/* IntMatrix.java */ package ciips.animation; import java.io.*; import java.awt.*; /** * An example implementation of the DrawingObj interface * that can be added to the drawingPanel (an instance of * DrawingPanel). Similar to ComBox, an instance * of this object class is added to the drawing panel by using the * addDrawingObj method from DrawingPanel. * This drawing obj can be removed from the drawing panel by invoking * the removeObj method. *

* As an example, an instance of IntMatrix class can be added to * an instance of DrawingPanel, namely drawingPanel * by using the following:

 *	IntMatrix matrix1 = new IntMatrix(4);
 *	drawingPanel.addDrawingObj(matrix1);
 *	matrix1.setColor(....);
 *	matrix1.move(x, y);
 *	....
 * 
* It can then be removed from the drawing panel by:
 *	drawingPanel.removeObj(matrix1);
 * 
*

* This class implements a matrix representation with all integer entries. * @see ComBox * @see DrawingPanel#addDrawingObj * @see DrawingPanel#removeObj */ public class IntMatrix implements DrawingObj { int rows, columns; int[][] elems; /* Drawing characteristics */ int cell_size; Font font = new Font("Courier", Font.PLAIN, 12); //Font boxFont = new Font("Courier", Font.PLAIN, 12); String[] rowLabels, colLabels; String title = null; boolean[][] highlight; boolean[][] highlight2; static final int horizSpace = 32; static final int vertSpace = 17; private Color fg, bg; private int x, y; /** * Construct a matrix with the number of rows and columns specified by the * parameters of the constructor. * @param rows The number of rows of the new matrix. * @param columns The number of columns of the new matrix. */ public IntMatrix( int rows, int columns ) { int j, k; this.rows = rows; this.columns = columns; elems = new int[rows][columns]; highlight = new boolean[rows][columns]; highlight2 = new boolean[rows][columns]; for(j=0; j 4) strs[i] = strs[i].substring(0, 4); if (strs[i].length() < 4) { String blank = new String(); for (int j = 0; j < 4-strs[i].length(); j++) blank = blank.concat(" "); strs[i] = blank + strs[i]; } rowLabels[i] = new String(strs[i]); } } /** * Set a label to each column of the matrix based on the array of String * passed in as the parameter. * @param strs The array of String which holds the new label for each * column of the matrix. The length of the array must be equal to the * number of columns of the matrix. */ public void setColLabels(String[] strs) { if (strs.length != columns) { System.out.println( "Column labels do no match the number of columns!"); return; } colLabels = new String[columns]; for (int i = 0; i < columns; i++) { if (strs[i].length() > 4) strs[i] = strs[i].substring(0, 4); if (strs[i].length() < 4) { String blank = new String(); for (int j = 0; j < 4-strs[i].length(); j++) blank = blank.concat(" "); strs[i] = blank + strs[i]; } colLabels[i] = new String(strs[i]); } } /** * This method is used to draw each element of the matrix. It is only * called from the draw method of this class. * @param g Graphical context. * @param x The left most position of the box. * @param y The top most position of the box. * @param str The text to be displayed in the box. * @param fg Foreground color (text color) of the box. * @param bg Background color of the box. * @param font A fixed font, in particular size 12 plain courier. * This font instance is passed in to avoid font initialization every * repaint. */ public void drawBox(Graphics g, int x, int y, String str, Color fg, Color bg, Font font) { g.setColor(bg); g.fillRect(x, y, horizSpace, vertSpace); g.setColor(Color.black); g.drawRect(x, y, horizSpace, vertSpace); g.setColor(fg); g.setFont(font); g.drawString(str, x + 2, y + vertSpace - 4); } /** * Move the matrix to the position specified with reference to the top left * corner. * @param x The left most position of the matrix. * @param y The top most position of the matrix. */ public void move(int x, int y) { this.x = x; this.y = y; } /** * Get the left most position of the matrix. * @return The x-coordinate of the topleft corner of the matrix. */ public int getX() { return x; } /** * Get the top most position of the matrix. * @return The y-coordinate of the topleft corner of the matrix. */ public int getY() { return y; } /** * Set the foreground and background color for each element of the matrix. * The row and column labels are displayed in the inverse color mode. * @param fg The new foreground color. * @param bg The new background color. */ public void setColor(Color fg, Color bg) { this.fg = fg; this.bg = bg; } /** * This method has to be defined to fully implement the DrawingObj * interface. It calls the drawMatrix method which * draws the matrix based on the position and color previously set. * @see IntMatrix#drawMatrix */ public void draw(Graphics g) { drawMatrix(g, x, y, fg, bg); } /** * This method is only called from the draw method which * in turn is called from the drawing panel to draw the matrix based * on the position and color previously set. * @param g graphical context. * @param x The left most position of the matrix. * @param y The top most position of the matrix. * @param fg Foreground (text) color for each element. * @param bg Background color for each element. */ public void drawMatrix(Graphics g, int x, int y, Color fg, Color bg) { int j, k, elem; int posnX = x, posnY = y; // draw colLabels if (colLabels != null && colLabels.length == columns) { posnX += horizSpace + 2; for (int i = 0; i < columns; i++) { drawBox(g, posnX, posnY, colLabels[i], bg, fg, font); posnX += horizSpace + 2; } } posnX = x; // draw rowLabels if (rowLabels != null && rowLabels.length == rows) { posnY += vertSpace + 2; for (int i = 0; i < rows; i++) { drawBox(g, posnX, posnY, rowLabels[i], bg, fg, font); posnY += vertSpace + 2; } } posnY = y + vertSpace + 2; for(j=0;j 0) { posnY += 5; posnX = x + (columns/2 - 1)*(horizSpace + 2); new ComBox(posnX, posnY, title, Color.black, Color.green, font).draw(g); } } } // class IntMatrix