javafx：在编辑期间将ChoiceBox附加到TableColumn上的TableCell [英] javafx: attach ChoiceBox to a TableCell on a TableColumn during Edit
问题描述
下面的代码是对象的实例方法。
private StringProperty buySell;
// getters
public String getBuySell（）{
return this.buySell.get（）;
}
//返回属性对象
public StringProperty buySellProperty（）{
return this.buySell;
}
// setters
public void setBuySell（String buySell）{
this.buySell.set（buySell）;
}
在我的控制器 class，我已经为 buySell 字符串属性创建了一个 TableColumn ，其代码如下。
当我创建一个事务时， tableView 上会有一个新行。但是，我希望能够编辑buySell tableCell 。
问题：如何嵌入 choicebox ，其值为在， setOnEdit 函数中购买卖，这样当我双击单元格时，它会给我一个选择框？
我的 choicebox 代码如下，但我不知道如何结合这些东西在一起。
ChoiceBox< BuySell> buySellBox = new ChoiceBox<>（）;
buySellBox.getItems（）。addAll（买，卖）;
更新：问题仍未解决。但是，按照
编辑时，使用在单元格中创建 ChoiceBox 的单元工厂。请参阅此回答。
示例：
public class Main extends Application {
@Override
public void start（Stage stage）throws Exception {
TableColumn< Item，String> col1 = new TableColumn（Column1）;
col1.setCellValueFactory（cellData - > cellData.getValue（）。nameProperty（））;
col1.setCellFactory（column - > new TableCel_Edit（））;
TableColumn< Item，Number> col2 = new TableColumn（Column2）;
col2.setCellValueFactory（cellData - > cellData.getValue（）。valueProperty（））;
TableView< Item> table = new TableView（）;
table.setEditable（true）;
table.getItems（）。addAll（loadData（））;
table.getColumns（）。addAll（col1，col2）;
AnchorPane root = new AnchorPane（）;
root.getChildren（）。add（table）;
场景场景=新场景（根）;
stage.setScene（场景）;
stage.show（）;
}
public static void main（String ... args）{
Application.launch（args）;
}
private List< Item> loadData（）{
List< Item> list = new ArrayList（）;
for（int i = 0; i< 10; i ++）{
Item item = new Item（item+ i，i）;
list.add（item）;
}
返回清单;
}
私有类TableCel_Edit扩展TableCell< Item，String> {
ChoiceBox< String> buySellBox = new ChoiceBox<>（）;
public TableCel_Edit（）{
buySellBox.getItems（）。addAll（Buy，Sell）;
buySellBox.getSelectionModel（）。selectedIndexProperty（）。addListener（（obs，oldValue，newValue） - > {
String value = buySellBox.getItems（）。get（newValue.intValue（ ））;
processEdit（value）;
}）;
}
private void processEdit（String value）{
commitEdit（value）;
}
@Override
public void cancelEdit（）{
super.cancelEdit（）;
setText（getItem（））;
setGraphic（null）;
}
@Override
public void commitEdit（String value）{
super.commitEdit（value）;
//（（Item）this.getTableRow（）。getItem（））。setName（value）;
setGraphic（null）;
}
@Override
public void startEdit（）{
super.startEdit（）;
String value = getItem（）;
if（value！= null）{
setGraphic（buySellBox）;
setText（null）;
}
}
@Override
protected void updateItem（String item，boolean empty）{
super.updateItem（item，empty）;
if（item == null || empty）{
setText（null）;
} else {
setText（item）;
}
}
}
}
控制器类中的
更新：
添加以下内容：
fxTransactionLogBuySell.setCellValueFactory（new PropertyValueFactory< Transaction，String>（buySell））;
fxTransactionLogBuySell.setCellFactory（column - > new TableCel_Edit（））;
您还应该添加此类（更改项目到交易）：
class TableCel_Edit扩展TableCell< Item，String> ; {
....
}
The code below are instance methods of an object.
private StringProperty buySell;
// getters
public String getBuySell(){
return this.buySell.get();
}
// return Property Object
public StringProperty buySellProperty(){
return this.buySell;
}
// setters
public void setBuySell(String buySell){
this.buySell.set(buySell);
}
In my Controller class, I have created a TableColumn for buySell string property with the code below.
When I created a transaction, there will be a new row on the tableView. However, I want to be able to edit the buySell tableCell.
Question: How can I embed a choicebox with values buy, sell within the setOnEdit function such that when I double click on the cell, it will give me a choicebox ?
I have my choicebox code below but I have no idea how to combine these things together.
ChoiceBox<BuySell> buySellBox = new ChoiceBox<>();
buySellBox.getItems().addAll("Buy", "Sell");
Update: Problem is still unresolved. However, by following the answer in this post, this is what I have got so far. After creating an object, a table row is created but when I click onto the table cell Buy to edit, nothing happens (I was expecting a drop down choice box to appear and let me re-select my choice).
My table is editable, since I am able to edit tableCell using Volume using the code above.
Added in the images below to show that I am able to edit the Volume tableCell , but not the buySell tableCell, whenever I click on it.
Use a cell factory that creates a ChoiceBox in the cell when editing. see this answer.
Example:
public class Main extends Application {
@Override
public void start(Stage stage) throws Exception {
TableColumn<Item, String> col1 = new TableColumn("Column1");
col1.setCellValueFactory(cellData -> cellData.getValue().nameProperty());
col1.setCellFactory(column -> new TableCel_Edit());
TableColumn<Item, Number> col2 = new TableColumn("Column2");
col2.setCellValueFactory(cellData -> cellData.getValue().valueProperty());
TableView<Item> table = new TableView();
table.setEditable(true);
table.getItems().addAll(loadData());
table.getColumns().addAll(col1, col2);
AnchorPane root = new AnchorPane();
root.getChildren().add(table);
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
}
public static void main(String... args) {
Application.launch(args);
}
private List<Item> loadData() {
List<Item> list = new ArrayList();
for (int i = 0; i < 10; i++) {
Item item = new Item("item" + i, i);
list.add(item);
}
return list;
}
private class TableCel_Edit extends TableCell<Item, String> {
ChoiceBox<String> buySellBox = new ChoiceBox<>();
public TableCel_Edit() {
buySellBox.getItems().addAll("Buy", "Sell");
buySellBox.getSelectionModel().selectedIndexProperty().addListener((obs, oldValue, newValue) -> {
String value = buySellBox.getItems().get(newValue.intValue());
processEdit(value);
});
}
private void processEdit(String value) {
commitEdit(value);
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText(getItem());
setGraphic(null);
}
@Override
public void commitEdit(String value) {
super.commitEdit(value);
// ((Item) this.getTableRow().getItem()).setName(value);
setGraphic(null);
}
@Override
public void startEdit() {
super.startEdit();
String value = getItem();
if (value != null) {
setGraphic(buySellBox);
setText(null);
}
}
@Override
protected void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (item == null || empty) {
setText(null);
} else {
setText(item);
}
}
}
}
Update: in your controller class add the following:
fxTransactionLogBuySell.setCellValueFactory(new PropertyValueFactory<Transaction,String>("buySell"));
fxTransactionLogBuySell.setCellFactory(column -> new TableCel_Edit());
You should also add this class (change Item to Transaction ):
class TableCel_Edit extends TableCell<Item, String> {
....
}
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