Java tutorial
/******************************************************************************* * Copyright (c) 2006, 2015 Tom Schindl and others. * * This program and the accompanying materials * are made available under the terms of the Eclipse Public License 2.0 * which accompanies this distribution, and is available at * https://www.eclipse.org/legal/epl-2.0/ * * SPDX-License-Identifier: EPL-2.0 * * Contributors: * Tom Schindl - initial API and implementation * Jeanderson Candido <http://jeandersonbc.github.io> - Bug 414565 * Lars Vogel <Lars.Vogel@vogella.com> - Bug 475361 *******************************************************************************/ package org.eclipse.jface.snippets.viewers; import java.util.ArrayList; import java.util.List; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.ColumnLabelProvider; import org.eclipse.jface.viewers.ColumnViewer; import org.eclipse.jface.viewers.ColumnViewerEditor; 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.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class Snippet056BooleanCellEditor { public Snippet056BooleanCellEditor(final Shell shell) { final TreeViewer v = new TreeViewer(shell, SWT.BORDER | SWT.FULL_SELECTION); v.getTree().setLinesVisible(true); v.getTree().setHeaderVisible(true); FocusCellOwnerDrawHighlighter h = new FocusCellOwnerDrawHighlighter(v) { @Override protected Color getSelectedCellBackgroundColorNoFocus(ViewerCell cell) { return shell.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND); } @Override protected Color getSelectedCellForegroundColorNoFocus(ViewerCell cell) { return shell.getDisplay().getSystemColor(SWT.COLOR_WIDGET_FOREGROUND); } }; TreeViewerFocusCellManager focusCellManager = new TreeViewerFocusCellManager(v, h); ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(v); int feature = ColumnViewerEditor.TABBING_HORIZONTAL | ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR | ColumnViewerEditor.TABBING_VERTICAL | ColumnViewerEditor.KEYBOARD_ACTIVATION; TreeViewerEditor.create(v, focusCellManager, actSupport, feature); final TextCellEditor textCellEditor = new TextCellEditor(v.getTree()); final BooleanCellEditor booleanCellEditor = new BooleanCellEditor(v.getTree()); TreeViewerColumn column = createColumnFor(v, "Column 1"); column.setLabelProvider(new MyColumnLabelProvider("Column 1")); column.setEditingSupport(new MyEditingSupport(v, v, textCellEditor)); column = createColumnFor(v, "Column 2"); column.setLabelProvider(new ColumnLabelProvider() { @Override public String getText(Object element) { return ((MyModel) element).flag + ""; } }); column.setEditingSupport(new EditingSupport(v) { @Override protected boolean canEdit(Object element) { return true; } @Override protected CellEditor getCellEditor(Object element) { return booleanCellEditor; } @Override protected Object getValue(Object element) { return Boolean.valueOf(((MyModel) element).flag); } @Override protected void setValue(Object element, Object value) { ((MyModel) element).flag = ((Boolean) value).booleanValue(); v.update(element, null); } }); column = createColumnFor(v, "Column 3"); column.setLabelProvider(new MyColumnLabelProvider("Column 3")); column.setEditingSupport(new MyEditingSupport(v, v, textCellEditor)); v.setContentProvider(new MyContentProvider()); v.setInput(createModel()); } private TreeViewerColumn createColumnFor(final TreeViewer viewer, String label) { TreeViewerColumn column = new TreeViewerColumn(viewer, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setMoveable(true); column.getColumn().setText(label); return column; } 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 Snippet056BooleanCellEditor(shell); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } private final class MyEditingSupport extends EditingSupport { private final TreeViewer v; private final TextCellEditor textCellEditor; private MyEditingSupport(ColumnViewer viewer, TreeViewer v, TextCellEditor textCellEditor) { super(viewer); this.v = v; this.textCellEditor = textCellEditor; } @Override protected boolean canEdit(Object element) { return true; } @Override protected CellEditor getCellEditor(Object element) { return textCellEditor; } @Override protected Object getValue(Object element) { return ((MyModel) element).counter + ""; } @Override protected void setValue(Object element, Object value) { ((MyModel) element).counter = Integer.parseInt(value.toString()); v.update(element, null); } } private final class MyColumnLabelProvider extends ColumnLabelProvider { private String prefix; public MyColumnLabelProvider(String prefix) { this.prefix = prefix; } @Override public String getText(Object element) { return this.prefix + " => " + element; } } private class MyContentProvider implements ITreeContentProvider { @Override public Object[] getElements(Object inputElement) { return ((MyModel) inputElement).child.toArray(); } @Override public void dispose() { } @Override public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } @Override public Object[] getChildren(Object parentElement) { return getElements(parentElement); } @Override public Object getParent(Object element) { if (element == null) { return null; } return ((MyModel) element).parent; } @Override public boolean hasChildren(Object element) { return ((MyModel) element).child.size() > 0; } } public class MyModel { public MyModel parent; public List<MyModel> child = new ArrayList<>(); public int counter; public boolean flag; public MyModel(int counter, MyModel parent) { this.parent = parent; this.counter = counter; this.flag = counter % 2 == 0; } @Override public String toString() { String rv = "Item "; if (parent != null) { rv = parent + "."; } rv += counter; return rv; } } }