HW4 Solution Chinese Flag (No Scalability)

ChineseFlag.java

// Antonio Silvestri
// 03/15/20
// HW4 Draw the Chinese Flag (No Scalability)
// CSC-112 Intermediate Java Programming
// silvestri@stcc.edu

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

public class ChineseFlag extends Application {
	@Override // Override the start method in the Application class
	public void start(Stage primaryStage) {
		Scene scene = new Scene(new ChineseFlagPane(), 600, 400);
		primaryStage.setTitle("Chinese Flag by A.C. Silvestri");
		primaryStage.setScene(scene);
		primaryStage.setResizable(false);
		primaryStage.show();
	}

	/**
	 * The main method is only needed for the IDE with limited JavaFX support.
	 * Not needed for running from the command line.
	 */
	public static void main(String[] args) {
		launch(args);
	}
}

// ****************************************************************************

class ChineseFlagPane extends Pane {
	private static double FLAGWIDTH = 600;
	private static double FLAGHEIGHT = 400;
	private static double UNITWIDTH;
	private static double UNITHEIGHT;
	
    private static final Image STARIMAGE = new Image("/images/chineseflagstar.png");

	public ChineseFlagPane() {
		UNITWIDTH = FLAGWIDTH / 2 / 15;
		UNITHEIGHT = FLAGHEIGHT / 2 / 10;
				
		this.setBackgroundColor();
		this.drawMainStar();
		this.drawSatelliteStars();
	}

	private void setBackgroundColor() {
		this.setStyle("-fx-background-color : #de2910ff;");
	}
	
	private void drawMainStar() {
		final double CENTERXOFSTAR = 5 * UNITWIDTH;
		final double CENTERYOFSTAR = 5 * UNITHEIGHT;
		final double WIDTHOFSTAR = 6 * UNITWIDTH;
		final double HEIGHTOFSTAR = 6 * UNITHEIGHT;
		
		ImageView bigStar = makeStar(CENTERXOFSTAR, CENTERYOFSTAR, WIDTHOFSTAR, HEIGHTOFSTAR, 0);
		this.getChildren().add(bigStar);
	}	
	
	private void drawSatelliteStars() {
		final double WIDTHOFSTAR = 2 * UNITWIDTH;
		final double HEIGHTOFSTAR = 2 * UNITHEIGHT;
		final int ssc[][] = {{10, 2}, {12, 4}, {12, 7}, {10, 9}}; //ssc = smallStarCenters
		for (int i = 0; i < ssc.length; i++) {
			double angle = -Math.toDegrees(Math.atan((5 - ssc[i][0]) / (ssc[i][1] - 5)));
			if (angle >= 0)
				angle = -angle;
			ImageView smallStar = makeStar(ssc[i][0] * UNITWIDTH, ssc[i][1] * UNITHEIGHT, WIDTHOFSTAR, HEIGHTOFSTAR, angle);
			this.getChildren().add(smallStar);
		}
		
	}
	
	private ImageView makeStar(double centerX, double centerY, double width, double height, double rotate) {
	    ImageView starImageView = new ImageView(STARIMAGE);
	    starImageView.setFitWidth(width);
	    starImageView.setFitHeight(height);
	    starImageView.setPreserveRatio(true);
	    starImageView.setLayoutX(centerX - width / 2);
	    starImageView.setLayoutY(centerY - height / 2);
	    starImageView.setRotate(rotate);
	    return starImageView; 
	}

}