Rotating an image 90 Degrees

[cvillejin]

Hi, I'm trying to rotate an image 90 degrees clockwise AND counterclockwise
at the click of a button. For instance if a click something that says "clockwise" it rotates my image 90 degrees clockwise. someone told me to use the code:

public abstract void rotate(double theta,
double x,
double y)

but I don't know how I'm supposed to use this code...nor where am i am supposed to put it. I mean, where/how do i put the 90 degrees in? inside of theta just put 90? and i put this entire code in mouse listeners? waitforClick(); ??

someone please help

[Fubarable]

Consider providing more details to your question, enough so that we may be able to help you. A good resource that can give you good suggestions on just what we need are the links on how to ask a smart question and how to create an SSCCE, both in my signature links below. Luck.

[cvillejin]

can someone give example of how to use the code above? and also

i think there's something wrong with my for loop in the public GImage crop or my initialization of int[][] cropped, but i don't know how to revise it

i got an error saying the following and i don't know how to fix it:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 200
at ImageBanner.crop(ImageBanner.java:116)
at ImageBanner.splitImage(ImageBanner.java:100)
at ImageBanner.mouseClicked(ImageBanner.java:170)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEvent Multicaster.java:253)
at java.awt.Component.processMouseEvent(Component.jav a:6270)
at java.awt.Component.processEvent(Component.java:603 2)
at java.awt.Container.processEvent(Container.java:204 1)
at java.awt.Component.dispatchEventImpl(Component.jav a:4630)
at java.awt.Container.dispatchEventImpl(Container.jav a:2099)
at java.awt.Component.dispatchEvent(Component.java:44 60)
at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4247)
at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4168)
at java.awt.Container.dispatchEventImpl(Container.jav a:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478 )
at java.awt.Component.dispatchEvent(Component.java:44 60)
at java.awt.EventQueue.dispatchEvent(EventQueue.java: 599)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:122)

import acm.graphics.*;
import acm.program.*;
import java.awt.event.*;
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;

// -------------------------------------------------------------------------
/**
* @author 
* @version 2011.03.25
*/
public class ImageBanner extends StudentTestableGraphicsProgram
{
    //~ Instance/static variables .............................................
    public static final int APPLICATION_WIDTH = 1024;
    public static final int APPLICATION_HEIGHT = 600;

    public int screenWidth;
    public int screenHeight;

    public GImage pic;

    public GImage bannerOne;
    public GImage bannerTwo;
    public GImage bannerThree;
    public GImage bannerFour;
    public GImage bannerFive;

    GImage sized;

    GOval rClockwise;
    GLabel rClockwise2 = new GLabel("Clockwise");

    GOval rCounter;
    GLabel rCounter2 = new GLabel("Counterclock");

    GOval iSplit;
    GLabel iSplit2 = new GLabel("Split!");

    //~ Methods ...............................................................

    // ----------------------------------------------------------
    /**
    *
    */
    public void init()
    {
        addMouseListeners();
        //find an image to display
        String file = chooseImage();
        pic = new GImage(file);
        
        //resizes image to 485,68
        pic = lossyResize(pic, 485, 200);
        pic = rotateClockwise(pic);

        //creates button for rotating image clockwise
        rClockwise = new GOval(150, 100);
        add(rClockwise, 10, 450);
        add(rClockwise2, 20, 510);
        rClockwise2.setFont("Serif-Bold-30");
        rClockwise.setFillColor(Color.GREEN);
        rClockwise.setFilled(true);

        //creates button for rotating image counterclockwise
        rCounter = new GOval(170, 120);
        add(rCounter, 300, 450);
        add(rCounter2, 310, 520);
        rCounter2.setFont("Serif-Bold-25");
        rCounter.setFillColor(Color.YELLOW);
        rCounter.setFilled(true);

        //creates button for splitting image into 5 banner parts
        iSplit = new GOval(150, 100);
        add(iSplit, 590, 450);
        add(iSplit2, 630, 510);
        iSplit2.setFont("Serif-Bold-30");
        iSplit.setFillColor(Color.RED);
        iSplit.setFilled(true);
        
       

    }
    /**
     *
     */
    public void run()
    {

        add(pic, 200, 50);
    }
    //splits images into 5 seperate pieces
    public void splitImage(GImage image)
    {
        int width =(int) image.getWidth() / 5;

        bannerOne = crop(image, 0, 0, width,(int) image.getHeight());
        bannerTwo = crop(image, width, 0, width,(int) image.getHeight());
        bannerThree = crop(image, width * 2, 0, width,(int) image.getHeight());
        bannerFour = crop(image, width * 3, 0, width,(int) image.getHeight());
        bannerFive = crop(image, width * 4, 0, width,(int) image.getHeight());

    }
    //crops images
    public GImage crop(GImage image, int x, int y, int width, int height)
    {
        int[][] cropped = new int[width][height];
        int[][] imageArray = image.getPixelArray();
        for(int xPos = x; xPos < x + width; xPos++)
        {
            for(int yPos = y; yPos < y + height; yPos++)
            {
                cropped[xPos - x][yPos - y] = imageArray[xPos][yPos];
            }
        }

        return new GImage(cropped);
    }
    //rotates image clockwise
    public GImage rotateClockwise(GImage image)
    {
        int[][] original = image.getPixelArray();
        int[][] rotated = new int[original[0].length][original.length];

        for(int x = 0; x < original.length; x++)
        {
            for(int y = 0; y < original[0].length; y++)
            {
                rotated[y][x] = original[x][y];
            }
        }

        return new GImage(rotated);

    }
   
    /**
     *
     */
    public void mouseClicked(MouseEvent e)
    {
       double x = e.getX();
       double y = e.getY();
       //allows user to click the button clockwise
        if(rClockwise.contains(x,y))
        {
            System.out.println("Rotate noww");
            pic = rotateClockwise(pic);
          
        }
        
       //allows user to click the button counter
        if(rCounter.contains(x,y))
        {
            System.out.println("COUNTERRR");
            
        }    
        
        //allows users to click the button split
        if(iSplit.contains(x,y))
        {
            System.out.println("SPLIT NUKKA");
            
        }
        
        //adds the 5 split banner images
        splitImage(pic);
        add(bannerOne, 0, 0);
        add(bannerTwo, 0, 100);
        add(bannerThree, 0, 200);
        add(bannerFour, 0, 300);
        add(bannerFive, 0, 400);

    }
    /**
     * [Author: ] Converts a GImage to be of a new width and height and returns it
     * Note that this process is "lossy" so the returned GImage will have lesser resolution than
     * the original if it is smaller size, and there is not a way to reverse this loss of precision
     * @param orig, the original GImage to resize
     * @param width the desired new width of the image
     * @param height the desired new height of the image
     * @return the GImage orig, resized to widthXheight
     */
    public GImage lossyResize(GImage orig, double width, double height)
    {
        return new GImage(orig.getImage().getScaledInstance((int) width,(int) height, 0));
    }
    /**
     * [Author: ] Saves a GImage to disk as a png file
     * @param picture A GImage picture that will be converted to png format and saved on disk
     * @param filename The name of the file to save (path optional, default to project folder.  e.g. "output.png")
     */
    public void saveImage(GImage picture, String filename)
    {
        try
        {
            File name = new File(filename);
            Image img = picture.getImage();
            BufferedImage buff = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_RGB);
            Graphics graph = buff.getGraphics();
            graph.drawImage(img, 0, 0, null);
            graph.dispose();
            ImageIO.write(buff, "png",name);
        }
        catch(IOException e)
        {
            System.out.println("Error when writing file: " + e.toString());
        }
    }
    /**
     * [Author: ] Shows a file browser dialog so the user can choose a file.
     * Only image files *should* be chosen, but this method does not prevent other types of files to be chosen.
     * @return A string representing the path and filename chosen (e.g. "C:\My Documents\image.jpg")
     */
    public String chooseImage()
    {
        JFileChooser dialog = new JFileChooser();
        int result = dialog.showOpenDialog(this);
        if(result == JFileChooser.APPROVE_OPTION)
        {
            return dialog.getSelectedFile().getPath();
        }
        else
            return "";
    }
}

[Fubarable]

I think a problem that most of us will have in answering this question is that it involves non-standard libraries, in particular, the acm.graphics and acm.program libraries.

[cvillejin]

can someone tell me how to use the code:

public abstract void rotate(double theta,
double x,
double y)

?