEventQueue eventQueue = eventQueueServive
>       .getSpecialEventQueue(nsIEventQueueService.UI_THREAD_EVENT_QUEUE);
>     nsIProxyObjectManager proxyManager = (nsIProxyObjectManager)
> moz.getComponentManager()
>       .createInstanceByContractID("@mozilla.org/xpcomproxy;1", null,
>         nsIProxyObjectManager.NS_IPROXYOBJECTMANAGER_IID);
>     nsIWebBrowserPrint printProxy = (nsIWebBrowserPrint)
> proxyManager.getProxyForObject(eventQueue,
>       nsIWebBrowserPrint.NS_IWEBBROWSERPRINT_IID, print,
> nsIProxyObjectManager.INVOKE_SYNC);
>     printProxy.print(null, null);
>   }
>
>   public static class LocationProvider implements IAppFileLocProvider
> {
>     private final File libXULPath;
>     int counter = 0;
>
>     public LocationProvider(File grePath) {
>       this.libXULPath = grePath;
>     }
>
>     public File getFile(String aProp, boolean[] aPersistent) {
>       File file = null;
>       if (aProp.equals("GreD") || aProp.equals("GreComsD")) {
>         file = libXULPath;
>         if (aProp.equals("GreComsD")) {
>           file = new File(file, "components");
>         }
>       } else if (aProp.equals("MozBinD") || aProp.equals("CurProcD")
> || aProp.equals("ComsD")
>         || aProp.equals("ProfD")) {
>         file = libXULPath;
>         if (aProp.equals("ComsD")) {
>           file = new File(file, "components");
>         }
>       }
>       return file;
>     }
>
>     public File[] getFiles(String aProp) {
>       File[] files = null;
>       if (aProp.equals("APluginsDL")) {
>         files = new File[1];
>         files[0] = new File(libXULPath, "plugins");
>       }
>       return files;
>     }
>   }
>
> }