JavaFX - 如何使用来自另一个控制器的控制器中的方法?
JavaFX - How to use a method in a controller from another controller?
使用 SceneBuilder。我有 2 个阶段,每个阶段都有一个控制器:
stage1Controller
,
stage2Controller
.
第 1 阶段控制器:
public class Stage1Controller {
@FXML
private MenuItem translate;
@FXML
private Menu file;
@FXML
private Menu edit;
@FXML
private Menu help;
@FXML
private void handleTranslate (ActionEvent event){
translateFirstStage();
//HOW TO ACCESS THE stage2Controller setLabel()??
}
private void translateFirstStage(){
file.setText("Fichier");
edit.setText("Modifier");
help.setText("Aide");
}
}
Stage2控制器:
public class Stage2Controller {
@FXML
private Label lb;
private void setLabel(String string){
lb.setText("string");
}
}
以下是如何使用 2 种方法
(在 Start(Stage primaryStage)
方法中调用)在 Main.java class 中加载两个 fxml 文件:
public void firstStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage1.fxml"));
rootLayout = (BorderPane) loader.load();
// Show the scene containing the root layout.
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void secondStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage2.fxml"));
XD = (AnchorPane) loader.load();
// Show the scene containing the root layout.
Scene scene = new Scene(XD);
Stage stage = new Stage();
stage.setScene(scene);
stage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
handleTranslate(ActionEvent event)
方法在第一个阶段用作 MenuItem translate
的 OnAction
方法,它在两个阶段转换视图。
如何将 setLabel
放入 handleTranslate
方法中?谢谢
"quick and dirty"方法是给Stage1Controller
一个引用Stage2Controller
:
public class Stage1Controller {
private final Stage2Controller stage2Controller ;
public void setStage2Controller(Stage2Controller stage2Controller) {
this.stage2Controller = stage2Controller ;
}
// ...
@FXML
private void handleTranslate (ActionEvent event){
translateFirstStage();
stage2Controller.setLabel(...);
}
// other code as before ...
}
现在在您的主应用程序中:
public class MainApp extends Application {
private Stage1Controller stage1Controller ;
private Stage2Controller stage2Controller ;
@Override
public void start(Stage primaryStage) {
firstStage();
secondStage();
stage1Controller.setStage2Controller(stage2Controller);
// ...
}
public void firstStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage1.fxml"));
rootLayout = (BorderPane) loader.load();
stage1Controller = loader.getController();
// Show the scene containing the root layout.
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void secondStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage2.fxml"));
XD = (AnchorPane) loader.load();
stage2Controller = loader.getController();
// Show the scene containing the root layout.
Scene scene = new Scene(XD);
Stage stage = new Stage();
stage.setScene(scene);
stage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
// ...
}
不过,更稳健的方法是让两个控制器访问共享模型 class,存储数据。如果您使用 JavaFX 可观察属性表示数据,则控制器可以侦听它们关心的属性的变化。例如:
public class Model {
private final StringProperty text = new SimpleStringProperty("Initial text...");
public StringProperty textProperty() {
return text ;
}
public final void setText(String text) {
textProperty().set(text);
}
public final String getText() {
return textProperty().get();
}
// other properties as needed...
}
现在您的控制器将如下所示:
public class Stage1Controller {
private Model model ;
public void setModel(Model model) {
this.model = model ;
}
@FXML
private void handleTranslate (ActionEvent event){
translateFirstStage();
model.setText(...); // value will appear in stage2 controller's label!
}
// ...
}
和
public class Stage2Controller {
@FXML
private Label lb ;
private Model model ;
public void setModel(Model model) {
lb.textProperty().unbind();
this.model = model ;
lb.textProperty().bind(model.textProperty());
}
// ...
}
在这种情况下,您的主应用程序如下所示:
public class MainApp extends Application {
private final Model = new Model();
@Override
public void start(Stage primaryStage) {
// ...
}
public void firstStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage1.fxml"));
rootLayout = (BorderPane) loader.load();
Stage1Controller controller = loader.getController();
controller.setModel(model);
// Show the scene containing the root layout.
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void secondStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage2.fxml"));
XD = (AnchorPane) loader.load();
Stage2Controller controller = loader.getController();
controller.setModel(model);
// Show the scene containing the root layout.
Scene scene = new Scene(XD);
Stage stage = new Stage();
stage.setScene(scene);
stage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
}
使用 SceneBuilder。我有 2 个阶段,每个阶段都有一个控制器:
stage1Controller
,stage2Controller
.
第 1 阶段控制器:
public class Stage1Controller {
@FXML
private MenuItem translate;
@FXML
private Menu file;
@FXML
private Menu edit;
@FXML
private Menu help;
@FXML
private void handleTranslate (ActionEvent event){
translateFirstStage();
//HOW TO ACCESS THE stage2Controller setLabel()??
}
private void translateFirstStage(){
file.setText("Fichier");
edit.setText("Modifier");
help.setText("Aide");
}
}
Stage2控制器:
public class Stage2Controller {
@FXML
private Label lb;
private void setLabel(String string){
lb.setText("string");
}
}
以下是如何使用 2 种方法
(在 Start(Stage primaryStage)
方法中调用)在 Main.java class 中加载两个 fxml 文件:
public void firstStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage1.fxml"));
rootLayout = (BorderPane) loader.load();
// Show the scene containing the root layout.
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void secondStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage2.fxml"));
XD = (AnchorPane) loader.load();
// Show the scene containing the root layout.
Scene scene = new Scene(XD);
Stage stage = new Stage();
stage.setScene(scene);
stage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
handleTranslate(ActionEvent event)
方法在第一个阶段用作MenuItem translate
的OnAction
方法,它在两个阶段转换视图。
如何将 setLabel
放入 handleTranslate
方法中?谢谢
"quick and dirty"方法是给Stage1Controller
一个引用Stage2Controller
:
public class Stage1Controller {
private final Stage2Controller stage2Controller ;
public void setStage2Controller(Stage2Controller stage2Controller) {
this.stage2Controller = stage2Controller ;
}
// ...
@FXML
private void handleTranslate (ActionEvent event){
translateFirstStage();
stage2Controller.setLabel(...);
}
// other code as before ...
}
现在在您的主应用程序中:
public class MainApp extends Application {
private Stage1Controller stage1Controller ;
private Stage2Controller stage2Controller ;
@Override
public void start(Stage primaryStage) {
firstStage();
secondStage();
stage1Controller.setStage2Controller(stage2Controller);
// ...
}
public void firstStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage1.fxml"));
rootLayout = (BorderPane) loader.load();
stage1Controller = loader.getController();
// Show the scene containing the root layout.
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void secondStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage2.fxml"));
XD = (AnchorPane) loader.load();
stage2Controller = loader.getController();
// Show the scene containing the root layout.
Scene scene = new Scene(XD);
Stage stage = new Stage();
stage.setScene(scene);
stage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
// ...
}
不过,更稳健的方法是让两个控制器访问共享模型 class,存储数据。如果您使用 JavaFX 可观察属性表示数据,则控制器可以侦听它们关心的属性的变化。例如:
public class Model {
private final StringProperty text = new SimpleStringProperty("Initial text...");
public StringProperty textProperty() {
return text ;
}
public final void setText(String text) {
textProperty().set(text);
}
public final String getText() {
return textProperty().get();
}
// other properties as needed...
}
现在您的控制器将如下所示:
public class Stage1Controller {
private Model model ;
public void setModel(Model model) {
this.model = model ;
}
@FXML
private void handleTranslate (ActionEvent event){
translateFirstStage();
model.setText(...); // value will appear in stage2 controller's label!
}
// ...
}
和
public class Stage2Controller {
@FXML
private Label lb ;
private Model model ;
public void setModel(Model model) {
lb.textProperty().unbind();
this.model = model ;
lb.textProperty().bind(model.textProperty());
}
// ...
}
在这种情况下,您的主应用程序如下所示:
public class MainApp extends Application {
private final Model = new Model();
@Override
public void start(Stage primaryStage) {
// ...
}
public void firstStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage1.fxml"));
rootLayout = (BorderPane) loader.load();
Stage1Controller controller = loader.getController();
controller.setModel(model);
// Show the scene containing the root layout.
Scene scene = new Scene(rootLayout);
primaryStage.setScene(scene);
primaryStage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
public void secondStage() {
try {
// Load root layout from fxml file.
FXMLLoader loader = new FXMLLoader();
loader.setLocation(Main.class.getResource("view/stage2.fxml"));
XD = (AnchorPane) loader.load();
Stage2Controller controller = loader.getController();
controller.setModel(model);
// Show the scene containing the root layout.
Scene scene = new Scene(XD);
Stage stage = new Stage();
stage.setScene(scene);
stage.show();
} catch (IOException e) {
e.printStackTrace();
}
}
}