java - 当filtertext为空时展开Jface FilteredTree上的所有项目

Question

我有点迷失，遇到以下问题。我正在使用一个扩展“org.eclipse.dialogs.FilterTree”的类。当过滤文本为空时，树中的每个节点都会折叠。但在这种情况下我想扩展树。

有人可以给个提示吗？最好的方法是什么？到目前为止，我已经重写了各种方法，但没有成功。

谢谢

Answer 1

您可以使用TreeViewer#expandAll()展开所有树

Edit 1:

The FilteredTree refreshes the tree on every change to the filter text control, but with some delay (by default 200ms). So adding a modify listener on text control for expanding all tree will at the time show a different set of items (maybe none) and later the refresh job will overwrite the state using its own rules. So either we need to override doCreateRefreshJob() to expand all tree in case of empty string, or override updateToolbar(boolean) which is always called at the end of the refresh job. this is what I tried and it worked:

FilteredTree ft = new FilteredTree(composite, SWT.FULL_SELECTION, p, true) {
    @Override
    protected void updateToolbar(boolean visible) {
        super.updateToolbar(visible);
        treeViewer.expandAll();
    }
};