BasicPagingImageGrid.java 文件源码

public void add(Widget widget) {
    if (widget instanceof HasClickHandlers && clickHandler!=null) {
        ((HasClickHandlers) widget).addClickHandler(clickHandler);
    }
    if (widget instanceof HasDoubleClickHandlers && doubleClickHandler!=null) {
        ((HasDoubleClickHandlers) widget).addDoubleClickHandler(doubleClickHandler);
    }
    if (widget instanceof HasErrorHandlers && errorHandler!=null) {
        ((HasErrorHandlers) widget).addErrorHandler(errorHandler);
    }
    if (widget instanceof HasMouseOutHandlers && mouseOutHandler!=null) {
        ((HasMouseOutHandlers) widget).addMouseOutHandler(mouseOutHandler);
    }
    if (widget instanceof HasMouseOverHandlers && mouseOverHandler!=null) {
        ((HasMouseOverHandlers) widget).addMouseOverHandler(mouseOverHandler);
    }
    flowpanel.add(widget);
}