org.eclipse.swt.snippets.Snippet320.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet320.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 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
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Text example snippet: implement content assist
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet320 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 320");
        shell.setLayout(new GridLayout());
        final Text text = new Text(shell, SWT.SINGLE | SWT.BORDER);
        text.setLayoutData(new GridData(150, SWT.DEFAULT));
        shell.pack();
        shell.open();

        final Shell popupShell = new Shell(display, SWT.ON_TOP);
        popupShell.setLayout(new FillLayout());
        final Table table = new Table(popupShell, SWT.SINGLE);
        for (int i = 0; i < 5; i++) {
            new TableItem(table, SWT.NONE);
        }

        text.addListener(SWT.KeyDown, event -> {
            switch (event.keyCode) {
            case SWT.ARROW_DOWN:
                int index = (table.getSelectionIndex() + 1) % table.getItemCount();
                table.setSelection(index);
                event.doit = false;
                break;
            case SWT.ARROW_UP:
                index = table.getSelectionIndex() - 1;
                if (index < 0)
                    index = table.getItemCount() - 1;
                table.setSelection(index);
                event.doit = false;
                break;
            case SWT.CR:
                if (popupShell.isVisible() && table.getSelectionIndex() != -1) {
                    text.setText(table.getSelection()[0].getText());
                    popupShell.setVisible(false);
                }
                break;
            case SWT.ESC:
                popupShell.setVisible(false);
                break;
            }
        });
        text.addListener(SWT.Modify, event -> {
            String string = text.getText();
            if (string.length() == 0) {
                popupShell.setVisible(false);
            } else {
                TableItem[] items = table.getItems();
                for (int i = 0; i < items.length; i++) {
                    items[i].setText(string + '-' + i);
                }
                Rectangle textBounds = display.map(shell, null, text.getBounds());
                popupShell.setBounds(textBounds.x, textBounds.y + textBounds.height, textBounds.width, 150);
                popupShell.setVisible(true);
            }
        });

        table.addListener(SWT.DefaultSelection, event -> {
            text.setText(table.getSelection()[0].getText());
            popupShell.setVisible(false);
        });
        table.addListener(SWT.KeyDown, event -> {
            if (event.keyCode == SWT.ESC) {
                popupShell.setVisible(false);
            }
        });

        Listener focusOutListener = event -> display.asyncExec(() -> {
            if (display.isDisposed())
                return;
            Control control = display.getFocusControl();
            if (control == null || (control != text && control != table)) {
                popupShell.setVisible(false);
            }
        });
        table.addListener(SWT.FocusOut, focusOutListener);
        text.addListener(SWT.FocusOut, focusOutListener);

        shell.addListener(SWT.Move, event -> popupShell.setVisible(false));

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

}