Examples of org.eclipse.jface.viewers.ViewerComparator

org.eclipse.jface.viewers.ViewerComparator
A viewer comparator is used by a {@link StructuredViewer} toreorder the elements provided by its content provider.
The default compare method compares elements using two steps. The first step uses the values returned from category. By default, all elements are in the same category. The second level is based on a case insensitive compare of the strings obtained from the content viewer's label provider via ILabelProvider.getText.

Subclasses may implement the isSorterProperty method; they may reimplement the category method to provide categorization; and they may override the compare methods to provide a totally different way of sorting elements.
@see IStructuredContentProvider @see StructuredViewer @since 3.2

        else if (isOkButtonEnabled())
          buttonPressed(OK);
      }
    });


    branchTree.setComparator(new ViewerComparator(
        STRING_ASCENDING_COMPARATOR));


    createCustomArea(composite);


    setTitle(getTitle());

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    TagsNode tagsNode = new TagsNode(null, repository);
    ContentProvider contentProvider = new ContentProvider(tagsNode);
    treeViewer.setContentProvider(contentProvider);
    treeViewer
        .setLabelProvider(new RepositoriesViewStyledCellLabelProvider());
    treeViewer.setComparator(new ViewerComparator(
        CommonUtils.STRING_ASCENDING_COMPARATOR));
    treeViewer.setInput(tagsNode);


    final Object[] tagNodes = contentProvider.getElements(tagsNode);
    initiallySelectTags(tagNodes, treeViewer);

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    table.setLayoutData(gd);


    bundlesViewer = new TableViewer(table);
    bundlesViewer.setLabelProvider(new GitLabelProvider());
    bundlesViewer.setContentProvider(new ArrayContentProvider());
    bundlesViewer.setComparator(new ViewerComparator());
    counterLabel = new Label(comp, SWT.NONE);
    counterLabel.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    setControl(comp);
    setPageComplete(true);

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          checkPage();
        }
      });


      viewer.setLabelProvider(new GitLabelProvider());
      viewer.setComparator(new ViewerComparator(
          CommonUtils.STRING_ASCENDING_COMPARATOR));
      viewer.setInput(nodes);
    } else {
      branchesList = new TableViewer(area, this.style | SWT.H_SCROLL
          | SWT.V_SCROLL | SWT.BORDER);
      GridDataFactory.fillDefaults().grab(true, true)
          .applyTo(branchesList.getControl());
      branchesList.setContentProvider(ArrayContentProvider.getInstance());
      branchesList.setLabelProvider(new GitLabelProvider());
      branchesList.setComparator(new ViewerComparator(
          CommonUtils.STRING_ASCENDING_COMPARATOR));
      branchesList.setInput(nodes);
      branchesList
          .addSelectionChangedListener(new ISelectionChangedListener() {
            public void selectionChanged(SelectionChangedEvent event) {

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    });


    projectsList.setLabelProvider(new ProjectLabelProvider());


    projectsList.setInput(this);
    projectsList.setComparator(new ViewerComparator());
    createSelectionButtons(listComposite);
  }

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    viewer.setCellModifier(provider);
    updateViewer();
    viewer.setColumnProperties(new String[]{NAME_PROP,VALUE_PROP}); 
    viewer.setCellEditors(new CellEditor[]{new TextCellEditor(table),new TextCellEditor(table)});
    TableViewerEditor.create(viewer,new DblClickActivationStrategy(viewer),TreeViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR);
    viewer.setComparator(new ViewerComparator());
    table.addMouseListener(new MouseListener() {
      
      @Override
      public void mouseUp(MouseEvent e) {
        // Do nothing

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        logSeverityColumn.setWidth(70);
        logSeverityColumn.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                severityOrder *= -1;
                ViewerComparator comparator = getViewerComparator(SEVERITY);
                logFilteredTree.getViewer().setComparator(comparator);
                setComparator(SEVERITY);
                setColumnSorting(logSeverityColumn, severityOrder);
            }
        });


        logMessageColumn = new TreeColumn(logTree, SWT.LEFT);
        logMessageColumn.setText("Message");
        logMessageColumn.setWidth(500);
        logMessageColumn.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                messageOrder *= -1;
                ViewerComparator comparator = getViewerComparator(MESSAGE);
                logFilteredTree.getViewer().setComparator(comparator);
                setComparator(MESSAGE);
                setColumnSorting(logMessageColumn, messageOrder);
            }
        });


        logDateColumn = new TreeColumn(logTree, SWT.LEFT);
        logDateColumn.setText("Date");
        logDateColumn.setWidth(75);
        logDateColumn.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                dateOrder *= -1;
                ViewerComparator comparator = getViewerComparator(DATE);
                logFilteredTree.getViewer().setComparator(comparator);
                setComparator(DATE);
                setColumnSorting(logDateColumn, dateOrder);
            }
        });

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        logFilteredTree.getViewer().setInput(this);
    }


    private void initializeViewerSorter() {
        byte orderType = DATE;
        ViewerComparator comparator = getViewerComparator(orderType);
        logFilteredTree.getViewer().setComparator(comparator);
        if (orderType == MESSAGE) {
            setColumnSorting(logMessageColumn, messageOrder);
        } else if (orderType == DATE) {
            setColumnSorting(logDateColumn, dateOrder);

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        }
    }


    private ViewerComparator getViewerComparator(byte sortType) {
        if (sortType == SEVERITY) {
            return new ViewerComparator() {
                @Override
                public int compare(Viewer viewer, Object e1, Object e2) {
                    if ((e1 instanceof LogEntry) && (e2 instanceof LogEntry)) {
                        LogEntry entry1 = (LogEntry) e1;
                        LogEntry entry2 = (LogEntry) e2;
                        if (entry1.getSeverity() == entry2.getSeverity()) {
                            return 0;
                        } else if (entry1.getSeverity() > entry2.getSeverity()) {
                            return 1 * severityOrder;
                        } else {
                            return -1 * severityOrder;
                        }
                    }
                    return 0;
                }
            };
        } else if (sortType == MESSAGE) {
            return new ViewerComparator() {
                @Override
                public int compare(Viewer viewer, Object e1, Object e2) {
                    if ((e1 instanceof LogEntry) && (e2 instanceof LogEntry)) {
                        LogEntry entry1 = (LogEntry) e1;
                        LogEntry entry2 = (LogEntry) e2;
                        return String.CASE_INSENSITIVE_ORDER.compare(entry1.getMessage(true), entry2.getMessage(true))
                                * messageOrder;
                    }
                    return 0;
                }
            };
        } else {
            return new ViewerComparator() {
                @Override
                public int compare(Viewer viewer, Object e1, Object e2) {
                    long date1 = 0;
                    long date2 = 0;
                    if ((e1 instanceof LogEntry) && (e2 instanceof LogEntry)) {

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            comp = new ColumnSortComparator();
        }
        
        tableViewer.setComparator
        (
            new ViewerComparator()
            {
                @Override
                public int compare( final Viewer viewer,
                                    final Object x,
                                    final Object y )

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