tablecursor.java

SWT的Table 实现鼠标点击时只选择其中的一格

/*******************************************************************************  * 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.swt.SWT; import org.eclipse.swt.custom.ControlEditor; import org.eclipse.swt.custom.TableCursor; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; 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; /**  * A simple TableViewer to demonstrate usage  *  * @author Tom Schindl <[e-mail]>  *  */ public class Snippet001TableViewer {            public static void main(String[] args) {                          Display display = new Display();                          Shell shell = new Shell(display);                          shell.setLayout(new GridLayout());                                            // create a a table with 3 columns and fill with data                          final Table table = new Table(shell, SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION);                          table.setLayoutData(new GridData(GridData.FILL_BOTH));                          TableColumn column1 = new TableColumn(table, SWT.NONE);                          TableColumn column2 = new TableColumn(table, SWT.NONE);                          TableColumn column3 = new TableColumn(table, SWT.NONE);                          for (int i = 0; i < 100; i++) {                                  TableItem item = new TableItem(table, SWT.NONE);                                  item.setText(new String[] { "cell "+i+" 0", "cell "+i+" 1", "cell "+i+" 2"});                          }                          column1.pack();                          column2.pack();                          column3.pack();                                            // create a TableCursor to navigate around the table                          final TableCursor cursor = new TableCursor(table, SWT.NONE);                          // create an editor to edit the cell when the user hits "ENTER"                          // while over a cell in the table                          final ControlEditor editor = new ControlEditor(cursor);                          editor.grabHorizontal = true;                          editor.grabVertical = true;                                            cursor.addSelectionListener(new SelectionAdapter() {                                  // when the TableEditor is over a cell, select the corresponding row in                                  // the table                                  public void widgetSelected(SelectionEvent e) {                                          table.setSelection(new TableItem[] {cursor.getRow()});                                  }                                  // when the user hits "ENTER" in the TableCursor, pop up a text editor so that                                  // they can change the text of the cell                                  public void widgetDefaultSelected(SelectionEvent e){                                          final Text text = new Text(cursor, SWT.NONE);                                          TableItem row = cursor.getRow();                                          int column = cursor.getColumn();                                          text.setText(row.getText(column));                                          text.addKeyListener(new KeyAdapter() {                                                  public void keyPressed(KeyEvent e) {                                                          // close the text editor and copy the data over                                                          // when the user hits "ENTER"                                                          if (e.character == SWT.CR) {                                                                  TableItem row = cursor.getRow();                                                                  int column = cursor.getColumn();                                                                  row.setText(column, text.getText());                                                                  text.dispose();                                                          }                                                          // close the text editor when the user hits "ESC"                                                          if (e.character == SWT.ESC) {                                                                  text.dispose();                                                          }                                                  }                                          });                                          editor.setEditor(text);                                          text.setFocus();                                  }                          });                          // Hide the TableCursor when the user hits the "MOD1" or "MOD2" key.                          // This alows the user to select multiple items in the table.                          cursor.addKeyListener(new KeyAdapter() {                                  public void keyPressed(KeyEvent e) {                                          if (e.keyCode == SWT.MOD1 ||                                              e.keyCode == SWT.MOD2 ||                                              (e.stateMask & SWT.MOD1) != 0 ||                                              (e.stateMask & SWT.MOD2) != 0) {                                                  cursor.setVisible(false);                                          }                                  }                          });                          // Show the TableCursor when the user releases the "MOD2" or "MOD1" key.                          // This signals the end of the multiple selection task.                          table.addKeyListener(new KeyAdapter() {                                  public void keyReleased(KeyEvent e) {                                          if (e.keyCode == SWT.MOD1 && (e.stateMask & SWT.MOD2) != 0) return;                                          if (e.keyCode == SWT.MOD2 && (e.stateMask & SWT.MOD1) != 0) return;                                          if (e.keyCode != SWT.MOD1 && (e.stateMask & SWT.MOD1) != 0) return;                                          if (e.keyCode != SWT.MOD2 && (e.stateMask & SWT.MOD2) != 0) return;                                                                            TableItem[] selection = table.getSelection();                                          TableItem row = (selection.length == 0) ? table.getItem(table.getTopIndex()) : selection[0];                                          table.showItem(row);                                          cursor.setSelection(row, 0);                                          cursor.setVisible(true);                                          cursor.setFocus();                                  }                          });                                            shell.open();                          while (!shell.isDisposed()) {                                  if (!display.readAndDispatch())                                          display.sleep();                          }                          display.dispose();                  } }