Question

在TreeViewer中添加元素后刷新TreeViewer不起作用，但在TreeViewer中删除元素后刷新TreeViewer工作。像我这样的删除/删除操作，EntityElement是树节点的基本类型：

public void run() {
                // TODO Auto-generated method stub
                IStructuredSelection selection = (IStructuredSelection) viewSite.getSelectionProvider().getSelection();
                Object firstElement = selection.getFirstElement();  
                if (firstElement instanceof EntityElement) {
                    EntityElement entityElement  = (EntityElement)firstElement;
                    entityElement.getParent().removeChildren(entityElement);
                    tv.refresh(entityElement.getParent(), false);
                }
            }

My Add Action就像这样，object是选定的树节点Object：

public void run() {
    // TODO Auto-generated method stub
    if (object instanceof EntityElement) {
            EntityElement demoElement = ((EntityElement) object).getChildren().get(0);
            ((EntityElement) object).getChildren().add(demoElement); //Add its first child by default
            Variable.treeViewer.refresh((EntityElement) object);
        }
    }
}

我想问为什么删除操作有效，但添加操作不起作用？

Answer 1

好的。这个问题已经解决了。当我新建EntityElement并添加它时，调用refresh（）TreeViewer刷新并显示新节点，我很好奇为什么

EntityElement demoElement = ((EntityElement) object).getChildren().get(0);
             ((EntityElement) object).getChildren().add(demoElement);

不起作用???

Treeviewer刷新无效

1 个答案: