javafx
finestre
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Creare una nuova finestra
Per mostrare del contenuto in una nuova finestra, è necessario creare uno Stage . Dopo la creazione e l'inizializzazione show o showAndWait deve essere richiamato sull'oggetto Stage :
// create sample content
Rectangle rect = new Rectangle(100, 100, 200, 300);
Pane root = new Pane(rect);
root.setPrefSize(500, 500);
Parent content = root;
// create scene containing the content
Scene scene = new Scene(content);
Stage window = new Stage();
window.setScene(scene);
// make window visible
window.show();
Nota: questo codice deve essere eseguito sul thread dell'applicazione JavaFX.
Creazione di finestre di dialogo personalizzate
È possibile creare finestre di dialogo personalizzate che contengono molti componenti ed eseguire molte funzionalità su di esso. Si comporta come un secondo stadio sul palco del proprietario.
Nell'esempio seguente viene preparata un'applicazione che mostra la persona nella tabella principale stageview e crea una persona in una finestra di dialogo (AddingPersonDialog). GUI create da SceneBuilder, ma possono essere create con codici java puri.
Applicazione di esempio:
AppMain.java
package customdialog;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class AppMain extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("AppMain.fxml"));
Scene scene = new Scene(root, 500, 500);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
AppMainController.java
package customdialog;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;
public class AppMainController implements Initializable {
@FXML
private TableView<Person> tvData;
@FXML
private TableColumn colId;
@FXML
private TableColumn colName;
@FXML
private TableColumn colAge;
private ObservableList<Person> tvObservableList = FXCollections.observableArrayList();
@FXML
void onOpenDialog(ActionEvent event) throws IOException {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddPersonDialog.fxml"));
Parent parent = fxmlLoader.load();
AddPersonDialogController dialogController = fxmlLoader.<AddPersonDialogController>getController();
dialogController.setAppMainObservableList(tvObservableList);
Scene scene = new Scene(parent, 300, 200);
Stage stage = new Stage();
stage.initModality(Modality.APPLICATION_MODAL);
stage.setScene(scene);
stage.showAndWait();
}
@Override
public void initialize(URL location, ResourceBundle resources) {
colId.setCellValueFactory(new PropertyValueFactory<>("id"));
colName.setCellValueFactory(new PropertyValueFactory<>("name"));
colAge.setCellValueFactory(new PropertyValueFactory<>("age"));
tvData.setItems(tvObservableList);
}
}
AppMain.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>
<AnchorPane maxHeight="400.0" minHeight="400.0" minWidth="500.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AppMainController">
<children>
<VBox alignment="CENTER" layoutX="91.0" layoutY="85.0" spacing="10.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="30.0" AnchorPane.rightAnchor="30.0" AnchorPane.topAnchor="30.0">
<children>
<Button mnemonicParsing="false" onAction="#onOpenDialog" text="Add Person" />
<TableView fx:id="tvData" prefHeight="300.0" prefWidth="400.0">
<columns>
<TableColumn fx:id="colId" prefWidth="75.0" text="ID" />
<TableColumn fx:id="colName" prefWidth="75.0" text="Name" />
<TableColumn fx:id="colAge" prefWidth="75.0" text="Age" />
</columns>
<columnResizePolicy>
<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
</columnResizePolicy>
</TableView>
</children>
</VBox>
</children>
</AnchorPane>
AddPersonDialogController.java
package customdialog;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
public class AddPersonDialogController {
@FXML
private TextField tfId;
@FXML
private TextField tfName;
@FXML
private TextField tfAge;
private ObservableList<Person> appMainObservableList;
@FXML
void btnAddPersonClicked(ActionEvent event) {
System.out.println("btnAddPersonClicked");
int id = Integer.valueOf(tfId.getText().trim());
String name = tfName.getText().trim();
int iAge = Integer.valueOf(tfAge.getText().trim());
Person data = new Person(id, name, iAge);
appMainObservableList.add(data);
closeStage(event);
}
public void setAppMainObservableList(ObservableList<Person> tvObservableList) {
this.appMainObservableList = tvObservableList;
}
private void closeStage(ActionEvent event) {
Node source = (Node) event.getSource();
Stage stage = (Stage) source.getScene().getWindow();
stage.close();
}
}
AddPersonDialog.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>
<AnchorPane minHeight="300.0" minWidth="400.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AddPersonDialogController">
<children>
<VBox alignment="CENTER" layoutX="131.0" layoutY="50.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="5.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="5.0">
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Adding Person Dialog" />
<HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
<children>
<Label alignment="CENTER_RIGHT" minWidth="100.0" text="Id" />
<TextField fx:id="tfId" HBox.hgrow="ALWAYS" />
</children>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
<HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
<children>
<Label alignment="CENTER_RIGHT" minWidth="100.0" text="Name" />
<TextField fx:id="tfName" HBox.hgrow="ALWAYS" />
</children>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
<HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
<children>
<Label alignment="CENTER_RIGHT" minWidth="100.0" text="Age" />
<TextField fx:id="tfAge" HBox.hgrow="ALWAYS" />
</children>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
<HBox alignment="CENTER_RIGHT">
<children>
<Button mnemonicParsing="false" onAction="#btnAddPersonClicked" text="Add" />
</children>
<opaqueInsets>
<Insets />
</opaqueInsets>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
</children>
</VBox>
</children>
</AnchorPane>
Person.java
package customdialog;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
public class Person {
private SimpleIntegerProperty id;
private SimpleStringProperty name;
private SimpleIntegerProperty age;
public Person(int id, String name, int age) {
this.id = new SimpleIntegerProperty(id);
this.name = new SimpleStringProperty(name);
this.age = new SimpleIntegerProperty(age);
}
public int getId() {
return id.get();
}
public void setId(int ID) {
this.id.set(ID);
}
public String getName() {
return name.get();
}
public void setName(String nme) {
this.name.set(nme);
}
public int getAge() {
return age.get();
}
public void setAge(int age) {
this.age.set(age);
}
@Override
public String toString() {
return "id: " + id.get() + " - " + "name: " + name.get()+ "age: "+ age.get();
}
}
Immagine dello schermo 
Creazione di finestre di dialogo personalizzate
È possibile creare finestre di dialogo personalizzate che contengono molti componenti ed eseguire molte funzionalità su di esso. Si comporta come un secondo stadio sul palco del proprietario.
Nell'esempio seguente viene preparata un'applicazione che mostra la persona nella tabella principale stageview e crea una persona in una finestra di dialogo (AddingPersonDialog). GUI create da SceneBuilder, ma possono essere create con codici java puri.
Applicazione di esempio:
AppMain.java
package customdialog;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class AppMain extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("AppMain.fxml"));
Scene scene = new Scene(root, 500, 500);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
AppMainController.java
package customdialog;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.stage.Modality;
import javafx.stage.Stage;
public class AppMainController implements Initializable {
@FXML
private TableView<Person> tvData;
@FXML
private TableColumn colId;
@FXML
private TableColumn colName;
@FXML
private TableColumn colAge;
private ObservableList<Person> tvObservableList = FXCollections.observableArrayList();
@FXML
void onOpenDialog(ActionEvent event) throws IOException {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("AddPersonDialog.fxml"));
Parent parent = fxmlLoader.load();
AddPersonDialogController dialogController = fxmlLoader.<AddPersonDialogController>getController();
dialogController.setAppMainObservableList(tvObservableList);
Scene scene = new Scene(parent, 300, 200);
Stage stage = new Stage();
stage.initModality(Modality.APPLICATION_MODAL);
stage.setScene(scene);
stage.showAndWait();
}
@Override
public void initialize(URL location, ResourceBundle resources) {
colId.setCellValueFactory(new PropertyValueFactory<>("id"));
colName.setCellValueFactory(new PropertyValueFactory<>("name"));
colAge.setCellValueFactory(new PropertyValueFactory<>("age"));
tvData.setItems(tvObservableList);
}
}
AppMain.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.VBox?>
<AnchorPane maxHeight="400.0" minHeight="400.0" minWidth="500.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AppMainController">
<children>
<VBox alignment="CENTER" layoutX="91.0" layoutY="85.0" spacing="10.0" AnchorPane.bottomAnchor="30.0" AnchorPane.leftAnchor="30.0" AnchorPane.rightAnchor="30.0" AnchorPane.topAnchor="30.0">
<children>
<Button mnemonicParsing="false" onAction="#onOpenDialog" text="Add Person" />
<TableView fx:id="tvData" prefHeight="300.0" prefWidth="400.0">
<columns>
<TableColumn fx:id="colId" prefWidth="75.0" text="ID" />
<TableColumn fx:id="colName" prefWidth="75.0" text="Name" />
<TableColumn fx:id="colAge" prefWidth="75.0" text="Age" />
</columns>
<columnResizePolicy>
<TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
</columnResizePolicy>
</TableView>
</children>
</VBox>
</children>
</AnchorPane>
AddPersonDialogController.java
package customdialog;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.Node;
import javafx.scene.control.TextField;
import javafx.stage.Stage;
public class AddPersonDialogController {
@FXML
private TextField tfId;
@FXML
private TextField tfName;
@FXML
private TextField tfAge;
private ObservableList<Person> appMainObservableList;
@FXML
void btnAddPersonClicked(ActionEvent event) {
System.out.println("btnAddPersonClicked");
int id = Integer.valueOf(tfId.getText().trim());
String name = tfName.getText().trim();
int iAge = Integer.valueOf(tfAge.getText().trim());
Person data = new Person(id, name, iAge);
appMainObservableList.add(data);
closeStage(event);
}
public void setAppMainObservableList(ObservableList<Person> tvObservableList) {
this.appMainObservableList = tvObservableList;
}
private void closeStage(ActionEvent event) {
Node source = (Node) event.getSource();
Stage stage = (Stage) source.getScene().getWindow();
stage.close();
}
}
AddPersonDialog.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>
<AnchorPane minHeight="300.0" minWidth="400.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="customdialog.AddPersonDialogController">
<children>
<VBox alignment="CENTER" layoutX="131.0" layoutY="50.0" prefHeight="200.0" prefWidth="100.0" AnchorPane.bottomAnchor="5.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="5.0">
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Adding Person Dialog" />
<HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
<children>
<Label alignment="CENTER_RIGHT" minWidth="100.0" text="Id" />
<TextField fx:id="tfId" HBox.hgrow="ALWAYS" />
</children>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
<HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
<children>
<Label alignment="CENTER_RIGHT" minWidth="100.0" text="Name" />
<TextField fx:id="tfName" HBox.hgrow="ALWAYS" />
</children>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
<HBox alignment="CENTER" prefHeight="50.0" prefWidth="200.0" spacing="10.0">
<children>
<Label alignment="CENTER_RIGHT" minWidth="100.0" text="Age" />
<TextField fx:id="tfAge" HBox.hgrow="ALWAYS" />
</children>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
<HBox alignment="CENTER_RIGHT">
<children>
<Button mnemonicParsing="false" onAction="#btnAddPersonClicked" text="Add" />
</children>
<opaqueInsets>
<Insets />
</opaqueInsets>
<padding>
<Insets right="30.0" />
</padding>
</HBox>
</children>
</VBox>
</children>
</AnchorPane>
Person.java
package customdialog;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
public class Person {
private SimpleIntegerProperty id;
private SimpleStringProperty name;
private SimpleIntegerProperty age;
public Person(int id, String name, int age) {
this.id = new SimpleIntegerProperty(id);
this.name = new SimpleStringProperty(name);
this.age = new SimpleIntegerProperty(age);
}
public int getId() {
return id.get();
}
public void setId(int ID) {
this.id.set(ID);
}
public String getName() {
return name.get();
}
public void setName(String nme) {
this.name.set(nme);
}
public int getAge() {
return age.get();
}
public void setAge(int age) {
this.age.set(age);
}
@Override
public String toString() {
return "id: " + id.get() + " - " + "name: " + name.get()+ "age: "+ age.get();
}
}
Immagine dello schermo
Modified text is an extract of the original Stack Overflow Documentation
Autorizzato sotto CC BY-SA 3.0
Non affiliato con Stack Overflow