Misfortunes of alignment

Sorry for the Newbie question, but I'm having some strange results trying to align the contents of a GridPane.

First, here's my hierarchy:
In a TabPane, I have a tab that contains a BorderPane. The BorderPane has a label in the upper part, a label in the left and a GridPane in the Center. Line 1 contains 10 labels marked '1' to '10', starting in column 2. Column 1 contains 10 labels also labeled "1" through "10" from rank 2. I then a grid of 10 x 10 of option buttons start grid 2.2 through 11.11.

When I resize the application, the labels in the BorderPane move at their Center as you like, but won't resize nodes in the GridPane. I tried to use constraints of line and column, placing at 10%, but I get strange results. Redimensionneront columns, the last column goes out of the window but the lines have not changed. I also see the label in the left area of the BorderPane is no longer visible.

Any suggestions on how I can get the GridPane to resize correctly?

Thank you!

Isn't the problem simply that you have 11 rows/columns, each with 10% of the height and width?

It works for me:

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.ColumnConstraints;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.RowConstraints;
import javafx.stage.Stage;

public class RadioButtonGrid extends Application {

  @Override
  public void start(Stage primaryStage) {
    final BorderPane root = new BorderPane();
    final Label colHeader = new Label("Main Column Header");
    colHeader.setMaxWidth(Double.POSITIVE_INFINITY);
    colHeader.setAlignment(Pos.CENTER);
    root.setTop(colHeader);
    final Label rowHeader = new Label("Main Row Header");
    root.setLeft(rowHeader);
    rowHeader.setRotate(90);
    rowHeader.setMaxHeight(Double.POSITIVE_INFINITY);
    rowHeader.setAlignment(Pos.CENTER);
    final int numRows = 10;
    final int numCols = 10;
    final GridPane grid = new GridPane();
    ColumnConstraints leftColConstraints = new ColumnConstraints();
    leftColConstraints.setPercentWidth(10);
    RowConstraints topRowConstraints = new RowConstraints();
    topRowConstraints.setPercentHeight(10);
    grid.getColumnConstraints().add(leftColConstraints);
    grid.getRowConstraints().add(topRowConstraints);
    for (int x = 0; x < numCols; x++) {
      grid.add(new Label("ABCDEFGHIJ".substring(x, x + 1)), x + 1, 0);
      ColumnConstraints colConstraints = new ColumnConstraints();
      colConstraints.setPercentWidth(9);
      grid.getColumnConstraints().add(colConstraints);
      for (int y = 0; y < numRows; y++) {
        grid.add(new RadioButton(), x + 1, y + 1);
      }
    }
    for (int y = 0; y < numRows; y++) {
      grid.add(new Label(Integer.toString(y + 1)), 0, y + 1);
      RowConstraints rowConstraints = new RowConstraints();
      rowConstraints.setPercentHeight(9);
      grid.getRowConstraints().add(rowConstraints);
    }
    root.setCenter(grid);
    primaryStage.setScene(new Scene(root, 600, 600));
    primaryStage.show();
  }

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

Tags: Java

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