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:DrawFocusRectangle.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);

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_RED));
            e.gc.drawFocus(5, 5, 200, 10);
        }/*w w w.ja  v a2 s . co  m*/
    });

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

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From source file:DrawStringLineTabSWT.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);

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            e.gc.drawString("www.\njava2s\t.com", 5, 5);
        }//w w w .ja v  a2  s . c o m
    });

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

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From source file:GCColorChange.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) {

            e.gc.setForeground(display.getSystemColor(SWT.COLOR_BLUE));
            e.gc.drawText("I'm in blue!", 20, 20);
        }/*ww w  .jav  a  2 s.  c o  m*/
    });

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

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From source file:DrawingProcessNewLine.java

public static void main(String[] args) {
    final Display display = new Display();
    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) {
            e.gc.drawText("www.\njava2s\t.com", 5, 5, true);
            e.gc.drawText("www.\njava2s\t.com", 5, 55, false);

        }/*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:FontSystemGettingSWT.java

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

            e.gc.setFont(display.getSystemFont());

            e.gc.drawText(display.getSystemFont().getFontData()[0].getName(), 5, 5);
        }//from   ww w  .  j  a v  a 2s  .com
    });

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

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From source file:DrawPointLineWidth.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);

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Canvas canvas = (Canvas) e.widget;
            int maxX = canvas.getSize().x;
            int maxY = canvas.getSize().y;

            int halfX = (int) maxX / 2;
            int halfY = (int) maxY / 2;

            e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_BLUE));
            e.gc.setLineWidth(10);/*  ww  w.j ava  2  s. c o m*/
            e.gc.drawLine(halfX, 0, halfX, maxY);
            e.gc.drawLine(0, halfY, maxX, halfY);
        }
    });

    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);//from www  . j a  v  a 2s  .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.drawRoundRectangle(10, 10, 200, 200, 30, 60);

        }
    });

    shell.open();
    while (!shell.isDisposed()) {
        if (!d.readAndDispatch())
            d.sleep();
    }
    d.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 ava 2  s  . c om*/

    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.setForeground(e.display.getSystemColor(SWT.COLOR_BLACK));
            e.gc.drawOval(100, 20, 100, 50);

        }
    });

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

---

From source file:DrawPolygonSWT.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);

    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));

            // Create the points for drawing a triangle in the upper left
            int[] upper_left = { 0, 0, 200, 0, 0, 200 };

            // Create the points for drawing a triangle in the lower right
            int[] lower_right = { x, y, x, y - 200, x - 200, y };

            // Draw the triangles
            e.gc.fillPolygon(upper_left);
            e.gc.fillPolygon(lower_right);
        }//w  ww . j  av a2 s  . com
    });

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

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From source file:SineFunctionPlotting.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);

    canvas.addPaintListener(new PaintListener() {
        public void paintControl(PaintEvent e) {
            Canvas canvas = (Canvas) e.widget;
            int maxX = canvas.getSize().x;
            int maxY = canvas.getSize().y;

            // Calculate the middle
            int halfX = (int) maxX / 2;
            int halfY = (int) maxY / 2;

            // Set the line color and draw a horizontal axis
            e.gc.setForeground(e.display.getSystemColor(SWT.COLOR_BLACK));
            e.gc.drawLine(0, halfY, maxX, halfY);

            // Draw the sine wave
            for (int i = 0; i < maxX; i++) {
                e.gc.drawPoint(i, getNormalizedSine(i, halfY, maxX));
            }/*from w  w w  .  j a  v  a  2s  .  c om*/
        }
    });

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

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