如何防止我的网格窗格以不同方式调整大小？

Question

package com.example.project;

import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.Region;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import java.net.URL;
import java.util.ResourceBundle;

public class Scene2Controller implements Initializable {

    @FXML
    private ComboBox boardSizeCombo;
    @FXML
    private GridPane grid;
    @FXML
    private ComboBox colourCombo;

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        colourCombo.getItems().add("Red and White");
        colourCombo.getItems().add("Orange and White");

        boardSizeCombo.getItems().add("9x9");
        boardSizeCombo.getItems().add("10x10");

    boardSizeCombo.setOnAction((actionEvent ->{
        int selectedIndex = boardSizeCombo.getSelectionModel().getSelectedIndex();
        if (selectedIndex == 0){
        int count = 0;
        double s = 100; // side of rectangle
        for (int i = 0; i < 8; i++) {
            count++;
            for (int j = 0; j < 8; j++) {
                Rectangle r = new Rectangle(s, s, s, s);
                if (count % 2 == 0)
                    r.setFill(Color.WHITE);
                grid.add(r, j, i);
                count++;
            }
        }
        }
        if (selectedIndex == 1){
            int count = 0;
            double s = 100; // side of rectangle
            for (int i = 0; i < 8; i++) {
                count++;
                for (int j = 0; j < 8; j++) {
                    Rectangle r = new Rectangle(s, s, s, s);
                    if (count % 2 == 0)
                        r.setFill(Color.BLUE);
                    grid.add(r, j, i);
                    count++;
                }
            }
        }

    }
    ));
}

}

用户从组合框中选择了一个选项。在这种情况下，用户为面板选择一个尺寸，然后无论用户选择什么尺寸，结果都将显示在网格窗格中。但是，它正在执行屏幕截图。有人可以帮忙解决这些限制吗？谢谢

Answer 1

您需要修复循环。

例如对于 9x9 网格

for (int i = 0; i < 8; i++) {

从 0 到 7 循环...总共 8 次迭代，而不是 9 次。对于 10x10 网格，您似乎有相同的循环。

这是一个基本的解决方案：

import javafx.scene.control.ComboBox;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.application.Application;
import javafx.event.Event;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class GridExample extends Application {
    private ComboBox boardSizeCombo;
    private GridPane grid;
    private ComboBox colourCombo;

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        grid = new GridPane();
        colourCombo = new ComboBox();
        boardSizeCombo = new ComboBox();

        colourCombo.getItems().add("Red and White");
        colourCombo.getItems().add("Orange and White");
        colourCombo.getSelectionModel().select(0);
        colourCombo.setOnAction(this::createBoard);

        boardSizeCombo.getItems().add("9x9");
        boardSizeCombo.getItems().add("10x10");
        boardSizeCombo.getSelectionModel().select(0);
        boardSizeCombo.setOnAction(this::createBoard);

        createBoard(null);
        
        HBox topPane = new HBox(new Label("Try it..."));
        VBox sidePane = new VBox(8, colourCombo, boardSizeCombo);
        BorderPane root = new BorderPane(grid, topPane, null, null, sidePane);
        root.setPadding(new Insets(8));
        Scene scene = new Scene(root);
        primaryStage.setScene(scene);
        primaryStage.setMinWidth(700);
        primaryStage.setMinHeight(600);
        primaryStage.show();
    }

    void createBoard(Event e) {
        int colourIndex = colourCombo.getSelectionModel().getSelectedIndex();
        int sizeIndex = boardSizeCombo.getSelectionModel().getSelectedIndex();

        int n = sizeIndex == 0 ? 9 : 10;
        Color baseColour = colourIndex == 0 ? Color.RED : Color.ORANGE;

        grid.getChildren().clear();
        double s = 50; // side of rectangle
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                Rectangle r = new Rectangle(s, s, s, s);
                r.setFill((((i ^ j) & 1) == 0) ? Color.WHITE : baseColour);
                grid.add(r, j, i);
            }
        }
    }
}

如何防止我的网格窗格以不同方式调整大小？

How to prevent my gridpane from resizing differently?

javafx