JavaFX GridPane适合ScrollPane，它不使用BorderPane的所有可用空间

Question

我有一个类似于下面用fxml代码显示的场景（用SceneBuilder制作）：

sample.fxml

    <?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<BorderPane fx:id="bpMain" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="600.0" minWidth="800.0" prefHeight="600.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
    <center>
        <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
            <children>
                <HBox AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
                    <children>
                        <VBox prefHeight="200.0" prefWidth="100.0">
                            <children>
                                <BorderPane>
                                    <padding>
                                        <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
                                    </padding>
                                </BorderPane>
                                <BorderPane layoutX="10.0" layoutY="10.0" prefHeight="200.0" prefWidth="200.0">
                                    <padding>
                                        <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
                                    </padding>
                                    <top>
                                        <Label text="List 1:" BorderPane.alignment="CENTER">
                                            <BorderPane.margin>
                                                <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
                                            </BorderPane.margin>
                                        </Label>
                                    </top>
                                    <center>
                                        <ListView minHeight="500.0" minWidth="-Infinity" prefHeight="500.0" prefWidth="200.0" BorderPane.alignment="CENTER">
                                            <padding>
                                                <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
                                            </padding>
                                        </ListView>
                                    </center>
                                </BorderPane>
                            </children>
                        </VBox>
                        <BorderPane prefHeight="200.0" prefWidth="200.0" HBox.hgrow="ALWAYS">
                            <right>
                                <VBox minWidth="100.0" BorderPane.alignment="CENTER">
                                    <children>
                                        <BorderPane>
                                            <center>
                                                <ListView minWidth="150.0" prefHeight="500.0" prefWidth="200.0" BorderPane.alignment="CENTER">
                                                    <BorderPane.margin>
                                                        <Insets top="10.0" />
                                                    </BorderPane.margin>
                                                </ListView>
                                            </center>
                                            <VBox.margin>
                                                <Insets bottom="10.0" top="10.0" />
                                            </VBox.margin>
                                            <top>
                                                <VBox alignment="CENTER" BorderPane.alignment="CENTER">
                                                    <children>
                                                        <Label text="List2:" />
                                                    </children>
                                                </VBox>
                                            </top>
                                        </BorderPane>
                                    </children>
                                </VBox>
                            </right>
                            <center>
                                <BorderPane prefHeight="200.0" prefWidth="200.0" BorderPane.alignment="CENTER">
                                    <top>
                                        <Label text="Label" BorderPane.alignment="CENTER">
                                            <BorderPane.margin>
                                                <Insets bottom="15.0" left="5.0" right="5.0" top="5.0" />
                                            </BorderPane.margin>
                                        </Label>
                                    </top>
                                    <padding>
                                        <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
                                    </padding>
                                    <center>
                                        <BorderPane fx:id="matrixBorderPane" prefHeight="200.0" prefWidth="200.0" BorderPane.alignment="CENTER" />
                                    </center>
                                    <bottom>
                                        <VBox alignment="CENTER" spacing="10.0" BorderPane.alignment="CENTER">
                                            <children>
                                                <HBox alignment="CENTER" spacing="10.0">
                                                    <children>
                                                        <Button fx:id="button5" mnemonicParsing="false" onAction="#show5matrix" text="5" />
                                          <Button fx:id="button15" layoutX="171.0" layoutY="10.0" mnemonicParsing="false" onAction="#show15matrix" text="15" />
                                                    </children>
                                                </HBox>
                                            </children>
                                        </VBox>
                                    </bottom>
                                </BorderPane>
                            </center>
                        </BorderPane>
                    </children>
                </HBox>
            </children>
        </AnchorPane>
    </center>
</BorderPane>

我想在matrixBorderPane中添加一个矩阵，TextFields代表GridPane。当矩阵很小时，下面添加的代码对我来说是完美的（在点击Button的{​​{1}}时看到它），但是尺寸更大的值并非全部可见（5 {{1 }}）：

Button

15

Main.java

package sample;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws IOException {

        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        Scene scene = new Scene(root);
        primaryStage.setTitle("Matrix");
        primaryStage.setScene(scene);
        primaryStage.setMinHeight(750);
        primaryStage.setMinWidth(550);
        primaryStage.show();
    }



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

因此，我向Controller.java添加了package sample; import javafx.beans.binding.Bindings; import javafx.event.ActionEvent; import javafx.fxml.FXML; import javafx.fxml.Initializable; import javafx.geometry.Pos; import javafx.scene.control.Button; import javafx.scene.control.ScrollPane; import javafx.scene.control.TextField; import javafx.scene.layout.BorderPane; import javafx.scene.layout.GridPane; import javafx.scene.layout.Region; import javafx.scene.layout.StackPane; import java.net.URL; import java.util.ResourceBundle; public class Controller implements Initializable { @FXML public BorderPane matrixBorderPane; @FXML public Button button5; @FXML public Button button15; private ScrollPane scrollPane = new ScrollPane(); //////////////////////////////////////////////// @FXML public void show5matrix(ActionEvent e){ showMatrix(5); } @FXML public void show15matrix(ActionEvent e) { showMatrix(15); } @Override public void initialize(URL location, ResourceBundle resources) { } private void showMatrix(int size) { GridPane matrixGrid = new GridPane(); StackPane gridHolder = new StackPane(matrixGrid); scrollPane.setContent(gridHolder); matrixGrid.setMinHeight(30*size); matrixGrid.setMinWidth(30*size); matrixGrid.setMaxHeight(30*size); matrixGrid.setMaxWidth(50*size); for (int i = 0; i < size; i++) { for (int j = 0; j < size; j++) { TextField tf = new TextField(); Double value = 1.22; tf.setText(value.toString()); tf.setAlignment(Pos.CENTER); tf.setEditable(true); tf.setPrefHeight(Region.USE_COMPUTED_SIZE); tf.setPrefWidth(Region.USE_COMPUTED_SIZE); GridPane.setRowIndex(tf, i); GridPane.setColumnIndex(tf, j); matrixGrid.getChildren().add(tf); } } //gridHolder.minWidthProperty().bind(Bindings.createDoubleBinding(() -> //scrollPane.getViewportBounds().getWidth(), scrollPane.viewportBoundsProperty())); //gridHolder.minHeightProperty().bind(Bindings.createDoubleBinding(() -> //scrollPane.getViewportBounds().getHeight(), scrollPane.viewportBoundsProperty())); //matrixBorderPane.setCenter(scrollPane); matrixBorderPane.setCenter(matrixGrid); //to comment } } ，然后我的scrollPane matrixBorderPane被放置在GridPane中。我在这里阅读：How to center the content of a javafx 8 scrollpane matrixGrid在将它放在中心位置时可能会有所帮助，但它并不像我需要的那样对我有效。

您可以通过取消注释评论行并评论scrollPane类中标记为StackPane的行来查看更改结果。

我想要的是，只有当矩阵太大而不适合//to comment的尺寸时才能激活Controller.java，如果确实如此，我希望将它放在{scrollPane的正中心{1}}。

所以我只希望我的matrixBorderPane位于matrixBorderPane并且始终位于matrixGrid的中心，无论矩阵有多大，但是如果它＆＃ 39;太大了，让scrollPane做它的工作。因此，当矩阵较小时，我希望它看起来与运行具有三条注释行的代码完全相同，并且当矩阵很大但在matrixBorderPane内时单击scrollPane（相同代码）后看起来像。