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

Introduction

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

Prototype

@Override
    public boolean setFocus() 

Source Link

Usage

From source file:CanvasTranverseEvent.java

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

    final Canvas c = new Canvas(shell, SWT.BORDER);
    c.setBounds(10, 50, 100, 32);/*from  ww  w  .  j a va 2  s . c  o m*/
    c.addListener(SWT.Traverse, new Listener() {
        public void handleEvent(Event e) {
            switch (e.detail) {
            /* Do tab group traversal */
            case SWT.TRAVERSE_ESCAPE:
                System.out.println("SWT.TRAVERSE_ESCAPE");
                break;
            case SWT.TRAVERSE_RETURN:
            case SWT.TRAVERSE_TAB_NEXT:
                System.out.println("SWT.TRAVERSE_TAB_NEXT");
                break;
            case SWT.TRAVERSE_TAB_PREVIOUS:
            case SWT.TRAVERSE_PAGE_NEXT:
            case SWT.TRAVERSE_PAGE_PREVIOUS:
                e.doit = true;
                break;
            }
        }
    });

    Text t = new Text(shell, SWT.SINGLE | SWT.BORDER);
    t.setBounds(10, 85, 100, 32);

    c.setFocus();
    shell.setSize(200, 200);
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}

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From source file:org.eclipse.swt.snippets.Snippet21.java

public static void main(String[] args) {
    Display display = new Display();
    final Color red = display.getSystemColor(SWT.COLOR_RED);
    final Color blue = display.getSystemColor(SWT.COLOR_BLUE);
    Shell shell = new Shell(display);
    shell.setText("Snippet 21");
    Button b = new Button(shell, SWT.PUSH);
    Rectangle clientArea = shell.getClientArea();
    b.setBounds(clientArea.x + 10, clientArea.y + 10, 100, 32);
    b.setText("Button");
    shell.setDefaultButton(b);//w ww.  j a  va2s  . c  o  m
    final Canvas c = new Canvas(shell, SWT.BORDER);
    c.setBounds(10, 50, 100, 32);
    c.addListener(SWT.Traverse, e -> {
        switch (e.detail) {
        /* Do tab group traversal */
        case SWT.TRAVERSE_ESCAPE:
        case SWT.TRAVERSE_RETURN:
        case SWT.TRAVERSE_TAB_NEXT:
        case SWT.TRAVERSE_TAB_PREVIOUS:
        case SWT.TRAVERSE_PAGE_NEXT:
        case SWT.TRAVERSE_PAGE_PREVIOUS:
            e.doit = true;
            break;
        }
    });
    c.addListener(SWT.FocusIn, e -> c.setBackground(red));
    c.addListener(SWT.FocusOut, e -> c.setBackground(blue));
    c.addListener(SWT.KeyDown, e -> System.out.println("KEY"));
    Text t = new Text(shell, SWT.SINGLE | SWT.BORDER);
    t.setBounds(10, 85, 100, 32);

    Text r = new Text(shell, SWT.MULTI | SWT.BORDER);
    r.setBounds(10, 120, 100, 32);

    c.setFocus();
    shell.setSize(200, 200);
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}

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From source file:Snippet21.java

public static void main(String[] args) {
    Display display = new Display();
    final Color red = display.getSystemColor(SWT.COLOR_RED);
    final Color blue = display.getSystemColor(SWT.COLOR_BLUE);
    Shell shell = new Shell(display);
    Button b = new Button(shell, SWT.PUSH);
    b.setBounds(10, 10, 100, 32);//from w ww  .  j a  v  a2s  . c o m
    b.setText("Button");
    shell.setDefaultButton(b);
    final Canvas c = new Canvas(shell, SWT.BORDER);
    c.setBounds(10, 50, 100, 32);
    c.addListener(SWT.Traverse, new Listener() {
        public void handleEvent(Event e) {
            switch (e.detail) {
            /* Do tab group traversal */
            case SWT.TRAVERSE_ESCAPE:
            case SWT.TRAVERSE_RETURN:
            case SWT.TRAVERSE_TAB_NEXT:
            case SWT.TRAVERSE_TAB_PREVIOUS:
            case SWT.TRAVERSE_PAGE_NEXT:
            case SWT.TRAVERSE_PAGE_PREVIOUS:
                e.doit = true;
                break;
            }
        }
    });
    c.addListener(SWT.FocusIn, new Listener() {
        public void handleEvent(Event e) {
            c.setBackground(red);
        }
    });
    c.addListener(SWT.FocusOut, new Listener() {
        public void handleEvent(Event e) {
            c.setBackground(blue);
        }
    });
    c.addListener(SWT.KeyDown, new Listener() {
        public void handleEvent(Event e) {
            System.out.println("KEY");
            for (int i = 0; i < 64; i++) {
                Color c1 = red, c2 = blue;
                if (c.isFocusControl()) {
                    c1 = blue;
                    c2 = red;
                }
                c.setBackground(c1);
                c.update();
                c.setBackground(c2);
            }
        }
    });
    Text t = new Text(shell, SWT.SINGLE | SWT.BORDER);
    t.setBounds(10, 85, 100, 32);

    Text r = new Text(shell, SWT.MULTI | SWT.BORDER);
    r.setBounds(10, 120, 100, 32);

    c.setFocus();
    shell.setSize(200, 200);
    shell.open();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch())
            display.sleep();
    }
    display.dispose();
}

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