Java tutorial
/*! * This program is free software; you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software * Foundation. * * You should have received a copy of the GNU Lesser General Public License along with this * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html * or from the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU Lesser General Public License for more details. * * Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved. */ package org.pentaho.pms.ui.concept.editor; import java.math.BigDecimal; import java.util.Map; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.FocusEvent; import org.eclipse.swt.events.FocusListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Text; import org.pentaho.pms.schema.concept.types.columnwidth.ColumnWidth; public class ColumnWidthPropertyEditorWidget extends AbstractPropertyEditorWidget implements FocusListener, ISelectionChangedListener { // ~ Static fields/initializers ====================================================================================== private static final Log logger = LogFactory.getLog(ColumnWidthPropertyEditorWidget.class); // ~ Instance fields ================================================================================================= private ComboViewer typeComboViewer; private Text width; Label typeLabel; Combo type; Label widthLabel; // ~ Constructors ==================================================================================================== public ColumnWidthPropertyEditorWidget(final Composite parent, final int style, final IConceptModel conceptModel, final String propertyId, final Map context) { super(parent, style, conceptModel, propertyId, context); refresh(); } // ~ Methods ========================================================================================================= protected void createContents(final Composite parent) { addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { ColumnWidthPropertyEditorWidget.this.widgetDisposed(e); } }); typeLabel = new Label(parent, SWT.NONE); typeLabel.setText("Column Width Type:"); //$NON-NLS-1$ type = new Combo(parent, SWT.READ_ONLY | SWT.BORDER); typeComboViewer = new ComboViewer(type); typeComboViewer.setContentProvider(new IStructuredContentProvider() { public Object[] getElements(final Object inputElement) { return (ColumnWidth[]) inputElement; } public void dispose() { } public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) { } }); typeComboViewer.setInput(ColumnWidth.types); typeComboViewer.setLabelProvider(new LabelProvider() { public Image getImage(final Object element) { // no images in this combo return null; } public String getText(final Object element) { return ((ColumnWidth) element).getDescription(); } }); FormData fdType = new FormData(); fdType.left = new FormAttachment(typeLabel, 10); fdType.top = new FormAttachment(0, 0); type.setLayoutData(fdType); FormData fdTypeLabel = new FormData(); fdTypeLabel.left = new FormAttachment(0, 0); fdTypeLabel.top = new FormAttachment(type, 0, SWT.CENTER); typeLabel.setLayoutData(fdTypeLabel); widthLabel = new Label(parent, SWT.NONE); widthLabel.setText("Column Width:"); //$NON-NLS-1$ width = new Text(parent, SWT.BORDER | SWT.SINGLE | SWT.LEFT); // only allow digits width.addListener(SWT.Verify, new Listener() { public void handleEvent(final Event e) { String string = e.text; char[] chars = new char[string.length()]; string.getChars(0, chars.length, chars, 0); for (int i = 0; i < chars.length; i++) { if (!(Character.isDigit(chars[i]))) { e.doit = false; return; } } } }); // width.setToolTipText(Messages.getString("ConceptPropertyColumnWidthWidget.USER_SELECT_PROPERTY_WIDTH", name)); //$NON-NLS-1$ FormData fdWidth = new FormData(); fdWidth.left = new FormAttachment(widthLabel, 10); fdWidth.right = new FormAttachment(100, 0); fdWidth.top = new FormAttachment(type, 10); width.setLayoutData(fdWidth); FormData fdWidthLabel = new FormData(); fdWidthLabel.left = new FormAttachment(0, 0); fdWidthLabel.top = new FormAttachment(width, 0, SWT.CENTER); widthLabel.setLayoutData(fdWidthLabel); typeComboViewer.addSelectionChangedListener(this); width.addFocusListener(this); } protected void widgetDisposed(final DisposeEvent e) { } public Object getValue() { IStructuredSelection selection = (IStructuredSelection) typeComboViewer.getSelection(); ColumnWidth columnWidth = (ColumnWidth) selection.getFirstElement(); int widthType = columnWidth.getType(); BigDecimal widthValue; try { widthValue = new BigDecimal(width.getText()); } catch (Exception e) { widthValue = new BigDecimal(0); } return new ColumnWidth(widthType, widthValue); } protected void setValue(final Object value) { if (value instanceof ColumnWidth) { ColumnWidth columnWidth = (ColumnWidth) value; typeComboViewer.setSelection(new StructuredSelection(ColumnWidth.getType(columnWidth.getCode()))); if (columnWidth.getWidth() != null) { width.setText(columnWidth.getWidth().toString()); } else { width.setText(""); } } } public String validate() { if (isEditable()) { try { new BigDecimal(width.getText()); } catch (NumberFormatException e) { return String.format("%s is not a valid number.", PredefinedVsCustomPropertyHelper.getDescription(getPropertyId())); } } return null; } public void refresh() { refreshOverrideButton(); typeComboViewer.removeSelectionChangedListener(this); width.setEnabled(isEditable()); widthLabel.setEnabled(isEditable()); typeLabel.setEnabled(isEditable()); type.setEnabled(isEditable()); setValue(getProperty().getValue()); typeComboViewer.addSelectionChangedListener(this); } public void focusGained(FocusEvent arg0) { // TODO Auto-generated method stub } public void focusLost(FocusEvent arg0) { if (!getValue().equals(getProperty().getValue())) { putPropertyValue(); } } public void selectionChanged(SelectionChangedEvent arg0) { putPropertyValue(); } public void cleanup() { typeComboViewer.removeSelectionChangedListener(this); width.removeFocusListener(this); } }