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/*******************************************************************************
* Copyright (c) 2000, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Lars Vogel <Lars.Vogel@vogella.com> - Bug 507185, 508155
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* TableCursor example snippet: navigate a Table's cells with the arrow keys.
* Edit when user hits Return key. Exit edit mode by hitting Escape (cancels edit)
* or Return (applies edit to table).
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import static org.eclipse.swt.events.FocusListener.*;
import static org.eclipse.swt.events.KeyListener.*;
import org.eclipse.swt.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet96 {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Snippet 96");
shell.setLayout(new GridLayout());
// create 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
@Override
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
@Override
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(keyPressedAdapter(event -> {
// close the text editor and copy the data over
// when the user hits "ENTER"
if (event.character == SWT.CR) {
TableItem localRow = cursor.getRow();
int localColumn = cursor.getColumn();
localRow.setText(localColumn, text.getText());
text.dispose();
}
// close the text editor when the user hits "ESC"
if (event.character == SWT.ESC) {
text.dispose();
}
}));
// close the text editor when the user tabs away
text.addFocusListener(focusLostAdapter(event-> text.dispose()));
editor.setEditor(text);
text.setFocus();
}
});
// Hide the TableCursor when the user hits the "CTRL" or "SHIFT" key.
// This allows the user to select multiple items in the table.
cursor.addKeyListener(keyPressedAdapter(e-> {
if (e.keyCode == SWT.CTRL
|| e.keyCode == SWT.SHIFT
|| (e.stateMask & SWT.CONTROL) != 0
|| (e.stateMask & SWT.SHIFT) != 0) {
cursor.setVisible(false);
}
}));
// When the user double clicks in the TableCursor, pop up a text editor so that
// they can change the text of the cell.
cursor.addMouseListener(MouseListener.mouseDownAdapter(e -> {
final Text text = new Text(cursor, SWT.NONE);
TableItem row = cursor.getRow();
int column = cursor.getColumn();
text.setText(row.getText(column));
text.addKeyListener(keyPressedAdapter(event -> {
// close the text editor and copy the data over
// when the user hits "ENTER"
if (event.character == SWT.CR) {
TableItem localRow = cursor.getRow();
int localColumn = cursor.getColumn();
localRow.setText(localColumn, text.getText());
text.dispose();
}
// close the text editor when the user hits "ESC"
if (event.character == SWT.ESC) {
text.dispose();
}
}));
// close the text editor when the user clicks away
text.addFocusListener(focusLostAdapter(event -> text.dispose()));
editor.setEditor(text);
text.setFocus();
}));
// Show the TableCursor when the user releases the "SHIFT" or "CTRL" key.
// This signals the end of the multiple selection task.
table.addKeyListener(keyReleasedAdapter(e-> {
if (e.keyCode == SWT.CONTROL && (e.stateMask & SWT.SHIFT) != 0) return;
if (e.keyCode == SWT.SHIFT && (e.stateMask & SWT.CONTROL) != 0) return;
if (e.keyCode != SWT.CONTROL && (e.stateMask & SWT.CONTROL) != 0) return;
if (e.keyCode != SWT.SHIFT && (e.stateMask & SWT.SHIFT) != 0) return;
TableItem[] selection = table.getSelection();
TableItem row = (selection.length == 0) ? table.getItem(table.getTopIndex()) : selection[0];
table.showItem(row);
cursor.setSelection(row, cursor.getColumn());
cursor.setVisible(true);
cursor.setFocus();
}));
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
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