如何使用GridPane JavaFX使按钮跨越多列/行？

我是JavaFX的新手,正在尝试使用GridPane进行简单的按钮设计.

我无法弄清楚如何使按钮跨越多个列/行,而不会将其他按钮推开.我一直在使用HBox和VBox将其他按钮组合在一起.我在按钮上尝试过setRowSpan,但这似乎不起作用.

How it is looking

How i want it to look

这是我的代码：

import javafx.stage.*;
import javafx.application.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.*;

public class SimpleGUI extends Application {
 public void start(Stage primaryStage) throws Exception {
  GridPane root = new GridPane();
  Scene scene = new Scene(root, 200, 200);

   //Buttons
   Button b1 = new Button("KNAPP 1");
   Button b2 = new Button("KNAPP 2");
   Button b3 = new Button("KNAPP 3");
   Button b4 = new Button("KNAPP 4");
   Button b5 = new Button("KNAPP 5");
   Button b6 = new Button("KNAPP 6");

   //Horizontal Box
   HBox topButtons = new HBox();
   topButtons.getChildren().add(b1);
   topButtons.getChildren().add(b2);
   topButtons.getChildren().add(b3);

   //Vertical Box
   VBox leftButtons = new VBox();
   leftButtons.getChildren().add(b4);
   leftButtons.getChildren().add(b5);

   //Placement
   GridPane.setConstraints(topButtons, 0,0);
   GridPane.setConstraints(leftButtons, 0,1);
   GridPane.setConstraints(b6, 1,1);

   //Length (3 Columns, 2 Rows)
   GridPane.setColumnSpan(topButtons, 3);
   GridPane.setRowSpan(leftButtons, 2);

   //Add them to the stage
   root.getChildren().add(topButtons);
   root.getChildren().add(leftButtons);
   root.getChildren().add(b6);

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

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

解决方法:

由于您使用的是网格窗格,因此您不需要HBox和VBox：

import javafx.stage.*;
import javafx.application.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.*;

public class SimpleGUI extends Application {
 public void start(Stage primaryStage) throws Exception {
  GridPane root = new GridPane();
  Scene scene = new Scene(root);

   //Buttons
   Button b1 = new Button("KNAPP 1");
   Button b2 = new Button("KNAPP 2");
   Button b3 = new Button("KNAPP 3");
   Button b4 = new Button("KNAPP 4");
   Button b5 = new Button("KNAPP 5");
   Button b6 = new Button("KNAPP 6");

   root.add(b1, 0, 0);
   root.add(b2, 1, 0);
   root.add(b3, 2, 0);

   root.add(b4, 0, 1);
   root.add(b5, 0, 2);

   // node, columnIndex, rowIndex, columnSpan, rowSpan:
   root.add(b6, 1, 1, 2, 2);

   // allow button to grow:
   b6.setMaxSize(Double.MAX_VALUE, Double.MAX_VALUE);

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

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

标签：gridpane,java,javafx,button,javafx-8
来源： https://codeday.me/bug/20190727/1553328.html