Demonstrates ViewForm : View Form « SWT JFace Eclipse « Java

1. Java
2. SWT JFace Eclipse
3. View Form

Demonstrates ViewForm

//Send questions, comments, bug reports, etc. to the authors:

//Rob Warner (rwarner@interspatial.com)
//Robert Harris (rbrt_harris@yahoo.com)

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * This class demonstrates ViewForm
 */
public class Look {
  // Images used in the ViewForm
  private Image lookImage;
  private Image menuImage;

  // Counter for titles of ViewForms
  private int count = 0;

  /**
   * Runs the application
   */
  public void run() {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Look");

    // Load the images
    lookImage = new Image(display, this.getClass().getResourceAsStream(
        "java2s.gif"));
    menuImage = new Image(display, this.getClass().getResourceAsStream(
        "java2s.gif"));

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

    // We created the images, so we must dispose
    if (lookImage != null) lookImage.dispose();
    if (menuImage != null) menuImage.dispose();
    display.dispose();
  }

  /**
   * Creates the main window's contents
   * 
   * @param parent the main window
   */
  public void createContents(Composite parent) {
    parent.setLayout(new GridLayout(1, false));

    // Pressing the "New Document" button will create a new ViewForm
    Button button = new Button(parent, SWT.PUSH);
    button.setText("New Document");

    // Create the composite that holds the ViewForms
    final Composite composite = new Composite(parent, SWT.NONE);
    composite.setLayoutData(new GridData(GridData.FILL_BOTH));
    composite.setLayout(new FillLayout());

    // Add the event handler to create the ViewForms
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        createViewFormHelper(composite, "Document " + (++count));
        composite.layout();
      }
    });
  }

  /**
   * Helper function for creating the ViewForms
   * 
   * @param parent the parent Composite
   * @param text the title text
   */
  private void createViewFormHelper(final Composite parent, String text) {
    // Create the ViewForm
    final ViewForm vf = new ViewForm(parent, SWT.BORDER);

    // Create the CLabel for the top left, which will have an image and text
    CLabel label = new CLabel(vf, SWT.NONE);
    label.setText(text);
    label.setImage(lookImage);
    label.setAlignment(SWT.LEFT);
    vf.setTopLeft(label);

    // Create the downward-pointing arrow to display the menu
    // and set it as the top center
    final ToolBar tbMenu = new ToolBar(vf, SWT.FLAT);
    final ToolItem itemMenu = new ToolItem(tbMenu, SWT.PUSH);
    itemMenu.setImage(menuImage);
    vf.setTopCenter(tbMenu);

    // Create the close button and set it as the top right
    ToolBar tbClose = new ToolBar(vf, SWT.FLAT);
    ToolItem itemClose = new ToolItem(tbClose, SWT.PUSH);
    itemClose.setText("X");
    itemClose.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        vf.dispose();
        parent.layout();
      }
    });
    vf.setTopRight(tbClose);

    // Create the content--a multi-line text box
    final Text textArea = new Text(vf, SWT.MULTI | SWT.WRAP | SWT.V_SCROLL);
    vf.setContent(textArea);

    /* Create the menu to display when the down arrow is pressed */
    
    
    final Menu menu = new Menu(tbMenu);
    MenuItem clear = new MenuItem(menu, SWT.NONE);
    clear.setText("Clear");
    clear.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        textArea.setText("");
      }
    });

    // Add the handler to display the menu
    itemMenu.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        // Place the menu right below the toolbar button
        Rectangle rect = itemMenu.getBounds();
        menu.setLocation(tbMenu.toDisplay(rect.x, rect.y + rect.height));
        menu.setVisible(true);
      }
    });
  }

  /**
   * The application entry point
   * 
   * @param args the command line arguments
   */
  public static void main(String[] args) {
    new Look().run();
  }
}

           
       

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1.

ViewForm Example