Java 如何从一个控制器的标签向另一个控制器的标签发送和应用文本?
我正在用JavaFX和scenebuilder制作一个应用程序 我有两个控制器:控制器和FontControllerJava 如何从一个控制器的标签向另一个控制器的标签发送和应用文本?,java,javafx,scenebuilder,Java,Javafx,Scenebuilder,我正在用JavaFX和scenebuilder制作一个应用程序 我有两个控制器:控制器和FontController public class Main extends Application { public static void main(String[] args) { launch(args); } @Override public void start(Stage primaryStage) throws Exception { try { Parent root = F
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
try {
Parent root = FXMLLoader.load(getClass().getResource("/card/card.fxml"));
Scene scene = new Scene(root, 1600, 600);
primaryStage.setScene(scene);
scene.getStylesheets().add(getClass().getResource("style.css").toExternalForm());
primaryStage.initStyle(StageStyle.UNDECORATED);
primaryStage.setMaximized(true);
primaryStage.setResizable(true);
primaryStage.getIcons().add(new Image("card/resources/logo-icon.png"));
primaryStage.show();
//adding resize and drag primary stage
ResizeHelper.addResizeListener(primaryStage);
//assign ALT+ENTER to maximize window
final KeyCombination kb = new KeyCodeCombination(KeyCode.ENTER, KeyCombination.CONTROL_DOWN);
scene.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if (kb.match(event)) {
primaryStage.setMaximized(!primaryStage.isMaximized());
primaryStage.setResizable(true);
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
我有一个主类,它启动我的程序,并用第一个fontroller控制器打开舞台
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
try {
Parent root = FXMLLoader.load(getClass().getResource("/card/card.fxml"));
Scene scene = new Scene(root, 1600, 600);
primaryStage.setScene(scene);
scene.getStylesheets().add(getClass().getResource("style.css").toExternalForm());
primaryStage.initStyle(StageStyle.UNDECORATED);
primaryStage.setMaximized(true);
primaryStage.setResizable(true);
primaryStage.getIcons().add(new Image("card/resources/logo-icon.png"));
primaryStage.show();
//adding resize and drag primary stage
ResizeHelper.addResizeListener(primaryStage);
//assign ALT+ENTER to maximize window
final KeyCombination kb = new KeyCodeCombination(KeyCode.ENTER, KeyCombination.CONTROL_DOWN);
scene.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if (kb.match(event)) {
primaryStage.setMaximized(!primaryStage.isMaximized());
primaryStage.setResizable(true);
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}
FontCOntroller中有“确定”按钮和标签:
@FXML private Label fontLabel;
@FXML private Button btnFontOk;
请告诉我,当我单击burtton OK以在控制器中添加标签时,我应该如何发送和应用FontController中标签中的文本
找到的解决方案:
我在项目目录中创建了类上下文,以使所有控制器相互通信。您可以添加任意数量的控制器
这里看起来像:
package card;
public class Context {
private final static Context instance = new Context();
public static Context getInstance() {
return instance;
}
private Controller controller;
public void setController(Controller controller) {
this.controller=controller;
}
public Controller getController() {
return controller;
}
private FontController fontController;
public void setFontController(FontController fontController) {
this.fontController=fontController;
}
public FontController getFontController() {
return fontController;
}
}
控制器:
@FXML private Button btnFont;
@FXML private Label category1
@FXML
void changeFont(ActionEvent event) {
try {
FXMLLoader fxmlLoader = new
FXMLLoader(getClass().getResource("font.fxml"));
Parent rootFont = (Parent) fxmlLoader.load();
Stage stage = new Stage();
stage.setTitle("Select Font");
stage.setScene(new Scene(rootFont));
stage.show();
} catch (Exception e) {
System.out.println("can't load new window");
}
}
我在IDEA中创建了我想要更改的标签的getter和setters ALT+Insert
public Label getCategory1() {
return category1;
}
public void setCategory1(Label category1) {
this.category1 = category1;
}
为了通过上下文类获得FontController变量和方法,我放置了一行代码
//getting FontController through Context Class
FontController fontCont = Context.getInstance().getFontController();
我通过我的初始化方法在上下文类中注册了控制器,我的类实现了Initializable
@FXML
public void initialize(URL location, ResourceBundle resources) {
//register Controller in Context Class
Context.getInstance().setController(this);
}
FontController:
@FXML private Button btnFont;
@FXML private Label category1
@FXML
void changeFont(ActionEvent event) {
try {
FXMLLoader fxmlLoader = new
FXMLLoader(getClass().getResource("font.fxml"));
Parent rootFont = (Parent) fxmlLoader.load();
Stage stage = new Stage();
stage.setTitle("Select Font");
stage.setScene(new Scene(rootFont));
stage.show();
} catch (Exception e) {
System.out.println("can't load new window");
}
}
为了获取控制器变量和方法,我放置了以下代码:
//getting Controller variables and methods through Context class
Controller cont = Context.getInstance().getController();
我还通过initialize方法在上下文类中注册了FontController:
@Override
public void initialize(URL location, ResourceBundle resources) {
//register FontController in Context Class
Context.getInstance().setFontController(this);
}
方法,当我单击按钮时,该方法将文本和文本颜色从此FontController中的标签发送到控制器中的标签:
@FXML
void applyFont(ActionEvent event) {
cont.getCategory1().setText(fontLabel.getText());
cont.getCategory1().setTextFill(fontLabel.getTextFill());
}
*通过创建上下文类,可以使控制器相互通信,并在其中创建所需数量的控制器。控制器可以看到彼此的变量和方法由于能够返回结果,因此使用a可能更容易。否则,您必须从控制器实例与FontController实例通信。您可以通过FXMLLoader.getController获取控制器实例。@关闭FontController的此窗口几乎完成。我没有学会如何在JavaFX中使用对话框。我很难在对话框窗口中放置FontSelector、JFOenix颜色选择器和其他东西,所以我决定在FXML中使用其他窗口。我不明白获取FontController实例的代码会是什么样子。你能给我写一个例子,如何将文本从FontController传递到控制器的标签上吗