Snippet80.java Source code

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Here is the source code for Snippet80.java

Source

/*
 * Tree example snippet: limit selection to items that match a pattern
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class Snippet80 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        final Tree tree = new Tree(shell, SWT.BORDER | SWT.MULTI);
        for (int i = 0; i < 2; i++) {
            TreeItem item = new TreeItem(tree, SWT.NONE);
            item.setText("item " + i);
            for (int j = 0; j < 2; j++) {
                TreeItem subItem = new TreeItem(item, SWT.NONE);
                subItem.setText("item " + j);
                for (int k = 0; k < 2; k++) {
                    TreeItem subsubItem = new TreeItem(subItem, SWT.NONE);
                    subsubItem.setText("item " + k);
                }
            }
        }

        tree.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                TreeItem[] selection = tree.getSelection();
                TreeItem[] revisedSelection = new TreeItem[0];
                for (int i = 0; i < selection.length; i++) {
                    String text = selection[i].getText();
                    if (text.indexOf("1") > 0) {
                        TreeItem[] newSelection = new TreeItem[revisedSelection.length + 1];
                        System.arraycopy(revisedSelection, 0, newSelection, 0, revisedSelection.length);
                        newSelection[revisedSelection.length] = selection[i];
                        revisedSelection = newSelection;
                    }
                }
                tree.setSelection(revisedSelection);
            }
        });

        shell.setSize(300, 300);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}