Example usage for org.eclipse.swt.widgets Canvas Canvas

Introduction

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

Prototype

public Canvas(Composite parent, int style) 

Source Link

Document

Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

Usage

From source file:ImageEmpty.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Image image = new Image(display, 300, 200);
            GC gc = new GC(image);
            gc.drawLine(10, 10, 200, 200);
            gc.dispose();//from w  w w  .j  a  va  2  s  . c o  m

            e.gc.drawImage(image, 10, 10);
            image.dispose();
        }
    });

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

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From source file:CanvasControlAdd.java

public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    Button button = new Button(canvas, SWT.PUSH);
    button.setBounds(10, 10, 300, 40);//w  w w. j  av  a2 s  .  c  o m
    button.setText("You can place widgets on a canvas");

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Rectangle rect = ((Canvas) e.widget).getBounds();
            e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
            e.gc.drawFocus(5, 5, rect.width - 10, rect.height - 10);
            e.gc.drawText("You can draw text directly on a canvas", 60, 60);
        }
    });

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

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From source file:FontDataConstruct.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {

            Font font = new Font(shell.getDisplay(), new FontData("Helvetica", 18, SWT.NORMAL));
            e.gc.setFont(font);//from  w ww. j a  v a2s .c om
            e.gc.drawText("My Text", 0, 0);
            font.dispose();

        }
    });

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

---

From source file:MainClass.java

public static void main(String[] a) {

    final Display d = new Display();
    final Shell shell = new Shell(d);

    shell.setSize(250, 200);//w w  w . j  a  v  a2  s . co m

    shell.setLayout(new FillLayout());

    // Create a canvas
    Canvas canvas = new Canvas(shell, SWT.NONE);

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            e.gc.setLineWidth(10);
            e.gc.drawLine(0, 0, 100, 100);
        }
    });

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

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From source file:ImageDataFromImage.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Image image = new Image(display, "yourFile.gif");

            ImageData data = image.getImageData();

            System.out.println(data.height);

            e.gc.drawImage(image, 10, 10);
            image.dispose();//from  w w w  .ja  v a2  s  . co  m
        }
    });

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

---

From source file:CanvasKeyEvent.java

public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);

    shell.setLayout(new RowLayout());
    final Canvas canvas = new Canvas(shell, SWT.NULL);
    canvas.setSize(500, 500);/*from w ww .  j a va 2s  .c  o  m*/
    canvas.setBackground(display.getSystemColor(SWT.COLOR_YELLOW));

    canvas.addKeyListener(new KeyListener() {
        public void keyPressed(KeyEvent e) {
            GC gc = new GC(canvas);
            Rectangle rect = canvas.getClientArea();
            gc.fillRectangle(rect.x, rect.y, rect.width, rect.height);

            Font font = new Font(display, "Arial", 32, SWT.BOLD);
            gc.setFont(font);

            gc.drawString("" + e.character, 15, 10);

            gc.dispose();
            font.dispose();
        }

        public void keyReleased(KeyEvent e) {
        }
    });

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

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From source file:MainClass.java

public static void main(String[] a) {

    final Display d = new Display();
    final Shell shell = new Shell(d);

    shell.setSize(250, 200);// w w  w  .ja  v a 2 s . c  o m

    shell.setLayout(new FillLayout());

    // Create a canvas
    Canvas canvas = new Canvas(shell, SWT.NONE);

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            // Do some drawing
            Rectangle rect = ((Canvas) e.widget).getBounds();
            e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
            e.gc.drawFocus(5, 5, rect.width - 10, rect.height - 10);
            e.gc.drawText("www.java2s.com", 5, 50,
                    SWT.DRAW_MNEMONIC | SWT.DRAW_DELIMITER | SWT.DRAW_TAB | SWT.DRAW_TRANSPARENT);
        }
    });

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

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From source file:ImageDataManipuatation.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Image image = new Image(display, "yourFile.gif");

            ImageData data = image.getImageData();

            data.setPixel(5, 5, 5);// w w  w .  j  a v  a  2s.  c  o  m

            Image anotherImage = new Image(display, data);
            e.gc.drawImage(anotherImage, 10, 10);
            image.dispose();
        }
    });

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

---

From source file:ImageRotate.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Image image = new Image(display, "yourFile.gif");
            ImageData sd = image.getImageData();

            ImageData dd = new ImageData(sd.height, sd.width, sd.depth, sd.palette);

            int style = SWT.UP;

            boolean up = (style & SWT.UP) == SWT.UP;

            // Run through the horizontal pixels
            for (int sx = 0; sx < sd.width; sx++) {
                // Run through the vertical pixels
                for (int sy = 0; sy < sd.height; sy++) {
                    // Determine where to move pixel to in destination image data
                    int dx = up ? sy : sd.height - sy - 1;
                    int dy = up ? sd.width - sx - 1 : sx;
                    // Swap the x, y source data to y, x in the destination
                    dd.setPixel(dx, dy, sd.getPixel(sx, sy));
                }//  w  w w. ja va 2  s .  c o m
            }

            // Create the vertical image
            Image vertical = new Image(display, dd);

            // Draw the vertical image onto the original GC
            e.gc.drawImage(vertical, 10, 10);

            vertical.dispose();
        }
    });

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

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From source file:ImageLoadingFromFileInputStream.java

public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    shell.setText("Canvas Example");
    shell.setLayout(new FillLayout());

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Image image = null;/*w  w w . j  a  v a  2s .c  om*/
            try {
                image = new Image(display, new FileInputStream("yourFile.gif"));
            } catch (FileNotFoundException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }

            e.gc.drawImage(image, 10, 10);

            image.dispose();
        }
    });

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

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