Java tutorial
/******************************************************************************* * Copyright (c) 2005 The Regents of the University of California. * This material was produced under U.S. Government contract W-7405-ENG-36 * for Los Alamos National Laboratory, which is operated by the University * of California for the U.S. Department of Energy. The U.S. Government has * rights to use, reproduce, and distribute this software. NEITHER THE * GOVERNMENT NOR THE UNIVERSITY MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR * ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE. If software is modified * to produce derivative works, such modified software should be clearly marked, * so as not to confuse it with the version available from LANL. * * Additionally, 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 * * LA-CC 04-115 *******************************************************************************/ package org.eclipse.ptp.debug.internal.ui.views.variable; import org.eclipse.core.runtime.Assert; import org.eclipse.core.runtime.ListenerList; import org.eclipse.jface.util.SafeRunnable; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.ICheckable; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.ptp.debug.internal.ui.PixelConverter; import org.eclipse.ptp.debug.ui.messages.Messages; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import org.eclipse.swt.widgets.Widget; /** * @author Clement chu */ public class PVariableCheckboxTableViewer extends TableViewer implements ICheckable { private ListenerList checkStateListeners = new ListenerList(); private ICheckProvider checkProvider = null; // String constants protected static final String YES_VALUE = Messages.PVariableCheckboxTableViewer_0; protected static final String NO_VALUE = Messages.PVariableCheckboxTableViewer_1; // Column properties private static final String CP_NAME = "name"; //$NON-NLS-1$ private static final String CP_JOB = "job"; //$NON-NLS-1$ // Column labels private static final String CL_NAME = Messages.PVariableCheckboxTableViewer_2; private static final String CL_JOB = Messages.PVariableCheckboxTableViewer_3; /** * Constructor for PExpressionViewer * * @param parent * @param style */ public PVariableCheckboxTableViewer(Composite parent, int style) { super(parent, SWT.CHECK | style); Table table = getTable(); table.setLinesVisible(true); table.setHeaderVisible(true); table.setLayoutData(new GridData(GridData.FILL_BOTH)); // Create the table columns new TableColumn(table, SWT.NULL); new TableColumn(table, SWT.NULL); new TableColumn(table, SWT.NULL); TableColumn[] columns = table.getColumns(); columns[0].setResizable(false); columns[1].setResizable(true); columns[2].setResizable(true); columns[0].setText(""); //$NON-NLS-1$ columns[1].setText(CL_NAME); columns[2].setText(CL_JOB); columns[0].addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { ((PVariableViewerSorter) getSorter()).setColumn(0); refresh(); } }); columns[1].addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { ((PVariableViewerSorter) getSorter()).setColumn(1); refresh(); } }); columns[2].addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent event) { ((PVariableViewerSorter) getSorter()).setColumn(2); refresh(); } }); PixelConverter pc = new PixelConverter(parent); columns[0].setWidth(pc.convertWidthInCharsToPixels(3)); columns[1].setWidth(pc.convertWidthInCharsToPixels(20)); columns[2].setWidth(pc.convertWidthInCharsToPixels(20)); setColumnProperties(new String[] { "", CP_NAME, CP_JOB }); //$NON-NLS-1$ } public void addCheckStateListener(ICheckStateListener listener) { checkStateListeners.add(listener); } public void removeCheckStateListener(ICheckStateListener listener) { checkStateListeners.remove(listener); } public void setCheckProvider(ICheckProvider checkProvider) { this.checkProvider = checkProvider; } private void fireCheckStateChanged(final CheckStateChangedEvent event) { Object[] array = checkStateListeners.getListeners(); for (int i = 0; i < array.length; i++) { final ICheckStateListener l = (ICheckStateListener) array[i]; SafeRunnable.run(new SafeRunnable() { public void run() { l.checkStateChanged(event); } }); } } public void handleSelect(SelectionEvent event) { if (event.detail == SWT.CHECK) { super.handleSelect(event); // this will change the current selection TableItem item = (TableItem) event.item; Object data = item.getData(); if (data != null) { fireCheckStateChanged(new CheckStateChangedEvent(this, data, item.getChecked())); } } else { super.handleSelect(event); } } public boolean getChecked(Object element) { Widget widget = findItem(element); if (widget instanceof TableItem) { return ((TableItem) widget).getChecked(); } return false; } public boolean setChecked(Object element, boolean state) { Assert.isNotNull(element); Widget widget = findItem(element); if (widget instanceof TableItem) { ((TableItem) widget).setChecked(state); return true; } return false; } protected void doUpdateItem(Widget widget, Object element, boolean fullMap) { super.doUpdateItem(widget, element, fullMap); if (widget instanceof TableItem) { if (checkProvider != null) { ((TableItem) widget).setChecked(checkProvider.isCheck(element)); } } } }