Snippet152.java Source code

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Here is the source code for Snippet152.java

Source

/*
 * Control example snippet: update a status line when an item is armed
 *
 * For a list of all SWT example snippets see
 * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets
 */

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;

public class Snippet152 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        FormLayout layout = new FormLayout();
        shell.setLayout(layout);
        final Label label = new Label(shell, SWT.BORDER);
        Listener armListener = new Listener() {
            public void handleEvent(Event event) {
                MenuItem item = (MenuItem) event.widget;
                label.setText(item.getText());
                label.update();
            }
        };
        Listener showListener = new Listener() {
            public void handleEvent(Event event) {
                Menu menu = (Menu) event.widget;
                MenuItem item = menu.getParentItem();
                if (item != null) {
                    label.setText(item.getText());
                    label.update();
                }
            }
        };
        Listener hideListener = new Listener() {
            public void handleEvent(Event event) {
                label.setText("");
                label.update();
            }
        };
        FormData labelData = new FormData();
        labelData.left = new FormAttachment(0);
        labelData.right = new FormAttachment(100);
        labelData.bottom = new FormAttachment(100);
        label.setLayoutData(labelData);
        Menu menuBar = new Menu(shell, SWT.BAR);
        shell.setMenuBar(menuBar);
        MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
        fileItem.setText("File");
        fileItem.addListener(SWT.Arm, armListener);
        MenuItem editItem = new MenuItem(menuBar, SWT.CASCADE);
        editItem.setText("Edit");
        editItem.addListener(SWT.Arm, armListener);
        Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
        fileMenu.addListener(SWT.Hide, hideListener);
        fileMenu.addListener(SWT.Show, showListener);
        fileItem.setMenu(fileMenu);
        String[] fileStrings = { "New", "Close", "Exit" };
        for (int i = 0; i < fileStrings.length; i++) {
            MenuItem item = new MenuItem(fileMenu, SWT.PUSH);
            item.setText(fileStrings[i]);
            item.addListener(SWT.Arm, armListener);
        }
        Menu editMenu = new Menu(shell, SWT.DROP_DOWN);
        editMenu.addListener(SWT.Hide, hideListener);
        editMenu.addListener(SWT.Show, showListener);
        String[] editStrings = { "Cut", "Copy", "Paste" };
        editItem.setMenu(editMenu);
        for (int i = 0; i < editStrings.length; i++) {
            MenuItem item = new MenuItem(editMenu, SWT.PUSH);
            item.setText(editStrings[i]);
            item.addListener(SWT.Arm, armListener);
        }
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }

}