* Copyright (c) 2009, 2014 IBM Corporation and others.

 * Copyright (c) 2009, 2015 IBM Corporation and others.

		fSelectionCount = SWTFactory.createLabel(parent, NLS.bind(Messages.EditIUContainerPage_itemsSelected, Integer.toString(0)), 1);

		Composite buttonParent = new Composite(parent, SWT.NONE);

		GridLayout gridLayout = new GridLayout();

		gridLayout.numColumns = 3;

		gridLayout.marginWidth = 0;

		gridLayout.horizontalSpacing = 10;

		buttonParent.setLayout(gridLayout);

		GridData gridData = new GridData(SWT.FILL, SWT.DEFAULT, true, false);

		buttonParent.setLayoutData(gridData);

		Button selectAll = new Button(buttonParent, SWT.PUSH);

		selectAll.setText(ProvUIMessages.SelectableIUsPage_Select_All);

		GridData selectAllData = setButtonLayoutData(selectAll);

		selectAllData.widthHint = 90;

		selectAll.addListener(SWT.Selection, new Listener() {

			@Override

			public void handleEvent(Event event) {

				setAllChecked(true);

			}

		});

		Button deselectAll = new Button(buttonParent, SWT.PUSH);

		deselectAll.setText(ProvUIMessages.SelectableIUsPage_Deselect_All);

		GridData deselectAllData = setButtonLayoutData(deselectAll);

		deselectAllData.widthHint = 90;

		deselectAll.addListener(SWT.Selection, new Listener() {

			@Override

			public void handleEvent(Event event) {

				setAllChecked(false);

			}

		});

		fSelectionCount = SWTFactory.createLabel(buttonParent, NLS.bind(Messages.EditIUContainerPage_itemsSelected, Integer.toString(0)), 1);

		GridData labelData = new GridData();

		labelData.widthHint = 100;

		fSelectionCount.setLayoutData(labelData);

	}

	@SuppressWarnings("deprecation")

	void setAllChecked(boolean checked) {

		if (checked) {

			// TODO ideally there should be API on AvailableIUGroup to do this.

			// This is reachy and too knowledgeable of the group's implementation.

			fAvailableIUGroup.getCheckboxTreeViewer().setAllChecked(checked);

			// to ensure that the listeners get processed.

			fAvailableIUGroup.setChecked(fAvailableIUGroup.getCheckboxTreeViewer().getCheckedElements());

		} else {

			fAvailableIUGroup.setChecked(new Object[0]);

		}

		updateSelection();

	}

	void updateSelection() {

		int count = fAvailableIUGroup.getCheckedLeafIUs().length;

		setPageComplete(count > 0);

		if (count == 0) {

			fSelectionCount.setText(""); //$NON-NLS-1$

		} else {

			String message = count == 1 ? ProvUIMessages.AvailableIUsPage_SingleSelectionCount : ProvUIMessages.AvailableIUsPage_MultipleSelectionCount;

			fSelectionCount.setText(NLS.bind(message, Integer.toString(count)));

		}