org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/dialogs/ErrorFeedback.java

   1 package org.argeo.eclipse.ui.dialogs;
   2
   3 import java.io.PrintWriter;
   4 import java.io.StringWriter;
   5
   6 import org.apache.commons.logging.Log;
   7 import org.apache.commons.logging.LogFactory;
   8 import org.eclipse.jface.dialogs.IMessageProvider;
   9 import org.eclipse.jface.dialogs.TitleAreaDialog;
  10 import org.eclipse.swt.SWT;
  11 import org.eclipse.swt.graphics.Point;
  12 import org.eclipse.swt.layout.GridData;
  13 import org.eclipse.swt.layout.GridLayout;
  14 import org.eclipse.swt.widgets.Composite;
  15 import org.eclipse.swt.widgets.Control;
  16 import org.eclipse.swt.widgets.Display;
  17 import org.eclipse.swt.widgets.Shell;
  18 import org.eclipse.swt.widgets.Text;
  19
  20 /** Generic error dialog to be used in try/catch blocks */
  21 public class ErrorFeedback extends TitleAreaDialog {
  22         private static final long serialVersionUID = -8918084784628179044L;
  23
  24         private final static Log log = LogFactory.getLog(ErrorFeedback.class);
  25
  26         private final String message;
  27         private final Throwable exception;
  28
  29         public static void show(String message, Throwable e) {
  30                 // rethrow ThreaDeath in order to make sure that RAP will properly clean
  31                 // up the UI thread
  32                 if (e instanceof ThreadDeath)
  33                         throw (ThreadDeath) e;
  34
  35                 new ErrorFeedback(newShell(), message, e).open();
  36         }
  37
  38         public static void show(String message) {
  39                 new ErrorFeedback(newShell(), message, null).open();
  40         }
  41
  42         private static Shell newShell() {
  43                 return new Shell(getDisplay(), SWT.NO_TRIM);
  44         }
  45
  46         /** Tries to find a display */
  47         private static Display getDisplay() {
  48                 try {
  49                         Display display = Display.getCurrent();
  50                         if (display != null)
  51                                 return display;
  52                         else
  53                                 return Display.getDefault();
  54                 } catch (Exception e) {
  55                         return Display.getCurrent();
  56                 }
  57         }
  58
  59         public ErrorFeedback(Shell parentShell, String message, Throwable e) {
  60                 super(parentShell);
  61                 setShellStyle(SWT.NO_TRIM);
  62                 this.message = message;
  63                 this.exception = e;
  64                 log.error(message, e);
  65         }
  66
  67         protected Point getInitialSize() {
  68                 if (exception != null)
  69                         return new Point(800, 600);
  70                 else
  71                         return new Point(400, 300);
  72         }
  73
  74         @Override
  75         protected Control createDialogArea(Composite parent) {
  76                 Composite dialogarea = (Composite) super.createDialogArea(parent);
  77                 dialogarea.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  78                 Composite composite = new Composite(dialogarea, SWT.NONE);
  79                 composite.setLayout(new GridLayout(2, false));
  80                 composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  81
  82                 setMessage(message != null ? message + (exception != null ? ": " + exception.getMessage() : "")
  83                                 : exception != null ? exception.getMessage() : "Unkown Error", IMessageProvider.ERROR);
  84
  85                 if (exception != null) {
  86                         Text stack = new Text(composite, SWT.MULTI | SWT.LEAD | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
  87                         stack.setEditable(false);
  88                         stack.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  89                         StringWriter sw = new StringWriter();
  90                         exception.printStackTrace(new PrintWriter(sw));
  91                         stack.setText(sw.toString());
  92                 }
  93
  94                 parent.pack();
  95                 return composite;
  96         }
  97
  98         protected void configureShell(Shell shell) {
  99                 super.configureShell(shell);
 100                 shell.setText("Error");
 101         }
 102 }