AbstractDecoratorWithLabel.java 文件源码

/**
 * Set the widget that the EditorPanel will display. This method will automatically call
 * {@link #setEditor}.
 *
 * @param pwidget a {@link IsEditor} widget
 */
@Override
@UiChild(limit = 1, tagname = "widget")
public void setChildWidget(final TakesValue<T> pwidget) {
  this.widget = (Widget) pwidget;
  this.contents.add(this.widget);
  this.setEditor(new ExtendedValueBoxEditor<>(pwidget, this));
  if (pwidget instanceof HasFocusHandlers) {
    ((HasFocusHandlers) pwidget)
        .addFocusHandler(pevent -> AbstractDecoratorWithLabel.this.addStyleToLabel());
  }
  if (pwidget instanceof HasBlurHandlers) {
    ((HasBlurHandlers) pwidget).addBlurHandler(pevent -> {
      boolean hide = true;
      if (AbstractDecoratorWithLabel.this.widget instanceof TakesValue<?>) {
        hide = StringUtils.isEmpty(Objects
            .toString(((TakesValue<?>) AbstractDecoratorWithLabel.this.widget).getValue(), null));
      }
      if (hide) {
        AbstractDecoratorWithLabel.this.removeStyleFromLabel();
      }
    });
  }
}