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.argeo.cms.ux.widgets.CmsDialog;
  11 import org.eclipse.swt.SWT;
  12 import org.eclipse.swt.graphics.Point;
  13 import org.eclipse.swt.layout.GridData;
  14 import org.eclipse.swt.layout.GridLayout;
  15 import org.eclipse.swt.widgets.Button;
  16 import org.eclipse.swt.widgets.Composite;
  17 import org.eclipse.swt.widgets.Control;
  18 import org.eclipse.swt.widgets.Display;
  19 import org.eclipse.swt.widgets.Label;
  20 import org.eclipse.swt.widgets.Shell;
  21 import org.eclipse.swt.widgets.Text;
  22
  23 /** A dialog feedback based on a {@link LightweightDialog}. */
  24 public class CmsFeedback extends LightweightDialog {
  25         private final static CmsLog log = CmsLog.getLog(CmsFeedback.class);
  26
  27         private String message;
  28         private Throwable exception;
  29
  30         private Text stack;
  31
  32         private CmsFeedback(Shell parentShell, String message, Throwable e) {
  33                 super(parentShell);
  34                 this.message = message;
  35                 this.exception = e;
  36         }
  37
  38         public static CmsFeedback error(String message, Throwable e) {
  39                 // rethrow ThreaDeath in order to make sure that RAP will properly clean
  40                 // up the UI thread
  41                 if (e instanceof ThreadDeath)
  42                         throw (ThreadDeath) e;
  43
  44                 log.error(message, e);
  45                 try {
  46                         Display display = LightweightDialog.findDisplay();
  47
  48                         CmsFeedback current = (CmsFeedback) display.getData(CmsFeedback.class.getName());
  49                         if (current != null) {// already one open
  50                                 current.append("");
  51                                 if (message != null)
  52                                         current.append(message);
  53                                 if (e != null)
  54                                         current.append(e);
  55                                 // FIXME set a limit to the size of the text
  56                                 return current;
  57                         }
  58
  59                         CmsFeedback cmsFeedback = new CmsFeedback(null, message, e);
  60                         cmsFeedback.setBlockOnOpen(false);
  61                         cmsFeedback.open();
  62                         cmsFeedback.getDisplay().setData(CmsFeedback.class.getName(), cmsFeedback);
  63                         return cmsFeedback;
  64                 } catch (Throwable e1) {
  65                         log.error("Cannot open error feedback (" + e.getMessage() + "), original error below", e);
  66                         return null;
  67                 }
  68         }
  69
  70         public static CmsFeedback show(String message) {
  71                 CmsFeedback cmsFeedback = new CmsFeedback(null, message, null);
  72                 cmsFeedback.open();
  73                 return cmsFeedback;
  74         }
  75
  76         protected Control createDialogArea(Composite parent) {
  77                 parent.setLayout(new GridLayout(2, false));
  78
  79                 Label messageLbl = new Label(parent, SWT.WRAP);
  80                 messageLbl.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
  81                 if (message != null)
  82                         messageLbl.setText(message);
  83                 else if (exception != null)
  84                         messageLbl.setText(exception.getLocalizedMessage());
  85
  86                 Button close = new Button(parent, SWT.FLAT);
  87                 close.setText(CmsMsg.close.lead());
  88                 close.setLayoutData(new GridData(SWT.END, SWT.TOP, false, false));
  89                 close.addSelectionListener((Selected) (e) -> closeShell(CmsDialog.OK));
  90
  91                 if (exception != null) {
  92                         stack = new Text(parent, SWT.MULTI | SWT.LEAD | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
  93                         stack.setEditable(false);
  94                         stack.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));
  95                         append(exception);
  96                 }
  97                 return messageLbl;
  98         }
  99
 100         protected Point getInitialSize() {
 101                 if (exception != null)
 102                         return new Point(800, 600);
 103                 else
 104                         return new Point(600, 400);
 105         }
 106
 107         protected void append(String message) {
 108                 stack.append(message);
 109                 stack.append("\n");
 110         }
 111
 112         protected void append(Throwable exception) {
 113                 try (StringWriter sw = new StringWriter()) {
 114                         exception.printStackTrace(new PrintWriter(sw));
 115                         stack.append(sw.toString());
 116                 } catch (IOException e) {
 117                         // ignore
 118                 }
 119
 120         }
 121
 122         @Override
 123         protected void onClose() {
 124                 getDisplay().setData(CmsFeedback.class.getName(), null);
 125         }
 126
 127 }