snippet019tablevieweraddremovecolumnswitheditingnewapi.java

对于可视的桌面开发系统的一些详细的设计资料

/*******************************************************************************
 * 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 org.eclipse.jface.snippets.viewers;


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.ColumnLabelProvider;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
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.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

/**
 * Explore the new API added in 3.3 and see how easily you can create reusable
 * components
 * 
 * @author Tom Schindl <[e-mail]>
 * @since 3.2
 */
public class Snippet019TableViewerAddRemoveColumnsWithEditingNewAPI {

	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;
		}
	}

	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) {

		}

	}

	

	private class GivenNameLabelProvider extends ColumnLabelProvider {
		public String getText(Object element) {
			return ((Person) element).givenname;
		}
	}
	
	private class GivenNameEditing extends EditingSupport {
		private TextCellEditor cellEditor;
		
		public GivenNameEditing(TableViewer viewer) {
			super(viewer);
			cellEditor = new TextCellEditor(viewer.getTable());
		}
		
		protected boolean canEdit(Object element) {
			return true;
		}
		
		protected CellEditor getCellEditor(Object element) {
			return cellEditor;
		}

		protected Object getValue(Object element) {
			return ((Person) element).givenname;
		}

		protected void setValue(Object element, Object value) {
			((Person) element).givenname = value.toString();
			getViewer().update(element, null);
		}
	}
	
	private class SurNameLabelProvider extends ColumnLabelProvider {
		public String getText(Object element) {
			return ((Person) element).surname;
		}
	}
	
	private class SurNameEditing extends EditingSupport {
		private TextCellEditor cellEditor;
		
		public SurNameEditing( TableViewer viewer ) {
			super(viewer);
			cellEditor = new TextCellEditor(viewer.getTable());
		}
		
		protected boolean canEdit(Object element) {
			return true;
		}
		
		protected CellEditor getCellEditor(Object element) {
			return cellEditor;
		}

		protected Object getValue(Object element) {
			return ((Person) element).surname;
		}

		protected void setValue(Object element, Object value) {
			((Person) element).surname = value.toString();
			getViewer().update(element, null);
		}
	}
	
	private class EmailLabelProvider extends ColumnLabelProvider {
		public String getText(Object element) {
			return ((Person) element).email;
		}
	}
	
	private class EmailEditing extends EditingSupport {
		private TextCellEditor cellEditor;
		
		public EmailEditing( TableViewer viewer ) {
			super(viewer);
			cellEditor = new TextCellEditor(viewer.getTable());
		}
		
		protected boolean canEdit(Object element) {
			return true;
		}
		
		protected CellEditor getCellEditor(Object element) {
			return cellEditor;
		}

		protected Object getValue(Object element) {
			return ((Person) element).email;
		}

		protected void setValue(Object element, Object value) {
			((Person) element).email = value.toString();
			getViewer().update(element, null);
		}
	}
	
	private int activeColumn = -1;
	
	private TableViewerColumn column;
	
	public Snippet019TableViewerAddRemoveColumnsWithEditingNewAPI(Shell shell) {
		final TableViewer v = new TableViewer(shell, SWT.BORDER
				| SWT.FULL_SELECTION);

		TableViewerColumn column = new TableViewerColumn(v,SWT.NONE);
		column.setLabelProvider(new GivenNameLabelProvider());
		column.setEditingSupport(new GivenNameEditing(v));
		
		column.getColumn().setWidth(200);
		column.getColumn().setText("Givenname");

		column = new TableViewerColumn(v,SWT.NONE);
		column.setLabelProvider(new SurNameLabelProvider());
		column.setEditingSupport(new SurNameEditing(v));
		column.getColumn().setWidth(200);
		column.getColumn().setText("Surname");

		Person[] model = createModel();

		v.setContentProvider(new MyContentProvider());
		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 removeEmailColumn(TableViewer v) {
		column.getColumn().dispose();
		v.refresh();
	}

	private void addEmailColumn(TableViewer v, int columnIndex) {
		column = new TableViewerColumn(v, SWT.NONE, columnIndex);
		column.setLabelProvider(new EmailLabelProvider());
		column.setEditingSupport(new EmailEditing(v));
		column.getColumn().setText("E-Mail");

		v.refresh();

		column.getColumn().setWidth(200);

	}

	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 Person[] createModel() {
		Person[] persons = new Person[3];
		persons[0] = new Person("Tom", "Schindl", "[e-mail]");
		persons[1] = new Person("Boris", "Bokowski",
				"[e-mail]");
		persons[2] = new Person("Tod", "Creasey", "[e-mail]");

		return persons;
	}

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

		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		new Snippet019TableViewerAddRemoveColumnsWithEditingNewAPI(shell);
		shell.open();

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

		display.dispose();

	}

}