使用按钮向javafx tableview添加新行

我在fxml中定义了一个tableview。 它类似于以下内容：

SNO Name DOB Action 

“操作”列将在每行中包含带有文本“删除”的按钮。 我有两个问题：

1. 如何在javafx中的每个新行最后一个单元格中添加此删除按钮？
2. 如何获取单击删除按钮的行的索引？（这样我可以删除行或执行其他事件处理工作）

Answer 1

我认为这个示例用于您的项目只需通过它并在您的项目中实现.cack checkboxdemo;

 import javafx.application.Application; import javafx.beans.value.ChangeListener; import javafx.beans.value.ObservableValue; import javafx.scene.Scene; import javafx.scene.control.CheckBox; import javafx.scene.control.TableColumn; import javafx.scene.control.TableView; import javafx.scene.layout.StackPane; import javafx.scene.layout.VBox; import javafx.stage.Stage; /** * * @author reegan */ public class Checkboxdemo extends Application { static int i = 0; @Override public void start(Stage primaryStage) { CheckBox checkBox = new CheckBox(); checkBox.selectedProperty().addListener(new ChangeListener() { public void changed(ObservableValue ov, Boolean old_val, Boolean new_val) { if (ov.getValue() == true) { i = i + 1; System.out.println(i); } } }); TableView tableView = new TableView(); TableColumn column = new TableColumn("check"); TableColumn column1 = new TableColumn("Name"); tableView.getColumns().addAll(column,column1); VBox root = new VBox(); root.getChildren().addAll(checkBox,tableView); Scene scene = new Scene(root, 300, 250); primaryStage.setTitle("Hello World!"); primaryStage.setScene(scene); primaryStage.show(); } /** * The main() method is ignored in correctly deployed JavaFX application. * main() serves only as fallback in case the application can not be * launched through deployment artifacts, eg, in IDEs with limited FX * support. NetBeans ignores main(). * * @param args the command line arguments */ // public static void main(String[] args) { // launch(args); // } } 

 package checkboxdemo; import javafx.beans.property.SimpleStringProperty; import javafx.beans.property.StringProperty; public class Person { private StringProperty firstName; private StringProperty lastName; public Person(String firstName, String lastName) { setFirstName(firstName); setLastName(lastName); } public final void setFirstName(String value) { firstNameProperty().set(value); } public final void setLastName(String value) { lastNameProperty().set(value); } public String getFirstName() { return firstNameProperty().get(); } public String getLastName() { return lastNameProperty().get(); } public StringProperty firstNameProperty() { if (firstName == null) firstName = new SimpleStringProperty(this, "firstName"); return firstName; } public StringProperty lastNameProperty() { if (lastName == null) lastName = new SimpleStringProperty(this, "lastName"); return lastName; } } 

并在TableView中添加单元格中的按钮

 package checkboxdemo; import javafx.application.Application; import javafx.beans.property.*; import javafx.beans.value.ObservableValue; import javafx.collections.FXCollections; import javafx.event.*; import javafx.geometry.*; import javafx.scene.Scene; import javafx.scene.control.*; import javafx.scene.control.cell.PropertyValueFactory; import javafx.scene.image.Image; import javafx.scene.input.MouseEvent; import javafx.scene.layout.*; import javafx.stage.*; import javafx.util.Callback; public class TableViewWithAddButtonExample extends Application { public static void main(String[] args) { launch(args); } @Override public void start(final Stage stage) { stage.setTitle("People"); // stage.getIcons().add(new Image("http://sofzh.miximages.com/java/Historical-Viking-Female-icon.png")); // icon license: Linkware (Backlink to http://www.icons-land.com required) // create a table. final TableView table = new TableView<>( FXCollections.observableArrayList( new Person("Jacob", "Smith"), new Person("Isabella", "Johnson"), new Person("Ethan", "Williams"), new Person("Emma", "Jones"), new Person("Michael", "Brown") ) ); // define the table columns. TableColumn firstNameCol = new TableColumn<>("First Name"); firstNameCol.setCellValueFactory(new PropertyValueFactory("firstName")); TableColumn lastNameCol = new TableColumn<>("Last Name"); lastNameCol.setCellValueFactory(new PropertyValueFactory("lastName")); TableColumn actionCol = new TableColumn<>("Action"); actionCol.setSortable(false); // define a simple boolean cell value for the action column so that the column will only be shown for non-empty rows. actionCol.setCellValueFactory(new Callback, ObservableValue>() { @Override public ObservableValue call(TableColumn.CellDataFeatures features) { return new SimpleBooleanProperty(features.getValue() != null); } }); // create a cell value factory with an add button for each row in the table. actionCol.setCellFactory(new Callback, TableCell>() { @Override public TableCell call(TableColumn personBooleanTableColumn) { return new AddPersonCell(stage, table); } }); table.getColumns().setAll(firstNameCol, lastNameCol, actionCol); table.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY); stage.setScene(new Scene(table)); stage.show(); } /** A table cell containing a button for adding a new person. */ private class AddPersonCell extends TableCell { // a button for adding a new person. final Button addButton = new Button("Add"); // pads and centers the add button in the cell. final StackPane paddedButton = new StackPane(); // records the y pos of the last button press so that the add person dialog can be shown next to the cell. final DoubleProperty buttonY = new SimpleDoubleProperty(); /** * AddPersonCell constructor * @param stage the stage in which the table is placed. * @param table the table to which a new person can be added. */ AddPersonCell(final Stage stage, final TableView table) { paddedButton.setPadding(new Insets(3)); paddedButton.getChildren().add(addButton); addButton.setOnMousePressed(new EventHandler() { @Override public void handle(MouseEvent mouseEvent) { buttonY.set(mouseEvent.getScreenY()); } }); addButton.setOnAction(new EventHandler() { @Override public void handle(ActionEvent actionEvent) { showAddPersonDialog(stage, table, buttonY.get()); table.getSelectionModel().select(getTableRow().getIndex()); } }); } /** places an add button in the row only if the row is not empty. */ @Override protected void updateItem(Boolean item, boolean empty) { super.updateItem(item, empty); if (!empty) { setContentDisplay(ContentDisplay.GRAPHIC_ONLY); setGraphic(paddedButton); } } } /** * shows a dialog which displays a UI for adding a person to a table. * @param parent a parent stage to which this dialog will be modal and placed next to. * @param table the table to which a person is to be added. * @param y the y position of the top left corner of the dialog. */ private void showAddPersonDialog(Stage parent, final TableView table, double y) { // initialize the dialog. final Stage dialog = new Stage(); dialog.setTitle("New Person"); dialog.initOwner(parent); dialog.initModality(Modality.WINDOW_MODAL); dialog.initStyle(StageStyle.UTILITY); dialog.setX(parent.getX() + parent.getWidth()); dialog.setY(y); // create a grid for the data entry. GridPane grid = new GridPane(); final TextField firstNameField = new TextField(); final TextField lastNameField = new TextField(); grid.addRow(0, new Label("First Name"), firstNameField); grid.addRow(1, new Label("Last Name"), lastNameField); grid.setHgap(10); grid.setVgap(10); GridPane.setHgrow(firstNameField, Priority.ALWAYS); GridPane.setHgrow(lastNameField, Priority.ALWAYS); // create action buttons for the dialog. Button ok = new Button("OK"); ok.setDefaultButton(true); Button cancel = new Button("Cancel"); cancel.setCancelButton(true); // only enable the ok button when there has been some text entered. ok.disableProperty().bind(firstNameField.textProperty().isEqualTo("").or(lastNameField.textProperty().isEqualTo(""))); // add action handlers for the dialog buttons. ok.setOnAction(new EventHandler() { @Override public void handle(ActionEvent actionEvent) { int nextIndex = table.getSelectionModel().getSelectedIndex() + 1; table.getItems().add(nextIndex, new Person(firstNameField.getText(), lastNameField.getText())); table.getSelectionModel().select(nextIndex); dialog.close(); } }); cancel.setOnAction(new EventHandler() { @Override public void handle(ActionEvent actionEvent) { dialog.close(); } }); // layout the dialog. HBox buttons = HBoxBuilder.create().spacing(10).children(ok, cancel).alignment(Pos.CENTER_RIGHT).build(); VBox layout = new VBox(10); layout.getChildren().addAll(grid, buttons); layout.setPadding(new Insets(5)); dialog.setScene(new Scene(layout)); dialog.show(); } }