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Thread: Greeting Card Question

  1. #1
    Junior Member
    Join Date
    Dec 2011
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    Default Greeting Card Question

    My java assignment is to create a program that lets the user create a christmas card. The following code shows that. I have currently run into some difficulty though with implementation of some of the buttons. Although I have many questions, I just started working on this tonight and won't ask them all. Currently I am stuck on the resize portion of the project. I have asked the user for the number they want to resize to and it reads it in, but I do not know how to select the figure and the object that corresponds to it in order to use the resize function. I'll include my main, MyShape, MyText, and a figure so you understand how it works. Thanks for any help!

    The majority of the code I changed/wrote was from the beginning up to the MyShape class. The teacher gave us a base to write our program off of. I have the other buttons added on except for the snowman and have most of the other buttons created. a few work completely, but I just started tonight. Thanks again.

    // CS 401 Fall 2011

    // For additional help, see Sections 14.5-14.6 in the text

    import javax.swing.*;
    import java.awt.*;
    import java.awt.geom.*;
    import java.awt.event.*;
    import java.util.*;
    import java.io.*;
    import java.awt.print.*;

    // Create enum types that will be useful in the program

    // Code extracted from Oracle Java Example programs. See link below for full code:
    // http://docs.oracle.com/javase/tutori...tUIWindow.java
    class thePrintPanel implements Printable
    JPanel panelToPrint;

    public int print(Graphics g, PageFormat pf, int page) throws
    if (page > 0) { /* We have only one page, and 'page' is zero-based */
    return NO_SUCH_PAGE;

    /* User (0,0) is typically outside the imageable area, so we must
    * translate by the X and Y values in the PageFormat to avoid clipping
    Graphics2D g2d = (Graphics2D)g;
    g2d.translate(pf.getImageableX(), pf.getImageableY());

    /* Now print the window and its visible contents */

    /* tell the caller that this page is part of the printed document */
    return PAGE_EXISTS;

    public thePrintPanel(JPanel p)
    panelToPrint = p;

    public class Assig5
    private ShapePanel drawPanel;
    private JPanel buttonPanel;
    private JButton makeShape;
    private JRadioButton makeTree, makeFlake, makeGreet, makeHouse, makeGift;
    private ButtonGroup shapeGroup;
    private Figures currShape;
    private JLabel msg;
    private JMenuBar theBar, editBar;
    private JMenu fileMenu, editMenu;
    private JMenuItem newScene, openScene, saveScene,saveAsScene, endProgram, printScene,cutItem,copyItem,pasteItem;
    private JPopupMenu popper;
    private JMenuItem delete,resize;
    private JFrame theWindow;
    private StringBuilder Shapes;

    // This ArrayList is used to store the shapes in the program.
    // It is specified to be of type MyShape, so objects of any class
    // that implements the MyShape interface can be stored in here.
    // See Section 8.13 in your text for more info on ArrayList.
    private ArrayList<MyShape> shapeList;
    private ArrayList<MyShape> saveList;
    private MyShape newShape;

    public Assig5()
    drawPanel = new ShapePanel(500, 300);
    buttonPanel = new JPanel();
    buttonPanel.setLayout(new GridLayout(3, 2));

    makeShape = new JButton("Make Shape");

    ButtonHandler bhandler = new ButtonHandler();

    msg = new JLabel("");

    makeTree = new JRadioButton("Tree", false);
    makeFlake = new JRadioButton("Snowflake", true);
    makeGreet = new JRadioButton("Greeting", false);
    makeHouse = new JRadioButton("House",false);
    makeGift = new JRadioButton("Gift",false);

    RadioHandler rhandler = new RadioHandler();


    // A ButtonGroup allows a set of JRadioButtons to be associated
    // together such that only one can be selected at a time
    shapeGroup = new ButtonGroup();

    currShape = Figures.SNOWFLAKE;

    theWindow = new JFrame("CS 401 Assig5 Greeting Card!");

    Container c = theWindow.getContentPane();
    c.add(drawPanel, BorderLayout.NORTH);
    c.add(buttonPanel, BorderLayout.SOUTH);

    // Note how the menu is created. First we make a JMenuBar, then
    // we put a JMenu in it, then we put JMenuItems in the JMenu. We
    // can have multiple JMenus if we like. JMenuItems generate
    // ActionEvents, just like JButtons, so we just have to link an
    // ActionListener to them.
    theBar = new JMenuBar();
    fileMenu = new JMenu("File");
    newScene = new JMenuItem("New");
    openScene = new JMenuItem("Open");
    saveScene = new JMenuItem("Save");
    saveAsScene = new JMenuItem("Save As");
    printScene = new JMenuItem("Print");
    endProgram = new JMenuItem("Exit");

    editMenu = new JMenu("Edit");
    cutItem = new JMenuItem("Cut");
    copyItem = new JMenuItem("Copy");
    pasteItem = new JMenuItem("Paste");

    // JPopupMenu() also holds JMenuItems. To see how it is actually
    // brought out, see the mouseReleased() method in the ShapePanel class
    // below.
    popper = new JPopupMenu();
    delete = new JMenuItem("Delete");
    resize = new JMenuItem("Resize");

    theWindow.setDefaultCloseOperation(WindowConstants .DO_NOTHING_ON_CLOSE);

    public static void main(String [] args)
    new Assig5();

    // See Section 7.5 for information on JRadioButtons. Note that the
    // text uses ActionListeners to handle JRadioButtons. Clicking on
    // a JRadioButton actually generates both an ActionEvent and an
    // ItemEvent. I am using the ItemEvent here. To handle the event,
    // all I am doing is changing a state variable that will affect the
    // MouseListener in the ShapePanel.
    private class RadioHandler implements ItemListener
    public void itemStateChanged(ItemEvent e)
    if (e.getSource() == makeTree)
    currShape = Figures.TREE;
    else if (e.getSource() == makeFlake)
    currShape = Figures.SNOWFLAKE;
    else if (e.getSource() == makeGreet)
    currShape = Figures.GREETING;
    else if(e.getSource() == makeHouse)
    currShape = Figures.HOUSE;
    else if(e.getSource()== makeGift)
    currShape = Figures.GIFT;

    // Note how the makeShape button and moveIt menu item are handled
    // -- we again simply set the state in the panel so that the mouse will
    // actually do the work. The state needs to be set back in the mouse
    // listener.
    private class ButtonHandler implements ActionListener
    public void actionPerformed(ActionEvent e)
    if (e.getSource() == makeShape)
    msg.setText("Position new shape with mouse");
    else if (e.getSource() == delete)
    boolean ans = drawPanel.deleteSelected();
    if (ans)
    msg.setText("Shape deleted");
    else if(e.getSource() == resize)
    String resizeOption = JOptionPane.showInputDialog("Enter the new size: ");
    int resizeNum = Integer.parseInt(resizeOption);
    //how to get the shape then reisze?

    else if (e.getSource() == printScene)
    Printable thePPanel = new thePrintPanel(drawPanel);
    PrinterJob job = PrinterJob.getPrinterJob();
    boolean ok = job.printDialog();
    if (ok)
    try {
    catch (PrinterException ex) {
    /* The job did not successfully complete */
    else if (e.getSource() == endProgram)
    else if (e.getSource() == saveScene)

    //It chosesfile correctly, just doensn't output what i want
    String fname;
    fname = JOptionPane.showInputDialog("Enter file name: ");
    ArrayList copyOfShapeList = new ArrayList();

    Shapes = new StringBuilder();
    StringBuilder S1= new StringBuilder();
    //S1 = shapeList.clone();
    //saveList = shapeList.clone();
    int arraysize = copyOfShapeList.size();

    for(int i=0; i<=(arraysize-1);i++)

    PrintWriter out = new PrintWriter(new FileWriter(fname));

    }catch(IOException w){



    else if (e.getSource() == saveAsScene)
    //Code for save as

    else if (e.getSource() == newScene)
    //Code for new Scene



    // Here we are extending JPanel. This way we can use all of the
    // properties of JPanel (including generating MouseEvents) and also
    // add new instance data and methods, as shown below. Since this is
    // an inner class, it can access instance variables from the A5Help
    // class if necessary.
    private class ShapePanel extends JPanel

    // These instance variables are used to store the desired size
    // of the panel
    private int prefwid, prefht;

    // Store index of the selected MyShape. This allows the Shape
    // to be moved and updated.
    private int selindex;

    // Keep track of positions where mouse is moved on the display.
    // This is used by mouse event handlers when moving the shapes.
    private int x1, y1, x2, y2;

    private boolean popped; // has popup menu been activated?

    private Mode mode; // Keep track of the current Mode

    public ShapePanel (int pwid, int pht)
    shapeList = new ArrayList<MyShape>();
    //saveList = new ArrayList<String>();// create empty ArrayList
    selindex = -1;

    prefwid = pwid; // values used by getPreferredSize method below
    prefht = pht; // (which is called implicitly). This enables
    // the JPanel to request the room that it needs.
    // However, the JFrame is not required to honor
    // that request.

    setOpaque(true);// Paint all pixels here (See API)


    addMouseListener(new MyMouseListener());
    addMouseMotionListener(new MyMover());
    popped = false;
    } // end of constructor

    // This class is extending MouseAdapter. MouseAdapter is a predefined
    // class that implements MouseListener in a trivial way (i.e. none of
    // the methods actually do anything). Extending MouseAdapter allows
    // a programmer to implement only the MouseListener methods that
    // he/she needs but still satisfy the interface (recall that to
    // implement an interface one must implement ALL of the methods in the
    // interface -- in this case I do not need 3 of the 5 MouseListener
    // methods)
    private class MyMouseListener extends MouseAdapter
    public void mousePressed(MouseEvent e)
    x1 = e.getX(); // store where mouse is when clicked
    y1 = e.getY();

    if (!e.isPopupTrigger() && (mode == Mode.NONE ||
    mode == Mode.SELECTED)) // left click and
    { // either NONE or
    if (selindex >= 0) // SELECTED mode
    unSelect(); // unselect previous shape
    mode = Mode.NONE;
    selindex = getSelected(x1, y1); // find shape mouse is
    // clicked on
    if (selindex >= 0)
    mode = Mode.SELECTED; // Now in SELECTED mode for shape

    // Check for double-click. If so, show dialog to update text of
    // the current text shape (will do nothing if shape is not a MyText)
    MyShape curr = shapeList.get(selindex);
    if (curr instanceof MyText && e.getClickCount() == 2)
    String newText = JOptionPane.showInputDialog(theWindow, "Enter new text [Cancel for no change]");
    if (newText != null)
    ((MyText) curr).setText(newText);
    else if (e.isPopupTrigger() && selindex >= 0) // if button is
    { // the popup menu
    popper.show(ShapePanel.this, x1, y1); // trigger, show
    popped = true; // popup menu
    public void mouseReleased(MouseEvent e)
    if (mode == Mode.DRAW) // in DRAW mode, create the new Shape
    { // and add it to the list of Shapes
    if (currShape == Figures.TREE)
    newShape = new Tree(x1,y1,50);
    else if (currShape == Figures.SNOWFLAKE)
    newShape = new Snowflake(x1,y1,10);
    else if (currShape == Figures.GREETING)
    newShape = new Greeting(x1,y1,30);
    else if(currShape == Figures.HOUSE)
    newShape = new House(x1,y1,50);
    else if(currShape == Figures.GIFT)
    newShape = new Gift(x1,y1,30);
    makeShape.setEnabled(true); // Set interface back to
    mode = Mode.NONE; // "base" state

    // In MOVING mode, set mode back to NONE and unselect shape (since
    // the move is now finished).
    else if (mode == Mode.MOVING)
    mode = Mode.NONE;

    else if (e.isPopupTrigger() && selindex >= 0) // if button is
    { // the popup menu trigger, show the
    popper.show(ShapePanel.this, x1, y1); // popup menu
    popped = false; // unset popped since mouse is being released

    // the MouseMotionAdapter has the same idea as the MouseAdapter
    // above, but with only 2 methods. The method not implemented
    // here is mouseMoved
    private class MyMover extends MouseMotionAdapter
    public void mouseDragged(MouseEvent e)
    x2 = e.getX(); // store where mouse is now
    y2 = e.getY();

    // Note how easy moving the shapes is, since the "work"
    // is done within the various shape classes. All we do
    // here is call the appropriate method. However, we don't
    // want to accidentally move the selected shape with a right click
    // so we make sure the popup menu has not been activated.
    if ((mode == Mode.SELECTED || mode == Mode.MOVING) && !popped)
    MyShape s = shapeList.get(selindex);
    mode = Mode.MOVING;
    s.move(x2, y2);
    repaint(); // Repaint screen to show updates

    // Check to see if point (x,y) is within any of the shapes. If
    // so, select that shape and highlight it so user can see.
    // This version of getSelected() always considers the shapes from
    // beginning to end of the ArrayList. Thus, if a shape is "under"
    // or "within" a shape that was previously created, it will not
    // be possible to select the "inner" shape. In your assignment you
    // must redo this method so that it allows all shapes to be selected.
    // Think about how you would do this.
    private int getSelected(double x, double y)
    for (int i = 0; i < shapeList.size(); i++)
    if (shapeList.get(i).contains(x, y))
    return i;
    return -1;

    public void unSelect()
    if (selindex >= 0)
    selindex = -1;

    public boolean deleteSelected()
    if (selindex >= 0)
    selindex = -1;
    return true;
    else return false;

    public void setMode(Mode newMode) // set Mode
    mode = newMode;

    private void addShape(MyShape newshape) // Add shape
    repaint(); // repaint so we can see new shape

    // Method called implicitly by the JFrame to determine how much
    // space this JPanel wants
    public Dimension getPreferredSize()
    return new Dimension(prefwid, prefht);

    // This method enables the shapes to be seen. Note the parameter,
    // which is implicitly passed. To draw the shapes, we in turn
    // call the draw() method for each shape. The real work is in the draw()
    // method for each MyShape
    public void paintComponent (Graphics g)
    super.paintComponent(g); // don't forget this line!
    Graphics2D g2d = (Graphics2D) g;
    for (int i = 0; i < shapeList.size(); i++)
    } // end of ShapePanel

    // CS 401 Fall 2011
    // MyShape interface for Assignment 5
    // See the method descriptions below and see the example implementation
    // in classes Snowflake and Tree. For the assignment you must complete
    // the additional implementations in classes Snowman and House.

    import java.awt.*;
    public interface MyShape
    // Draw the shape onto the Graphics2D context g.
    public void draw(Graphics2D g);

    // Move the shape's position from its previous location to location
    // (x,y). Note that (x,y) is simply a reference point for the
    // shape (ex: the lower right corner).
    public void move(int x, int y);

    // Set the shape to be highlighted or not. This method can be used
    // to indicate that the shape has been selected. There are different
    // ways to hightlight a object. Two examples are:
    // 1) Change its color when it is drawn
    // 2) Draw the perimeter of the underlying Shapes rather than filling
    // them in. For more information on this, see the Shape interface
    // and the draw() and fill() methods.
    public void highlight(boolean b);

    // Check to see if the point (x,y) is within the shape. This can
    // be implemented by testing to see if (x,y) is within the underlying
    // components of the shape.
    public boolean contains(double x, double y);

    // Resize the object to newsize. Keep it in the same location.
    public void resize(int newsize);

    // Return a String representing this object. The string should
    // have the following format:
    // ClassName:X:Y:size
    public String saveData();

    // CS 401 Fall 2011
    // Tree class as another implementation of the MyShape interface.
    // This class also uses composition, with 2 Polygons being the primary
    // components of a Tree object. For more information on Polygons, see
    // the Java API.

    import java.awt.*;
    import java.awt.geom.*;
    import java.util.*;

    class Tree implements MyShape
    // Represent a Tree in two parts -- a Polygon for the top part
    // (the branches) and another Polygon for the trunk. Since the
    // trunk is rectangular, a Rectangle2D could have been used, but
    // to keep consistent (especially with the move() method) I used
    // Polygon objects for both.
    private Polygon canopy;
    private Polygon trunk;

    // X, Y and size instance variables
    private int X, Y;
    private int size;

    private boolean isHighlighted;

    // Create a new Tree object. Note how the Polygons are built,
    // adding one point at a time to each. If you plot the points out
    // on paper you will see how the shapes are formed.
    public Tree(int startX, int startY, int sz)
    X = startX;
    Y = startY;
    size = sz;

    canopy = new Polygon();
    trunk = new Polygon();

    public void highlight(boolean b)
    isHighlighted = b;

    // The Polygon class can also be drawn with a predefined method in
    // the Graphics2D class. There are two versions of this method:
    // 1) draw() which only draws the outline of the shape
    // 2) fill() which draws a solid shape
    // In this class the draw() method is used when the object is
    // highlighted.
    public void draw(Graphics2D g)
    if (isHighlighted)
    if (isHighlighted)

    // Looking at the API, we see that Polygon has a translate() method
    // which can be useful to us. All we have to do is calculate the
    // difference of the new (x,y) and the old (X,Y) and then call
    // translate() for both parts of the tree.
    public void move(int x, int y)
    int deltaX = x - X;
    int deltaY = y - Y;
    canopy.translate(deltaX, deltaY);
    trunk.translate(deltaX, deltaY);
    X = x;
    Y = y;

    // Polygon also has a contains() method, so this method is also
    // simple
    public boolean contains(double x, double y)
    if (canopy.contains(x,y))
    return true;
    if (trunk.contains(x,y))
    return true;
    return false;

    // The move() method for the Polygons that are in Tree are not
    // reconfigured like in Snowflake, so we can't use the trick used
    // there. Instead, we just create new Polygons with the new size.
    // The old ones will be garbage collected by the system.
    public void resize(int newsize)
    size = newsize;
    canopy = new Polygon();
    trunk = new Polygon();

    // Note again the format
    public String saveData()
    return ("Tree:" + X + ":" + Y + ":" + size);

    // CS 401 Fall 2011
    // MyText interface for Assignment 5
    // This interface simply adds one method to MyShape (note that it inherits
    // the other methods, so a class implementing MyText must also implement
    // all of the MyShape methods)

    public interface MyText extends MyShape
    public void setText(String newText);

    /* Note: saveData is not a new method for this interface, but the format
    requires an additional field for the text. Thus, for MyText objects,
    the output to saveData will be
    public String saveData();

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,406 Times in 2,359 Posts

    Default Re: Greeting Card Question

    Please edit your post and wrap the code in code tags: [code]
    See: http://www.javaprogrammingforums.com/misc.php?do=bbcode#code

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