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:MainClass.java

public static void main(String[] a) {

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

    shell.setSize(250, 200);//from w ww  . 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) {
            Canvas canvas = (Canvas) e.widget;
            int x = canvas.getBounds().width;
            int y = canvas.getBounds().height;

            e.gc.setBackground(e.display.getSystemColor(SWT.COLOR_BLACK));

            int[] upper_left = { 0, 0, 200, 0, 0, 200 };

            int[] lower_right = { x, y, x, y - 200, x - 200, y };

            e.gc.fillPolygon(upper_left);
            e.gc.fillPolygon(lower_right);

        }
    });

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

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From source file:DrawExample.java

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

    Canvas canvas = new Canvas(shell, SWT.NONE);
    canvas.setSize(150, 150);/*  w  w  w  .  j  a va 2s  . c o  m*/
    canvas.setLocation(20, 20);
    shell.open();
    shell.setSize(200, 220);

    GC gc = new GC(canvas);
    gc.drawRectangle(10, 10, 40, 45);
    gc.drawOval(65, 10, 30, 35);
    gc.drawLine(130, 10, 90, 80);
    gc.drawPolygon(new int[] { 20, 70, 45, 90, 70, 70 });
    gc.drawPolyline(new int[] { 10, 120, 70, 100, 100, 130, 130, 75 });
    gc.dispose();

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

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From source file:GCCreateFrom.java

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

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

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            GC gc = new GC(canvas);
            gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
            gc.drawFocus(5, 5, 200, 10);
            gc.drawText("You can draw text directly on a canvas", 60, 60);
            gc.dispose();// w w w . ja va2 s.c o m
        }
    });

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

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From source file:FontChangeSWT.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(), "Helvetica", 18, SWT.NORMAL);
            e.gc.setFont(font);// w w w .j a v  a 2  s.  c  o  m
            e.gc.drawText("My Text", 0, 0);
            font.dispose();

        }
    });

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

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From source file:ImageLoadingFromFile.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");

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

            image.dispose();//  w  ww . j  a va  2s .com
        }
    });

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

---

From source file:ImageDisable.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");

            Image disable = new Image(display, image, SWT.IMAGE_DISABLE);

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

            e.gc.drawImage(image, 10, 50);

            image.dispose();//from  w  w w .  j  a  v  a  2 s .  c o m
            disable.dispose();
        }
    });

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

---

From source file:ImageGrayScale.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");

            Image disable = new Image(display, image, SWT.IMAGE_GRAY);

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

            e.gc.drawImage(image, 10, 50);

            image.dispose();/*from ww  w. java  2 s .c  o m*/
            disable.dispose();
        }
    });

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

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From source file:ImageCopyCreation.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");

            Image copy = new Image(display, image, SWT.IMAGE_COPY);

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

            e.gc.drawImage(copy, 10, 50);

            image.dispose();/*from w  ww . j  a va  2s  . c o m*/
            copy.dispose();
        }
    });

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

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From source file:MainClass.java

public static void main(String[] a) {

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

    shell.setSize(250, 200);//from w  w w . ja v  a2s  .  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.setFont(new Font(display, "Helvetica", 18, SWT.NORMAL));
            e.gc.drawText("www.java2s.com", 0, 0);
        }
    });

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

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From source file:ImageLoadFromClassStream.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;/*from ww  w  . j a  va 2s .  c  om*/
            try {
                image = new Image(display, ImageLoadFromClassStream.class.getResourceAsStream("yourFile.gif"));

            } catch (Exception 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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