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

/**
 * Show the dark panel
 */
public void show() {
	if (parent.isDisposed()) {
		SWT.error(SWT.ERROR_WIDGET_DISPOSED);
	}

	panel = new Shell(parent, SWT.APPLICATION_MODAL | SWT.NO_TRIM);
	panel.setLayout(new FillLayout());
	panel.setAlpha(alpha);

	panel.addListener(SWT.KeyUp, event -> {
		event.doit = false;
	});

	canvas = new Canvas(panel, SWT.NO_BACKGROUND | SWT.DOUBLE_BUFFERED);
	canvas.addPaintListener(event -> {
		paintCanvas(event);
	});

	panel.setBounds(panel.getDisplay().map(parent, null, parent.getClientArea()));
	panel.open();
}
 

/**
 * Show the blurred panel
 */
public void show() {
	if (parent.isDisposed()) {
		SWT.error(SWT.ERROR_WIDGET_DISPOSED);
	}

	panel = new Shell(parent, SWT.APPLICATION_MODAL | SWT.NO_TRIM);
	panel.setLayout(new FillLayout());

	panel.addListener(SWT.KeyUp, event -> {
		event.doit = false;
	});

	canvas = new Canvas(panel, SWT.NO_BACKGROUND | SWT.DOUBLE_BUFFERED);
	canvas.addPaintListener(event -> {
		paintCanvas(event);
	});

	panel.setBounds(panel.getDisplay().map(parent, null, parent.getClientArea()));
	panel.open();

}
 

/**
 * 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( );
}
 

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());
}
 

/**
 * 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( );
}
 

public GraphicalViewer(Composite parent) {
    canvas = new Canvas(parent, SWT.NONE);
    parent.addListener(SWT.Resize, new Listener() {
        public void handleEvent(Event event) {
            canvas.setBounds(canvas.getParent().getClientArea());
            requestImageRedraw();
        }
    });
    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            redrawImageIfRequested();
            GC gc = e.gc;
            paintCanvas(gc);
        }

    });
}
 

private void setUpDrawing(Composite parent) {
	paintCanvas = new Canvas(parent, SWT.BACKGROUND);
	preview = new ChartPreview();
	paintCanvas.addPaintListener(preview);
	paintCanvas.addControlListener(preview);
	preview.setPreview(paintCanvas);
	preview.setDataPresent(false);
	preview.setTextToShow(noDataToDisplay);
}
 

/**
 * @param parent
 * @param image
 * @return
 */
public Canvas createImageButton(final Composite parent, final Image image) {
    final Canvas deleteButton = new Canvas(parent, SWT.TRANSPARENT);
    deleteButton.addPaintListener(new PaintListener() {

        @Override
        public void paintControl(final PaintEvent e) {
            e.gc.drawImage(image, 0, 0, 16, 16, 0, 0, DELETE_SIZE, DELETE_SIZE);
        }
    });
    return deleteButton;
}
 

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);
}
 

/**
 * As soon as the editor is activated, flip the current data value and commit it.<br/>
 * The repaint will pick up the new value and flip the image.
 */
@Override
protected Control activateCell(Composite parent, Object originalCanonicalValue, Character initialEditValue) {
	setCanonicalValue(originalCanonicalValue);

	checked = !checked;

	canvas = new Canvas(parent, SWT.NONE);

	canvas.addPaintListener(new PaintListener() {
		public void paintControl(PaintEvent paintEvent) {
			Rectangle bounds = canvas.getBounds();
			Rectangle rect = new Rectangle(0, 0, bounds.width, bounds.height);
			checkBoxCellPainter.paintIconImage(paintEvent.gc, rect, bounds.height / 2 - checkBoxCellPainter.getPreferredHeight(checked) / 2, checked);
		}

	});

	canvas.addMouseListener(new MouseAdapter() {
		@Override
		public void mouseUp(MouseEvent e) {
			checked = !checked;
			canvas.redraw();
		}

	});

	commit(MoveDirectionEnum.NONE, false);

	return canvas;
}
 

/**
 * As soon as the editor is activated, flip the current data value and commit it.<br/>
 * The repaint will pick up the new value and flip the image.
 */
@Override
protected Control activateCell(Composite parent, Object originalCanonicalValue, Character initialEditValue) {
	setCanonicalValue(originalCanonicalValue);

	checked = !checked;

	canvas = new Canvas(parent, SWT.NONE);

	canvas.addPaintListener(new PaintListener() {
		public void paintControl(PaintEvent paintEvent) {
			Rectangle bounds = canvas.getBounds();
			Rectangle rect = new Rectangle(0, 0, bounds.width, bounds.height);
			checkBoxCellPainter.paintIconImage(paintEvent.gc, rect, bounds.height / 2 - checkBoxCellPainter.getPreferredHeight(checked) / 2, checked);
		}

	});

	canvas.addMouseListener(new MouseAdapter() {
		@Override
		public void mouseUp(MouseEvent e) {
			checked = !checked;
			canvas.redraw();
		}

	});

	commit(MoveDirectionEnum.NONE, false);

	return canvas;
}
 

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);
	String annotationText= annotation.getText();
	if (annotationText != null)
		text.setText(annotationText);
}
 

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();
	}

}
 

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);
	});

}
 

@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
                    );
        }
    });
    
}
 

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 );
  }