Error.java

   1 package org.argeo.eclipse.ui;
   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 import org.eclipse.ui.PlatformUI;
  20
  21 /** Generic error dialog to be used in try/catch blocks */
  22 public class Error extends TitleAreaDialog {
  23         private final static Log log = LogFactory.getLog(Error.class);
  24
  25         private final String message;
  26         private final Throwable exception;
  27
  28         public static void show(String message, Throwable e) {
  29                 new Error(getDisplay().getActiveShell(), message, e).open();
  30         }
  31
  32         public static void show(String message) {
  33                 new Error(getDisplay().getActiveShell(), message, null).open();
  34         }
  35
  36         /** Tries to find a display */
  37         private static Display getDisplay() {
  38                 try {
  39                         return PlatformUI.getWorkbench().getDisplay();
  40                 } catch (Exception e) {
  41                         return Display.getCurrent();
  42                 }
  43         }
  44
  45         public Error(Shell parentShell, String message, Throwable e) {
  46                 super(parentShell);
  47                 this.message = message;
  48                 this.exception = e;
  49                 log.error(message, e);
  50         }
  51
  52         protected Point getInitialSize() {
  53                 if (exception != null)
  54                         return new Point(800, 600);
  55                 else
  56                         return new Point(400, 300);
  57         }
  58
  59         @Override
  60         protected Control createDialogArea(Composite parent) {
  61                 Composite dialogarea = (Composite) super.createDialogArea(parent);
  62                 dialogarea.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  63                 Composite composite = new Composite(dialogarea, SWT.NONE);
  64                 composite.setLayout(new GridLayout(2, false));
  65                 composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  66
  67                 setMessage(message != null ? message
  68                                 + (exception != null ? ": " + exception.getMessage() : "")
  69                                 : exception != null ? exception.getMessage() : "Unkown Error",
  70                                 IMessageProvider.ERROR);
  71
  72                 if (exception != null) {
  73                         Text stack = new Text(composite, SWT.MULTI | SWT.LEAD | SWT.BORDER
  74                                         | SWT.V_SCROLL | SWT.H_SCROLL);
  75                         stack.setEditable(false);
  76                         stack.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  77                         StringWriter sw = new StringWriter();
  78                         exception.printStackTrace(new PrintWriter(sw));
  79                         stack.setText(sw.toString());
  80                 }
  81
  82                 parent.pack();
  83                 return composite;
  84         }
  85
  86         protected void configureShell(Shell shell) {
  87                 super.configureShell(shell);
  88                 shell.setText("Error");
  89         }
  90
  91 }