colorgrid.java

package prog2.colorgrid;

import javafx.beans.binding.Bindings;
import javafx.beans.binding.NumberBinding;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.application.Application;
import javafx.geometry.HPos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.stage.Stage;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;

public class ColorGrid extends Application {

    BorderPane root = new BorderPane();
    Label label = new Label("Select mode:");
    RadioButton radioColor = new RadioButton("Change color");
    RadioButton radioMove = new RadioButton("Random movevent");
    ToggleGroup toogleGroup = new ToggleGroup();
    VBox sidebar = new VBox(label, radioColor, radioMove);

    @Override
    public void start(Stage primaryStage) {
        radioColor.setToggleGroup(toogleGroup);
        radioMove.setToggleGroup(toogleGroup);

        int size = 8;
        double gapSize = 1.0;
        GridPane grid = new GridPane();
        grid.setHgap(gapSize);
        grid.setVgap(gapSize);
        grid.setGridLinesVisible(true);
        NumberBinding rectsAreaSize = Bindings.min(grid.heightProperty(), grid.widthProperty());

        for (int i = 0; i < size; ++i) {
            for (int j = 0; j < size; ++j) {
                Rectangle rect = new Rectangle(5.0, 5.0, Color.WHITE);
                rect.widthProperty().bind(rectsAreaSize.subtract(gapSize * size).divide(size));
                rect.heightProperty().bind(rectsAreaSize.subtract(gapSize * size).divide(size));
                grid.add(rect, i, j);
                GridPane.setHalignment(rect, HPos.CENTER);
            }
        }

        root.setLeft(sidebar);
        root.setCenter(grid);
        
        primaryStage.setScene(new Scene(root, 400, 400));
        primaryStage.show();
    }

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