使用StyledCellLabelProvider解决了问题。告诉我是否要查看一些代码。 编辑： 我们使用它来显示验证错误，因此在这里忽略验证内容：
public class ValidationCellLabelProvider extends StyledCellLabelProvider { private static final int DELAY = 200; private static final int SHIFT_X = 5; private static final int SHIFT_Y = 5; private static final int DISPLAY = 5000; private CellLabelProvider provider; private String propertyName; private final StyleRange[] styleRanges = new StyleRange[1]; public ValidationCellLabelProvider(CellLabelProvider provider, String propertyName) { super(StyledCellLabelProvider.COLORS_ON_SELECTION); this.provider = provider; this.propertyName = propertyName; this.setOwnerDrawEnabled(true); } @Override public void initialize(ColumnViewer viewer, ViewerColumn column) { super.initialize(viewer, column); final StyleRange styleRange = new StyleRange(); styleRange.foreground = Display.getCurrent().getSystemColor(SWT.COLOR_WHITE); styleRange.background = Display.getCurrent().getSystemColor(SWT.COLOR_RED); styleRanges[0] = styleRange; } @Override public void update(ViewerCell cell) { provider.update(cell); if (cell.getStyleRanges() == null) { cell.setStyleRanges(styleRanges); } if (cell.getElement() instanceof IValidable) { IValidable model = (IValidable) cell.getElement(); if (!ControllerRegistry.getCurrentViolations().getViolations(model.getModelId(), propertyName).isEmpty()) { if (cell.getText().isEmpty()) { cell.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_RED)); cell.setImage(FieldDecorationRegistry.getDefault().getFieldDecoration(FieldDecorationRegistry.DEC_ERROR).getImage()); } else { if (styleRanges[0].length < cell.getText().length()) { styleRanges[0].length = cell.getText().length(); } } } else { if (cell.getImage() != null) { cell.setImage(null); } cell.setStyleRanges(null); } } super.update(cell); } //mine @Override protected void paint(Event event, Object element) { if (element instanceof IValidable) { IValidable model = (IValidable) element; if (!ControllerRegistry.getCurrentViolations().getViolations(model.getModelId(), propertyName).isEmpty()) { int width = 1000; int x = event.x; int y = event.y; int height = event.height - 1; GC gc = event.gc; Color oldBackground = gc.getBackground(); gc.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_DARK_RED)); gc.fillRectangle(x, y, width, height); gc.setBackground(oldBackground); } } super.paint(event, element); } //----- @Override public String getToolTipText(Object element) { String ret = null; if (element instanceof IValidable) { List<ConstraintViolation> constraintViolations = ControllerRegistry.getCurrentViolations().getViolations( ((IValidable) element).getModelId(), propertyName); if (!constraintViolations.isEmpty()) { ret = ValidationHelper.getMessage(constraintViolations); } } if (ret != null) { ret = ret.length() > 0 ? ret.toString() : null; } return ret; } @Override public int getToolTipDisplayDelayTime(Object object) { return DELAY; } @Override public Point getToolTipShift(Object object) { return new Point(SHIFT_X, SHIFT_Y); } @Override public int getToolTipTimeDisplayed(Object object) { return DISPLAY; }}
