javafx-2 - TitledPane - 事件

Question

我有两个不同的组件：表格旁边的 TableView 和 TitledPane。我要做的是重新调整表格视图的尺寸，但仅在标题窗格展开或折叠时。当 titledpane 折叠时，tableview 会变大，而当它展开时，tableview 会变小。我不知道我应该采取什么行动。有人知道解决方案吗？

问候

Answer 1

查看下面的示例代码：

import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TitledPane;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.HBox;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class MyDemo extends Application {

    private TableView<Person> tableview = new TableView<Person>();

    // Suppose your preferred height values for those 2 component are as follows:
    private double TABLE_MIN_HEIGHT = 30.0;
    private double TABLE_MAX_HEIGHT = 500.0;
    private double TITLED_PANE_HEIGHT; // will be determined

    private final ObservableList<Person> data =
            FXCollections.observableArrayList(
            new Person("Jacob", "Smith", "jacob.smith@example.com"),
            new Person("Isabella", "Johnson", "isabella.johnson@example.com"),
            new Person("Ethan", "Williams", "ethan.williams@example.com"),
            new Person("Emma", "Jones", "emma.jones@example.com"),
            new Person("Michael", "Brown", "michael.brown@example.com"));

    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void start(Stage stage) {
        TableColumn firstNameCol = new TableColumn("First Name");
        firstNameCol.setMinWidth(100);
        firstNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));

        TableColumn lastNameCol = new TableColumn("Last Name");
        lastNameCol.setMinWidth(100);
        lastNameCol.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));

        TableColumn emailCol = new TableColumn("Email");
        emailCol.setMinWidth(200);
        emailCol.setCellValueFactory(new PropertyValueFactory<Person, String>("email"));

        tableview.setItems(data);
        tableview.getColumns().addAll(firstNameCol, lastNameCol, emailCol);

        final TitledPane titledPane = new TitledPane("TitledPane", new Text("Content\n\n\n\n"));
        titledPane.setAnimated(false); // we need to temporarily disable
        // animation to get the titledpanes computed height correctly.

        // Force to min height of table view
        tableview.setMaxHeight(TABLE_MIN_HEIGHT);
        tableview.setMinHeight(TABLE_MIN_HEIGHT);

        // Here you have 2 options
        int option = 2;

        if (option == 1) {
            // 1st simply force the table view height to its preferred max value
            // when the titled pane's expanded property changed:
            titledPane.expandedProperty().addListener(new ChangeListener<Boolean>() {
                @Override
                public void changed(ObservableValue<? extends Boolean> observable, Boolean oldValue, Boolean newValue) {
                    tableview.setMaxHeight(newValue ? TABLE_MIN_HEIGHT : TABLE_MAX_HEIGHT);
                    tableview.setMinHeight(newValue ? TABLE_MIN_HEIGHT : TABLE_MAX_HEIGHT);
                }
            });
        } else if (option == 2) {
            // 2nd. Similar to first but with "animation". Here observe height changes of titled pane:
            titledPane.heightProperty().addListener(new ChangeListener<Number>() {
                @Override
                public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
                    tableview.setMaxHeight(TABLE_MAX_HEIGHT - (TABLE_MAX_HEIGHT * (newValue.doubleValue() / TITLED_PANE_HEIGHT)));
                    tableview.setMinHeight(TABLE_MAX_HEIGHT - (TABLE_MAX_HEIGHT * (newValue.doubleValue() / TITLED_PANE_HEIGHT)));
                }
            });
        }

        HBox hBox = new HBox(10);
        hBox.getChildren().addAll(tableview, titledPane);

        Scene scene = new Scene(hBox);
        stage.setTitle("Table View Sample");
        stage.setWidth(650);
        stage.setHeight(700);
        stage.setScene(scene);

        TITLED_PANE_HEIGHT = titledPane.getHeight();
        System.out.println("TITLED_PANE_HEIGHT = " + TITLED_PANE_HEIGHT);

        stage.show();

        // Determine the titledPane computed height value after stage has been shown.
        TITLED_PANE_HEIGHT = titledPane.getHeight();
        System.out.println("TITLED_PANE_HEIGHT = " + TITLED_PANE_HEIGHT);
        // .. then enable animation
        titledPane.setAnimated(true);
    }

    public static class Person {

        private final SimpleStringProperty firstName;
        private final SimpleStringProperty lastName;
        private final SimpleStringProperty email;

        private Person(String fName, String lName, String email) {
            this.firstName = new SimpleStringProperty(fName);
            this.lastName = new SimpleStringProperty(lName);
            this.email = new SimpleStringProperty(email);
        }

        public String getFirstName() {
            return firstName.get();
        }

        public void setFirstName(String fName) {
            firstName.set(fName);
        }

        public String getLastName() {
            return lastName.get();
        }

        public void setLastName(String fName) {
            lastName.set(fName);
        }

        public String getEmail() {
            return email.get();
        }

        public void setEmail(String fName) {
            email.set(fName);
        }
    }
}

它是演示，根据您的需要进行改进。也许还有其他方法。HTH。