Example usage for org.eclipse.swt.widgets Display getClientArea

Introduction

In this page you can find the example usage for org.eclipse.swt.widgets Display getClientArea.

Prototype

public Rectangle getClientArea() 

Source Link

Usage

From source file:DisplayBounds.java

public static void main(String[] args) {
    Display display = new Display();
    System.out.println(//from  w  w  w . j a  v a 2 s .  c om
            "Display Bounds=" + display.getBounds() + " Display ClientArea=" + display.getClientArea());
    display.dispose();
}

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From source file:org.eclipse.swt.examples.paint.PaintSurface.java

/**
 * Constructs a PaintSurface.// www  . j  a va 2s  .c om
 * <p>
 * paintCanvas must have SWT.NO_REDRAW_RESIZE and SWT.NO_BACKGROUND styles,
 *     and may have SWT.V_SCROLL and/or SWT.H_SCROLL.
 * </p>
 * @param paintCanvas the Canvas object in which to render
 * @param paintStatus the PaintStatus object to use for providing user feedback
 * @param fillColor the color to fill the canvas with initially
 */
public PaintSurface(Canvas paintCanvas, Text statusText, Color fillColor) {
    this.paintCanvas = paintCanvas;
    this.statusText = statusText;
    clearStatus();

    /* Set up the drawing surface */
    Rectangle displayRect = paintCanvas.getDisplay().getClientArea();
    imageWidth = displayRect.width;
    imageHeight = displayRect.height;
    image = new Image(paintCanvas.getDisplay(), imageWidth, imageHeight);

    imageFDC.gc = new GC(image);
    imageFDC.gc.setBackground(fillColor);
    imageFDC.gc.fillRectangle(0, 0, imageWidth, imageHeight);
    displayFDC.gc = new GC(paintCanvas);

    /* Initialize the session */
    setPaintSession(null);

    /* Add our listeners */
    paintCanvas.addDisposeListener(e -> displayFDC.gc.dispose());
    paintCanvas.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseDown(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseDown(event);
        }

        @Override
        public void mouseUp(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseUp(event);
        }

        @Override
        public void mouseDoubleClick(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseDoubleClick(event);
        }
    });
    paintCanvas.addMouseMoveListener(event -> {
        processMouseEventCoordinates(event);
        if (paintSession != null)
            paintSession.mouseMove(event);
    });
    paintCanvas.addPaintListener(event -> {
        if (rubberband.isEmpty()) {
            // Nothing to merge, so we just refresh
            event.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y, event.width,
                    event.height, event.x, event.y, event.width, event.height);
        } else {
            /*
             * Avoid flicker when merging overlayed objects by constructing the image on
             * a backbuffer first, then blitting it to the screen.
             */
            // Check that the backbuffer is large enough
            if (paintImage != null) {
                Rectangle rect1 = paintImage.getBounds();
                if ((event.width + event.x > rect1.width) || (event.height + event.y > rect1.height)) {
                    paintFDC.gc.dispose();
                    paintImage.dispose();
                    paintImage = null;
                }
            }
            if (paintImage == null) {
                Display display = getDisplay();
                Rectangle rect2 = display.getClientArea();
                paintImage = new Image(display, Math.max(rect2.width, event.width + event.x),
                        Math.max(rect2.height, event.height + event.y));
                paintFDC.gc = new GC(paintImage);
            }
            // Setup clipping and the FDC
            Region clipRegion = new Region();
            event.gc.getClipping(clipRegion);
            paintFDC.gc.setClipping(clipRegion);
            clipRegion.dispose();

            paintFDC.xOffset = displayFDC.xOffset;
            paintFDC.yOffset = displayFDC.yOffset;
            paintFDC.xScale = displayFDC.xScale;
            paintFDC.yScale = displayFDC.yScale;

            // Merge the overlayed objects into the image, then blit
            paintFDC.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y,
                    event.width, event.height, event.x, event.y, event.width, event.height);
            rubberband.draw(paintFDC);
            event.gc.drawImage(paintImage, event.x, event.y, event.width, event.height, event.x, event.y,
                    event.width, event.height);
        }
    });
    paintCanvas.addControlListener(ControlListener.controlResizedAdapter(e -> handleResize()));

    /* Set up the paint canvas scroll bars */
    ScrollBar horizontal = paintCanvas.getHorizontalBar();
    horizontal.setVisible(true);
    horizontal
            .addSelectionListener(widgetSelectedAdapter(event -> scrollHorizontally((ScrollBar) event.widget)));
    ScrollBar vertical = paintCanvas.getVerticalBar();
    vertical.setVisible(true);
    vertical.addSelectionListener(widgetSelectedAdapter(event -> scrollVertically((ScrollBar) event.widget)));
    handleResize();
}

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From source file:PaintExample.java

/**
 * Constructs a PaintSurface./*from  ww w .ja va 2  s  .  c  o  m*/
 * <p>
 * paintCanvas must have SWT.NO_REDRAW_RESIZE and SWT.NO_BACKGROUND styles,
 *     and may have SWT.V_SCROLL and/or SWT.H_SCROLL.
 * </p>
 * @param paintCanvas the Canvas object in which to render
 * @param paintStatus the PaintStatus object to use for providing user feedback
 * @param fillColor the color to fill the canvas with initially
 */
public PaintSurface(Canvas paintCanvas, Text statusText, Color fillColor) {
    this.paintCanvas = paintCanvas;
    this.statusText = statusText;
    clearStatus();

    /* Set up the drawing surface */
    Rectangle displayRect = paintCanvas.getDisplay().getClientArea();
    imageWidth = displayRect.width;
    imageHeight = displayRect.height;
    image = new Image(paintCanvas.getDisplay(), imageWidth, imageHeight);

    imageFDC.gc = new GC(image);
    imageFDC.gc.setBackground(fillColor);
    imageFDC.gc.fillRectangle(0, 0, imageWidth, imageHeight);
    displayFDC.gc = new GC(paintCanvas);

    /* Initialize the session */
    setPaintSession(null);

    /* Add our listeners */
    paintCanvas.addDisposeListener(new DisposeListener() {
        public void widgetDisposed(DisposeEvent e) {
            displayFDC.gc.dispose();
        }
    });
    paintCanvas.addMouseListener(new MouseAdapter() {
        public void mouseDown(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseDown(event);
        }

        public void mouseUp(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseUp(event);
        }

        public void mouseDoubleClick(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseDoubleClick(event);
        }
    });
    paintCanvas.addMouseMoveListener(new MouseMoveListener() {
        public void mouseMove(MouseEvent event) {
            processMouseEventCoordinates(event);
            if (paintSession != null)
                paintSession.mouseMove(event);
        }
    });
    paintCanvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent event) {
            if (rubberband.isEmpty()) {
                // Nothing to merge, so we just refresh
                event.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y,
                        event.width, event.height, event.x, event.y, event.width, event.height);
            } else {
                /*
                 * Avoid flicker when merging overlayed objects by constructing the image on
                 * a backbuffer first, then blitting it to the screen.
                 */
                // Check that the backbuffer is large enough
                if (paintImage != null) {
                    Rectangle rect = paintImage.getBounds();
                    if ((event.width + event.x > rect.width) || (event.height + event.y > rect.height)) {
                        paintFDC.gc.dispose();
                        paintImage.dispose();
                        paintImage = null;
                    }
                }
                if (paintImage == null) {
                    Display display = getDisplay();
                    Rectangle rect = display.getClientArea();
                    paintImage = new Image(display, Math.max(rect.width, event.width + event.x),
                            Math.max(rect.height, event.height + event.y));
                    paintFDC.gc = new GC(paintImage);
                }
                // Setup clipping and the FDC
                Region clipRegion = new Region();
                event.gc.getClipping(clipRegion);
                paintFDC.gc.setClipping(clipRegion);
                clipRegion.dispose();

                paintFDC.xOffset = displayFDC.xOffset;
                paintFDC.yOffset = displayFDC.yOffset;
                paintFDC.xScale = displayFDC.xScale;
                paintFDC.yScale = displayFDC.yScale;

                // Merge the overlayed objects into the image, then blit
                paintFDC.gc.drawImage(image, displayFDC.xOffset + event.x, displayFDC.yOffset + event.y,
                        event.width, event.height, event.x, event.y, event.width, event.height);
                rubberband.draw(paintFDC);
                event.gc.drawImage(paintImage, event.x, event.y, event.width, event.height, event.x, event.y,
                        event.width, event.height);
            }
        }
    });
    paintCanvas.addControlListener(new ControlAdapter() {
        public void controlResized(ControlEvent event) {
            handleResize();
        }
    });

    /* Set up the paint canvas scroll bars */
    ScrollBar horizontal = paintCanvas.getHorizontalBar();
    horizontal.setVisible(true);
    horizontal.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent event) {
            scrollHorizontally((ScrollBar) event.widget);
        }
    });
    ScrollBar vertical = paintCanvas.getVerticalBar();
    vertical.setVisible(true);
    vertical.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent event) {
            scrollVertically((ScrollBar) event.widget);
        }
    });
    handleResize();
}

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