问题描述
我已经在互联网上搜索了一段时间关于用 TableView
填充 ComboBox
的单元格的解释,但每个解释都使用诸如 :
TableView<SomeObject> tableView = new TableView<>();
TableColumn<SomeObject,String> column = new TableColumn<>("property");
ObservableList<String> list = FXCollections.observableArrayList("option1","option2","option3");
column.setCellValueFactory(new PropertyValueFactory<>("property"));
column.setCellFactory(ComboBoxTableCell.forTableColumn(list);
tableView.getColumns().add(column);
... 在另一个类中定义了 SomeObject
。
关键是,我正在构建一个 GUI,其中我无法定义对象来填充任何 TableView
(因为我无法预测我的表将包含的列数)。我只知道我的 TableView
将充满 String
,并且前两列将始终具有相同的标题(“N°”和“Truth”)。没有其他的。所以我不能使用上面的代码,因为我没有任何 "property"
可以填写。
这里是我如何填充我的 TableView
,没有 ComboBox
,(它工作正常),我的数据被称为 rawData
,它是一个 Partionner
(下面的代码) :
ObservableList<ObservableList<String>> data = FXCollections.observableArrayList();
for(int i = 1; i < rawData.size(); i++){
// Begin at i = 1 because the first raw (i = 0) is the names of the columns.
data.add(FXCollections.observableArrayList(rawData.get(i)));
}
tableView.setItems(data);
for(int i = 0; rawData.get(0).size(); i++){
final int cuurentColumn = i;
TableColumn<ObservableList<String>,String> column = new TableColumn<>((String) rawData.get(0).get(i)); // Here are the columns titles.
column.setCellValueFactory(param -> new ReadOnlyObjectWrapper<>(param.getValue().get(currentColumn)));
column.setStyle("-fx-alignment: CENTER");
tableView.getColumns().add(column);
}
其中 Partionner
是:
public final class Partionner<T> extends AbstractList<List<T>>{
private final List<T> list;
private final int chunkSize;
public Partionner(List<T> list,int chunkSize){
this.list = list;
this.chunkSize = chunkSize;
}
public static <T> Partitionner<T> ofSize(List<T> list,int chunkSize){
return new Partionner<>(list,chunkSize);
}
@Override
public List<T> get(int index){
int start = index * chunkSize;
int end = Math.min(start + chunkSize,list.size());
if(start > end){
throw new indexoutofboundsexception("OOB Partitionner");
}
return new ArrayList<>(list.subList(start,end));
}
public int size(){
return (int) Math.ceil((double) list.size() / (double) chunkSize);
}
// You can create a Partionner with :
Partitionner partitionner = Partitionner.ofSize(arrayList,length);
// Where arraylist is an ArrayList<String> and length it's size
}
从实际上来自 CSV 的所有这些数据中,我想为第二列“Truth”的每个单元格使用组合框。我想过类似的事情:
ObservableList<ObservableList<String>> data = FXCollections.observableArrayList();
for(int i = 1; i < rawData.size(); i++){
// Begin at i = 1 because the first raw (i = 0) is the names of the columns.
data.add(FXCollections.observableArrayList(rawData.get(i)));
}
tableView.setItems(data);
for(int i = 0; i < rawData.get(0).size(); i++){
final int currentColumn = i;
if(i == 1){
// So it's here I'm completly disabled to fill this code :/
// Begin of bullshit
TableColumn<ObservableList<String>,String> column = new TableColumn<>((String) rawData.get(0).get(i));
ObservableList<String> possibleTruth = FXCollections.obervableArrayList("1","2","3");
final ComboBox<String> comboBox = new ComboBox<>(possibleTruth);
column.setCellValueFactory(......);
column.setCellFactory(......);
tableView.getColumns.add(col);
// End of bullshit
} else {
TableColumn<ObservableList<String>,String> column = new TableColumn<>((String) rawData.get(0).get(i));
column.setCellValueFactory(param -> new ReadOnlyObjectWrapper<>(param.getValue().get(currentColumn)));
column.setStyle("-fx-alignment: CENTER");
tableView.getColumns().add(column);
}
}
有什么想法可以填充我的代码吗?如果您的解决方案有效,请随时离开您的贝宝哈哈 (jk) :)
----------- 这是一个最小的可重现示例 -----------
主类:
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
primaryStage.setTitle("Hello World");
primaryStage.setResizable(false);
Scene scene = new Scene(root,1280,720);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
类控制器:
public class Controller {
@FXML public TableView tableView;
public ArrayList<String> inputData;
public Partitionner rawData;
public void initialize(){
inputData = new ArrayList<>();
inputData.add("N°");
inputData.add("Truth");
inputData.add("Col A");
inputData.add("Col B");
inputData.add("1");
inputData.add("t1");
inputData.add("valA1");
inputData.add("valB1");
inputData.add("2");
inputData.add("t2");
inputData.add("valA2");
inputData.add("valB2");
inputData.add("3");
inputData.add("t3");
inputData.add("valA3");
inputData.add("valB3");
rawData = Partitionner.ofSize(inputData,4);
System.out.println(rawData);
}
public void populateTableView (){
ObservableList<ObservableList<String>> data = FXCollections.observableArrayList();
for(int i = 1; i < rawData.size(); i++){
// Begin at i = 1 because the first raw (i = 0) is the names of the columns.
data.add(FXCollections.observableArrayList(rawData.get(i)));
}
tableView.setItems(data);
for(int i = 0; i < rawData.get(0).size(); i++){
final int currentColumn = i;
if(i == 1){
// Trying to fill the "Truth" column with a comboBox in each cell containing t1,t2 and t3.
TableColumn<ObservableList<String>,String> column = new TableColumn<>((String) rawData.get(0).get(i));
ObservableList<String> possibleTruth = FXCollections.observableArrayList("t1","t2","t3");
column.setCellFactory(ComboBoxTableCell.forTableColumn(possibleTruth));
tableView.getColumns().add(column);
} else {
TableColumn<ObservableList<String>,String> column = new TableColumn<>((String) rawData.get(0).get(i));
column.setCellValueFactory(param -> new ReadOnlyObjectWrapper<>(param.getValue().get(currentColumn)));
column.setStyle("-fx-alignment: CENTER");
tableView.getColumns().add(column);
}
}
}
}
sample.fxml 文件:
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefheight="752.0" prefWidth="1162.0" xmlns="http://javafx.com/javafx/15.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
<children>
<Button layoutX="140.0" layoutY="683.0" mnemonicParsing="false" onAction="#populateTableView" prefheight="25.0" prefWidth="161.0" text="Fill Data" />
<TableView fx:id="tableView" layoutX="43.0" layoutY="39.0" prefheight="585.0" prefWidth="1073.0" />
</children>
</AnchorPane>
不要忘记添加 Partitionner
类,它就在上面。
解决方法
只需组合您已有的部分即可。以下不是您想要的吗?
for(int i = 0; rawData.get(0).size(); i++){
final int currentColumn = i;
TableColumn<ObservableList<String>,String> column = new TableColumn<>((String) rawData.get(0).get(i);
column.setCellValueFactory(param -> new ReadOnlyObjectWrapper<>(param.getValue().get(currentColumn)));
column.setStyle("-fx-alignment: CENTER");
tableView.getColumns().add(column);
if(i == 1){
ObservableList<String> possibleTruth = FXCollections.obervableArrayList("1","2","3");
column.setCellFactory(ComboBoxTableCell.forTableColumn(possibleTruth));
}
}