Text-Control, selbst gezeichnet

Ein recht großes Manke des SWT-Text-Controls ist, dass der enthaltenden Text im Zustand disabled nicht kopiert werden kann. Ferner ist der Text grau und somit recht schlecht lesbar. Der folgende Code behebt diese beiden Nachteile:

public void setUneditable(final Text text, final boolean uneditable) {
   if (WidgetUtils.canBeUsed(text)) {           
      text.setData(FormToolkit.KEY_DRAW_BORDER, !uneditable);
      text.setData(UNEDITABLE_FLAG_KEY, uneditable);
      text.setEditable(!uneditable);
 
      final String painterAddedKey = "KEY_PAINTER_ADDED";
      final Composite pComp = text.getParent();
      if (uneditable && null == pComp.getData(painterAddedKey)) {
         pComp.setData(painterAddedKey, Boolean.TRUE);
         pComp.addPaintListener(getUneditableBorderPaintListener());
      }
   }
}
 
public static boolean isUneditable(final Control control) {
   return (Boolean)control.getData(UNEDITABLE_FLAG_KEY) ||
      (control instanceof Button && !control.isEnabled()); 
}
 
private PaintListener getUneditableBorderPaintListener() {
   if (uneditableBorderPaintListener == null) {
      uneditableBorderPaintListener = new PaintListener() {
         public void paintControl(PaintEvent event) {
            Composite composite = (Composite) event.widget;
            Control[] children = composite.getChildren();
            GC gc = event.gc;
            gc.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_GRAY);
 
            for (int i = 0; i < children.length; i++) {
               Control c = children[i];
               if ((Boolean)c.getData(UNEDITABLE_FLAG_KEY)) {
                  final Rectangle b = c.getBounds();
                  int x1 = b.x - 1;
                  int x2 = b.x + b.width;
                  int by = b.y + b.height;
                  gc.drawLine(x1, by, x2, by);
                  gc.drawLine(x1, by - 1, x1, by);
                  gc.drawLine(x2, by, x2, by - 1);
               }
            }
         }
      };
   }
   return uneditableBorderPaintListener;
}

Verwendung:

Text myText = ...
setUneditable(myText, true);