Re: [platform-swt-dev] Printing a composite widget

[Felipe Heidrich <Felipe_Heidrich@xxxxxxxxxx>]

See 
http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/faq.html#noprintimage

Your code fails cause it creates two Displays in the same thread.

For user question please use the swt newsgroup:
http://www.eclipse.org/newsgroups/index.html

Thanks
Felipe





Jörgen Ekström <jorgen.ekstrom@xxxxxxxxxxxx> 
Sent by: platform-swt-dev-admin@xxxxxxxxxxx
08/23/2004 02:51 AM
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[platform-swt-dev] Printing a composite widget






Hi All,
 
Can someone help me how to print a composite and hence utilize the layout 
capabilities in swt? 
In the printing examples I?ve looked at, a GC is created and all ?layout? 
is handled manually. I have a 
number of charts which are layout using GridLayout which I would like to 
print as they appear on screen.
 
I tried the following code (see below) but got a Thread Access Error when 
creating the Display. The Action is a simple
menu action called within the UI thread.
 
I would appreciate any help or hints! Thanks!
 
Jorgen E.
 
 
            ChartWindow chartWindow = (ChartWindow)window;
            int nbrPages = chartWindow.getNbrTabs();
            
            PrintDialog dialog = new PrintDialog(window.getShell(), 
SWT.NONE);
            dialog.setText("PrintDialogDemo");
            dialog.setScope(PrinterData.PAGE_RANGE);
            dialog.setStartPage(1);
            dialog.setEndPage(nbrPages);
            dialog.setPrintToFile(true);
            PrinterData printerData = dialog.open();
            if (printerData != null) {
            
                  Printer printer = new Printer(printerData);
                  //GC gc = new GC(printer);
                  DeviceData deviceData = printer.getDeviceData();
                  Display display = new Display(deviceData);
                  
                  printer.startJob("Chart");
 
                  printer.startPage();
                  Shell shell = new Shell(display);
 
                  ChartResources chartResources = new 
ChartResources(shell);
                  
                  int itemId[] = chartWindow.getItemId();
                  
                  GridLayout layout = new GridLayout();
                  layout.numColumns = 3;
                  layout.makeColumnsEqualWidth = true;
                  shell.setLayout(layout);
            
                  for (int i = 0; i < ItemId.length; i++) {
                        Chart chart = ChartKit.getChart(itemId[i], false, 
env);
                        ChartCanvas canvas = new ChartCanvas(chart, 
chartResources, shell, SWT.BORDER);
                        canvas.setLayoutData(new 
GridData(GridData.FILL_BOTH));
                  }
 
                  printer.endPage();
                  printer.endJob();
                  
                  printer.dispose();
            }
      }
 
 
org.eclipse.swt.SWTException: Invalid thread access
      at org.eclipse.swt.SWT.error(SWT.java:2691)
      at org.eclipse.swt.SWT.error(SWT.java:2616)
      at org.eclipse.swt.SWT.error(SWT.java:2587)
      at org.eclipse.swt.widgets.Display.checkDisplay(Display.java:568)
      at org.eclipse.swt.widgets.Display.create(Display.java:629)
      at org.eclipse.swt.graphics.Device.<init>(Device.java:99)
      at org.eclipse.swt.widgets.Display.<init>(Display.java:355)
      at com.finsys.tradeagent.chart.PrintAction.run(PrintAction.java:63)
      at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
      at 
org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:915)
      at 
org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:866)
      at 
org.eclipse.jface.action.ActionContributionItem$7.handleEvent(ActionContributionItem.java:785)
      at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
      at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
      at 
org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2772)
      at 
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2431)
      at org.eclipse.jface.window.Window.runEventLoop(Window.java:668)
      at org.eclipse.jface.window.Window.open(Window.java:648)
      at 
com.finsys.tradeagent.TradeAgentWindow.main(TradeAgentWindow.java:132)