import com.vaadin.shared.AbstractComponentState; //导入依赖的package包/类
@Override
public void updateCaption(ComponentConnector childConnector) {
    // CAUTION copied from GridLayoutConnector.updateCaption(ComponentConnector childConnector)
    VGridLayout layout = getWidget();
    VGridLayout.Cell cell = layout.widgetToCell.get(childConnector.getWidget());
    AbstractComponentState state = childConnector.getState();
    if (VCaption.isNeeded(state)
            || isContextHelpIconEnabled(state)) {
        VLayoutSlot layoutSlot = cell.slot;
        VCaption caption = layoutSlot.getCaption();
        if (caption == null) {
            // use our own caption widget
            caption = new CubaCaptionWidget(childConnector, getConnection());

            setDefaultCaptionParameters((CubaCaptionWidget)caption);

            Widget widget = childConnector.getWidget();

            layout.setCaption(widget, caption);
        }
        caption.updateCaption();
    } else {
        layout.setCaption(childConnector.getWidget(), null);
        getLayoutManager().setNeedsLayout(this);
    }
}
 

import com.vaadin.shared.AbstractComponentState; //导入依赖的package包/类
/**
 * Updates style names in suggestion popup to help theme building.
 *
 * @param componentState
 *            shared state of the combo box
 */
public void updateStyleNames(AbstractComponentState componentState) {
	debug("VComboBoxMultiselect.SP: updateStyleNames()");
	setStyleName(VComboBoxMultiselect.this.getStylePrimaryName() + "-suggestpopup");
	this.menu.setStyleName(VComboBoxMultiselect.this.getStylePrimaryName() + "-suggestmenu");
	this.status.setClassName(VComboBoxMultiselect.this.getStylePrimaryName() + "-status");
	if (ComponentStateUtil.hasStyles(componentState)) {
		for (String style : componentState.styles) {
			if (!"".equals(style)) {
				addStyleDependentName(style);
			}
		}
	}
}
 

import com.vaadin.shared.AbstractComponentState; //导入依赖的package包/类
@Override
protected boolean isCaptionNeeded(ComponentConnector child) {
    AbstractComponentState state = child.getState();
    return super.isCaptionNeeded(child) || (state instanceof AbstractFieldState
            && ((AbstractFieldState) state).contextHelpText != null
            && !((AbstractFieldState) state).contextHelpText.isEmpty());
}