Examples with ILayoutMetaData org.eclipse.elk.core.data.ILayoutMetaData used on opensource projects

Example 1 with ILayoutMetaData

use of org.eclipse.elk.core.data.ILayoutMetaData in project elk by eclipse.

the class AlgorithmSelectionDialog method createSelectionTree.

/**
 * Create the dialog area that displays the selection tree and filter text.
 *
 * @param parent the parent composite
 * @return the control for the selection area
 */
private Control createSelectionTree(final Composite parent) {
    Composite composite = new Composite(parent, SWT.NONE);
    // create filter text
    final Text filterText = new Text(composite, SWT.BORDER);
    filterText.setText(Messages.getString("elk.ui.59"));
    filterText.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
    filterText.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_GRAY));
    // create tree viewer
    final TreeViewer treeViewer = new TreeViewer(composite, SWT.SINGLE | SWT.V_SCROLL | SWT.BORDER);
    final AlgorithmContentProvider contentProvider = new AlgorithmContentProvider();
    treeViewer.setContentProvider(contentProvider);
    treeViewer.setLabelProvider(new LabelProvider() {

        @Override
        public String getText(final Object element) {
            if (element instanceof LayoutAlgorithmData) {
                LayoutAlgorithmData algoData = (LayoutAlgorithmData) element;
                String bundleName = algoData.getBundleName();
                if (bundleName == null) {
                    return algoData.getName();
                } else {
                    return algoData.getName() + " (" + bundleName + ")";
                }
            } else if (element instanceof LayoutCategoryData) {
                LayoutCategoryData typeData = (LayoutCategoryData) element;
                if (typeData.getName() == null) {
                    return "Other";
                } else {
                    return typeData.getName();
                }
            }
            return super.getText(element);
        }
    });
    treeViewer.setComparator(new ViewerComparator() {

        public int category(final Object element) {
            if (element instanceof LayoutCategoryData) {
                LayoutCategoryData typeData = (LayoutCategoryData) element;
                // the "Other" layout type has empty identifier and is put to the bottom
                return typeData.getId().length() == 0 ? 1 : 0;
            }
            return super.category(element);
        }
    });
    treeViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
    treeViewer.setInput(LayoutMetaDataService.getInstance());
    treeViewer.expandAll();
    treeViewer.addDoubleClickListener(new IDoubleClickListener() {

        public void doubleClick(final DoubleClickEvent event) {
            okPressed();
        }
    });
    // set up a filter on the tree viewer using the filter text
    final Maybe<Boolean> filterChanged = new Maybe<Boolean>(Boolean.FALSE);
    final Maybe<Boolean> filterLeft = new Maybe<Boolean>(Boolean.FALSE);
    filterText.addModifyListener(new ModifyListener() {

        public void modifyText(final ModifyEvent e) {
            if (!filterChanged.get()) {
                filterChanged.set(Boolean.TRUE);
                filterText.setForeground(null);
                int pos = filterText.getCaretPosition();
                String newText = filterText.getText(pos - 1, pos - 1);
                filterText.setText(newText);
                filterText.setSelection(pos);
            } else {
                contentProvider.updateFilter(filterText.getText());
                treeViewer.refresh();
                treeViewer.expandAll();
                ILayoutMetaData selected = contentProvider.getBestFilterMatch();
                if (selected != null) {
                    treeViewer.setSelection(new StructuredSelection(selected));
                }
            }
        }
    });
    filterText.addFocusListener(new FocusListener() {

        public void focusGained(final FocusEvent e) {
            if (filterLeft.get() && !filterChanged.get()) {
                filterChanged.set(Boolean.TRUE);
                filterText.setForeground(null);
                filterText.setText("");
            }
        }

        public void focusLost(final FocusEvent e) {
            filterLeft.set(Boolean.TRUE);
        }
    });
    treeViewer.addFilter(new ViewerFilter() {

        public boolean select(final Viewer viewer, final Object parentElement, final Object element) {
            return contentProvider.applyFilter(element);
        }
    });
    // add a selection listener to the tree so that the selected element is displayed
    treeViewer.addSelectionChangedListener(new ISelectionChangedListener() {

        public void selectionChanged(final SelectionChangedEvent event) {
            IStructuredSelection selection = (IStructuredSelection) event.getSelection();
            Object element = selection.getFirstElement();
            if (element instanceof ILayoutMetaData) {
                updateValue((ILayoutMetaData) element);
            }
        }
    });
    composite.setLayout(new GridLayout());
    GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
    gridData.minimumWidth = SELECTION_WIDTH;
    composite.setLayoutData(gridData);
    // register all selection listeners that have been stored in a list
    selectionProvider = treeViewer;
    for (ISelectionChangedListener listener : selectionListeners) {
        selectionProvider.addSelectionChangedListener(listener);
    }
    return composite;
}

Example 2 with ILayoutMetaData

use of org.eclipse.elk.core.data.ILayoutMetaData in project elk by eclipse.

the class AlgorithmSelectionDialog method createDialogArea.

@Override
protected Control createDialogArea(final Composite parent) {
    Composite composite = (Composite) super.createDialogArea(parent);
    ((GridLayout) composite.getLayout()).numColumns = 2;
    createSelectionTree(composite);
    createDescriptionArea(composite);
    // set the initial selection according to the current layouter hint
    if (layouterHint != null) {
        LayoutMetaDataService layoutServices = LayoutMetaDataService.getInstance();
        ILayoutMetaData layoutData = layoutServices.getAlgorithmData(layouterHint);
        if (layoutData == null) {
            layoutData = layoutServices.getCategoryData(layouterHint);
        }
        if (layoutData != null) {
            selectionProvider.setSelection(new StructuredSelection(layoutData));
        }
    }
    return composite;
}