JavaFX - Gridpane Growing Issue

Question

嗨，我目前正在玩JavaFX中的GridPane，偶然发现了一个问题...我想创建一个包含三行的布局，其中中间一行增长并占用所有可用空间，但我就是无法让它工作。中间行变得太大，并将窗口下方的底部行“推”到不再可见的位置...我如何使底部行始终在底部，让中间行占用中间的可用空间，但不能再这样了...我将在下面粘贴我的代码。

谢啦！

(注意:为清晰起见，代码略有改动，但工作方式相同)

RowConstraints row1 = new RowConstraints(25);
row1.setVgrow(Priority.NEVER);

RowConstraints row2 = new RowConstraints();
row2.setVgrow(Priority.ALWAYS);

RowConstraints row3 = new RowConstraints(25);
row3.setVgrow(Priority.NEVER);

ColumnConstraints column1 = new ColumnConstraints();
column1.setPercentWidth(100);

gridPane.getRowConstraints().add(0, row1);
gridPane.getRowConstraints().add(1, row2);
gridPane.getRowConstraints().add(2, row3);

gridPane.getColumnConstraints().add(0, column1);

gridPane.add(node1, 0, 0);
gridPane.add(node2, 0, 1);
gridPane.add(node3, 0, 2);

更新！添加“最小、完整和可验证的示例”

Test.java

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.MenuBar;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.RowConstraints;
import javafx.stage.Stage;

public class Test extends Application {

    @Override
    public void start(Stage primaryStage) {
        GridPane grid = new GridPane();

        MenuBar menuBar = new MenuBar();
        TestPane pane = new TestPane();

        RowConstraints menuRow = new RowConstraints(25);

        RowConstraints regRow = new RowConstraints();
        regRow.setPercentHeight(100);

        ColumnConstraints regColumn = new ColumnConstraints();
        regColumn.setPercentWidth(100);

        grid.getColumnConstraints().addAll(regColumn);
        grid.getRowConstraints().addAll(menuRow, regRow);

        grid.add(menuBar, 0, 0);
        grid.add(pane, 0, 1);

        Scene scene = new Scene(grid, 500, 350);

        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

TestPane.java

import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Priority;
import javafx.scene.layout.RowConstraints;

public class TestPane extends GridPane {

    public TestPane() {
        RowConstraints fixedRow = new RowConstraints(25);
        fixedRow.setVgrow(Priority.NEVER);

        RowConstraints growingRow = new RowConstraints();
        growingRow.setVgrow(Priority.ALWAYS);

        ColumnConstraints column = new ColumnConstraints();
        column.setPercentWidth(100);

        this.getRowConstraints().addAll(fixedRow, growingRow, fixedRow);
        this.getColumnConstraints().addAll(column);

        TextField field1 = new TextField();
        ListView list = new ListView<>();
        TextField field2 = new TextField();

        this.add(field1, 0, 0);
        this.add(list, 0, 1);
        this.add(field2, 0, 2);
    }
}

Answer 1

在“外部”容器（即“测试”中定义的网格窗格）中，您有两行。顶行固定为 25 像素，而将第二行设置为容器高度的 100%。这些显然是矛盾的。（我认为）发生的事情是，第二行的内容被分配与网格窗格本身相同的高度（因为您将百分比高度设置为100%），但是由于没有足够的空间来显示所有内容，因此会被剪切。

不用设置高度百分比，只需像在< code>TestPane中一样设置< code>vgrow属性:

RowConstraints menuRow = new RowConstraints(25);

RowConstraints regRow = new RowConstraints();
//  regRow.setPercentHeight(100);
regRow.setVgrow(Priority.ALWAYS);