Examples with Filters org.springsource.ide.eclipse.commons.livexp.util.Filters used on opensource projects

Example 1 with Filters

use of org.springsource.ide.eclipse.commons.livexp.util.Filters in project eclipse-integration-commons by spring-projects.

the class SwtConnect method connectTextBasedFilter.

/**
 * Connect a filterbox model to a treeviewer. This assumes that the filter is text-based. The filter is applied to the labels of the elements in the tree.
 * <p>
 * For the viewer filter to work correctly the ITreeContentProvider must provide a proper implementation of the 'getParent' method. If getParent only
 * returns null the viewer filter will not be able to check whether an element should be shown when a parent element is selected by the search filter.
 * <p>
 * Note: you can use {@link TreeElementWrappingContentProvider} in order to ensure that ITreeContentProvider keeps track of parent nodes properly.
 */
public static void connectTextBasedFilter(TreeViewer viewer, LiveExpression<Filter<String>> searchBoxModel, LabelProvider labels, ITreeContentProvider treeContent) {
    TreeAwareViewerFilter viewerFilter = new TreeAwareViewerFilter(viewer, Filters.acceptAll(), labels, treeContent);
    Disposable disposable = searchBoxModel.onChange(UIValueListener.from((e, filter) -> {
        viewerFilter.setFilter(searchBoxModel.getValue());
        viewer.refresh(true);
    }));
    // TODO: what if there are existing filters?
    viewer.setFilters(viewerFilter);
    viewer.getControl().addDisposeListener(de -> {
        disposable.dispose();
    });
    Stylers stylers = new Stylers(viewer.getTree().getFont());
    viewer.getControl().addDisposeListener(de -> {
        disposable.dispose();
        stylers.dispose();
    });
    ILabelProvider baseLabels = (ILabelProvider) viewer.getLabelProvider();
    // Can't add bolding support without this! Ensure label provider is set before calling this method
    Assert.isNotNull(baseLabels);
    viewer.setLabelProvider(boldMatchedElements(stylers, baseLabels, Filters.delegatingTo(searchBoxModel)));
}