swt/org.argeo.cms.swt/src/org/argeo/cms/swt/dialogs/CmsFeedback.java

   1 package org.argeo.cms.swt.dialogs;
   2
   3 import java.io.IOException;
   4 import java.io.PrintWriter;
   5 import java.io.StringWriter;
   6
   7 import org.argeo.api.cms.CmsLog;
   8 import org.argeo.cms.CmsMsg;
   9 import org.argeo.cms.swt.Selected;
  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.Button;
  15 import org.eclipse.swt.widgets.Composite;
  16 import org.eclipse.swt.widgets.Control;
  17 import org.eclipse.swt.widgets.Display;
  18 import org.eclipse.swt.widgets.Label;
  19 import org.eclipse.swt.widgets.Shell;
  20 import org.eclipse.swt.widgets.Text;
  21
  22 /** A dialog feedback based on a {@link LightweightDialog}. */
  23 public class CmsFeedback extends LightweightDialog {
  24         private final static CmsLog log = CmsLog.getLog(CmsFeedback.class);
  25
  26         private String message;
  27         private Throwable exception;
  28
  29         private Text stack;
  30
  31         private CmsFeedback(Shell parentShell, String message, Throwable e) {
  32                 super(parentShell);
  33                 this.message = message;
  34                 this.exception = e;
  35         }
  36
  37         public static CmsFeedback error(String message, Throwable e) {
  38                 // rethrow ThreaDeath in order to make sure that RAP will properly clean
  39                 // up the UI thread
  40                 if (e instanceof ThreadDeath)
  41                         throw (ThreadDeath) e;
  42
  43                 log.error(message, e);
  44                 try {
  45                         Display display = LightweightDialog.findDisplay();
  46
  47                         CmsFeedback current = (CmsFeedback) display.getData(CmsFeedback.class.getName());
  48                         if (current != null) {// already one open
  49                                 current.append("");
  50                                 if (message != null)
  51                                         current.append(message);
  52                                 if (e != null)
  53                                         current.append(e);
  54                                 // FIXME set a limit to the size of the text
  55                                 return current;
  56                         }
  57
  58                         CmsFeedback cmsFeedback = new CmsFeedback(null, message, e);
  59                         cmsFeedback.setBlockOnOpen(false);
  60                         cmsFeedback.open();
  61                         cmsFeedback.getDisplay().setData(CmsFeedback.class.getName(), cmsFeedback);
  62                         return cmsFeedback;
  63                 } catch (Throwable e1) {
  64                         log.error("Cannot open error feedback (" + e.getMessage() + "), original error below", e);
  65                         return null;
  66                 }
  67         }
  68
  69         public static CmsFeedback show(String message) {
  70                 CmsFeedback cmsFeedback = new CmsFeedback(null, message, null);
  71                 cmsFeedback.open();
  72                 return cmsFeedback;
  73         }
  74
  75         protected Control createDialogArea(Composite parent) {
  76                 parent.setLayout(new GridLayout(2, false));
  77
  78                 Label messageLbl = new Label(parent, SWT.WRAP);
  79                 messageLbl.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
  80                 if (message != null)
  81                         messageLbl.setText(message);
  82                 else if (exception != null)
  83                         messageLbl.setText(exception.getLocalizedMessage());
  84
  85                 Button close = new Button(parent, SWT.FLAT);
  86                 close.setText(CmsMsg.close.lead());
  87                 close.setLayoutData(new GridData(SWT.END, SWT.TOP, false, false));
  88                 close.addSelectionListener((Selected) (e) -> closeShell(OK));
  89
  90                 if (exception != null) {
  91                         stack = new Text(parent, SWT.MULTI | SWT.LEAD | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
  92                         stack.setEditable(false);
  93                         stack.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
  94                         append(exception);
  95                 }
  96                 return messageLbl;
  97         }
  98
  99         protected Point getInitialSize() {
 100                 if (exception != null)
 101                         return new Point(800, 600);
 102                 else
 103                         return new Point(600, 400);
 104         }
 105
 106         protected void append(String message) {
 107                 stack.append(message);
 108                 stack.append("\n");
 109         }
 110
 111         protected void append(Throwable exception) {
 112                 try (StringWriter sw = new StringWriter()) {
 113                         exception.printStackTrace(new PrintWriter(sw));
 114                         stack.append(sw.toString());
 115                 } catch (IOException e) {
 116                         // ignore
 117                 }
 118
 119         }
 120
 121         @Override
 122         protected void onClose() {
 123                 getDisplay().setData(CmsFeedback.class.getName(), null);
 124         }
 125
 126 }