BorderPane重叠内容

Question

我有孩子GridPane，我想如果文本会增加，那么文本应该 不是从gridPane中移出，而是从ScrollPane中移出，我不想看到框外的Apple文本。

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

    String border = "-fx-border-color:red;";

    Text title=new Text("Machin");

    GridPane topLeft=new GridPane();
    topLeft.setMinSize(80, 5);
    topLeft.setMaxSize(80, 80);

    topLeft.setStyle(border);

    topLeft.add(title, 0, 0);

    for(int i=1;i<=15;i++) {
        topLeft.add(new Text("Apple"), 0,i);
    }


    GridPane root = new GridPane();
    root.setAlignment(Pos.CENTER);

    root.setHgap(20);
    root.setVgap(20);

    root.add(topLeft, 0, 0);



    BorderPane borderPane = new BorderPane();
    borderPane.setTop(new Label("Header"));
    borderPane.setCenter(root);
    borderPane.setBottom(new Label("Buttom"));


    primaryStage.setScene(new Scene(borderPane, 600, 400));
    primaryStage.show();
}

图片：

Answer 1

除了使用GridPane或ListView之类的更复杂的控件来包围内容之外，您还可以使用TableView之类的布局窗格。这些控件具有内置的滚动条，这些滚动条将在控件的内容大于可见区域时显示。查看链接的教程，以评估那些其他控件是否适用于您的应用程序。

如果您希望保留GridPane，则可以将GridPane包装在ScrollPane中，以使GridPane的内容在到达时滚动一定的大小，例如下面的示例：

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class ScrollingGrid extends Application {
    @Override
    public void start(Stage primaryStage) throws Exception {
        String border = "-fx-border-color:red;";
        Text title = new Text("Machin");

        GridPane appleGrid = new GridPane();
        appleGrid.setMinSize(80, 5);
        appleGrid.setStyle(border);
        appleGrid.add(title, 0, 0);

        for (int i = 1; i <= 15; i++) {
            appleGrid.add(new Text("Apple"), 0, i);
        }

        ScrollPane scrollPane = new ScrollPane(appleGrid);
        scrollPane.setPrefViewportWidth(80);
        scrollPane.setPrefViewportHeight(80);
        scrollPane.setMaxSize(ScrollPane.USE_PREF_SIZE, ScrollPane.USE_PREF_SIZE);

        BorderPane borderPane = new BorderPane();
        borderPane.setTop(new Label("Header"));
        borderPane.setCenter(scrollPane);
        borderPane.setBottom(new Label("Bottom"));

        primaryStage.setScene(new Scene(borderPane, 600, 400));
        primaryStage.show();
    }

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