这是一个单击行的JavaFX表的基本示例：
public class MainApp extends Application
{
private TableView<Person> table = new TableView<>();
private final ObservableList<Person> data
= FXCollections.observableArrayList(
new Person("Processor", "72"),
new Person("RAM", "78"),
new Person("HDD Free Space", "890"),
new Person("Lan Adapter NIC 1", "36"),
new Person("Lan Adapter NIC 2", "67"));
public static void main(String[] args)
{
launch(args);
}
@Override
public void start(Stage stage)
{
//Scene scene = new Scene(new Group());
stage.setTitle("Table View Sample");
//stage.setWidth(850);
//stage.setHeight(550);
final Label label = new Label("Address Book");
label.setFont(new Font("Arial", 20));
//table.setStyle("-fx-font-size: 11;"); // Set table font size
table.setEditable(false);
Callback<TableColumn<Person, String>, TableCell<Person, String>> cellFactory = new Callback<TableColumn<Person, String>, TableCell<Person, String>>()
{
@Override
public TableCell<Person, String> call(TableColumn<Person, String> col)
{
TableCell<Person, String> cell = new EditingCell();
cell.addEventFilter(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>()
{
@Override
public void handle(MouseEvent event)
{
if (event.getClickCount() > 1)
{
System.out.println("double clicked!");
// TODO GET THE OBJECT AND MAKE SQL QUERY IN ORDER TO MAKE NEW DIALOG WITH
TableCell c = (TableCell) event.getSource();
System.out.println("Cell text: " + c.getText());
}
}
});
return cell;
}
};
table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
TableColumn firstNameCol = new TableColumn("Credentials");
//firstNameCol.setPrefWidth(300);
firstNameCol.setMinWidth(20);
//firstNameCol.prefWidthProperty().bind(table.widthProperty().divide(2)); // w * 1/2
firstNameCol.setCellValueFactory(new PropertyValueFactory<>("firstName"));
firstNameCol.setCellFactory(cellFactory);
firstNameCol.setOnEditCommit(
new EventHandler<CellEditEvent<Person, String>>()
{
@Override
public void handle(CellEditEvent<Person, String> t)
{
((Person) t.getTableView().getItems().get(
t.getTablePosition().getRow())).setFirstName(t.getNewValue());
}
}
);
TableColumn lastNameCol = new TableColumn("Value");
//lastNameCol.setPrefWidth(300);
lastNameCol.setMinWidth(20);
//lastNameCol.prefWidthProperty().bind(table.widthProperty().divide(2)); // w * 1/2
lastNameCol.setCellValueFactory(new PropertyValueFactory<>("lastName"));
lastNameCol.setCellFactory(cellFactory);
lastNameCol.setOnEditCommit(
new EventHandler<CellEditEvent<Person, String>>()
{
@Override
public void handle(CellEditEvent<Person, String> t)
{
((Person) t.getTableView().getItems().get(
t.getTablePosition().getRow())).setLastName(t.getNewValue());
}
}
);
table.setItems(data);
table.getColumns().addAll(firstNameCol, lastNameCol);
VBox vbox = new VBox();
VBox.setVgrow(table, Priority.ALWAYS);
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 10, 10, 10));
vbox.getChildren().addAll(label, table);
Scene scene = new Scene(vbox);
stage.setScene(scene);
stage.show();
}
public static class Person
{
private final SimpleStringProperty firstName;
private final SimpleStringProperty lastName;
private Person(String fName, String lName)
{
this.firstName = new SimpleStringProperty(fName);
this.lastName = new SimpleStringProperty(lName);
}
public String getFirstName()
{
return firstName.get();
}
public void setFirstName(String fName)
{
firstName.set(fName);
}
public String getLastName()
{
return lastName.get();
}
public void setLastName(String fName)
{
lastName.set(fName);
}
}
class EditingCell extends TableCell<Person, String>
{
private TextField textField;
public EditingCell()
{
// Right-Click mouse context menu
final ContextMenu contextMenu = new ContextMenu();
contextMenu.setOnShowing(
new EventHandler<WindowEvent>()
{
@Override
public void handle(WindowEvent e)
{
System.out.println("showing");
}
}
);
contextMenu.setOnShown(new EventHandler<WindowEvent>()
{
@Override
public void handle(WindowEvent e)
{
System.out.println("shown");
}
});
MenuItem item1 = new MenuItem("About");
item1.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("About");
}
});
MenuItem item2 = new MenuItem("Preferences");
item2.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
System.out.println("Preferences");
}
});
MenuItem item3 = new MenuItem("Delete row");
item3.setOnAction(new EventHandler<ActionEvent>()
{
@Override
public void handle(ActionEvent e)
{
// TODO - send SQL query from this code
getTableView().getItems().remove(getIndex());
System.out.println("Delete row");
}
});
contextMenu.getItems().addAll(item1, item2, item3);
setContextMenu(contextMenu);
}
@Override
public void startEdit()
{
if (!isEmpty())
{
super.startEdit();
createTextField();
setText(null);
setGraphic(textField);
textField.selectAll();
}
}
@Override
public void cancelEdit()
{
super.cancelEdit();
setText((String) getItem());
setGraphic(null);
}
@Override
public void updateItem(String item, boolean empty)
{
super.updateItem(item, empty);
if (empty)
{
setText(null);
setGraphic(null);
}
else
{
if (isEditing())
{
if (textField != null)
{
textField.setText(getString());
}
setText(null);
setGraphic(textField);
}
else
{
setText(getString());
setGraphic(null);
}
}
}
private void createTextField()
{
textField = new TextField(getString());
textField.setMinWidth(this.getWidth() - this.getGraphicTextGap() * 2);
textField.focusedProperty().addListener(new ChangeListener<Boolean>()
{
@Override
public void changed(ObservableValue<? extends Boolean> arg0,
Boolean arg1, Boolean arg2)
{
if (!arg2)
{
commitEdit(textField.getText());
}
}
});
}
private String getString()
{
return getItem() == null ? "" : getItem().toString();
}
}
}
当我双击表格行时，我无法打印任何内容。你能帮我解决这个问题吗？
答案 0 :(得分：3)
只需将eventFilter添加到EditingCell并将其返回：
Callback<TableColumn<Person, String>, TableCell<Person, String>> cellFactory = new Callback<TableColumn<Person, String>, TableCell<Person, String>>() {
@Override
public TableCell<Person, String> call(TableColumn<Person, String> col) {
TableCell<Person, String> cell = new EditingCell();
cell.addEventFilter(...); // same code as you have in the question
return cell ;
}
});
也可以在EditingCell的构造函数中添加EventFilter，但这种方法可能更清晰。
答案 1 :(得分：2)
嗯，你回来了错误的单元格
cell.addEventFilter(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
if (event.getClickCount() > 1) {
System.out.println("double clicked!");
// TODO GET THE OBJECT AND MAKE SQL QUERY IN ORDER TO MAKE NEW DIALOG WITH
TableCell c = (TableCell) event.getSource();
System.out.println("Cell text: " + c.getText());
}
}
});
**return new EditingCell(); // replace this with return cell;**
}
};