如何在JavaFX中创建表格单元工厂以显示ChoiceBox？ [英] How do you create a table cell factory in JavaFX to display a ChoiceBox?

问题描述

我正在尝试在JavaFX中的TableView中显示ChoiceBox。现在我只是想测试一下我是否可以使用它，所以我在单元工厂内生成假数据，但我甚至无法使其工作。

I am trying to display a ChoiceBox inside of a TableView in JavaFX. Right now I am just trying to test if I can get this working, so I am generating fake data within the cell factory, but I can't even get this to work.

我的IDE给了我错误

forTableColumn (javafx.collections.ObservableList<T>) in ChoiceBoxTableCell cannot be applied
to             (javafx.collections.ObservableList<java.lang.String>)

这是我的代码。

private ListView<RequirementsProperty> guiPropertyList;
private TableColumn<RequirementsProperty, String> guiSpecifierColumn;

guiSpecifierColumn.setCellFactory(
                new Callback<TableColumn<RequirementsProperty, String>, TableCell<RequirementsProperty, String>>() {
                    @Override
                    public TableCell<RequirementsProperty, String> call(TableColumn<RequirementsProperty, String> param) {
                        ObservableList<String> testlist = FXCollections.observableArrayList("A", "B", "C");
                        return ChoiceBoxTableCell.forTableColumn(testlist);
                    }
                });

有谁知道我做错了什么？我现在只想显示包含A，B和C的列表，然后我可以继续显示我自己的数据。

Does anyone know what I am doing wrong? I just want to display the list containing A, B, and C right now, and then I can move on to displaying my own data.

推荐答案

ChoiceBoxTableCell.forTableColumn（...）返回 Callback 本身（即返回 cellFactory ，而非单元格。

ChoiceBoxTableCell.forTableColumn(...) returns a Callback itself (i.e. it returns the cellFactory, not the cell).

你可以这样做

ObservableList<String> testlist = FXCollections.observableArrayList("A", "B", "C");
guiSpecifierColumn.setCellFactory(ChoiceBoxTableCell.forTableColumn(testlist));

如果您自己实施工厂，其电话（...） 方法需要返回实际的单元格。在这种情况下，您只需直接构造 ChoiceBoxTableCell 并将其返回：

If you are implementing the factory yourself, its call(...) method needs to return the actual cell. In this case you would just construct a ChoiceBoxTableCell directly and return it:

guiSpecifierColumn.setCellFactory(
    new Callback<TableColumn<RequirementsProperty, String>, TableCell<RequirementsProperty, String>>() {
         @Override
         public TableCell<RequirementsProperty, String> call(TableColumn<RequirementsProperty, String> param) {
              ObservableList<String> testlist = FXCollections.observableArrayList("A", "B", "C");
              return new ChoiceBoxTableCell(testlist);
         }
    });

这篇关于如何在JavaFX中创建表格单元工厂以显示ChoiceBox？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！