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

  public void createContents(Composite parent) {
    int style = SWT.SINGLE | SWT.V_SCROLL | SWT.H_SCROLL;
    final TreeViewer viewer = new TreeViewer(parent, style);
    ColumnViewerToolTipSupport.enableFor(viewer, ToolTip.NO_RECREATE);
    viewer.setContentProvider(new PageDescriptorContentProvider());
    viewer.setComparator(new ViewerComparator());
    viewer.setLabelProvider(new PageDescriptorLabelProvider());
    
    viewer.getTree().addListener(SWT.MeasureItem, new Listener() {
      @Override
      public void handleEvent(Event event) {

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            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
            }
        });


        filesViewer.setComparator(new ViewerComparator());
        filesViewer.setInput(files);


        // ��ӡ�ɾ����ť
        Button addFolder = new Button(composite, SWT.NULL);
        Button addFile = new Button(composite, SWT.NULL);

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                }


                return super.getImage( element );
            }
        } );
        viewer.setComparator( new ViewerComparator()
        {
            public int compare( Viewer viewer, Object e1, Object e2 )
            {
                if ( ( e1 instanceof ReplConsumerBean ) && ( e2 instanceof ReplConsumerBean ) )
                {

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        list = new TableViewer(composite, SWT.H_SCROLL | SWT.V_SCROLL
                | SWT.BORDER);
        list.setLabelProvider(new PerspectiveLabelProvider());
        list.setContentProvider(new PerspContentProvider());
        list.addFilter(new ActivityViewerFilter());
        list.setComparator(new ViewerComparator());
        list.setInput(perspReg);
        list.addSelectionChangedListener(this);
        list.getTable().setFont(font);


        // Set perspective list size.

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      contentTypesViewer.getControl().setFont(composite.getFont());
      contentTypesViewer
          .setContentProvider(new ContentTypesContentProvider());
      contentTypesViewer
          .setLabelProvider(new ContentTypesLabelProvider());
      contentTypesViewer.setComparator(new ViewerComparator());
      contentTypesViewer.setInput(Platform.getContentTypeManager());
      GridData data = new GridData(GridData.FILL_BOTH);
      data.horizontalSpan = 2;
      contentTypesViewer.getControl().setLayoutData(data);

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   * Return a viewer comparator for looking at the jobs.
   * 
   * @return ViewerComparator
   */
  static ViewerComparator getProgressViewerComparator() {
    return new ViewerComparator() {
      /*
       * (non-Javadoc)
       * 
       * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer,
       *      java.lang.Object, java.lang.Object)

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                | SWT.BORDER);
        list.getTable().setFont(parent.getFont());
        list.setLabelProvider(new PerspectiveLabelProvider());
        list.setContentProvider(new PerspContentProvider());
        list.addFilter(activityViewerFilter);
        list.setComparator(new ViewerComparator());
        list.setInput(perspReg);
        list.addSelectionChangedListener(this);
        list.addDoubleClickListener(new IDoubleClickListener() {
            public void doubleClick(DoubleClickEvent event) {
                handleDoubleClickEvent();

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   * (non-Javadoc)
   * 
   * @see org.eclipse.ui.internal.progress.AbstractProgressViewer#add(java.lang.Object[])
   */
  public void add(Object[] elements) {
    ViewerComparator sorter = getComparator();
    ArrayList newItems = new ArrayList(control.getChildren().length
        + elements.length);


    Control[] existingChildren = control.getChildren();
    for (int i = 0; i < existingChildren.length; i++) {
      newItems.add(existingChildren[i].getData());
    }


    for (int i = 0; i < elements.length; i++) {
      newItems.add(elements[i]);
    }


    JobTreeElement[] infos = new JobTreeElement[newItems.size()];
    newItems.toArray(infos);


    if (sorter != null) {
      sorter.sort(this, infos);
    }


    // Update with the new elements to prevent flash
    for (int i = 0; i < existingChildren.length; i++) {
      ((ProgressInfoItem) existingChildren[i]).dispose();

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                return;
            }


            viewer = new DetailedProgressViewer(viewerComposite, SWT.MULTI
                    | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
            viewer.setComparator(new ViewerComparator() {
                /*
                 * (non-Javadoc)
                 * 
                 * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer,
                 *      java.lang.Object, java.lang.Object)

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   *            The parent Composite.
   */
  void showJobDetails(Composite parent) {
    viewer = new DetailedProgressViewer(parent, SWT.MULTI | SWT.H_SCROLL
        | SWT.V_SCROLL | SWT.BORDER);
    viewer.setComparator(new ViewerComparator() {
      /*
       * (non-Javadoc)
       * 
       * @see org.eclipse.jface.viewers.ViewerComparator#compare(org.eclipse.jface.viewers.Viewer,
       *      java.lang.Object, java.lang.Object)

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