examples/org.eclipse.jface.snippets/Eclipse JFace Snippets/org/eclipse/jface/snippets/viewers/Snippet036FocusBorderCellHighlighter.java

/*******************************************************************************
 * 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
 *     Lars Vogel <Lars.Vogel@vogella.com> - Bug 413427, 475361
 *     Jeanderson Candido <http://jeandersonbc.github.io> - Bug 414565
 *     Simon Scholz <simon.scholz@vogella.com> - Bug 442747
 *******************************************************************************/

package org.eclipse.jface.snippets.viewers;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ArrayContentProvider;
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.ColumnViewerEditorActivationEvent;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TableViewerEditor;
import org.eclipse.jface.viewers.TableViewerFocusCellManager;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;

/**
 * Example of a different focus cell rendering with a simply focus border
 *
 */
public class Snippet036FocusBorderCellHighlighter {

	public static boolean flag = true;

	private class MyModel {
		public int counter;

		public MyModel(int counter) {
			this.counter = counter;
		}

		@Override
		public String toString() {
			return "Item " + this.counter;
		}
	}

	private class MyEditingSupport extends EditingSupport {

		private String property;

		public MyEditingSupport(ColumnViewer viewer, String property) {
			super(viewer);
			this.property = property;
		}

		@Override
		protected CellEditor getCellEditor(Object element) {
			return new TextCellEditor((Composite) getViewer().getControl());
		}

		@Override
		protected boolean canEdit(Object element) {
			return true;
		}

		@Override
		protected Object getValue(Object element) {
			return "Column " + property + " => " + element.toString();
		}

		@Override
		protected void setValue(Object element, Object value) {

		}

	}

	private class MyColumnLabelProvider extends ColumnLabelProvider {

		private int columnIndex;
		private Table table;

		public MyColumnLabelProvider(Table table, int columnIndex) {
			this.table = table;
			this.columnIndex = columnIndex;
		}

		@Override
		public String getText(Object element) {
			return "Column " + table.getColumnOrder()[columnIndex] + " => " + element.toString();
		}
	}

	public Snippet036FocusBorderCellHighlighter(Shell shell) {
		final TableViewer v = new TableViewer(shell, SWT.BORDER
				| SWT.FULL_SELECTION);
		v.setContentProvider(ArrayContentProvider.getInstance());

		TableViewerFocusCellManager focusCellManager = new TableViewerFocusCellManager(
				v, new FocusBorderCellHighlighter(v));
		ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(
				v) {
			@Override
			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.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
			}
		};

		int feature = ColumnViewerEditor.TABBING_HORIZONTAL
				| ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
				| ColumnViewerEditor.TABBING_VERTICAL
				| ColumnViewerEditor.KEYBOARD_ACTIVATION;

		TableViewerEditor.create(v, focusCellManager, actSupport, feature);

		String[] columLabels = { "Column 1", "Column 2", "Column 3" };
		int property = 0;
		for (String label : columLabels) {
			createColumnFor(v, label, property++);
		}
		v.setInput(createModel());
		v.getTable().setLinesVisible(true);
		v.getTable().setHeaderVisible(true);
	}

	private void createColumnFor(TableViewer v, String label, int columnIndex) {

		TableViewerColumn viewerColumn = new TableViewerColumn(v, SWT.NONE);
		viewerColumn.getColumn().setWidth(200);
		viewerColumn.getColumn().setMoveable(true);
		viewerColumn.getColumn().setText(label);

		viewerColumn.setEditingSupport(new MyEditingSupport(v, columnIndex + ""));
		viewerColumn.setLabelProvider(new MyColumnLabelProvider(v.getTable(), columnIndex));
	}

	private List<MyModel> createModel() {
		List<MyModel> elements = new ArrayList<>();

		for (int i = 0; i < 10; i++) {
			elements.add(new MyModel(i));
		}
		return elements;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Display display = new Display();

		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		new Snippet036FocusBorderCellHighlighter(shell);
		shell.open();

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

}