我已将我的应用程序从 JavaFX8 升级到 JavaFX11（带有 OpenJFX 的 OpenJDK），并尝试使用键盘TableCells在TableView.
在 JavaFX8 中，我曾经setOnKeyPressed捕获和处理键特殊键，例如。TAB 移动到下一个右侧单元格，SHIFT+TAB 移动到上一个左侧单元格。那工作得很好。
但是，当在 JavaFX11 中运行相同的代码时，TAB 会将焦点从 移动TableView到屏幕上的其他控件，而 SHIFT+TAB 的作用相同，但控制顺序相反。就好像 JavaFX11 正在恢复 TAB 和 SHIFT+TAB 的默认行为并忽略setOnKeyPressed.
为什么会这样？JavaFX8 和 JavaFX11 之间的键盘导航有什么改变吗？我在我的代码中做错了吗？
我修改了 JavaFX11 代码以注册和使用EventHandler而不是setOnKeyPressed. 然后键盘导航就像在 JavaFX8 中一样工作。但是，新EventHandler的干扰了EventHandler我的应用程序中的其他 s，我真的很希望能够使用setOnKeyPressed.
我一直在谷歌搜索，但到目前为止只找到一个参考，至少其中一部分看起来像同一个问题： JavaFX 11 TableView Cell navigation by TAB key press without custom editableCell class。其他参考适用于 JavaFX8 或更早版本。
这是一个演示该问题的 MVCE。相同的代码在 JavaFX8 和 JavaFX11 中运行。您可以在不进行事件处理的情况下运行它来查看默认行为，或者使用其中一个setOnKeyPressed或EventHandler来查看使用 TAB 和 SHIFT+TAB 时的行为差异。
我正在使用 jdk1.8.0_202 和 11.0.2 版本的 OpenJDK 和 OpenJFX，它们都在 Windows 7 上的 Netbeans 10.0 中运行。
package test009;
import java.util.Arrays;
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TablePosition;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.TextFieldTableCell;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyCodeCombination;
import javafx.scene.input.KeyCombination;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import javafx.util.converter.DefaultStringConverter;
public class Test009 extends Application {
private EventHandler<KeyEvent> keyEditingHandler;
private ObservableList<DataModel> ol = FXCollections.observableArrayList();
private TableView<DataModel> tv = new TableView();
private Parent createContent() {
loadDummyData();
createTableColumns();
tv.getSelectionModel().setCellSelectionEnabled(true);
tv.setEditable(true);
tv.setItems(ol);
//******************************************************************************************
//JavaFX8 code that doesn't appear to work in JavaFX11
/*
tv.setOnKeyPressed(event -> {
doTheKeyEvent(event);
});
*/
//******************************************************************************************
//Code needed to achieve the same end in JavaFX11
/*
registerKeyEventHandler();
addKeyEditingHandler();
*/
BorderPane content = new BorderPane();
content.setCenter(tv);
HBox hb = new HBox();
hb.setPadding(new Insets(10D));
hb.setSpacing(10D);
hb.setAlignment(Pos.CENTER);
Button btn1 = new Button("any old object");
Button btn2 = new Button("another object");
hb.getChildren().addAll(Arrays.asList(btn1, btn2));
content.setTop(hb);
return content;
}
public void registerKeyEventHandler() {
keyEditingHandler = (KeyEvent event) -> {
doTheKeyEvent(event);
};
}
private <S> void doTheKeyEvent(KeyEvent event) {
final KeyCombination shiftTAB = new KeyCodeCombination(KeyCode.TAB, KeyCombination.SHIFT_DOWN);
@SuppressWarnings("unchecked") TablePosition<DataModel, ?> pos = tv.getFocusModel().getFocusedCell();
if ( shiftTAB.match(event) ) {
tv.getSelectionModel().selectLeftCell();
event.consume();
} else if ( event.getCode() == KeyCode.TAB ) {
tv.getSelectionModel().selectRightCell();
event.consume();
//... test for other keys and key combinations
//... otherwise fall through to edit the TableCell
} else if ( ! event.isControlDown() && ! event.isAltDown() ){
tv.edit(pos.getRow(), tv.getVisibleLeafColumn(pos.getColumn()));
}
}
public void addKeyEditingHandler() {
tv.addEventFilter(KeyEvent.KEY_PRESSED, keyEditingHandler);
}
private void createTableColumns() {
TableColumn<DataModel,String> col1 = new TableColumn<>("field1");
TableColumn<DataModel,String> col2 = new TableColumn<>("field2");
TableColumn<DataModel,String> col3 = new TableColumn<>("field3");
TableColumn<DataModel,String> col4 = new TableColumn<>("field4");
TableColumn<DataModel,String> col5 = new TableColumn<>("field5");
col1.setCellValueFactory(cellData -> cellData.getValue().field1Property());
col1.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
col2.setCellValueFactory(cellData -> cellData.getValue().field2Property());
col2.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
col3.setCellValueFactory(cellData -> cellData.getValue().field3Property());
col3.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
col4.setCellValueFactory(cellData -> cellData.getValue().field4Property());
col4.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
col5.setCellValueFactory(cellData -> cellData.getValue().field5Property());
col5.setCellFactory(TextFieldTableCell.<DataModel, String>forTableColumn(new DefaultStringConverter()));
tv.getColumns().addAll(Arrays.asList(col1, col2, col3, col4, col5));
}
private void loadDummyData() {
ol.add(new DataModel("1", "a", "x", "y", "z"));
ol.add(new DataModel("2", "a", "x", "y", "z"));
ol.add(new DataModel("3", "a", "x", "y", "z"));
ol.add(new DataModel("4", "a", "x", "y", "z"));
ol.add(new DataModel("5", "a", "x", "y", "z"));
}
private class DataModel {
private final StringProperty field1;
private final StringProperty field2;
private final StringProperty field3;
private final StringProperty field4;
private final StringProperty field5;
public DataModel(
String field1,
String field2,
String field3,
String field4,
String field5
) {
this.field1 = new SimpleStringProperty(field1);
this.field2 = new SimpleStringProperty(field2);
this.field3 = new SimpleStringProperty(field3);
this.field4 = new SimpleStringProperty(field4);
this.field5 = new SimpleStringProperty(field5);
}
public String getField1() {return field1.get().trim();}
public void setField1(String field1) {this.field1.set(field1);}
public StringProperty field1Property() {return field1;}
public String getField2() {return field2.get().trim();}
public void setField2(String field2) {this.field2.set(field2);}
public StringProperty field2Property() {return field2;}
public String getField3() {return field3.get().trim();}
public void setField3(String field3) {this.field3.set(field3);}
public StringProperty field3Property() {return field3;}
public String getField4() {return field4.get().trim();}
public void setField4(String field4) {this.field4.set(field4);}
public StringProperty field4Property() {return field4;}
public String getField5() {return field5.get().trim();}
public void setField5(String field5) {this.field5.set(field5);}
public StringProperty field5Property() {return field5;}
}
@Override
public void start(Stage stage) throws Exception {
stage.setScene(new Scene(createContent()));
stage.setTitle("JavaFX11 - TableView keyboard navigation");
stage.setWidth(600D);
stage.setHeight(600D);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}