Name: clC74495 Date: 02/18/99


Component.printAll() takes a Graphics object, creates a new one,
and calls either lightweightPrint() or peer.print(). Problem
is, printAll() passes the original Graphics object, not the new
one... [ ALSO HAPPENS IN JDK1.2 ]

  From Component.java...

  public void printAll(Graphics g) {
    ComponentPeer peer = this.peer;
    if (visible && (peer != null)) {
      validate();
      Graphics cg = g.create(0, 0, width, height);
      cg.setFont(getFont());
      try {
        if (peer instanceof java.awt.peer.LightweightPeer) {
          lightweightPrint(g); /*** ERROR ***/
        }
        else {
          peer.print(g); /*** ERROR ***/
        }
      } finally {
        cg.dispose();
      }
    }
  }

This is a problem because while 'cg' contains a valid clipRect,
'g' does not. Lightweight code calling g.getClipRect() will get
a null Rectangle unless the correct Graphics object is passed
down the chain.
(Review ID: 54316)
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Name: skT88420 Date: 05/20/99


Trying to print JFrame derived class,
printAll() throws NullPointerException.

Using JDK1.1.6, Swing 1.03, Netscape 4.5X/4.6
[which JavaVM supports 1.1.5) on NT4sp3.



java.lang.NullPointerException

  at java.awt.Rectangle.intersects(Compiled Code)

  at java.awt.Container.print(Compiled Code)

  at sun.awt.windows.WCanvasPeer.print(Compiled Code)

  at sun.awt.windows.WPanelPeer.print(Compiled Code)

  at java.awt.Component.printAll(Compiled Code)

  at VyGuiCommon.FormMgr.printForm(Compiled Code)

  at VyGuiCommon.ActionEventHandler.actionPerformed(Compiled Code)

  at com.sun.java.swing.AbstractButton.fireActionPerformed(Compiled Code)

  at com.sun.java.swing.AbstractButton$ForwardActionEvents.actionPerformed(Compiled Code)

  at com.sun.java.swing.DefaultButtonModel.fireActionPerformed(Compiled Code)

  at com.sun.java.swing.DefaultButtonModel.setPressed(Compiled Code)

  at com.sun.java.swing.plaf.basic.BasicButtonListener.mouseReleased(Compiled Code)

  at java.awt.Component.processMouseEvent(Compiled Code)

  at java.awt.Component.processEvent(Compiled Code)

  at java.awt.Container.processEvent(Compiled Code)

  at java.awt.Component.dispatchEventImpl(Compiled Code)

  at java.awt.Container.dispatchEventImpl(Compiled Code)

  at java.awt.Component.dispatchEvent(Compiled Code)

  at java.awt.LightweightDispatcher.retargetMouseEvent(Compiled Code)

  at java.awt.LightweightDispatcher.processMouseEvent(Compiled Code)

  at java.awt.LightweightDispatcher.dispatchEvent(Compiled Code)

  at java.awt.Container.dispatchEventImpl(Compiled Code)

  at java.awt.Window.dispatchEventImpl(Compiled Code)

* at java.awt.Component.dispatchEvent(Compiled Code)

  at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)

  at java.awt.EventDispatchThread.run(Compiled Code)

  at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled Code)

   Deactivate:java.awt.event.WindowEvent[WINDOW_DEACTIVATED] on frame6

   Leaving fieldVyGuiCommon.VyButton[Print,342,4,41x63,layout=com.sun.java.swing.OverlayLayout]



Source code below:

public void printForm()
    {
        try {
            System.out.println("** Install NETSCAPE SEC PrintJob Privilege ***");
            netscape.security.PrivilegeManager.enablePrivilege("UniversalPrintJobAccess");
            System.out.println("Enabled PrintJob");
        } catch (Exception ex) {
            System.out.println("printForm Ex:"+ex);
            return;
        }
        if (frame == null)
        {
            VyTrace.print(2,"Frame not set");
            return;
        }

        if (_applet == null)
        {
            //VyTrace.print(2,"Applet not set");
            return;
        }

        PrintJob printJob = null;
        printJob = _applet.getToolkit().getPrintJob(frame,"Print Screen",null);
        if (printJob != null) {
            //vyTrace.print(2,"get Screen");
            Graphics screen = printJob.getGraphics();
            if (screen != null) {
                //VyTrace.print(1,"Print screen");
                 
                try {
                   frame.printAll(screen);

                   System.out.println("PrintAll done");
                } catch (Exception ex)
                   { System.out.println("Exception: "+ex); }
                
                screen.dispose();
               
            }
            printJob.end();
        }
        else {
            System.out.println("printJob is null ********** Cannot print. Make sure a printer is defined");
        }

    }
(Review ID: 83310)
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