SWT－Table按“行“进行编辑

package table;

/*
 * 通常在一个表格中的数据是一致的（同类型），所以我们通常做的table编辑工作是针对列的，
 * 如在tableviewer中使用cellEditor和cellModifyer来编辑表格。
 * 
 * 但是在某些情况下，我们需要对行进行编辑。本示例中是展示表格的单行是文本编辑，双行是下拉框编。，
 *
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CCombo;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;

public class TableEditoExamples {
	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		
		// 下拉框items
		final String[] options = { "下拉框 1", "下拉框 2", "下拉框 3" };
		
		// 创建table 和 tableItems
		final Table table = new Table(shell, SWT.FULL_SELECTION| SWT.HIDE_SELECTION);
		TableColumn column1 = new TableColumn(table, SWT.NONE);
		TableColumn column2 = new TableColumn(table, SWT.NONE);
		for (int i = 0; i < 10; i++) {
			if (i % 2 == 1) {
				TableItem item = new TableItem(table, SWT.NONE);
				item.setText(new String[] { "item " + i, "文本框编辑" });
			} else {
				TableItem item = new TableItem(table, SWT.NONE);
				item.setText(new String[] { "item " + i, "下拉框 1" });
			}
		}
		column1.pack();
		column2.pack();

		final TableEditor editor = new TableEditor(table);
		// The editor must have the same size as the cell and must
		// not be any smaller than 50 pixels.
		editor.horizontalAlignment = SWT.LEFT;
		editor.grabHorizontal = true;
		editor.minimumWidth = 50;
		// editing the second column
		final int Edit_Table_Column = 1;

		table.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				// Clean up any previous editor control
				Control oldEditor = editor.getEditor();
				if (oldEditor != null)
					oldEditor.dispose();

				// Identify the selected row
				final TableItem item = (TableItem) e.item;
				if (item == null)
					return;

				int index = table.getSelectionIndex();
				
				// 单行文本框
				if (index % 2 == 1) {
					// The control that will be the editor must be a child of
					// the
					// Table
					Text newEditor = new Text(table, SWT.NONE);
					newEditor.setText(item.getText(Edit_Table_Column));
					newEditor.addModifyListener(new ModifyListener() {
						public void modifyText(ModifyEvent me) {
							Text text = (Text) editor.getEditor();
							editor.getItem().setText(Edit_Table_Column,
									text.getText());
						}
					});
					newEditor.selectAll();
					newEditor.setFocus();
					editor.setEditor(newEditor, item, Edit_Table_Column);
				} else { //// 双行下拉框
					final CCombo combo = new CCombo(table, SWT.READ_ONLY);
					for (int i = 0, n = options.length; i < n; i++) {
						combo.add(options[i]);
					}
					// Select the previously selected item from the cell
					combo.select(combo.indexOf(item.getText(Edit_Table_Column)));

					// Compute the width for the editor
					// Also, compute the column width, so that the dropdown fits
					editor.minimumWidth = combo.computeSize(SWT.DEFAULT,
							SWT.DEFAULT).x;
					table.getColumn(Edit_Table_Column).setWidth(
							editor.minimumWidth);

					// Set the focus on the dropdown and set into the editor
					combo.setFocus();
					editor.setEditor(combo, item, Edit_Table_Column);

					// Add a listener to set the selected item back into the
					// cell
					final int col = Edit_Table_Column;
					combo.addSelectionListener(new SelectionAdapter() {
						public void widgetSelected(SelectionEvent event) {
							item.setText(col, combo.getText());

							// They selected an item; end the editing session
							combo.dispose();
						}
					});
				}

			}
		});
		shell.setSize(200, 200);
		shell.open();

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

}