org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/internal/lttng/ui/views/latency/dialogs/DeleteDialog.java

   1 /*******************************************************************************
   2  * Copyright (c) 2010, 2011 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  *   Philippe Sawicki (INF4990.A2010@gmail.com)   - Initial API and implementation
  11  *   Mathieu Denis    (mathieu.denis55@gmail.com) - Refactored code
  12  *   Bernd Hufmann - Adapted to new messages file, fixed warnings
  13  *******************************************************************************/
  14 package org.eclipse.linuxtools.internal.lttng.ui.views.latency.dialogs;
  15
  16 import org.eclipse.jface.dialogs.MessageDialog;
  17 import org.eclipse.linuxtools.internal.lttng.core.latency.analyzer.EventMatcher;
  18 import org.eclipse.linuxtools.internal.lttng.ui.views.latency.Messages;
  19 import org.eclipse.swt.SWT;
  20 import org.eclipse.swt.layout.GridData;
  21 import org.eclipse.swt.widgets.Button;
  22 import org.eclipse.swt.widgets.Composite;
  23 import org.eclipse.swt.widgets.Event;
  24 import org.eclipse.swt.widgets.Listener;
  25 import org.eclipse.swt.widgets.Shell;
  26 import org.eclipse.swt.widgets.TableItem;
  27
  28 /**
  29  * <b><u>DeleteDialog</u></b>
  30  * <p>
  31  * Remove dialog, lets the user remove start/end event pairs.
  32  *
  33  * @author Philippe Sawicki
  34  */
  35 public class DeleteDialog extends ListDialog {
  36
  37     // ------------------------------------------------------------------------
  38     // Constructors
  39     // ------------------------------------------------------------------------
  40
  41     /**
  42      * Constructor.
  43      * @param parentShell
  44      *            The parent shell.
  45      * @param title
  46      *            The dialog's window title.
  47      * @param message
  48      *            The dialog's window message.
  49      */
  50     public DeleteDialog(Shell parentShell, String title, String message) {
  51         super(parentShell, title, message);
  52
  53         // Set the table style
  54         fStyle = SWT.MULTI | SWT.FULL_SELECTION | SWT.BORDER | SWT.V_SCROLL;
  55     }
  56
  57     // ------------------------------------------------------------------------
  58     // Operations
  59     // ------------------------------------------------------------------------
  60
  61     /*
  62      * (non-Javadoc)
  63      * @see org.eclipse.linuxtools.lttng.ui.views.latency.dialogs.ListDialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite)
  64      */
  65     @Override
  66     protected void createButtonsForButtonBar(Composite parent) {
  67         GridData gridData = new GridData();
  68         gridData.verticalAlignment = GridData.FILL;
  69         gridData.horizontalSpan = 1;
  70         gridData.grabExcessHorizontalSpace = true;
  71         gridData.grabExcessVerticalSpace = true;
  72         gridData.horizontalAlignment = SWT.RIGHT;
  73
  74         parent.setLayoutData(gridData);
  75
  76         // Create the "Delete" button
  77         Button deleteButton = createButton(parent, DELETE, Messages.LatencyView_Dialogs_DeleteEvents_Buttons_Delete, false);
  78         deleteButton.addListener(SWT.Selection, new Listener() {
  79             @Override
  80             public void handleEvent(Event event) {
  81                 TableItem selectedItem = fTable.getSelection()[0];
  82                 if (selectedItem == null)
  83                     return;
  84
  85                 int[] selectedIndices = fTable.getSelectionIndices();
  86
  87                 StringBuffer deletePairs = new StringBuffer(""); //$NON-NLS-1$
  88                 for (int i = 0; i < selectedIndices.length; i++) {
  89                     int index = selectedIndices[i];
  90                     deletePairs.append("\t* ").append(fEventStartTypes.get(index)).append(" / ").append(fEventEndTypes.get(index)); //$NON-NLS-1$ //$NON-NLS-2$
  91
  92                     if (i < selectedIndices.length - 1) {
  93                         deletePairs.append("\n"); //$NON-NLS-1$
  94                     }
  95                 }
  96
  97                 boolean confirmDeletion = MessageDialog.openQuestion(getShell(), Messages.LatencyView_Dialogs_DeleteEvents_Confirm_Title,
  98                         Messages.LatencyView_Dialogs_DeleteEvents_Confirm_Message + "\n\n" + deletePairs.toString()); //$NON-NLS-1$
  99
 100                 if (confirmDeletion) {
 101                     // Remove the events starting from the end of the list, otherwise the TableItem elements will lose
 102                     // their index from the table and may trigger an exception when removing an index that is no longer
 103                     // valid.
 104                     for (int i = selectedIndices.length - 1; i >= 0; i--) {
 105                         int selectedIndex = selectedIndices[i];
 106                         EventMatcher.getInstance().removeMatch(fEventStartTypes.get(selectedIndex), fEventEndTypes.get(selectedIndex));
 107
 108                         fTable.remove(selectedIndex);
 109
 110                         // Update the list of events
 111                         fEventStartTypes.remove(selectedIndex);
 112                         fEventEndTypes.remove(selectedIndex);
 113                     }
 114
 115                     // Save the events pairs in the settings file so it can be retrieved in the next session
 116                     saveMatchPairs(fEventStartTypes, fEventEndTypes);
 117
 118                     fTable.setItemCount(fEventStartTypes.size());
 119
 120                     TableItem[] newItems = fTable.getItems();
 121                     fTable.removeAll();
 122                     for (int i = 0; i < newItems.length; i++) {
 123                         TableItem item = new TableItem(fTable, SWT.RIGHT);
 124
 125                         String max = String.valueOf(fEventStartTypes.size());
 126                         String number = formatListNumber(i + 1, max.length());
 127
 128                         String[] columns = { number, fEventStartTypes.get(i), fEventEndTypes.get(i) };
 129
 130                         item.setText(columns);
 131                     }
 132
 133                     fRedrawGraphs = true;
 134                 }
 135             }
 136         });
 137
 138         // Create the "Close" button
 139         Button closeButton = createButton(parent, CANCEL, Messages.LatencyView_Dialogs_AddEvents_Buttons_Close, false);
 140         closeButton.addListener(SWT.Selection, new Listener() {
 141             @Override
 142             public void handleEvent(Event event) {
 143                 // Remember the user's list
 144                 saveMatchPairs(fEventStartTypes, fEventEndTypes);
 145
 146                 setReturnCode(CANCEL);
 147
 148                 if (fRedrawGraphs == true)
 149                     redrawGraphs();
 150
 151                 close();
 152             }
 153         });
 154     }
 155 }