org.eclipse.tracecompass.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/dialogs/EnableChannelDialog.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2013 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann - Initial API and implementation
  11  *   Simon Delisle - Updated for support of LTTng Tools 2.2
  12  **********************************************************************/
  13 package org.eclipse.linuxtools.internal.lttng2.control.ui.views.dialogs;
  14
  15 import org.eclipse.jface.dialogs.Dialog;
  16 import org.eclipse.jface.dialogs.IDialogConstants;
  17 import org.eclipse.jface.dialogs.MessageDialog;
  18 import org.eclipse.linuxtools.internal.lttng2.control.core.model.IChannelInfo;
  19 import org.eclipse.linuxtools.internal.lttng2.control.core.model.impl.BufferType;
  20 import org.eclipse.linuxtools.internal.lttng2.control.core.model.impl.ChannelInfo;
  21 import org.eclipse.linuxtools.internal.lttng2.control.ui.Activator;
  22 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.messages.Messages;
  23 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.impl.TargetNodeComponent;
  24 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.impl.TraceDomainComponent;
  25 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.service.LTTngControlServiceConstants;
  26 import org.eclipse.swt.SWT;
  27 import org.eclipse.swt.events.FocusEvent;
  28 import org.eclipse.swt.events.FocusListener;
  29 import org.eclipse.swt.events.SelectionAdapter;
  30 import org.eclipse.swt.events.SelectionEvent;
  31 import org.eclipse.swt.events.VerifyEvent;
  32 import org.eclipse.swt.events.VerifyListener;
  33 import org.eclipse.swt.layout.GridData;
  34 import org.eclipse.swt.layout.GridLayout;
  35 import org.eclipse.swt.widgets.Button;
  36 import org.eclipse.swt.widgets.Composite;
  37 import org.eclipse.swt.widgets.Control;
  38 import org.eclipse.swt.widgets.Group;
  39 import org.eclipse.swt.widgets.Label;
  40 import org.eclipse.swt.widgets.Shell;
  41 import org.eclipse.swt.widgets.Text;
  42
  43 /**
  44  * <p>
  45  * Dialog box for collecting channel information when enabling a channel (which will be created).
  46  * </p>
  47  *
  48  * @author Bernd Hufmann
  49  */
  50 public class EnableChannelDialog extends Dialog implements IEnableChannelDialog {
  51
  52     // ------------------------------------------------------------------------
  53     // Constants
  54     // ------------------------------------------------------------------------
  55     /**
  56      * The icon file for this dialog box.
  57      */
  58     public static final String ENABLE_CHANNEL_ICON_FILE = "icons/elcl16/add_button.gif"; //$NON-NLS-1$
  59
  60     /**
  61      *  To indicate that the default value will be used for this field
  62      */
  63     private static final String DEFAULT_TEXT = "<" + Messages.EnableChannelDialog_DefaultMessage + ">"; //$NON-NLS-1$ //$NON-NLS-2$
  64
  65     // ------------------------------------------------------------------------
  66     // Attributes
  67     // ------------------------------------------------------------------------
  68     /**
  69      * The text widget for the channel name
  70      */
  71     private Text fChannelNameText = null;
  72     /**
  73      * The discard mode of the channel.
  74      */
  75     private Button fDiscardModeButton = null;
  76     /**
  77      * The overwrite mode of the channel.
  78      */
  79     private Button fOverwriteModeButton = null;
  80     /**
  81      * The sub-buffer size of the channel.
  82      */
  83     private Text fSubBufferSizeText = null;
  84     /**
  85      * The number of sub-buffers of the channel.
  86      */
  87     private Text fNumberOfSubBuffersText = null;
  88     /**
  89      * The switch timer interval of the channel.
  90      */
  91     private Text fSwitchTimerText = null;
  92     /**
  93      * The read timer interval of the channel.
  94      */
  95     private Text fReadTimerText = null;
  96     /**
  97      * Radio button for selecting kernel domain.
  98      */
  99     private Button fKernelButton = null;
 100     /**
 101      * Radio button for selecting UST domain.
 102      */
 103     private Button fUstButton = null;
 104     /**
 105      * The parent domain component where the channel node should be added.
 106      * Null in case of creation on session level.
 107      */
 108     private TraceDomainComponent fDomain = null;
 109     /**
 110      * The target node component
 111      */
 112     private TargetNodeComponent fTargetNodeComponent = null;
 113     /**
 114      * Common verify listener for numeric text input.
 115      */
 116     private VerifyListener fVerifyListener = null;
 117     /**
 118      * Common focus listener
 119      */
 120     private FocusListener fFocusListener = null;
 121     /**
 122      * Output channel information.
 123      */
 124     private IChannelInfo fChannelInfo = null;
 125     /**
 126      * Output domain information. True in case of Kernel domain. False for UST.
 127      */
 128     private boolean fIsKernel;
 129     /**
 130      *  Flag which indicates whether Kernel domain is available or not
 131      */
 132     private boolean fHasKernel;
 133     /**
 134      * Maximum size of trace files of the channel.
 135      */
 136     private Text fMaxSizeTraceText = null;
 137     /**
 138      * Maximum number of trace files of the channel.
 139      */
 140     private Text fMaxNumberTraceText = null;
 141     /**
 142      * CheckBox for selecting shared buffers (kernel onlyu).
 143      */
 144     private Button fSharedBuffersButton = null;
 145     /**
 146      * CheckBox for selecting per UID buffers.
 147      */
 148     private Button fPIDBuffersButton = null;
 149     /**
 150      * CheckBox for selecting per UID buffers.
 151      */
 152     private Button fUIDBuffersButton = null;
 153     /**
 154      * CheckBox to configure metadata channel
 155      */
 156     private Button fMetadataChannelButton = null;
 157     /**
 158      * Previous channel name
 159      */
 160     private String fPreviousChannelName = null;
 161
 162     // ------------------------------------------------------------------------
 163     // Constructors
 164     // ------------------------------------------------------------------------
 165
 166     /**
 167      * Constructor
 168      * @param shell - a shell for the display of the dialog
 169      */
 170     public EnableChannelDialog(Shell shell) {
 171        super(shell);
 172        fIsKernel = true;
 173
 174         // Common verify listener
 175         fVerifyListener = new VerifyListener() {
 176             @Override
 177             public void verifyText(VerifyEvent e) {
 178                 // only numbers and default are allowed.
 179                 e.doit = e.text.matches("[0-9]*") || e.text.matches(DEFAULT_TEXT); //$NON-NLS-1$
 180             }
 181         };
 182
 183         // Common focus listener
 184         fFocusListener = new FocusListener() {
 185
 186             @Override
 187             public void focusLost(FocusEvent e) {
 188                 Text focusLostWidget = (Text) e.widget;
 189                 if (focusLostWidget.getText().isEmpty()) {
 190                     focusLostWidget.setText(DEFAULT_TEXT);
 191                     focusLostWidget.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 192                 }
 193             }
 194
 195             @Override
 196             public void focusGained(FocusEvent e) {
 197                 Text focusGainedWidget = (Text) e.widget;
 198                 if (focusGainedWidget.getText().equals(DEFAULT_TEXT)) {
 199                     focusGainedWidget.setText(""); //$NON-NLS-1$
 200                     focusGainedWidget.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_BLACK));
 201                 }
 202             }
 203         };
 204
 205         setShellStyle(SWT.RESIZE | getShellStyle());
 206     }
 207
 208     // ------------------------------------------------------------------------
 209     // Accessors
 210     // ------------------------------------------------------------------------
 211
 212     @Override
 213     public IChannelInfo getChannelInfo() {
 214         return fChannelInfo;
 215     }
 216
 217     @Override
 218     public void setDomainComponent(TraceDomainComponent domain) {
 219         fDomain = domain;
 220         if (fDomain != null) {
 221             fIsKernel = fDomain.isKernel();
 222         } else {
 223             fIsKernel = true;
 224         }
 225     }
 226
 227     @Override
 228     public boolean isKernel() {
 229         return fIsKernel;
 230     }
 231
 232     @Override
 233     public void setHasKernel(boolean hasKernel) {
 234         if (fDomain != null) {
 235             fIsKernel = fDomain.isKernel();
 236         } else {
 237             fIsKernel = hasKernel;
 238         }
 239
 240         fHasKernel = hasKernel;
 241     }
 242
 243     @Override
 244     public void setTargetNodeComponent(TargetNodeComponent node) {
 245         fTargetNodeComponent = node;
 246     }
 247
 248     // ------------------------------------------------------------------------
 249     // Operations
 250     // ------------------------------------------------------------------------
 251
 252     @Override
 253     protected void configureShell(Shell newShell) {
 254         super.configureShell(newShell);
 255         newShell.setText(Messages.TraceControl_EnableChannelDialogTitle);
 256         newShell.setImage(Activator.getDefault().loadIcon(ENABLE_CHANNEL_ICON_FILE));
 257     }
 258
 259     @Override
 260     protected Control createDialogArea(Composite parent) {
 261
 262         int numColumn = 2;
 263         if (fTargetNodeComponent.isBufferTypeConfigSupported()) {
 264             numColumn = 3;
 265         }
 266
 267         // Main dialog panel
 268         Composite dialogComposite = new Composite(parent, SWT.NONE);
 269         GridLayout layout = new GridLayout(1, true);
 270         dialogComposite.setLayout(layout);
 271
 272         Composite commonModeGroup = new Composite(dialogComposite, SWT.NONE);
 273         layout = new GridLayout(3, true);
 274         commonModeGroup.setLayout(layout);
 275
 276         Label channelNameLabel = new Label(commonModeGroup, SWT.RIGHT);
 277         channelNameLabel.setText(Messages.TraceControl_EnableChannelNameLabel);
 278         fChannelNameText = new Text(commonModeGroup, SWT.NONE);
 279         fChannelNameText.setToolTipText(Messages.TraceControl_EnableChannelNameTooltip);
 280
 281         Label subBufferSizeLabel = new Label(commonModeGroup, SWT.RIGHT);
 282         subBufferSizeLabel.setText(Messages.TraceControl_SubBufferSizePropertyName);
 283         fSubBufferSizeText = new Text(commonModeGroup, SWT.NONE);
 284         fSubBufferSizeText.setToolTipText(Messages.TraceControl_EnableChannelSubBufferSizeTooltip);
 285         fSubBufferSizeText.addVerifyListener(fVerifyListener);
 286         fSubBufferSizeText.addFocusListener(fFocusListener);
 287         fSubBufferSizeText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 288
 289         Label numSubBufferLabel = new Label(commonModeGroup, SWT.RIGHT);
 290         numSubBufferLabel.setText(Messages.TraceControl_NbSubBuffersPropertyName);
 291         fNumberOfSubBuffersText = new Text(commonModeGroup, SWT.NONE);
 292         fNumberOfSubBuffersText.setToolTipText(Messages.TraceControl_EnableChannelNbSubBuffersTooltip);
 293         fNumberOfSubBuffersText.addVerifyListener(fVerifyListener);
 294         fNumberOfSubBuffersText.addFocusListener(fFocusListener);
 295
 296         Label switchTimerLabel = new Label(commonModeGroup, SWT.RIGHT);
 297         switchTimerLabel.setText(Messages.TraceControl_SwitchTimerPropertyName);
 298         fSwitchTimerText = new Text(commonModeGroup, SWT.NONE);
 299         fSwitchTimerText.setToolTipText(Messages.TraceControl_EnableChannelSwitchTimerTooltip);
 300         fSwitchTimerText.addVerifyListener(fVerifyListener);
 301         fSwitchTimerText.addFocusListener(fFocusListener);
 302
 303         Label readTimerLabel = new Label(commonModeGroup, SWT.RIGHT);
 304         readTimerLabel.setText(Messages.TraceControl_ReadTimerPropertyName);
 305         fReadTimerText = new Text(commonModeGroup, SWT.NONE);
 306         fReadTimerText.setToolTipText(Messages.TraceControl_EnableChannelReadTimerTooltip);
 307         fReadTimerText.addVerifyListener(fVerifyListener);
 308         fReadTimerText.addFocusListener(fFocusListener);
 309
 310         if (fTargetNodeComponent.isTraceFileRotationSupported()) {
 311             Label maxSizeTraceFilesLabel = new Label(commonModeGroup, SWT.RIGHT);
 312             maxSizeTraceFilesLabel.setText(Messages.TraceControl_MaxSizeTraceFilesPropertyName);
 313             fMaxSizeTraceText = new Text(commonModeGroup, SWT.NONE);
 314             fMaxSizeTraceText.setToolTipText(Messages.TraceControl_EnbleChannelMaxSizeTraceFilesTooltip);
 315             fMaxSizeTraceText.addVerifyListener(fVerifyListener);
 316             fMaxSizeTraceText.addFocusListener(fFocusListener);
 317
 318             Label maxNumTraceFilesLabel = new Label(commonModeGroup, SWT.RIGHT);
 319             maxNumTraceFilesLabel.setText(Messages.TraceControl_MaxNumTraceFilesPropertyName);
 320             fMaxNumberTraceText = new Text(commonModeGroup, SWT.NONE);
 321             fMaxNumberTraceText.setToolTipText(Messages.TraceControl_EnbleChannelMaxNumTraceFilesTooltip);
 322             fMaxNumberTraceText.addVerifyListener(fVerifyListener);
 323             fMaxNumberTraceText.addFocusListener(fFocusListener);
 324         }
 325
 326         if (fTargetNodeComponent.isPeriodicalMetadataFlushSupported()) {
 327             fMetadataChannelButton = new Button(commonModeGroup, SWT.CHECK);
 328             fMetadataChannelButton.setText(Messages.TraceControl_ConfigureMetadataChannelName);
 329             fMetadataChannelButton.setSelection(false);
 330
 331             fMetadataChannelButton.addSelectionListener(new SelectionAdapter() {
 332                 @Override
 333                 public void widgetSelected(SelectionEvent e) {
 334                     if (fMetadataChannelButton.getSelection()) {
 335                         fPreviousChannelName = fChannelNameText.getText();
 336                         fChannelNameText.setText("metadata"); //$NON-NLS-1$
 337                         fChannelNameText.setEnabled(false);
 338                     } else {
 339                         fChannelNameText.setText(fPreviousChannelName);
 340                         fChannelNameText.setEnabled(true);
 341                     }
 342                 }
 343             });
 344         }
 345         Group discardModeGroup = new Group(dialogComposite, SWT.SHADOW_NONE);
 346         discardModeGroup.setText(Messages.TraceControl_EnableChannelDiscardModeGroupName);
 347         layout = new GridLayout(numColumn, true);
 348         discardModeGroup.setLayout(layout);
 349
 350         fDiscardModeButton = new  Button(discardModeGroup, SWT.RADIO);
 351         fDiscardModeButton.setText(Messages.TraceControl_EnableChannelDiscardModeLabel);
 352         fDiscardModeButton.setToolTipText(Messages.TraceControl_EnableChannelDiscardModeTooltip);
 353         fDiscardModeButton.setSelection(true);
 354
 355         fOverwriteModeButton = new Button(discardModeGroup, SWT.RADIO);
 356         fOverwriteModeButton.setText(Messages.TraceControl_EnableChannelOverwriteModeLabel);
 357         fOverwriteModeButton.setToolTipText(Messages.TraceControl_EnableChannelOverwriteModeTooltip);
 358         fOverwriteModeButton.setSelection(false);
 359
 360         Group domainGroup = new Group(dialogComposite, SWT.SHADOW_NONE);
 361         domainGroup.setText(Messages.TraceControl_DomainDisplayName);
 362         layout = new GridLayout(numColumn, true);
 363         domainGroup.setLayout(layout);
 364
 365         fKernelButton = new Button(domainGroup, SWT.RADIO);
 366         fKernelButton.setText(Messages.TraceControl_KernelDomainDisplayName);
 367         fKernelButton.setSelection(fIsKernel);
 368         fUstButton = new Button(domainGroup, SWT.RADIO);
 369         fUstButton.setText(Messages.TraceControl_UstDisplayName);
 370         fUstButton.setSelection(!fIsKernel);
 371
 372         if (fTargetNodeComponent.isBufferTypeConfigSupported()) {
 373             Group bufferTypeGroup = new Group(dialogComposite, SWT.SHADOW_NONE);
 374             bufferTypeGroup.setText(Messages.TraceControl_BufferTypeDisplayName);
 375             layout = new GridLayout(numColumn, true);
 376             bufferTypeGroup.setLayout(layout);
 377
 378             GridData data = new GridData(GridData.FILL, GridData.BEGINNING, false, false);
 379             data.horizontalSpan = 3;
 380             bufferTypeGroup.setLayoutData(data);
 381
 382             fSharedBuffersButton = new Button(bufferTypeGroup, SWT.RADIO);
 383             fSharedBuffersButton.setText(Messages.TraceControl_SharedBuffersDisplayName);
 384             fSharedBuffersButton.setSelection(fIsKernel);
 385             fSharedBuffersButton.setEnabled(false);
 386
 387             fPIDBuffersButton = new Button(bufferTypeGroup, SWT.RADIO);
 388             fPIDBuffersButton.setText(Messages.TraceControl_PerPidBuffersDisplayName);
 389             fPIDBuffersButton.setToolTipText(Messages.TraceControl_PerPidBuffersTooltip);
 390             fPIDBuffersButton.setSelection(false);
 391
 392             fUIDBuffersButton = new Button(bufferTypeGroup, SWT.RADIO);
 393             fUIDBuffersButton.setText(Messages.TraceControl_PerUidBuffersDisplayName);
 394             fUIDBuffersButton.setToolTipText(Messages.TraceControl_PerPidBuffersTooltip);
 395             fUIDBuffersButton.setSelection(false);
 396
 397             fUIDBuffersButton.setEnabled(!fIsKernel);
 398             fPIDBuffersButton.setEnabled(!fIsKernel);
 399
 400             // Update buffers type buttons depending on UST or Kernel
 401             fUstButton.addSelectionListener(new SelectionAdapter() {
 402                 @Override
 403                 public void widgetSelected(SelectionEvent e) {
 404                     if (fUstButton.getSelection()) {
 405                         fSharedBuffersButton.setSelection(false);
 406                         fPIDBuffersButton.setSelection(false);
 407                         fUIDBuffersButton.setSelection(false);
 408                         fPIDBuffersButton.setEnabled(true);
 409                         fUIDBuffersButton.setEnabled(true);
 410                     } else {
 411                         fSharedBuffersButton.setSelection(true);
 412                         fPIDBuffersButton.setSelection(false);
 413                         fUIDBuffersButton.setSelection(false);
 414                         fPIDBuffersButton.setEnabled(false);
 415                         fUIDBuffersButton.setEnabled(false);
 416                     }
 417                 }
 418             });
 419         }
 420
 421         if ((fDomain != null) || (!fHasKernel)) {
 422             fKernelButton.setEnabled(false);
 423             fUstButton.setEnabled(false);
 424
 425             if (fTargetNodeComponent.isBufferTypeConfigSupported()) {
 426                 fSharedBuffersButton.setEnabled(false);
 427                 fUIDBuffersButton.setEnabled(!fHasKernel);
 428                 fPIDBuffersButton.setEnabled(!fHasKernel);
 429                 setBufferTypeButtonSelection();
 430             }
 431         }
 432
 433         // layout widgets
 434         GridData data = new GridData(GridData.FILL, GridData.BEGINNING, false, false);
 435         data.horizontalSpan = 3;
 436         discardModeGroup.setLayoutData(data);
 437         data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 438         fDiscardModeButton.setLayoutData(data);
 439         data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 440         fOverwriteModeButton.setLayoutData(data);
 441
 442         data = new GridData(GridData.FILL, GridData.BEGINNING, false, false);
 443         data.horizontalSpan = 3;
 444         domainGroup.setLayoutData(data);
 445
 446         data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 447         fKernelButton.setLayoutData(data);
 448         data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 449         fUstButton.setLayoutData(data);
 450         if (fTargetNodeComponent.isBufferTypeConfigSupported()) {
 451             data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 452             fSharedBuffersButton.setLayoutData(data);
 453             data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 454             fPIDBuffersButton.setLayoutData(data);
 455             data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 456             fUIDBuffersButton.setLayoutData(data);
 457         }
 458
 459         if (fTargetNodeComponent.isPeriodicalMetadataFlushSupported()) {
 460             data = new GridData(SWT.BEGINNING, SWT.BEGINNING, true, true);
 461             data.horizontalSpan = numColumn;
 462             fMetadataChannelButton.setLayoutData(data);
 463         }
 464
 465         data = new GridData(GridData.FILL_HORIZONTAL);
 466         data.horizontalSpan = 2;
 467
 468         fChannelNameText.setLayoutData(data);
 469         fSubBufferSizeText.setLayoutData(data);
 470         fNumberOfSubBuffersText.setLayoutData(data);
 471         fSwitchTimerText.setLayoutData(data);
 472         fReadTimerText.setLayoutData(data);
 473         if (fTargetNodeComponent.isTraceFileRotationSupported()) {
 474             fMaxNumberTraceText.setLayoutData(data);
 475             fMaxSizeTraceText.setLayoutData(data);
 476         }
 477
 478         setDefaults();
 479
 480         return dialogComposite;
 481     }
 482
 483     @Override
 484     protected void createButtonsForButtonBar(Composite parent) {
 485         createButton(parent, IDialogConstants.DETAILS_ID, "&Default", true); //$NON-NLS-1$
 486         createButton(parent, IDialogConstants.CANCEL_ID, "&Cancel", true); //$NON-NLS-1$
 487         createButton(parent, IDialogConstants.OK_ID, "&Ok", true); //$NON-NLS-1$
 488     }
 489
 490     @Override
 491     protected void okPressed() {
 492         // Set channel information
 493         ChannelInfo channelInfo = new ChannelInfo(fChannelNameText.getText());
 494         channelInfo.setSubBufferSize(fSubBufferSizeText.getText().equals(DEFAULT_TEXT) ? LTTngControlServiceConstants.UNUSED_VALUE : Long.parseLong(fSubBufferSizeText.getText()));
 495         channelInfo.setNumberOfSubBuffers(fNumberOfSubBuffersText.getText().equals(DEFAULT_TEXT) ? LTTngControlServiceConstants.UNUSED_VALUE : Integer.parseInt(fNumberOfSubBuffersText.getText()));
 496         channelInfo.setSwitchTimer(fSwitchTimerText.getText().equals(DEFAULT_TEXT) ? LTTngControlServiceConstants.UNUSED_VALUE : Long.parseLong(fSwitchTimerText.getText()));
 497         channelInfo.setReadTimer(fReadTimerText.getText().equals(DEFAULT_TEXT) ? LTTngControlServiceConstants.UNUSED_VALUE : Long.parseLong(fReadTimerText.getText()));
 498         channelInfo.setOverwriteMode(fOverwriteModeButton.getSelection());
 499         if (fTargetNodeComponent.isTraceFileRotationSupported()) {
 500             channelInfo.setMaxSizeTraceFiles(fMaxSizeTraceText.getText().equals(DEFAULT_TEXT) ? LTTngControlServiceConstants.UNUSED_VALUE : Integer.parseInt(fMaxSizeTraceText.getText()));
 501             channelInfo.setMaxNumberTraceFiles(fMaxNumberTraceText.getText().equals(DEFAULT_TEXT) ? LTTngControlServiceConstants.UNUSED_VALUE : Integer.parseInt(fMaxNumberTraceText.getText()));
 502         }
 503         if (fTargetNodeComponent.isBufferTypeConfigSupported()) {
 504             if (fSharedBuffersButton.getSelection()) {
 505                 channelInfo.setBufferType(BufferType.BUFFER_SHARED);
 506             } else if (fPIDBuffersButton.getSelection()) {
 507                 channelInfo.setBufferType(BufferType.BUFFER_PER_PID);
 508             } else if (fUIDBuffersButton.getSelection()) {
 509                 channelInfo.setBufferType(BufferType.BUFFER_PER_UID);
 510             } else {
 511                 channelInfo.setBufferType(BufferType.BUFFER_TYPE_UNKNOWN);
 512             }
 513         }
 514
 515         fIsKernel = fKernelButton.getSelection();
 516
 517         // Check for invalid names
 518         if (!channelInfo.getName().matches("^[a-zA-Z0-9\\-\\_]{1,}$")) { //$NON-NLS-1$
 519             MessageDialog.openError(getShell(),
 520                   Messages.TraceControl_EnableChannelDialogTitle,
 521                   Messages.TraceControl_InvalidChannelNameError + " (" + channelInfo.getName() + ") \n");  //$NON-NLS-1$ //$NON-NLS-2$
 522             return;
 523         }
 524
 525         // Check for duplicate names
 526         if (fDomain != null && fDomain.containsChild(channelInfo.getName())) {
 527             MessageDialog.openError(getShell(),
 528                     Messages.TraceControl_EnableChannelDialogTitle,
 529                     Messages.TraceControl_ChannelAlreadyExistsError + " (" + channelInfo.getName() + ") \n");  //$NON-NLS-1$ //$NON-NLS-2$
 530             return;
 531         }
 532
 533         fChannelInfo = channelInfo;
 534
 535         // validation successful -> call super.okPressed()
 536         super.okPressed();
 537     }
 538
 539     @Override
 540     protected void buttonPressed(int buttonId) {
 541         if (buttonId == IDialogConstants.DETAILS_ID) {
 542             setDefaults();
 543             return;
 544         }
 545         super.buttonPressed(buttonId);
 546     }
 547
 548     // ------------------------------------------------------------------------
 549     // Helper methods
 550     // ------------------------------------------------------------------------
 551
 552     /**
 553      * Sets default value depending on Kernel or UST
 554      */
 555     private void setDefaults() {
 556         fSwitchTimerText.setText(DEFAULT_TEXT);
 557         fSwitchTimerText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 558         fReadTimerText.setText(DEFAULT_TEXT);
 559         fReadTimerText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 560         fOverwriteModeButton.setSelection(IChannelInfo.DEFAULT_OVERWRITE_MODE);
 561         if (fTargetNodeComponent.isTraceFileRotationSupported()) {
 562             fMaxSizeTraceText.setText(DEFAULT_TEXT);
 563             fMaxSizeTraceText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 564             fMaxNumberTraceText.setText(DEFAULT_TEXT);
 565             fMaxNumberTraceText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 566         }
 567         fSubBufferSizeText.setText(DEFAULT_TEXT);
 568         fSubBufferSizeText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 569         fNumberOfSubBuffersText.setText(DEFAULT_TEXT);
 570         fNumberOfSubBuffersText.setForeground(getShell().getDisplay().getSystemColor(SWT.COLOR_GRAY));
 571         if (fTargetNodeComponent.isBufferTypeConfigSupported()) {
 572             setBufferTypeButtonSelection();
 573         }
 574     }
 575
 576     private void setBufferTypeButtonSelection() {
 577         if ((fDomain != null) && fDomain.getBufferType() != null) {
 578             switch (fDomain.getBufferType()) {
 579             case BUFFER_PER_PID:
 580                 fPIDBuffersButton.setSelection(true);
 581                 break;
 582             case BUFFER_PER_UID:
 583                 fUIDBuffersButton.setSelection(true);
 584                 break;
 585             case BUFFER_SHARED:
 586                 fSharedBuffersButton.setSelection(true);
 587                 break;
 588                 //$CASES-OMITTED$
 589             default:
 590                 break;
 591             }
 592         }
 593     }
 594
 595 }