可以决定GridPane（JavaFX）中的行数和列数

Question

我想知道是否可以决定gridpane应该具有的行数和列数。

Answer 1

您可以向ColumnConstraints添加所需数量的RowConstraints和GridPane。例如：

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

public class GridPaneForceColsAndRows extends Application {

    @Override
    public void start(Stage primaryStage) {
        GridPane root = new GridPane();
        root.setGridLinesVisible(true);
        final int numCols = 50 ;
        final int numRows = 50 ;
        for (int i = 0; i < numCols; i++) {
            ColumnConstraints colConst = new ColumnConstraints();
            colConst.setPercentWidth(100.0 / numCols);
            root.getColumnConstraints().add(colConst);
        }
        for (int i = 0; i < numRows; i++) {
            RowConstraints rowConst = new RowConstraints();
            rowConst.setPercentHeight(100.0 / numRows);
            root.getRowConstraints().add(rowConst);         
        }
        primaryStage.setScene(new Scene(root, 800, 600));
        primaryStage.show();
    }

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