LinkBack URL
About LinkBacks
Why are my flowers stacked on top of each other?
Hello All,
I am trying to write a program that draws 6 flowers next to each other. I can't figure out why my flowers are stacked on top of each other. Any advice would be greatly appreciated. Thank you!tester.zip
Turtle Class:
import java.awt.*; public class Turtle extends Turtlet { private static TurtleWorld theWorld = null; /** Write words without changing the Turtle's state. */ public void say (String message) { super.say (message); theWorld.repaint(); } //====================== /** Make a circle of the given radius, Turtle at center. */ public void swingAround (double radius) { super.swingAround (radius); theWorld.repaint(); } //====================== /** Fill a circle of the given radius, Turtle at center. */ public void fillCircle (double radius) { super.fillCircle (radius); theWorld.repaint(); } //====================== /** Rotate left by left degrees; MOVE for forward steps.*/ public Turtlet move (double left, double forward) { return super.move (left, forward); } //====================== /** Rotate left by left degrees; PAINT for forward steps. */ public Turtlet paint (double left, double forward) { super.paint (left, forward); theWorld.repaint(); return this; } //====================== /** Fill a rectangle of the given width and height, Turtle at center. */ public void fillBox (double width, double height) { super.fillBox (width, height); theWorld.repaint(); } //====================== /** Create a turtle at the center of the default JFrame. */ public Turtle() { this (false, 760, 600); // special case of the constructor below } //====================== /** If makeNewWorld is true, make an additional JFrame of the given * width and height. Create a turtle at the center of the JFrame. */ public Turtle (boolean makeNewWorld, int width, int height) { super (makePage (makeNewWorld, width, height), width / 2, height / 2); } //====================== /** Only done as a separate method because super() has to be * the first statement in the any constructor. */ private static Graphics makePage (boolean makeNewWorld, int w, int h) { if (theWorld == null || makeNewWorld) theWorld = new TurtleWorld (w, h); return theWorld.getPage(); } //====================== } //################################################################### /** A TurtleWorld is a JFrame on which an Image object is drawn each time * the JFrame is repainted. Each Turtle draws on that Image object. */ class TurtleWorld extends javax.swing.JFrame { private static final int EDGE = 3, TOP = 30; // around the JFrame private Image itsPicture; private Graphics itsPage; public TurtleWorld (int width, int height) { super ("Turtle Drawings"); // set the title for the frame setDefaultCloseOperation (EXIT_ON_CLOSE); // no WindowListener setSize (width + 2 * EDGE, height + TOP + EDGE); toFront(); // put this frame in front of the BlueJ window setVisible (true); // cause a call to paint begin (width, height); } //====================== public void begin (int width, int height) { itsPicture = new java.awt.image.BufferedImage (width, height, java.awt.image.BufferedImage.TYPE_INT_RGB); itsPage = itsPicture.getGraphics(); itsPage.setColor (Color.white); itsPage.fillRect (0, 0, width, height); itsPage.setColor (Color.black); } //====================== public Graphics getPage() { return itsPage; // itsPicture.getGraphics(); => NO COLORS } //====================== public void paint (Graphics g) { if (itsPicture != null) g.drawImage (itsPicture, EDGE, TOP, this); } //====================== }
Turtlet Class:
import java.awt.Color; public class Turtlet extends FlowerMaker { public static final double DEGREE = Math.PI / 180; public static final Color RED = Color.red, BLUE = Color.blue, BLACK = Color.black, GRAY = Color.gray, YELLOW = Color.yellow, PINK = Color.pink, ORANGE = Color.orange, GREEN = Color.green, MAGENTA = Color.magenta, WHITE = Color.white; private static java.awt.Graphics thePage; ////////////////////////////////// private double heading = 0; // heading initially east private double xcor, ycor; // current position of Turtle /** Set the drawing Color to the given value. Made an instance method * only so that it cannot be called until thePage is assigned, although * the drawing color is a property of thePage, not of one Turtle. */ public void switchTo (Color given) { thePage.setColor (given); } //====================== /** Write words without changing the Turtle's state. */ public void say (String message) { thePage.drawString (message, round (xcor), round (ycor)); } //====================== /** Supply the nearest int value to methods requiring ints. */ private int round (double x) { return (int) (x + 0.5); } //====================== /** Make a circle of the given radius, Turtle at center. */ public void swingAround (double radius) { if (radius > 0.0) { int rad = round (2 * radius); thePage.drawOval (round (xcor - radius), round (ycor - radius), rad, rad); } } //====================== /** Fill a circle of the given radius, Turtle at center. */ public void fillCircle (double radius) { if (radius > 0.0) { int rad = round (2 * radius); thePage.fillOval (round (xcor - radius), round (ycor - radius), rad, rad); } } //====================== // the Turtle class, completed /** Rotate left by left degrees; MOVE for forward steps. */ public Turtlet move (double left, double forward) { heading += left * DEGREE; xcor += forward * Math.cos (heading); ycor -= forward * Math.sin (heading); return this; } //====================== /** Rotate left by left degrees; PAINT for forward steps. */ public Turtlet paint (double left, double forward) { heading += left * DEGREE; double x = xcor + forward * Math.cos (heading); double y = ycor - forward * Math.sin (heading); thePage.drawLine (round (xcor), round (ycor), round (x), round (y)); xcor = x; ycor = y; return this; } //====================== /** Fill a rectangle of the given width and height, Turtle at center. */ public void fillBox (double width, double height) { if (width > 0.0 && height > 0.0) { thePage.fillRect (round (xcor - width / 2), round (ycor - height / 2), round (width), round (height)); } } //====================== /** Pause the animation for wait milliseconds. Made a class method * so that an applet can pause an animation "between turtles". */ public static void sleep (int wait) { try { Thread.sleep (wait); }catch (InterruptedException ex) {} } //====================== /** Create a Turtlet on a given Component at a given starting position. * All Turtlets must be created from within the Component's paint() * method or from a method called by it. All Turtles live in * the same world at any given time, so changing the page is analogous * to spaceshipping the entire Turtle population to a new world. */ public Turtlet (java.awt.Graphics page, double xstart, double ystart) { if (page == null) throw new NullPointerException ("You did not give a " + "world where turtles can live!"); thePage = page; xcor = xstart; ycor = ystart; } //====================== }
FlowerMaker class:
public class FlowerMaker { // Draw two flowers each 60 pixels tall. // Start and end facing east at the base of the left flower. public void drawTwoFlowers() { Turtle florist; florist = new Turtle(); florist.drawFlower(); florist.move (90, 61); florist.drawFlower(); florist.move (90, -59); } //====================== // Start facing east at the base of the flower, right side, // with the current drawing color being BLACK (for the stem). // End facing south at the base of the flower, center. public void drawFlower() { Turtle florist; florist = new Turtle(); florist.paint (90, 50); // right side of stem florist.paint (90, 2); florist.paint (90, 50); // left side of stem florist.paint (90, 1); florist.paint (90, 10); // one-fourth of the way up the stem florist.paint (-45, 8); // draw the twig for the right leaf florist.drawLeaf(); florist.paint (45, 10); // one-half of the way up the stem florist.paint (45, 8); // draw the twig for the left leaf florist.drawLeaf(); florist.paint (-45, 30); // to top of stem, in the center florist.switchTo (Turtle.RED); florist.fillCircle (15); // draw the flower petals florist.switchTo (Turtle.BLACK); florist.move (180, 50); // return to the base of the flower } //====================== public void drawLeaf() { Turtle florist; florist = new Turtle(); florist.switchTo (Turtle.GREEN); florist.fillCircle (3); florist.move (0, 3); florist.fillCircle (2); florist.move (0, 2); florist.fillCircle (1); florist.move (0, -13); florist.switchTo (Turtle.BLACK); } //====================== }
Garden App:
public class GardenApp { // Draw 6 flowers all in a row, with a word title. public static void main (String[ ] args) { Turtle florist; florist = new Turtle(); florist.drawTwoFlowers(); // the central two florist.sleep (300); florist.move (0, 120); florist.drawTwoFlowers(); // the two right of center florist.sleep (300); florist.move (0, -240); florist.drawTwoFlowers(); // the two left of center florist.sleep (300); florist.move (40, 130); florist.switchTo (Turtle.BLUE); florist.say ("My flower garden"); // above the flowers } //====================== }
Reply With Quote
Related threads:
