Java tutorial
/******************************************************************************* * Copyright (c) 2006, 2010 Tom Schindl and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Tom Schindl - initial API and implementation *******************************************************************************/ import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.CheckboxCellEditor; import org.eclipse.jface.viewers.ColumnLabelProvider; import org.eclipse.jface.viewers.ColumnViewerEditor; import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent; import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy; import org.eclipse.jface.viewers.EditingSupport; import org.eclipse.jface.viewers.FocusCellOwnerDrawHighlighter; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.TreeViewerColumn; import org.eclipse.jface.viewers.TreeViewerEditor; import org.eclipse.jface.viewers.TreeViewerFocusCellManager; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.jface.viewers.ViewerRow; import org.eclipse.swt.SWT; import org.eclipse.swt.events.TraverseEvent; import org.eclipse.swt.events.TraverseListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; /** * Demonstrate how to work-around 3.3.1 limitation when it comes to TAB-Traversal and * checkbox editors. 3.4 will hopefully provide provide an out-of-the-box fix see bug 198502 * * @author Tom Schindl <tom.schindl@bestsolution.at> * */ public class Snippet048TreeViewerTabWithCheckboxFor3_3 { public Snippet048TreeViewerTabWithCheckboxFor3_3(final Shell shell) { final TreeViewer v = new TreeViewer(shell, SWT.BORDER | SWT.FULL_SELECTION); v.getTree().setLinesVisible(true); v.getTree().setHeaderVisible(true); final TreeViewerFocusCellManager mgr = new TreeViewerFocusCellManager(v, new FocusCellOwnerDrawHighlighter(v)); ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(v) { protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) { return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL || event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION || (event.eventType == ColumnViewerEditorActivationEvent.KEY_PRESSED && (event.keyCode == SWT.CR || event.character == ' ')) || event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC; } }; TreeViewerEditor.create(v, mgr, actSupport, ColumnViewerEditor.TABBING_HORIZONTAL | ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR | ColumnViewerEditor.TABBING_VERTICAL | ColumnViewerEditor.KEYBOARD_ACTIVATION); final TextCellEditor textCellEditor = new TextCellEditor(v.getTree()); final CheckboxCellEditor checkboxCellEditor = new CheckboxCellEditor(v.getTree()); TreeViewerColumn column = new TreeViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setMoveable(true); column.getColumn().setText("Column 1"); column.setLabelProvider(new ColumnLabelProvider() { public String getText(Object element) { return "Column 1 => " + element.toString(); } }); column.setEditingSupport(new EditingSupport(v) { protected boolean canEdit(Object element) { return false; } protected CellEditor getCellEditor(Object element) { return textCellEditor; } protected Object getValue(Object element) { return ((MyModel) element).counter + ""; } protected void setValue(Object element, Object value) { ((MyModel) element).counter = Integer.parseInt(value.toString()); v.update(element, null); } }); column = new TreeViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setMoveable(true); column.getColumn().setText("Column 2"); column.setLabelProvider(new ColumnLabelProvider() { public String getText(Object element) { return "Column 2 => " + element.toString(); } }); column.setEditingSupport(new EditingSupport(v) { protected boolean canEdit(Object element) { return true; } protected CellEditor getCellEditor(Object element) { return textCellEditor; } protected Object getValue(Object element) { return ((MyModel) element).counter + ""; } protected void setValue(Object element, Object value) { ((MyModel) element).counter = Integer.parseInt(value.toString()); v.update(element, null); } }); column = new TreeViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setMoveable(true); column.getColumn().setText("Column 3"); column.setLabelProvider(new ColumnLabelProvider() { public String getText(Object element) { return ((MyModel) element).bool + ""; } }); column.setEditingSupport(new EditingSupport(v) { protected boolean canEdit(Object element) { return true; } protected CellEditor getCellEditor(Object element) { return checkboxCellEditor; } protected Object getValue(Object element) { return new Boolean(((MyModel) element).bool); } protected void setValue(Object element, Object value) { ((MyModel) element).bool = ((Boolean) value).booleanValue(); v.update(element, null); } }); v.setContentProvider(new MyContentProvider()); v.setInput(createModel()); v.getControl().addTraverseListener(new TraverseListener() { public void keyTraversed(TraverseEvent e) { if ((e.detail == SWT.TRAVERSE_TAB_NEXT || e.detail == SWT.TRAVERSE_TAB_PREVIOUS) && mgr.getFocusCell().getColumnIndex() == 2) { ColumnViewerEditor editor = v.getColumnViewerEditor(); ViewerCell cell = mgr.getFocusCell(); try { Method m = ColumnViewerEditor.class.getDeclaredMethod("processTraverseEvent", new Class[] { int.class, ViewerRow.class, TraverseEvent.class }); m.setAccessible(true); m.invoke(editor, new Object[] { new Integer(cell.getColumnIndex()), cell.getViewerRow(), e }); } catch (SecurityException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (NoSuchMethodException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IllegalArgumentException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IllegalAccessException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (InvocationTargetException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } } }); } private MyModel createModel() { MyModel root = new MyModel(0, null); root.counter = 0; MyModel tmp; MyModel subItem; for (int i = 1; i < 10; i++) { tmp = new MyModel(i, root); root.child.add(tmp); for (int j = 1; j < i; j++) { subItem = new MyModel(j, tmp); subItem.child.add(new MyModel(j * 100, subItem)); tmp.child.add(subItem); } } return root; } public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); new Snippet048TreeViewerTabWithCheckboxFor3_3(shell); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } private class MyContentProvider implements ITreeContentProvider { public Object[] getElements(Object inputElement) { return ((MyModel) inputElement).child.toArray(); } public void dispose() { } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } public Object[] getChildren(Object parentElement) { return getElements(parentElement); } public Object getParent(Object element) { if (element == null) { return null; } return ((MyModel) element).parent; } public boolean hasChildren(Object element) { return ((MyModel) element).child.size() > 0; } } public class MyModel { public MyModel parent; public ArrayList child = new ArrayList(); public int counter; public boolean bool; public MyModel(int counter, MyModel parent) { this.parent = parent; this.counter = counter; } public String toString() { String rv = "Item "; if (parent != null) { rv = parent.toString() + "."; } rv += counter; return rv; } } }