Example usage for org.eclipse.jface.viewers ViewerComparator ViewerComparator

List of usage examples for org.eclipse.jface.viewers ViewerComparator ViewerComparator

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Introduction

In this page you can find the example usage for org.eclipse.jface.viewers ViewerComparator ViewerComparator.

Prototype

public ViewerComparator()

Source Link

Document

Creates a new ViewerComparator , which uses the default comparator to sort strings.

Usage

From source file:io.mapzone.ide.newproject.LoginWizardPage.java

License:Open Source License

public void createControl(Composite parent) {
    Composite container = new Composite(parent, SWT.NULL);
    form = new InputForm(container);

    // username / password
    userText = form.createText("Account name", "");
    userText.setToolTipText("mapzone.io account name");

    pwdText = form.createText("Password", "", SWT.PASSWORD);

    Button loginBtn = new Button(container, SWT.PUSH);
    loginBtn.setText("Login");
    loginBtn.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent ev) {
            doLogin();/*  w  w  w  . j  ava2 s  .  co  m*/
        }
    });

    // label
    Label label = new Label(container, SWT.NULL);
    label.setText("Your mapzone.io projects");

    // projectsList
    projectsList = new ListViewer(container, SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL);
    projectsList.setContentProvider(ArrayContentProvider.getInstance());
    projectsList.setLabelProvider(new LabelProvider() {
        @Override
        public String getText(Object elm) {
            return ((MapzoneProject) elm).name();
        }
    });
    projectsList.setComparator(new ViewerComparator());
    projectsList.addSelectionChangedListener(ev -> {
        wizardData.mapzoneProject = (MapzoneProject) projectsList.getStructuredSelection().getFirstElement();
        updateStatus();
    });

    // layout
    //        container.setLayout( FormLayoutFactory.defaults().spacing( 8 ).create() );
    //        FormDataFactory.on( userText ).fill().noBottom();
    //        FormDataFactory.on( pwdText ).fill().top( userText ).noBottom();
    FormDataFactory.on(loginBtn).fill().top(pwdText, 5).noBottom();
    FormDataFactory.on(label).fill().left(0, 3).top(loginBtn, 5).noBottom();
    FormDataFactory.on(projectsList.getControl()).fill().top(label);

    setControl(container);
}

From source file:io.sarl.eclipse.preferences.SREsPreferencePage.java

License:Apache License

/**
 * Sorts by SRE name./*  w  w w  . jav  a2  s .  c  om*/
 */
private void sortByName() {
    this.sresList.setComparator(new ViewerComparator() {
        @Override
        public int compare(Viewer viewer, Object e1, Object e2) {
            if ((e1 instanceof ISREInstall) && (e2 instanceof ISREInstall)) {
                final ISREInstall left = (ISREInstall) e1;
                final ISREInstall right = (ISREInstall) e2;
                return left.getName().compareToIgnoreCase(right.getName());
            }
            return super.compare(viewer, e1, e2);
        }

        @Override
        public boolean isSorterProperty(Object element, String property) {
            return true;
        }
    });
    this.sortColumn = Column.NAME;
}

From source file:io.sarl.eclipse.preferences.SREsPreferencePage.java

License:Apache License

/**
 * Sorts by VM location.//from  w ww  .  java 2  s  .co  m
 */
private void sortByLocation() {
    this.sresList.setComparator(new ViewerComparator() {
        @Override
        public int compare(Viewer viewer, Object e1, Object e2) {
            if ((e1 instanceof ISREInstall) && (e2 instanceof ISREInstall)) {
                final ISREInstall left = (ISREInstall) e1;
                final ISREInstall right = (ISREInstall) e2;
                return left.getLocation().compareToIgnoreCase(right.getLocation());
            }
            return super.compare(viewer, e1, e2);
        }

        @Override
        public boolean isSorterProperty(Object element, String property) {
            return true;
        }
    });
    this.sortColumn = Column.LOCATION;
}

From source file:lslforge.wizards.ContainerSelectionGroup.java

License:Open Source License

/**
 * Returns a new drill down viewer for this dialog.
 * /*from  w ww  . j  a v  a  2  s . c o m*/
 * @param heightHint
 *            height hint for the drill down composite
 */
protected void createTreeViewer(int heightHint) {
    // Create drill down.
    DrillDownComposite drillDown = new DrillDownComposite(this, SWT.BORDER);
    GridData spec = new GridData(SWT.FILL, SWT.FILL, true, true);
    spec.widthHint = SIZING_SELECTION_PANE_WIDTH;
    spec.heightHint = heightHint;
    drillDown.setLayoutData(spec);

    // Create tree viewer inside drill down.
    treeViewer = new TreeViewer(drillDown, SWT.NONE);
    drillDown.setChildTree(treeViewer);
    ContainerContentProvider cp = new ContainerContentProvider();
    cp.showClosedProjects(showClosedProjects);
    treeViewer.setContentProvider(cp);
    treeViewer.setLabelProvider(WorkbenchLabelProvider.getDecoratingWorkbenchLabelProvider());
    treeViewer.setComparator(new ViewerComparator());
    treeViewer.setUseHashlookup(true);
    treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {
        public void selectionChanged(SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            containerSelectionChanged((IContainer) selection.getFirstElement()); // allow null
        }
    });
    treeViewer.addDoubleClickListener(new IDoubleClickListener() {
        public void doubleClick(DoubleClickEvent event) {
            ISelection selection = event.getSelection();
            if (selection instanceof IStructuredSelection) {
                Object item = ((IStructuredSelection) selection).getFirstElement();
                if (item == null) {
                    return;
                }
                if (treeViewer.getExpandedState(item)) {
                    treeViewer.collapseToLevel(item, 1);
                } else {
                    treeViewer.expandToLevel(item, 1);
                }
            }
        }
    });

    // This has to be done after the viewer has been laid out
    treeViewer.setInput(ResourcesPlugin.getWorkspace());
}

From source file:masterviews.composite.abstracts.TableComposite.java

License:Open Source License

/**
 * Create the Table viewer for this composite
 *///from   w  w  w . j  av a2s  .  co m
public void createTableViewer(Composite parent) {
    viewer = initializeTableViewer(parent);
    viewer.setContentProvider(initContentProvider());
    viewer.setLabelProvider(initLabelProvider());
    initInput();
    viewer.getTable().setLayoutData(GridDataFactory.fillDefaults().span(2, 1).grab(true, true).create());
    //set default toString() comparator, override this if needed
    viewer.setComparator(new ViewerComparator());
}

From source file:masterviews.composite.abstracts.TreeComposite.java

License:Open Source License

/**
 * Create the tree viewer for this composite
 *//*from  w w  w. j  a  v  a2s. c  o m*/
public void createTreeViewer(Composite parent, int style) {
    if (style == SWT.SINGLE) {
        viewer = initializeSingleFilteredTreeViewer(parent);
    } else {
        viewer = initializeFilteredTreeViewer(parent);
    }
    viewer.setContentProvider(initContentProvider());
    viewer.setLabelProvider(initLabelProvider());
    viewer.setAutoExpandLevel(Integer.MAX_VALUE);
    //set default toString() comparator, override this if needed
    viewer.setComparator(new ViewerComparator());

    final Tree tree = viewer.getTree();
    tree.setLayoutData(GridDataFactory.fillDefaults().span(2, 1).grab(true, true).create());
}

From source file:masterviews.composite.abstracts.TreeTableComposite.java

License:Open Source License

/**
 * Create the tree viewer for this composite
 *//*from w w  w .  j a v  a  2 s . com*/
protected void createTreeViewer(Composite parent, int style) {
    if (style == SWT.SINGLE) {
        viewer = initializeSingleFilteredTreeViewer(parent);
    } else {
        viewer = initializeFilteredTreeViewer(parent);
    }
    viewer.setContentProvider(initContentProvider());
    viewer.setLabelProvider(initLabelProvider());
    viewer.setAutoExpandLevel(Integer.MAX_VALUE);
    //set default toString() comparator, override this if needed
    viewer.setComparator(new ViewerComparator());

    final Tree tree = viewer.getTree();
    tree.setLayoutData(GridDataFactory.fillDefaults().span(2, 1).grab(true, true).create());

    tree.setHeaderVisible(true);
    tree.setLinesVisible(true);
    initColumn(tree);
    addColumn(tree);

}

From source file:mpj_express_debugger.MPJExpressParameterTab.java

License:Open Source License

@Override
public void createControl(Composite parent) {
    Composite comp = SWTFactory.createComposite(parent, 1, 1, GridData.FILL_HORIZONTAL);
    setControl(comp);/*from ww w. j  a  v a2s .com*/
    PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(),
            IJavaDebugHelpContextIds.LAUNCH_CONFIGURATION_DIALOG_APPLET_PARAMETERS_TAB);

    @SuppressWarnings("restriction")
    Composite namecomp = SWTFactory.createComposite(comp, comp.getFont(), 5, 1, GridData.FILL_HORIZONTAL, 0, 0);

    SWTFactory.createLabel(namecomp, MPJLauncherMessages.mpjlauncher_argumenttab_nplabel_text, 1);

    npText = SWTFactory.createSingleText(namecomp, 1);
    npText.addModifyListener(fListener);

    SWTFactory.createLabel(namecomp, MPJLauncherMessages.mpjlauncher_argumenttab_homelabel_text, 1);

    mpjHomeText = SWTFactory.createSingleText(namecomp, 1);
    mpjHomeText.addModifyListener(fListener);
    fBrowseMPJHomeButton = SWTFactory.createPushButton(namecomp, "Browse", null);
    fBrowseMPJHomeButton.addSelectionListener(fListener);
    SWTFactory.createLabel(namecomp, MPJLauncherMessages.mpjlauncher_argumenttab_devlabel_text, 1);

    devText = SWTFactory.createSingleText(namecomp, 1);
    devText.addModifyListener(fListener);

    Label blank = new Label(namecomp, SWT.NONE);
    blank.setText(EMPTY_STRING);
    Label hint = SWTFactory.createLabel(namecomp, MPJLauncherMessages.MPJParametersTab__mandatory_mpj_home_path,
            1);
    GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_CENTER);
    hint.setLayoutData(gd);

    SWTFactory.createVerticalSpacer(comp, 1);

    Composite paramcomp = SWTFactory.createComposite(comp, comp.getFont(), 2, 1, GridData.FILL_BOTH, 0, 0);

    SWTFactory.createLabel(paramcomp, MPJLauncherMessages.appletlauncher_argumenttab_parameterslabel_text, 2);

    Table ptable = new Table(paramcomp, SWT.FULL_SELECTION | SWT.BORDER);
    fViewer = new TableViewer(ptable);
    gd = new GridData(GridData.FILL_BOTH);
    ptable.setLayoutData(gd);
    TableColumn column1 = new TableColumn(ptable, SWT.NONE);
    column1.setText(MPJLauncherMessages.appletlauncher_argumenttab_parameterscolumn_name_text);
    TableColumn column2 = new TableColumn(ptable, SWT.NONE);
    column2.setText(MPJLauncherMessages.appletlauncher_argumenttab_parameterscolumn_value_text);
    TableLayout tableLayout = new TableLayout();
    ptable.setLayout(tableLayout);
    tableLayout.addColumnData(new ColumnWeightData(100));
    tableLayout.addColumnData(new ColumnWeightData(100));
    ptable.setHeaderVisible(true);
    ptable.setLinesVisible(true);
    ptable.addSelectionListener(fListener);
    ptable.addMouseListener(new MouseAdapter() {
        public void mouseDoubleClick(MouseEvent e) {
            setParametersButtonsEnableState();
            if (fParametersEditButton.isEnabled()) {
                handleParametersEditButtonSelected();
            }
        }
    });

    fViewer.setContentProvider(new IStructuredContentProvider() {
        public Object[] getElements(Object inputElement) {
            Map params = (Map) inputElement;
            return params.keySet().toArray();
        }

        public void dispose() {
        }

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

    fViewer.setLabelProvider(new ITableLabelProvider() {
        public Image getColumnImage(Object element, int columnIndex) {
            return null;
        }

        public String getColumnText(Object element, int columnIndex) {
            if (columnIndex == 0) {
                return element.toString();
            }

            String key = (String) element;
            Map params = (Map) fViewer.getInput();
            Object object = params.get(key);
            if (object != null)
                return object.toString();
            return null;
        }

        public void addListener(ILabelProviderListener listener) {
        }

        public void dispose() {
        }

        public boolean isLabelProperty(Object element, String property) {
            return false;
        }

        public void removeListener(ILabelProviderListener listener) {
        }
    });

    fViewer.setComparator(new ViewerComparator());

    Composite envcomp = SWTFactory.createComposite(paramcomp, paramcomp.getFont(), 1, 1,
            GridData.VERTICAL_ALIGN_BEGINNING | GridData.HORIZONTAL_ALIGN_FILL, 0, 0);

    fParametersAddButton = createPushButton(envcomp,
            MPJLauncherMessages.appletlauncher_argumenttab_parameters_button_add_text, null);
    fParametersAddButton.addSelectionListener(fListener);

    fParametersEditButton = createPushButton(envcomp,
            MPJLauncherMessages.appletlauncher_argumenttab_parameters_button_edit_text, null);
    fParametersEditButton.addSelectionListener(fListener);

    fParametersRemoveButton = createPushButton(envcomp,
            MPJLauncherMessages.appletlauncher_argumenttab_parameters_button_remove_text, null);
    fParametersRemoveButton.addSelectionListener(fListener);

    setParametersButtonsEnableState();
    Dialog.applyDialogFont(parent);
}

From source file:net.certiv.fluentmark.preferences.pages.AppearanceConfigurationBlock.java

License:Open Source License

private Control createSyntaxPage(final Composite parent) {

    Composite colorComposite = new Composite(parent, SWT.NONE);
    GridLayout layout = new GridLayout();
    layout.marginHeight = 0;// www.ja  v  a 2s  . co  m
    layout.marginWidth = 0;
    colorComposite.setLayout(layout);

    Link link = new Link(colorComposite, SWT.NONE);
    link.setText(LINK_MSG);
    link.addSelectionListener(new SelectionAdapter() {

        @Override
        public void widgetSelected(SelectionEvent e) {
            if ("org.eclipse.ui.preferencePages.GeneralTextEditor".equals(e.text)) //$NON-NLS-1$
                PreferencesUtil.createPreferenceDialogOn(parent.getShell(), e.text, null, null);
            else if ("org.eclipse.ui.preferencePages.ColorsAndFonts".equals(e.text)) //$NON-NLS-1$
                PreferencesUtil.createPreferenceDialogOn(parent.getShell(), e.text, null,
                        "selectFont:org.eclipse.jdt.ui.editors.textfont"); //$NON-NLS-1$
        }
    });

    GridData gridData = new GridData(SWT.FILL, SWT.BEGINNING, true, false);
    gridData.widthHint = 150; // only expand further if anyone else requires it
    gridData.horizontalSpan = 2;
    link.setLayoutData(gridData);

    addFiller(colorComposite, 1);

    Label label;
    label = new Label(colorComposite, SWT.LEFT);
    label.setText("Element");
    label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

    Composite editorComposite = new Composite(colorComposite, SWT.NONE);
    layout = new GridLayout();
    layout.numColumns = 2;
    layout.marginHeight = 0;
    layout.marginWidth = 0;
    editorComposite.setLayout(layout);
    GridData gd = new GridData(SWT.FILL, SWT.FILL, true, true);
    gd.heightHint = convertHeightInCharsToPixels(7);
    editorComposite.setLayoutData(gd);

    fTreeViewer = new TreeViewer(editorComposite, SWT.SINGLE | SWT.BORDER);
    fTreeViewer.setLabelProvider(new ColorListLabelProvider());
    fTreeViewer.setContentProvider(new ColorListContentProvider());
    fTreeViewer.setComparator(new ViewerComparator() {

        @Override
        public int category(Object element) {
            // don't sort the top level categories
            if (fMarkupCategory.equals(element))
                return 0;
            if (fCodeCategory.equals(element))
                return 1;
            if (fCommentsCategory.equals(element))
                return 2;
            // to sort semantic settings after partition based ones:
            // if (element instanceof SemanticHighlightingColorListItem)
            // return 1;
            return 0;
        }
    });
    gd = new GridData(SWT.BEGINNING, SWT.FILL, false, true);
    gd.heightHint = convertHeightInCharsToPixels(7);
    int maxWidth = 0;
    for (Iterator<HighlightingColorListItem> it = fListModel.iterator(); it.hasNext();) {
        HighlightingColorListItem item = it.next();
        maxWidth = Math.max(maxWidth, convertWidthInCharsToPixels(item.getDisplayName().length()));
    }
    ScrollBar vBar = ((Scrollable) fTreeViewer.getControl()).getVerticalBar();
    if (vBar != null)
        maxWidth += vBar.getSize().x * 3; // scrollbars and tree indentation guess
    gd.widthHint = maxWidth;

    fTreeViewer.getControl().setLayoutData(gd);
    installDoubleClickListener();

    Composite stylesComposite = new Composite(editorComposite, SWT.NONE);
    layout = new GridLayout();
    layout.marginHeight = 0;
    layout.marginWidth = 0;
    layout.numColumns = 2;
    stylesComposite.setLayout(layout);
    stylesComposite.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, true, false));

    fEnableCheckbox = new Button(stylesComposite, SWT.CHECK);
    fEnableCheckbox.setText("Enable");
    gd = new GridData(GridData.FILL_HORIZONTAL);
    gd.horizontalAlignment = GridData.BEGINNING;
    gd.horizontalSpan = 2;
    fEnableCheckbox.setLayoutData(gd);

    fColorEditorLabel = new Label(stylesComposite, SWT.LEFT);
    fColorEditorLabel.setText("Color");
    gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    gd.horizontalIndent = SwtUtil.getIndent();
    fColorEditorLabel.setLayoutData(gd);

    fSyntaxForegroundColorEditor = new ColorSelector(stylesComposite);
    Button foregroundColorButton = fSyntaxForegroundColorEditor.getButton();
    gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    foregroundColorButton.setLayoutData(gd);

    fBoldCheckBox = new Button(stylesComposite, SWT.CHECK);
    fBoldCheckBox.setText("Bold");
    gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    gd.horizontalIndent = SwtUtil.getIndent();
    gd.horizontalSpan = 2;
    fBoldCheckBox.setLayoutData(gd);

    fItalicCheckBox = new Button(stylesComposite, SWT.CHECK);
    fItalicCheckBox.setText("Italic");
    gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    gd.horizontalIndent = SwtUtil.getIndent();
    gd.horizontalSpan = 2;
    fItalicCheckBox.setLayoutData(gd);

    fStrikethroughCheckBox = new Button(stylesComposite, SWT.CHECK);
    fStrikethroughCheckBox.setText("Strikethrough");
    gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    gd.horizontalIndent = SwtUtil.getIndent();
    gd.horizontalSpan = 2;
    fStrikethroughCheckBox.setLayoutData(gd);

    fUnderlineCheckBox = new Button(stylesComposite, SWT.CHECK);
    fUnderlineCheckBox.setText("Underline");
    gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING);
    gd.horizontalIndent = SwtUtil.getIndent();
    gd.horizontalSpan = 2;
    fUnderlineCheckBox.setLayoutData(gd);

    label = new Label(colorComposite, SWT.LEFT);
    label.setText("Preview");
    label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

    Control previewer = createPreviewer(colorComposite);
    gd = new GridData(GridData.FILL_HORIZONTAL);
    gd.widthHint = convertWidthInCharsToPixels(20);
    gd.heightHint = convertWidthInCharsToPixels(40);
    previewer.setLayoutData(gd);

    fTreeViewer.addSelectionChangedListener(new ISelectionChangedListener() {

        @Override
        public void selectionChanged(SelectionChangedEvent event) {
            handleSyntaxColorListSelection();
        }
    });

    foregroundColorButton.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
            // do nothing
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            HighlightingColorListItem item = getHighlightingColorListItem();
            PreferenceConverter.setValue(getPreferenceStore(), item.getColorKey(),
                    fSyntaxForegroundColorEditor.getColorValue());
        }
    });

    fBoldCheckBox.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
            // do nothing
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            HighlightingColorListItem item = getHighlightingColorListItem();
            getPreferenceStore().setValue(item.getBoldKey(), fBoldCheckBox.getSelection());
        }
    });

    fItalicCheckBox.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
            // do nothing
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            HighlightingColorListItem item = getHighlightingColorListItem();
            getPreferenceStore().setValue(item.getItalicKey(), fItalicCheckBox.getSelection());
        }
    });
    fStrikethroughCheckBox.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
            // do nothing
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            HighlightingColorListItem item = getHighlightingColorListItem();
            getPreferenceStore().setValue(item.getStrikethroughKey(), fStrikethroughCheckBox.getSelection());
        }
    });

    fUnderlineCheckBox.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
            // do nothing
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            HighlightingColorListItem item = getHighlightingColorListItem();
            getPreferenceStore().setValue(item.getUnderlineKey(), fUnderlineCheckBox.getSelection());
        }
    });

    fEnableCheckbox.addSelectionListener(new SelectionListener() {

        @Override
        public void widgetDefaultSelected(SelectionEvent e) {
        }

        @Override
        public void widgetSelected(SelectionEvent e) {
            HighlightingColorListItem item = getHighlightingColorListItem();
            if (item instanceof SemanticHighlightingColorListItem) {
                boolean enable = fEnableCheckbox.getSelection();
                getPreferenceStore().setValue(((SemanticHighlightingColorListItem) item).getEnableKey(),
                        enable);
                fEnableCheckbox.setSelection(enable);
                fSyntaxForegroundColorEditor.getButton().setEnabled(enable);
                fColorEditorLabel.setEnabled(enable);
                fBoldCheckBox.setEnabled(enable);
                fItalicCheckBox.setEnabled(enable);
                fStrikethroughCheckBox.setEnabled(enable);
                fUnderlineCheckBox.setEnabled(enable);
            }
        }
    });

    colorComposite.layout();

    return colorComposite;
}

From source file:net.enilink.komma.edit.ui.wizards.RefactorPreviewPage.java

License:Open Source License

@Override
public void createControl(Composite parent) {
    Composite composite = new Composite(parent, SWT.NONE);
    composite.setLayout(new GridLayout());

    final Tree tree = new Tree(composite, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION);
    tree.setHeaderVisible(true);/*from  w w w  . ja  va 2  s . c  o m*/
    tree.setLinesVisible(true);

    GridData treeGridData = new GridData(SWT.FILL, SWT.FILL, true, true);
    tree.setLayoutData(treeGridData);

    treeViewer = new TreeViewer(tree);
    treeViewer.setContentProvider(new ITreeContentProvider() {
        @Override
        public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        }

        @SuppressWarnings("unchecked")
        @Override
        public Object[] getElements(Object inputElement) {
            if (inputElement instanceof Collection) {
                return ((Collection<Change>) inputElement).toArray();
            }
            return getChildren(inputElement);
        }

        @Override
        public Object[] getChildren(Object parentElement) {
            if (parentElement instanceof Change) {
                return ((Change) parentElement).getStatementChanges().toArray();
            }
            return null;
        }

        @Override
        public Object getParent(Object element) {
            return null;
        }

        @Override
        public boolean hasChildren(Object element) {
            if (element instanceof Change) {
                return true;
            }
            return false;
        }

        @Override
        public void dispose() {
        }
    });
    treeViewer.addTreeListener(new ITreeViewerListener() {
        @Override
        public void treeCollapsed(final TreeExpansionEvent event) {
            getShell().getDisplay().asyncExec(new Runnable() {
                @Override
                public void run() {
                    treeViewer.update(event.getElement(), null);
                }
            });
        }

        @Override
        public void treeExpanded(final TreeExpansionEvent event) {
            getShell().getDisplay().asyncExec(new Runnable() {
                @Override
                public void run() {
                    treeViewer.update(event.getElement(), null);
                }
            });
        }
    });

    treeViewer.setComparator(new ViewerComparator() {
        @Override
        public int compare(Viewer viewer, Object o1, Object o2) {
            if (o1 instanceof Change && o2 instanceof Change) {
                return ((Change) o1).getModel().toString().compareTo(((Change) o2).getModel().toString());
            }
            if (o1 instanceof StatementChange && o2 instanceof StatementChange) {
                return compare(((StatementChange) o1).getStatement().getSubject(),
                        ((StatementChange) o2).getStatement().getSubject());
            }
            return o1.hashCode() - o2.hashCode();
        }

        private int compare(IReference s1, IReference s2) {
            // blank nodes at bottom
            if (s1.getURI() == null) {
                return (s2.getURI() == null ? s1.toString().compareTo(s2.toString()) : 1);
            }
            if (s2.getURI() == null) {
                return -1;
            }
            // compare the URIs
            return s1.toString().compareTo(s2.toString());
        }
    });

    TreeViewerColumn column = new TreeViewerColumn(treeViewer, SWT.LEFT);
    column.getColumn().setText("Resource");
    column.getColumn().setWidth(350);
    column.setLabelProvider(new TreeLabelProvider(TreeLabelProvider.ColumnType.RESOURCE));

    column = new TreeViewerColumn(treeViewer, SWT.LEFT);
    column.getColumn().setText("Property");
    column.getColumn().setWidth(350);
    column.setLabelProvider(new TreeLabelProvider(TreeLabelProvider.ColumnType.PROPERTY));

    column = new TreeViewerColumn(treeViewer, SWT.LEFT);
    column.getColumn().setAlignment(SWT.LEFT);
    column.getColumn().setText("Value");
    column.getColumn().setWidth(350);
    column.setLabelProvider(new TreeLabelProvider(TreeLabelProvider.ColumnType.VALUE));

    setDescription("Preview and confirm the pending changes.");
    setControl(composite);
    setPageComplete(false);
}