/*
 * Created on Apr 5, 2005
 */
package WordPro2Controller;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;

import javax.swing.JPanel;

import WordPro2Document.IDocument;

/** A class which can display a document graphically.
 * You need to modify this class.
 * If you define additional fields or methods, they must be private.
 */
public class DocumentViewer extends JPanel {
    
    private IDocument theDocument;
    
    /** Request that a document be displayed on this panel.
     * Normally you would call this method from MyDocument.  The
     * argument would normally be 'this'. 
     * You should not have to change this method.  If you think you do,
     * you probably should think again.
     * @param aDocument a non-null document.
     */
    public void display(IDocument aDocument) {
        this.theDocument = aDocument;
        repaint();
    }
    
    /** DO NOT CALL THIS METHOD.  Take it on blind faith that it will
     * get called when needed.  Instead of calling this method, MyDocument
     * normally should just call display. In fact, the disply method,
     * as coded above, will indirectly cause paintComponent to be called.
     * DO NOT change the signature (name, return value, arguments, etc.).
     * But do modify the code!  All your code for displaying the document should
     * be here.
     */
    public void paintComponent(Graphics oldG) {
        //Always start your paint methods with this cast.
        Graphics2D g = (Graphics2D) oldG;
        //Then always call the superclass version
        super.paintComponent(g);
        int x = 5;
        int y = 10;
        final int linespacing = 20;
        g.drawString("Here's a line as a test.", x, y);
        y += linespacing;
        g.drawString("The next line would start further down (by changing y)",
                x, y);
        y += linespacing;
        g.drawString("These lines are just a demo.", x, y);
        y += linespacing;
        g.drawString("The first person to ask, \"Is it OK to delete " +
                " or change these lines?\"", x, y);
        y += linespacing;
        g.drawString("that person flunks the class automatically.", x, y);
        y += linespacing;
        
        for (int line = 0; line < 100; line++) {
            g.drawString("just another line.", x, y);
            y += linespacing;
        }
        
        //adjust the height of the visible window.
        //otherwise, it won't appear to scroll.
        //Do this after you have written all the data.
        int width = this.getSize().width;
        this.setPreferredSize(new Dimension(width, y));
        this.revalidate();
    }


}