Source Code : Update a status line when an item is armed

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Update a status line when an item is armed

/*
 * 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();
  }

}

           
       

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