所以我试图为TableView中插入的每个变量添加一个ChoiceBox。
Users.java:
Users(String userName , Integer userAge , ChoiceBox employed)
{
this.userName = userName ;
this.userAge = userAge ;
this.employed= employed;
}
//getters and setters
Main.java:
ObservableList<Users>userList = FXCollections.observableArrayList();
TableView<Users> userTable = new TableView();
TableColumn<Users, String> nameCol = new TableColumn();
TableColumn<Users, Integer> ageCol = new TableColumn();
TableColumn<Users, ChoiceBox> employCol = new TableColumn();
private ChoiceBox createBox(){
ChoiceBox box = new ChoiceBox();
box.getItems.addAll("true" , "false");
box.setValue("true");
return box;
}
userList.addAll(new User("James" , 47 , createBox()));
Everything编译并运行得很好,但我无法获得用户点击的box
的引用。我尝试通过选择模型获得它:
userTable.getSelectionModel().getSelectedItem().employed;
但这只是给了我一个NullPointerException。如果用户选择&#34; true&#34;我需要能够选择选择框。 ,然后它会显示在文本字段中,但这很容易解决,我实际上无法将实例带到选择框。我已经提到过:
Getting selected item from a JavaFX TableView
javafx: attach ChoiceBox to a TableCell on a TableColumn during Edit
ChoiceBox with custom Item in a TableView
但无济于事。我也试过使用多种变体
ChoiceBoxTableCell
和
ChoiceBoxTableList
但是这些甚至无法编译,我不断收到回调错误。
答案 0 :(得分:0)
Callback<TableColumn<Users, String>, TableCell<Users, String>> cellFactory
= //
new Callback<TableColumn<Users, String>, TableCell<Users, String>>() {
@Override
public TableCell call(final TableColumn<Users, String> param) {
final TableCell<Users, String> cell = new TableCell<Users, String>() {
final ChoiceBox createBox(){
ChoiceBox box = new ChoiceBox();
box.getItems.addAll("true" , "false");
box.setValue("true");
@Override
public void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setGraphic(null);
setText(null);
} else {
setGraphic(createBox);
setText(null);
}
}
};
return cell;
}
};
employCol.setCellFactory(cellFactory);