如何在treetableview中为第一级孩子设置样式 [英] How to set style for first level child in treetableview

问题描述

我想为所有第一个孩子设置顶部边框，以便对于一个孩子，数据在一行中查找。
但是我无法为这些行设置id。我尝试了以下代码，但没有帮助。

I want to set the top border just for all the first child so that for one child the data looks in one row. but I'm unable to set the id for those rows. I tried the following code but it didn't help.

final PseudoClass firstRowClass = PseudoClass.getPseudoClass("first-child");

devWorkTabBenchtable.setRowFactory(new Callback<TreeTableView<DevWorkTabBench>, TreeTableRow<DevWorkTabBench>>() {

    @Override
    public TreeTableRow<DevWorkTabBench> call(TreeTableView<DevWorkTabBench> param) {
        TreeTableRow<DevWorkTabBench> row = new TreeTableRow<>();
        row.treeItemProperty().addListener(new ChangeListener<TreeItem<DevWorkTabBench>>() {
            int i = 0;

            @Override
            public void changed(ObservableValue<? extends TreeItem<DevWorkTabBench>> observable, TreeItem<DevWorkTabBench> oldValue, TreeItem<DevWorkTabBench> newValue) {
                if (i < param.getRoot().getChildren().size()) {
                    row.pseudoClassStateChanged(firstRowClass, newValue == param.getRoot().getChildren().get(i));
                }
                i++;
            }
        });
        return row;
    }
});

我应该使用什么？请指导我。

What should I use? please guide me.

推荐答案

试试这个

treeTableView.setRowFactory( new Callback<TreeTableView<DevWorkTabBench>, TreeTableRow<DevWorkTabBench>>()
{
    @Override
    public TreeTableRow<DevWorkTabBench> call( TreeTableView<DevWorkTabBench> param )
    {
        TreeTableRow<DevWorkTabBench> row = new TreeTableRow<>();
        row.treeItemProperty().addListener( new ChangeListener<TreeItem<DevWorkTabBench>>()
        {
            @Override
            public void changed( ObservableValue<? extends TreeItem<DevWorkTabBench>> observable, TreeItem<DevWorkTabBench> oldValue, TreeItem<DevWorkTabBench> newValue )
            {
                row.pseudoClassStateChanged( firstRowClass, param.getRoot().getChildren().contains( newValue ) );
            }
        } );
        return row;
    }
} );

---

---

我该怎么办？为不同级别应用多个伪类？

How can I apply multiple pseudo classes for different levels?

你可以得到 TreeItem 的javase / 8 / javafx / api / javafx / scene / control / TreeItem.html＃valuePropertyrel =nofollow> valueProperty 并决定哪个要申请的css类：

You can get the valueProperty of the TreeItem and decide which css class to apply:

DevWorkTabBench bench = newValue.getValue();

row.pseudoClassStateChanged( thirdLevelClass, bench.getLevel() == 3 );
// or
row.pseudoClassStateChanged( MyCSSUtils.getClassByLevel(bench.getLevel()), true );

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