Ich versuche, eine Grenze über a zu ziehenText in SWT ...
Das habe ich jetzt:

public class BorderedText erweitert Text {

public BorderedText(Composite parent, int style) {
    super(parent, style);
    addPaintListener(new PaintListener() {

        @Override
        public void paintControl(PaintEvent e) {
            e.gc.setAntialias(SWT.ON);
            if (isFocusControl()) {
                Color color = new Color(getDisplay(), new RGB(82, 168, 236));
                e.gc.setAlpha(200);
                e.gc.setForeground(color);
                Rectangle rect = new Rectangle(0,0, getClientArea().width-1, getClientArea().height-1);

                Transform t = new Transform(getDisplay());
                e.gc.setTransform(t);

                e.gc.drawRoundRectangle(0, 0, rect.width,  rect.height, 4,4);
            } else {
                e.gc.setForeground(SWTResourceManager.getColor(SWT.COLOR_GRAY));
                Rectangle rect = new Rectangle(0,0, getClientArea().width-1, getClientArea().height-1);

                e.gc.drawRectangle(rect);
            }
        }
    });

Wenn die Komponente den Fokus erhält, ist er so

Aber wenn ich etwas tippe, ist er durcheinander geraten

Was vermisse ich?

BEARBEITEN
Ich habe aufgegebenText und fertig mitStyledText

public class BorderedText erweitert StyledText {

public BorderedText(Composite parent) {
    super(parent, SWT.WRAP);

    setTabStops(new int[] {0});
    addPaintListener(new PaintListener() {

        @Override
        public void paintControl(PaintEvent e) {
            e.gc.setAntialias(SWT.ON);
            if(isFocusControl()){
                e.gc.setForeground(SWTResourceManager.getColor(SWT.COLOR_LIST_SELECTION));
                e.gc.drawRoundRectangle(0, 0, getClientArea().width-1, getClientArea().height-1, 6,6);
            } else {
                e.gc.setForeground(SWTResourceManager.getColor(SWT.COLOR_GRAY));
                e.gc.drawRoundRectangle(0, 0, getClientArea().width-1, getClientArea().height-1, 6,6);
            }
        }
    });

    addFocusListener(new FocusListener() {

        @Override
        public void focusLost(FocusEvent e) {
            redraw();
        }

        @Override
        public void focusGained(FocusEvent e) {
            redraw();
        }
    });

    addControlListener(new ControlListener() {

        @Override
        public void controlResized(ControlEvent e) {
            redraw();
        }

        @Override
        public void controlMoved(ControlEvent e) {
            redraw();
        }
    });

addKeyListener(new KeyAdapter() {
        @Override
        public void keyPressed(KeyEvent e) {
            if(e.character == SWT.TAB){
                e.doit = false;
                traverse(SWT.TRAVERSE_TAB_NEXT);
            }
        }
    });
}

@Override
protected void checkSubclass() {
    //
}

@Override
protected void checkWidget() {
    //
}