Java tutorial
/******************************************************************************* * Copyright (c) 2006 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 *******************************************************************************/ package com.memtoreclipse.tutorial.jface.viewers.table.adv; import java.lang.reflect.Field; import java.util.ArrayList; import java.util.Arrays; import org.eclipse.jface.action.Action; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.ICellModifier; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Item; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.TableColumn; /** * Example of adding and removing columns in conjunction with JFace-Viewers * * @author Tom Schindl <tom.schindl@bestsolution.at> * @since 3.2 */ public class Snippet018TableViewerAddRemoveColumnsWithEditing { public class Person { public String givenname; public String surname; public String email; public Person(String givenname, String surname, String email) { this.givenname = givenname; this.surname = surname; this.email = email; } public String getValue(String name) { Field field; try { field = getClass().getDeclaredField(name); return (String) field.get(this); } catch (Exception e) { e.printStackTrace(); } return "ERROR"; } public void setValue(String name, String value) { Field field; try { field = getClass().getDeclaredField(name); field.set(this, value); } catch (Exception e) { e.printStackTrace(); } } } private class MyContentProvider implements IStructuredContentProvider { public Object[] getElements(Object inputElement) { return (Person[]) inputElement; } public void dispose() { } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } } public class MyLabelProvider extends LabelProvider implements ITableLabelProvider { private TableViewer viewer; public MyLabelProvider(TableViewer viewer) { this.viewer = viewer; } public Image getColumnImage(Object element, int columnIndex) { return null; } public String getColumnText(Object element, int columnIndex) { return ((Person) element).getValue(viewer.getColumnProperties()[columnIndex].toString()); } } public class MyCellModifier implements ICellModifier { private TableViewer viewer; public MyCellModifier(TableViewer viewer) { this.viewer = viewer; } public boolean canModify(Object element, String property) { return true; } public Object getValue(Object element, String property) { return ((Person) element).getValue(property); } public void modify(Object element, String property, Object value) { ((Person) ((Item) element).getData()).setValue(property, value.toString()); viewer.update(((Item) element).getData(), null); } } private int activeColumn = -1; public Snippet018TableViewerAddRemoveColumnsWithEditing(Shell shell) { final TableViewer v = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION); v.setLabelProvider(new MyLabelProvider(v)); v.setContentProvider(new MyContentProvider()); v.setCellEditors(new CellEditor[] { new TextCellEditor(v.getTable()), new TextCellEditor(v.getTable()), new TextCellEditor(v.getTable()) }); v.setCellModifier(new MyCellModifier(v)); v.setColumnProperties(new String[] { "givenname", "surname" }); TableColumn column = new TableColumn(v.getTable(), SWT.NONE); column.setWidth(200); column.setText("Givenname"); column = new TableColumn(v.getTable(), SWT.NONE); column.setWidth(200); column.setText("Surname"); Person[] model = createModel(); v.setInput(model); v.getTable().setLinesVisible(true); v.getTable().setHeaderVisible(true); addMenu(v); triggerColumnSelectedColumn(v); } private void triggerColumnSelectedColumn(final TableViewer v) { v.getTable().addMouseListener(new MouseAdapter() { public void mouseDown(MouseEvent e) { int x = 0; for (int i = 0; i < v.getTable().getColumnCount(); i++) { x += v.getTable().getColumn(i).getWidth(); if (e.x <= x) { activeColumn = i; break; } } } }); } private void addMenu(final TableViewer v) { final MenuManager mgr = new MenuManager(); final Action insertEmailBefore = new Action("Insert E-Mail before") { public void run() { addEmailColumn(v, activeColumn); } }; final Action insertEmailAfter = new Action("Insert E-Mail after") { public void run() { addEmailColumn(v, activeColumn + 1); } }; final Action removeEmail = new Action("Remove E-Mail") { public void run() { removeEmailColumn(v); } }; mgr.setRemoveAllWhenShown(true); mgr.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { if (v.getTable().getColumnCount() == 2) { manager.add(insertEmailBefore); manager.add(insertEmailAfter); } else { manager.add(removeEmail); } } }); v.getControl().setMenu(mgr.createContextMenu(v.getControl())); } private void removeEmailColumn(TableViewer v) { int emailIndex = -1; for (int i = 0; i < v.getColumnProperties().length; i++) { if (v.getColumnProperties()[i].toString().equals("email")) { emailIndex = i; break; } } ArrayList list = new ArrayList(Arrays.asList(v.getCellEditors())); list.remove(emailIndex); CellEditor[] editors = new CellEditor[list.size()]; list.toArray(editors); v.setCellEditors(editors); list = new ArrayList(Arrays.asList(v.getColumnProperties())); list.remove(emailIndex); String[] columnProperties = new String[list.size()]; list.toArray(columnProperties); v.setColumnProperties(columnProperties); v.getTable().getColumn(emailIndex).dispose(); v.refresh(); } private void addEmailColumn(TableViewer v, int columnIndex) { ArrayList list = new ArrayList(Arrays.asList(v.getCellEditors())); list.add(columnIndex, new TextCellEditor(v.getTable())); CellEditor[] editors = new CellEditor[list.size()]; list.toArray(editors); v.setCellEditors(editors); list = new ArrayList(Arrays.asList(v.getColumnProperties())); list.add(columnIndex, "email"); String[] columnProperties = new String[list.size()]; list.toArray(columnProperties); v.setColumnProperties(columnProperties); // 1. Add new column TableColumn column = new TableColumn(v.getTable(), SWT.NONE, columnIndex); column.setText("E-Mail"); // 2. Update the viewer v.refresh(); // 3. Make the colum visible column.setWidth(200); } private Person[] createModel() { Person[] persons = new Person[3]; persons[0] = new Person("Tom", "Schindl", "tom.schindl@bestsolution.at"); persons[1] = new Person("Boris", "Bokowski", "boris_bokowski@ca.ibm.com"); persons[2] = new Person("Tod", "Creasey", "tod_creasey@ca.ibm.com"); return persons; } /** * @param args */ public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); new Snippet018TableViewerAddRemoveColumnsWithEditing(shell); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } }