Java Code Examples for org.eclipse.jface.viewers.ITreeContentProvider#getParent()

@Override
protected boolean isLeafMatch(Viewer viewer, Object element) {
    Object node = element;
    StructuredViewer structuredViewer = (StructuredViewer) viewer;
    ITableLabelProvider labelProvider = (ITableLabelProvider) structuredViewer.getLabelProvider();
    ITreeContentProvider treeContentProvider = (ITreeContentProvider) structuredViewer.getContentProvider();

    // Ensure the tree element and its parent(s) match the filter text
    for (Predicate<String> p : fPredicates) {
        // Retrieve tree element text and make verification. Text is at column 0
        String labelText = labelProvider.getColumnText(node, 0);
        if (labelText == null || !p.test(labelText)) {
            return false;
        }

        // Retrieve parent element
        node = treeContentProvider.getParent(node);
    }
    return true;
}
 

private String getQualification(Object element) {
	StringBuffer res= new StringBuffer();

	ITreeContentProvider provider= (ITreeContentProvider) fPage.getViewer().getContentProvider();
	Object visibleParent= provider.getParent(element);
	Object realParent= fContentProvider.getParent(element);
	Object lastElement= element;
	while (realParent != null && !(realParent instanceof IJavaModel) && !realParent.equals(visibleParent)) {
		if (!isSameInformation(realParent, lastElement))  {
			res.append(JavaElementLabels.CONCAT_STRING).append(internalGetText(realParent));
		}
		lastElement= realParent;
		realParent= fContentProvider.getParent(realParent);
	}
	return res.toString();
}
 

/**
 * Ensure that the state of the checkbox and its parents are correct.
 *
 * TODO: Create utils method for use in other checkboxes.
 *
 * @param element
 *            Tree element from which the verification needs to be made
 */
private void maintainCheckIntegrity(final Object element) {
    CheckboxTreeViewer checkboxTreeViewer = getCheckboxTreeViewer();
    ITreeContentProvider contentProvider = (ITreeContentProvider) checkboxTreeViewer.getContentProvider();
    boolean allChecked = true;
    boolean oneChecked = false;
    boolean oneGrayed = false;

    for (Object child : contentProvider.getChildren(element)) {
        if (checkboxTreeViewer.testFindItem(child) == null) {
            continue;
        }

        boolean checked = getChecked(child);
        oneChecked |= checked;
        allChecked &= checked;
        oneGrayed |= (checked && getGrayed(child));

        if (oneGrayed || (oneChecked && !allChecked)) {
            setGrayed(element, true);
            setChecked(element, true);
        } else {
            setGrayed(element, false);
            setChecked(element, allChecked);
        }
    }

    Object parentElement = contentProvider.getParent(element);
    if (parentElement != null) {
        maintainCheckIntegrity(parentElement);
    }
}
 

/**
 * Generates the parent chain of the given element.
 * 
 * @param element element to build the parent chain for
 * @return the first index of an item in fBreadcrumbItems which is not part of
 *         the chain
 */
private int buildItemChain(Object element) {
  if (element == null)
    return 0;

  ITreeContentProvider contentProvider = (ITreeContentProvider) getContentProvider();
  Object parent = contentProvider.getParent(element);

  int index = buildItemChain(parent);

  BreadcrumbItem item;
  if (index < fBreadcrumbItems.size()) {
    item = (BreadcrumbItem) fBreadcrumbItems.get(index);
    if (item.getData() != null)
      unmapElement(item.getData());
  } else {
    item = createItem();
    fBreadcrumbItems.add(item);
  }

  if (equals(element, item.getData())) {
    update(element, null);
  } else {
    item.setData(element);
    item.refresh();
  }
  if (parent == null) {
    // don't show the models root
    item.setDetailsVisible(false);
  }

  mapElement(element, item);

  return index + 1;
}
 

private boolean isSelected(Object parent, Object element, IContentProvider contentProvider, ViewerFilter filter) {
	if (filter instanceof EmptyLibraryContainerFilter) // workaround for https://bugs.eclipse.org/341109
		return true;
    if (contentProvider instanceof ITreeContentProvider) {
        // the element and all its parents have to be selected
        ITreeContentProvider provider = (ITreeContentProvider) contentProvider;
        while (element != null && !(element instanceof IJavaModel)) {
            if (!filter.select(fViewer, parent, element))
                return false;
            element= provider.getParent( element);
        }
        return true;
    }
    return filter.select(fViewer, parent, element);
}
 

/**
 * Generates the parent chain of the given element.
 *
 * @param element element to build the parent chain for
 * @return the first index of an item in fBreadcrumbItems which is not part of the chain
 */
private int buildItemChain(Object element) {
	if (element == null)
		return 0;

	ITreeContentProvider contentProvider= (ITreeContentProvider) getContentProvider();
	Object parent= contentProvider.getParent(element);

	int index= buildItemChain(parent);

	BreadcrumbItem item;
	if (index < fBreadcrumbItems.size()) {
		item= fBreadcrumbItems.get(index);
		if (item.getData() != null)
			unmapElement(item.getData());
	} else {
		item= createItem();
		fBreadcrumbItems.add(item);
	}

	if (equals(element, item.getData())) {
		update(element, null);
	} else {
		item.setData(element);
		item.refresh();
	}
	if (parent == null) {
		//don't show the models root
		item.setDetailsVisible(false);
	}

	mapElement(element, item);

	return index + 1;
}
 

/**
 * Generates the parent chain of the given element.
 * 
 * @param element
 *            element to build the parent chain for
 * @return the first index of an item in fBreadcrumbItems which is not part
 *         of the chain
 */
protected int buildItemChain( Object element )
{
	if ( element == null )
		return 0;

	ITreeContentProvider contentProvider = (ITreeContentProvider) getContentProvider( );

	Object parent = contentProvider.getParent( element );

	if ( parent == element )
		return 0;
	int index = buildItemChain( parent );

	BreadcrumbItem item;
	if ( index < fBreadcrumbItems.size( ) )
	{
		item = (BreadcrumbItem) fBreadcrumbItems.get( index );
		if ( item.getData( ) != null )
			unmapElement( item.getData( ) );
	}
	else
	{
		item = createItem( );
		fBreadcrumbItems.add( item );
	}

	if ( element != null && equals( element, item.getData( ) ) )
	{
		update( element, null );
	}
	else
	{
		item.setData( element );
		item.refresh( );
	}
	if ( parent == null )
	{
		// don't show the models root
		item.setDetailsVisible( true );
		item.setShowText( false );
		rootItem = item;
	}

	mapElement( element, item );

	return index + 1;
}