Java Code Examples for org.eclipse.swt.widgets.Canvas#setLayoutData()

protected void createTopPreviewArea( Composite parent )
{
	Composite cmpPreview = new Composite( parent, SWT.NONE );
	cmpPreview.setLayout( new GridLayout( ) );

	GridData gridData = new GridData( GridData.FILL_BOTH );
	gridData.horizontalSpan = 2;
	gridData.heightHint = 270;
	cmpPreview.setLayoutData( gridData );

	Label label = new Label( cmpPreview, SWT.NONE );
	{
		label.setText( getChartPreviewTitle( ) );
	}

	previewCanvas = new Canvas( cmpPreview, SWT.BORDER );
	previewCanvas.setLayoutData( new GridData( GridData.FILL_BOTH ) );
	previewCanvas.setBackground( Display.getDefault( )
			.getSystemColor( SWT.COLOR_WIDGET_BACKGROUND ) );

	previewPainter = createPreviewPainter( );
}
 

private void createAnnotationInformation(Composite parent, final Annotation annotation) {
    Composite composite= new Composite(parent, SWT.NONE);
    composite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
    GridLayout layout= new GridLayout(2, false);
    layout.marginHeight= 2;
    layout.marginWidth= 2;
    layout.horizontalSpacing= 0;
    composite.setLayout(layout);

    final Canvas canvas= new Canvas(composite, SWT.NO_FOCUS);
    GridData gridData= new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false);
    gridData.widthHint= 17;
    gridData.heightHint= 16;
    canvas.setLayoutData(gridData);
    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            e.gc.setFont(null);
            fMarkerAnnotationAccess.paint(annotation, e.gc, canvas, new Rectangle(0, 0, 16, 16));
        }
    });

    StyledText text= new StyledText(composite, SWT.MULTI | SWT.WRAP | SWT.READ_ONLY);
    GridData data= new GridData(SWT.FILL, SWT.FILL, true, true);
    text.setLayoutData(data);
    text.setText(annotation.getText());
}
 

private void createPreviewArea( Composite parent )
{
	Composite cmpPreview = ChartUIUtil.createCompositeWrapper( parent );
	{
		GridData gridData = new GridData( GridData.FILL_BOTH );
		gridData.widthHint = CENTER_WIDTH_HINT;
		gridData.heightHint = 200;
		cmpPreview.setLayoutData( gridData );
	}

	Label label = new Label( cmpPreview, SWT.NONE );
	{
		label.setFont( JFaceResources.getBannerFont( ) );
		label.setText( Messages.getString( "TaskSelectData.Label.ChartPreview" ) ); //$NON-NLS-1$
	}

	previewCanvas = new Canvas( cmpPreview, SWT.BORDER );
	{
		GridData gd = new GridData( GridData.FILL_BOTH );
		previewCanvas.setLayoutData( gd );
		previewCanvas.setBackground( Display.getDefault( )
				.getSystemColor( SWT.COLOR_WIDGET_BACKGROUND ) );
	}
}
 

/**
 * main() method for constructing the layout.
 * 
 * @param args
 */
public static void main( String[] args )
{
	Display display = Display.getDefault( );
	Shell shell = new Shell( display );
	shell.setSize( 600, 400 );
	shell.setLayout( new GridLayout( ) );

	Canvas cCenter = new Canvas( shell, SWT.NONE );
	StyleChartViewer cv = new StyleChartViewer(  );
	cCenter.setLayoutData( new GridData( GridData.FILL_BOTH ) );
	cCenter.addPaintListener( cv );

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

/**
 * main() method for constructing the layout.
 * 
 * @param args
 */
public static void main( String[] args )
{
	Display display = Display.getDefault( );
	Shell shell = new Shell( display );
	shell.setSize( 600, 400 );
	shell.setLayout( new GridLayout( ) );

	Canvas cCenter = new Canvas( shell, SWT.NONE );
	AutoDataBindingViewer adbv = new AutoDataBindingViewer(  );
	cCenter.setLayoutData( new GridData( GridData.FILL_BOTH ) );
	cCenter.addPaintListener( adbv );

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

@Test
public void testAll() throws Exception {
	shell = new Shell();

	shell.open();
	shell.setLayout(new GridLayout(1, false));
	final Canvas canvas = new Canvas(shell, SWT.None);
	canvas.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	text = new Text(shell, SWT.READ_ONLY);
	text.setFont(XYGraphMediaFactory.getInstance().getFont("default", 18,
			SWT.BOLD));
	text.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
	final LightweightSystem lws = new LightweightSystem(canvas);
	lws.setContents(getTestBench());
	shell.setSize(800, 500);
	testGetBeanInfo();
	testWidget();
}
 

protected void adjustItemNumber() {
	if (fComposite == null)
		return;

	Control[] children= fComposite.getChildren();
	int oldSize= children.length;
	int newSize= fInput == null ? 0 : fInput.fAnnotations.length;

	Display display= fShell.getDisplay();

	// add missing items
	for (int i= oldSize; i < newSize; i++) {
		Canvas canvas= new Canvas(fComposite, SWT.NONE);
		Object gridData= fLayouter.getLayoutData();
		canvas.setLayoutData(gridData);
		canvas.setBackground(display.getSystemColor(SWT.COLOR_INFO_BACKGROUND));

		canvas.addPaintListener(fPaintListener);

		canvas.addMouseTrackListener(fMouseTrackListener);

		canvas.addMouseListener(fMouseListener);

		canvas.addListener(SWT.MenuDetect, fMenuDetectListener);

		canvas.addDisposeListener(fDisposeListener);
	}

	// dispose of exceeding resources
	for (int i= oldSize; i > newSize; i--) {
		Item item= (Item) children[i - 1].getData();
		item.deselect();
		children[i - 1].dispose();
	}

}
 

@Override
protected Control createContents(Composite parent) {
	Composite composite = createForm(parent);
	createScale(composite);
	Canvas canvas = new Canvas(composite, SWT.BORDER);
	canvas.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	LightweightSystem lws = new LightweightSystem(canvas);
	ScrollableThumbnail thumbnail = createThumbnail();
	lws.setContents(thumbnail);
	viewer.getControl().addDisposeListener((e) -> {
		if (!closed)
			close();
	});
	return super.createContents(parent);
}
 

private void createAnnotationInformation(Composite parent, final Annotation annotation) {
	Composite composite= new Composite(parent, SWT.NONE);
	composite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
	GridLayout layout= new GridLayout(2, false);
	layout.marginHeight= 2;
	layout.marginWidth= 2;
	layout.horizontalSpacing= 0;
	composite.setLayout(layout);

	final Canvas canvas= new Canvas(composite, SWT.NO_FOCUS);
	GridData gridData= new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false);
	gridData.widthHint= 17;
	gridData.heightHint= 16;
	canvas.setLayoutData(gridData);
	canvas.addPaintListener(new PaintListener() {
		@Override
		public void paintControl(PaintEvent e) {
			e.gc.setFont(null);
			fMarkerAnnotationAccess.paint(annotation, e.gc, canvas, new Rectangle(0, 0, 16, 16));
		}
	});

	StyledText text= new StyledText(composite, SWT.MULTI | SWT.WRAP | SWT.READ_ONLY);
	GridData data= new GridData(SWT.FILL, SWT.FILL, true, true);
	text.setLayoutData(data);
	String annotationText= annotation.getText();
	if (annotationText != null)
		text.setText(annotationText);
}
 

protected Composite createTitleArea( Composite parent )
{
	Composite cmpTitle = super.createTitleArea( parent );
	// ( (GridData) cmpTitle.getLayoutData( ) ).heightHint = 250;

	previewCanvas = new Canvas( cmpTitle, SWT.BORDER );
	{
		GridData gd = new GridData( GridData.FILL_BOTH );
		gd.horizontalSpan = 2;
		previewCanvas.setLayoutData( gd );
		previewCanvas.setBackground( Display.getDefault( )
				.getSystemColor( SWT.COLOR_WIDGET_BACKGROUND ) );
	}
	return cmpTitle;
}
 

protected void createPopupControl() {
	// overall panel
	final Shell top = getPopup();
	final GridLayout layout = new GridLayout(3, true);
	layout.horizontalSpacing = 0;
	layout.verticalSpacing = 0;
	layout.marginWidth = 5;
	layout.marginHeight = 5;
	top.setLayout(layout);
	top.setBackground(IGamaColors.BLACK.color());
	if (createExtraInfo) {
		// left overlay info
		left = label(top, SWT.LEFT);
		// center overlay info
		center = label(top, SWT.CENTER);
		// right overlay info
		right = label(top, SWT.RIGHT);
	}
	// coordinates overlay info
	coord = label(top, SWT.LEFT);
	// zoom overlay info
	zoom = label(top, SWT.CENTER);
	// scalebar overlay info
	scalebar = new Canvas(top, SWT.None);
	scalebar.setVisible(true);
	final GridData scaleData = new GridData(SWT.RIGHT, SWT.CENTER, true, false);
	scaleData.minimumWidth = 140;
	scaleData.widthHint = 140;
	scaleData.minimumHeight = 24;
	scaleData.heightHint = 24;
	scalebar.setLayoutData(scaleData);
	scalebar.setBackground(IGamaColors.BLACK.color());
	scalebar.addPaintListener(e -> paintScale(e.gc));
	top.addMouseListener(toggleListener);
	scalebar.addMouseListener(toggleListener);
	top.layout();
}
 

private void createAnnotationInformation(Composite parent, final Annotation annotation) {
	Composite composite = new Composite(parent, SWT.NONE);
	composite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
	GridLayout layout = new GridLayout(2, false);
	layout.marginHeight = 2;
	layout.marginWidth = 2;
	layout.horizontalSpacing = 0;
	composite.setLayout(layout);

	final Canvas canvas = new Canvas(composite, SWT.NO_FOCUS);
	GridData gridData = new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false);
	gridData.widthHint = 17;
	gridData.heightHint = 16;
	canvas.setLayoutData(gridData);
	canvas.addPaintListener(new PaintListener() {

		@Override
		public void paintControl(PaintEvent e) {
			e.gc.setFont(null);
			fMarkerAnnotationAccess.paint(annotation, e.gc, canvas, new Rectangle(0, 0, 16, 16));
		}
	});

	StyledText text = new StyledText(composite, SWT.MULTI | SWT.WRAP | SWT.READ_ONLY);
	GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
	text.setLayoutData(data);
	String annotationText = annotation.getText();
	if (annotationText != null)
		text.setText(annotationText);
}
 

private void createAnnotationInformation(Composite parent, final Annotation annotation) {
	Composite composite= new Composite(parent, SWT.NONE);
	composite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
	GridLayout layout= new GridLayout(2, false);
	layout.marginHeight= 2;
	layout.marginWidth= 2;
	layout.horizontalSpacing= 0;
	composite.setLayout(layout);

	final Canvas canvas= new Canvas(composite, SWT.NO_FOCUS);
	GridData gridData= new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false);
	gridData.widthHint= 17;
	gridData.heightHint= 16;
	canvas.setLayoutData(gridData);
	canvas.addPaintListener(new PaintListener() {
		@Override
		public void paintControl(PaintEvent e) {
			e.gc.setFont(null);
			fMarkerAnnotationAccess.paint(annotation, e.gc, canvas, new Rectangle(0, 0, 16, 16));
		}
	});

	StyledText text= new StyledText(composite, SWT.MULTI | SWT.WRAP | SWT.READ_ONLY);
	GridData data= new GridData(SWT.FILL, SWT.FILL, true, true);
	text.setLayoutData(data);
	String annotationText= annotation.getText();
	if (annotationText != null)
		text.setText(annotationText);
}
 

/**
 * Creates the bar that displays the memory
 */
private void createBar() {
	bar = new Canvas(this, SWT.NONE);
	final GridData gd = new GridData(GridData.FILL, GridData.FILL, true, false);
	gd.minimumWidth = 100;
	gd.heightHint = 30;
	bar.setLayoutData(gd);
	heapMaxSize = (int) (Runtime.getRuntime().maxMemory() / (1024 * 1024));
	bar.addPaintListener(e -> {
		drawBar(e);
	});
}
 

/**
 * Build the image on top of the login box. If no image has been set, create
 * a default image
 */
private void buildImage() {
	final Canvas canvas = new Canvas(shell, SWT.DOUBLE_BUFFERED);
	final GridData gridData = new GridData(GridData.FILL, GridData.FILL, true, false, 4, 1);
	gridData.widthHint = 400;
	gridData.heightHint = 60;
	canvas.setLayoutData(gridData);
	canvas.addPaintListener(e -> {
		e.gc.drawImage(image == null ? createDefaultImage(e.width, e.height) : image, 0, 0);
	});

}
 

private void addModelTab() {
  wModelTab = new CTabItem(wTabFolder, SWT.NONE);
  wModelTab.setText(BaseMessages.getString(PKG, "StarModelDialog.ModelTab.Label"));

  Composite wModelComp = new Composite(wTabFolder, SWT.NONE);
  props.setLook(wModelComp);

  FormLayout transLayout = new FormLayout();
  transLayout.marginWidth = Const.MARGIN;
  transLayout.marginHeight = Const.MARGIN;
  wModelComp.setLayout(transLayout);

  // Model name:
  //
  Label wlModelName = new Label(wModelComp, SWT.RIGHT);
  wlModelName.setText(BaseMessages.getString(PKG, "StarModelDialog.ModelName.Label"));
  props.setLook(wlModelName);
  FormData fdlJobname = new FormData();
  fdlJobname.left = new FormAttachment(0, 0);
  fdlJobname.right = new FormAttachment(middle, -margin);
  fdlJobname.top = new FormAttachment(0, margin);
  wlModelName.setLayoutData(fdlJobname);
  wModelName = new Text(wModelComp, SWT.SINGLE | SWT.LEFT | SWT.BORDER);
  props.setLook(wModelName);
  FormData fdJobname = new FormData();
  fdJobname.left = new FormAttachment(middle, 0);
  fdJobname.top = new FormAttachment(0, margin);
  fdJobname.right = new FormAttachment(100, 0);
  wModelName.setLayoutData(fdJobname);
  Control lastControl = wModelName;

  // Model description
  //
  Label wlModelDescription = new Label(wModelComp, SWT.RIGHT);
  wlModelDescription.setText(BaseMessages.getString(PKG, "StarModelDialog.ModelDescription.Label"));
  props.setLook(wlModelDescription);
  FormData fdlJobFilename = new FormData();
  fdlJobFilename.left = new FormAttachment(0, 0);
  fdlJobFilename.right = new FormAttachment(middle, -margin);
  fdlJobFilename.top = new FormAttachment(lastControl, margin);
  wlModelDescription.setLayoutData(fdlJobFilename);
  wModelDescription = new Text(wModelComp, SWT.SINGLE | SWT.LEFT | SWT.BORDER);
  props.setLook(wModelDescription);
  FormData fdJobFilename = new FormData();
  fdJobFilename.left = new FormAttachment(middle, 0);
  fdJobFilename.top = new FormAttachment(lastControl, margin);
  fdJobFilename.right = new FormAttachment(100, 0);
  wModelDescription.setLayoutData(fdJobFilename);
  lastControl = wModelDescription;

  canvas = new Canvas(wModelComp, SWT.BORDER);
  FormData fdCanvas = new FormData();
  fdCanvas.left = new FormAttachment(0,0);
  fdCanvas.right = new FormAttachment(100, 0);
  fdCanvas.top = new FormAttachment(lastControl, 3*margin);
  fdCanvas.bottom = new FormAttachment(100, -margin);
  canvas.setLayoutData(fdCanvas);
  canvas.addPaintListener(new PaintListener() {
    @Override
    public void paintControl(PaintEvent paintEvent) {
      drawLogicalModel(logicalModel, canvas, paintEvent);
    }
  });


  FormData fdModelComp = new FormData();
  fdModelComp.left = new FormAttachment(0, 0);
  fdModelComp.top = new FormAttachment(0, 0);
  fdModelComp.right = new FormAttachment(100, 0);
  fdModelComp.bottom = new FormAttachment(100, 0);

  wModelComp.setLayoutData(fdModelComp);
  wModelTab.setControl(wModelComp);
}
 

private Composite createWidget(final Composite parent) {

        fFont = adjustFont(parent);

        // --------------------------------------------------------------------
        // Define the histogram
        // --------------------------------------------------------------------

        final Composite composite = new Composite(parent, SWT.FILL);
        composite.setLayout(GridLayoutFactory.fillDefaults().numColumns(2).create());

        // Use all the horizontal space
        composite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());

        // Y-axis max event
        fMaxNbEventsLabel = new Label(composite, SWT.RIGHT);
        fMaxNbEventsLabel.setFont(fFont);
        fMaxNbEventsLabel.setText("0"); //$NON-NLS-1$
        fMaxNbEventsLabel.setLayoutData(GridDataFactory.fillDefaults().align(SWT.RIGHT, SWT.TOP).create());

        // Histogram itself
        Composite canvasComposite = new Composite(composite, SWT.BORDER);
        canvasComposite.setLayout(GridLayoutFactory.fillDefaults().spacing(0, 0).create());
        canvasComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).span(1, 1).create());
        fCanvas = new Canvas(canvasComposite, SWT.DOUBLE_BUFFERED);
        fCanvas.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).create());
        fCanvas.addDisposeListener(e -> {
            Object image = fCanvas.getData(IMAGE_KEY);
            if (image instanceof Image) {
                ((Image) image).dispose();
            }
        });

        fTimeLineScale = new TimeGraphScale(canvasComposite, fColorScheme, SWT.BOTTOM);
        fTimeLineScale.setLayoutData(GridDataFactory.fillDefaults().grab(true, false).create());
        fTimeLineScale.setHeight(TIME_SCALE_HEIGHT);
        fTimeLineScale.setTimeProvider(new HistogramTimeAdapter(fDataModel));

        updateTimeFormat();

        return composite;
    }
 

private void addGraphTab() {

    CTabItem wGraphTab = new CTabItem( wTabs, SWT.NONE );
    wGraphTab.setText( "Graph" );

    ScrolledComposite wGraphSComp = new ScrolledComposite( wTabs, SWT.V_SCROLL | SWT.H_SCROLL );
    wGraphSComp.setLayout( new FillLayout() );

    Composite wGraphComp = new Composite( wGraphSComp, SWT.NONE );
    props.setLook( wGraphComp );

    FormLayout formLayout = new FormLayout();
    formLayout.marginWidth = 3;
    formLayout.marginHeight = 3;
    wGraphComp.setLayout( formLayout );

    Button wAuto = new Button( wGraphComp, SWT.PUSH );
    wAuto.setText( "Auto" );
    FormData fdAuto = new FormData();
    fdAuto.right = new FormAttachment( 100, 0 );
    fdAuto.bottom = new FormAttachment( 100, 0 );
    wAuto.setLayoutData( fdAuto );
    wAuto.addListener( SWT.Selection, this::autoModelLayout );

    // This is the canvas on which we draw the graph
    //
    wCanvas = new Canvas( wGraphComp, SWT.NONE );
    props.setLook( wCanvas );
    FormData fdCanvas = new FormData();
    fdCanvas.left = new FormAttachment( 0, 0 );
    fdCanvas.right = new FormAttachment( 100, 0 );
    fdCanvas.top = new FormAttachment( 0, 0 );
    fdCanvas.bottom = new FormAttachment( 100, 0 );
    wCanvas.setLayoutData( fdCanvas );
    wCanvas.addPaintListener( this::paintCanvas );
    wCanvas.addListener( SWT.MouseDown, this::graphMouseDown );
    wCanvas.addListener( SWT.MouseUp, this::graphMouseUp );
    wCanvas.addListener( SWT.MouseMove, this::moveGraphObject );
    wCanvas.addListener( SWT.MouseDoubleClick, this::editGraphObject );

    FormData fdGraphComp = new FormData();
    fdGraphComp.left = new FormAttachment( 0, 0 );
    fdGraphComp.top = new FormAttachment( 0, 0 );
    fdGraphComp.right = new FormAttachment( 100, 0 );
    fdGraphComp.bottom = new FormAttachment( wAuto, -margin );
    wGraphComp.setLayoutData( fdGraphComp );

    wGraphComp.pack();

    Rectangle bounds = wGraphComp.getBounds();

    wGraphSComp.setContent( wGraphComp );
    wGraphSComp.setExpandHorizontal( true );
    wGraphSComp.setExpandVertical( true );
    wGraphSComp.setMinWidth( bounds.width );
    wGraphSComp.setMinHeight( bounds.height );

    wGraphTab.setControl( wGraphSComp );
  }
 

@Override
protected Control createContents(final Composite parent) {
	FormToolkit toolkit = new FormToolkit(Display.getCurrent());
	ScrolledForm scrolledForm = toolkit.createScrolledForm(parent);
	Composite body = scrolledForm.getBody();
	body.setLayout(new FillLayout());
	toolkit.paintBordersFor(body);

	SashForm sashForm = new SashForm(body, SWT.VERTICAL);
	toolkit.adapt(sashForm, true, true);

	Section categorySection = toolkit
			.createSection(sashForm, ExpandableComposite.NO_TITLE
					| ExpandableComposite.EXPANDED);
	categorySection.setText("");
	Composite composite = toolkit.createComposite(categorySection,
			SWT.NONE);
	composite.setLayout(new GridLayout());
	categorySection.setClient(composite);
	toolkit.paintBordersFor(composite);
	final Scale scale = new Scale(composite, SWT.NONE);
	scale.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
	final double[] values = GraphConfig.ZOOM_LEVELS;
	final int increment = 100 / (values.length - 1);
	scale.setIncrement(increment);
	scale.setMinimum(0);
	scale.setMaximum(100);
	Controls.onSelect(scale, (e) -> {
		zoomManager.setZoom(values[scale.getSelection() / increment]);
	});
	scale.setSelection(increment * (values.length - 1) / 2);
	Canvas canvas = new Canvas(composite, SWT.BORDER);
	canvas.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	lws = new LightweightSystem(canvas);
	thumbnail = new ScrollableThumbnail(port);
	thumbnail.setSource(figure);
	lws.setContents(thumbnail);
	disposeListener = new DisposeListener() {

		@Override
		public void widgetDisposed(final DisposeEvent e) {
			if (thumbnail != null) {
				thumbnail.deactivate();
				thumbnail = null;
			}
			if (control != null && !control.isDisposed())
				control.removeDisposeListener(disposeListener);
			close();
		}
	};
	control.addDisposeListener(disposeListener);
	return super.createContents(parent);
}
 

@Override
public void init() {
    final TransitionTest2 me = this;
    
    _containerComposite.setLayout(new FormLayout());
    //_containerComposite.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK));
    
    imgs = new Image[6];
    for(int i = 0; i < imgs.length; i++)
        imgs[i] = new Image(_containerComposite.getDisplay(), getClass().getResourceAsStream(new Formatter().format("%02d.jpg", i+1).toString()));
    
    final Canvas cnvs = new Canvas(_containerComposite, SWT.DOUBLE_BUFFERED);
    cnvs.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK));
    FormData fd = new FormData();
    fd.left = new FormAttachment(0, 5);
    fd.right = new FormAttachment(100, -5);
    fd.top = new FormAttachment(0, 5);
    fd.bottom = new FormAttachment(100, -35);
    cnvs.setLayoutData(fd);
    
    final Button btn = new Button(_containerComposite, SWT.PUSH);
    btn.setText("Hit me!");
    fd = new FormData();
    fd.top = new FormAttachment(cnvs, 5);
    fd.bottom = new FormAttachment(100, -5);
    fd.left = new FormAttachment(0, 5);
    fd.right = new FormAttachment(100, -5);
    btn.setLayoutData(fd);
    
    _tm = new TransitionManager(new ImageTransitionable() {
        public void setSelection(int index) {
            me.curImg = index;
        }
    
        public int getSelection() {
            return me.curImg;
        }
    
        public Control getControl(int index) {
            return cnvs;
        }
    
        public Composite getComposite() {
            return _containerComposite;
        }
    
        public double getDirection(int toIndex, int fromIndex) {
            return getSelectedDirection(toIndex, fromIndex);
        }
    
        public void addSelectionListener(SelectionListener listener) {
            final SelectionListener transitionableListener = listener;
            btn.addSelectionListener(new SelectionAdapter() {
                public void widgetSelected(SelectionEvent e) {
                    me.curImg = (me.curImg + 1) % me.imgs.length;
                    transitionableListener.widgetSelected(e);
                }
            });
        }
    });
    _tm.setControlImages(imgs);
    
    cnvs.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Image img = me.imgs[me.curImg];
            e.gc.drawImage(
                    img
                    , 0
                    , 0
                    , img.getImageData().width
                    , img.getImageData().height
                    , 0
                    , 0
                    , cnvs.getSize().x
                    , cnvs.getSize().y
                    );
        }
    });
    
}