TreeTableView：设置一行不可编辑

Question

我想根据树中的级别控制 TreeTableView 某些行的样式。setRowFactory如果此行是表根的第一级子级的一部分，我使用并应用了样式。样式工作正常，但我也想禁用单击这些行的复选框。我能够，setDisable(true)但这也禁用了 TreeItem 的扩展，并且SetEditable(false)似乎没有任何效果。

编辑：我的理解是必须将表设置为可编辑，然后列在默认情况下是可编辑的。但是如果我设置了，TreeTableRow.setEditable(true);或者TreeTableRow.setEditable(false);我从来没有看到任何效果。setEditable 的描述似乎正是我想要的，但我无法那样使用它。

void javafx.scene.control.Cell.setEditable(boolean arg0)

setEditable public final void setEditable(boolean value)

允许某些单元格无法编辑。这在以下情况下很有用，例如，列表具有“标题行”-标题行 > 可编辑没有意义，因此它们应该将可编辑设置为 false。参数：value - 表示单元格是否可编辑的布尔值。如果 >true，单元格可编辑，如果为 false，单元格不可编辑。

主要的：

public class TreeTableViewRowStyle extends Application {

    public static void main(String[] args) {

        launch(args);

    }

    @Override

    public void start(Stage stage) throws Exception {

        // create the treeTableView and colums

        TreeTableView<Person> ttv = new TreeTableView<Person>();

        TreeTableColumn<Person, String> colName = new TreeTableColumn<>("Name");

        TreeTableColumn<Person, Boolean> colSelected = new TreeTableColumn<>("Selected");

        colName.setPrefWidth(100);

        ttv.getColumns().add(colName);

        ttv.getColumns().add(colSelected);

        ttv.setShowRoot(false);

        ttv.setEditable(true);

        // set the columns

        colName.setCellValueFactory(new TreeItemPropertyValueFactory<>("name"));

        colSelected.setCellFactory(CheckBoxTreeTableCell.forTreeTableColumn(colSelected));

Answer 1

基本问题是，没有任何可编辑（也不是像 CheckBoxXX 这样的伪可编辑）树/表单元格尊重它们所在行的可编辑性。我认为这是一个错误。要克服这一问题，您必须扩展（伪）可编辑单元格并使它们尊重行的可编辑性。伪编辑单元格和真实编辑单元格的确切实现是不同的。以下是内嵌示例，对于频繁使用，您可以将它们设为顶级并重复使用。CheckBoxTreeTableCell：子类化并覆盖 updateItem 以重新绑定其禁用的属性，例如colSelected.setCellFactory(c -> {&nbsp; &nbsp; TreeTableCell cell = new CheckBoxTreeTableCell() {&nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; public void updateItem(Object item, boolean empty) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; super.updateItem(item, empty);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (getGraphic() != null) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; getGraphic().disableProperty().bind(Bindings&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; .not(&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; getTreeTableView().editableProperty()&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;.and(getTableColumn().editableProperty())&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;.and(editableProperty())&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;.and(getTreeTableRow().editableProperty())&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ));&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; };&nbsp; &nbsp; return cell;});对于真正的编辑单元格，fi TextFieldTreeTableCell: 覆盖 startEdit 并返回，如果该行不可编辑，则不调用 supercolName.setCellFactory(c -> {&nbsp; &nbsp; TreeTableCell cell = new TextFieldTreeTableCell() {&nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; public void startEdit() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (getTreeTableRow() != null && !getTreeTableRow().isEditable()) return;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; super.startEdit();&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; };&nbsp; &nbsp; return cell;});现在你可以像你一样切换行的可编辑性，稍微改变逻辑以保证在所有情况下完全清理：ttv.setRowFactory(table-> {&nbsp; &nbsp; return new TreeTableRow<Person>(){&nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; public void updateItem(Person pers, boolean empty) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; super.updateItem(pers, empty);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // tbd: check for nulls!&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; boolean isTopLevel = table.getRoot().getChildren().contains(treeItemProperty().get());&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (!isEmpty() && isTopLevel) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if(isTopLevel){&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; setStyle("-fx-background-color:lightgrey;");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; setEditable(false);&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }else{&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; setEditable(true);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; setStyle("-fx-background-color:white;");&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; };});

Answer 2

如果您想禁用特定的 Cell，则在 CellFactory 而不是 RowFactory 中处理禁用逻辑。TreeTableColumn(..)的静态方法是一种方便快速使用的方法。但这不是唯一的方法。您仍然可以为 CheckBoxTreeTableCell 创建自己的工厂。所以代替colSelected.setCellFactory(CheckBoxTreeTableCell.forTreeTableColumn(colSelected));设置 cellfactory 如下，这应该适合你。colSelected.setCellFactory(new Callback<TreeTableColumn<Person, Boolean>, TreeTableCell<Person, Boolean>>() {&nbsp; &nbsp; @Override&nbsp; &nbsp; public TreeTableCell<Person, Boolean> call(TreeTableColumn<Person, Boolean> column) {&nbsp; &nbsp; &nbsp; &nbsp; return new CheckBoxTreeTableCell<Person, Boolean>() {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; @Override&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; public void updateItem(Boolean item, boolean empty) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; super.updateItem(item, empty);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; boolean isTopLevel = column.getTreeTableView().getRoot().getChildren().contains(getTreeTableRow().getTreeItem());&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; setEditable(!isTopLevel);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; };&nbsp; &nbsp; }});