如何在JavaFX中的树视图中获取所有选定的树项

时间:2014-06-05 03:01:17

标签: javafx treeview java-8 getselection

我需要能够在树状视图中获得所有选定项目的更新列表(有多个选择)。

此示例:Tree item select event in javafx2

显示了如何一次响应/识别一个选定的项目。有没有办法一次性获取所有选定的项目?类似于下面假设的非工作代码:

ArrayList<TreeItem> selectedTreeItems = new ArrayList<>();

myTreeView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {
        @Override
        public void changed(ObservableValue observable, Object oldValue, Object newValue) {
            selectedTreeItems.clear();//reset the list. correct?

            //get a new list of children of the root
            ObservableList objects = myTreeView.getRoot().getChildren();

            //loop to get the selected items.
            for (int i = 0; i < objects.size(); i++) {
                TreeItem object = (TreeItem) objects.get(i);
                if (thisObjectIsSelected(object)) {
                    selectedTreeItems.add(object);
                }
            }


        }
    });

    privatevoid thisObjectIsSelected(TreeItem item){
    //what do I do here?
    }

我不确定如何实现我想要的。非常感谢任何帮助!

1 个答案:

答案 0 :(得分:4)

只需观察并参考选择模型getSelectedItems()列表:

myTreeView.getSelectionModel().getSelectedItems().addListener(new ListChangeListener<TreeItem>() {
    @Override
    public void onChanged(Change<? extends TreeItem> change) {
        // myTreeView.getSelectionModel().getSelectedItems() contains all the selected items
    }
});