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Java Source | 2002-09-06 | 11.0 KB | 320 lines |
- /*
- * Copyright (c) 2002 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * -Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
- * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
- * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT
- * BE LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
- * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF THE SOFTWARE OR ITS
- * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
- * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
- * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
- * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN
- * IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed, licensed or intended for
- * use in the design, construction, operation or maintenance of any nuclear
- * facility.
- */
-
- /*
- * @(#)BarChart.java 1.12 02/06/13
- */
-
- import java.awt.*;
-
- /**
- * A simple bar chart demo
- * @version 1.6
- * @author Sami Shaio
- * @modified 06/21/00 Daniel Peek : refactored, comments
- */
- public class BarChart extends java.applet.Applet {
- private static final int VERTICAL = 0;
- private static final int HORIZONTAL = 1;
-
- private static final int SOLID = 0;
- private static final int STRIPED = 1;
-
- private int orientation;
- private String title;
- private Font font;
- private FontMetrics metrics;
- private int fontHeight = 15;
- private int columns;
- private int values[];
- private Color colors[];
- private String labels[];
- private int styles[];
- private int scale = 10;
- private int maxLabelWidth = 0;
- private int barSpacing = 10;
- private int maxValue = 0;
-
- public void init() {
-
- getSettings();
-
- values = new int[columns];
- labels = new String[columns];
- styles = new int[columns];
- colors = new Color[columns];
-
- for (int i=0; i < columns; i++) {
- parseValue(i);
- parseLabel(i);
- parseStyle(i);
- parseColor(i);
- }
- }
-
- private void getSettings() {
- font = new java.awt.Font("Monospaced", Font.BOLD, 12);
- metrics = getFontMetrics(font);
-
- title = getParameter("title");
- if (title == null) {
- title = "Chart";
- }
-
- String temp = getParameter("columns");
- if (temp == null) {
- columns = 5;
- } else {
- columns = Integer.parseInt(temp);
- }
-
- temp = getParameter("scale");
- if (temp == null) {
- scale = 10;
- } else {
- scale = Integer.parseInt(temp);
- }
-
- temp = getParameter("orientation");
- if (temp == null) {
- orientation = VERTICAL;
- } else if (temp.equalsIgnoreCase("horizontal")) {
- orientation = HORIZONTAL;
- } else {
- orientation = VERTICAL;
- }
- }
-
- private void parseValue(int i) {
- String temp = getParameter("C" + (i+1));
- try {
- values[i] = Integer.parseInt(temp);
- } catch (NumberFormatException e) {
- values[i] = 0;
- } catch (NullPointerException e) {
- values[i] = 0;
- }
- maxValue = Math.max(maxValue, values[i]);
- }
-
- private void parseLabel(int i) {
- String temp = getParameter("C" + (i+1) + "_label");
- if (temp==null) {
- labels[i] = "";
- } else {
- labels[i] = temp;
- }
- maxLabelWidth = Math.max(metrics.stringWidth
- ((String) (labels[i])), maxLabelWidth);
- }
-
- private void parseStyle(int i) {
- String temp = getParameter("C" + (i+1) + "_style");
- if (temp == null || temp.equalsIgnoreCase("solid")) {
- styles[i] = SOLID;
- } else if (temp.equalsIgnoreCase("striped")) {
- styles[i] = STRIPED;
- } else {
- styles[i] = SOLID;
- }
- }
-
- private void parseColor(int i) {
- String temp = getParameter("C" + (i+1) + "_color");
- if (temp != null) {
- temp = temp.toLowerCase();
- if (temp.equals("red")) {
- colors[i] = Color.red;
- } else if (temp.equals("green")) {
- colors[i] = Color.green;
- } else if (temp.equals("blue")) {
- colors[i] = Color.blue;
- } else if (temp.equals("pink")) {
- colors[i] = Color.pink;
- } else if (temp.equals("orange")) {
- colors[i] = Color.orange;
- } else if (temp.equals("magenta")) {
- colors[i] = Color.magenta;
- } else if (temp.equals("cyan")) {
- colors[i] = Color.cyan;
- } else if (temp.equals("white")) {
- colors[i] = Color.white;
- } else if (temp.equals("yellow")) {
- colors[i] = Color.yellow;
- } else if (temp.equals("gray")) {
- colors[i] = Color.gray;
- } else if (temp.equals("darkGray")) {
- colors[i] = Color.darkGray;
- } else {
- colors[i] = Color.gray;
- }
- } else {
- colors[i] = Color.gray;
- }
- }
-
- public void paint(Graphics g) {
- // draw the title centered at the bottom of the bar graph
- g.setColor(Color.black);
- g.setFont(font);
-
- g.drawRect(0, 0, getSize().width - 1, getSize().height - 1);
-
- int titleWidth = metrics.stringWidth(title);
- int cx = Math.max((getSize().width - titleWidth) / 2, 0);
- int cy = getSize().height - metrics.getDescent();
- g.drawString(title, cx, cy);
-
- // draw the bars and their titles
- if(orientation == HORIZONTAL) {
- paintHorizontal(g);
- } else { // VERTICAL
- paintVertical(g);
- }
- }
-
- private void paintHorizontal(Graphics g) {
- // x and y coordinates to draw/write to
- int cx, cy;
- int barHeight = metrics.getHeight();
-
- for (int i = 0; i < columns; i++) {
-
- // set the X coordinate for this bar and label and center it
- int widthOfItems = maxLabelWidth + 3 + (maxValue * scale) + 5
- + metrics.stringWidth(Integer.toString(maxValue));
- cx = Math.max((getSize().width - widthOfItems) / 2, 0);
-
- // set the Y coordinate for this bar and label
- cy = getSize().height - metrics.getDescent() - metrics.getHeight()
- - barSpacing - ((columns - i - 1) * (barSpacing + barHeight));
-
- // draw the label
- g.setColor(Color.black);
- g.drawString(labels[i], cx, cy);
- cx += maxLabelWidth + 3;
-
-
- // draw the shadow
- g.fillRect(cx + 4, cy - barHeight + 4,
- (values[i] * scale), barHeight);
-
- // draw the bar
- g.setColor(colors[i]);
- if (styles[i] == STRIPED) {
- for (int k = 0; k <= values[i] * scale; k += 2) {
- g.drawLine(cx + k, cy - barHeight, cx + k, cy);
- }
- } else { // SOLID
- g.fillRect(cx, cy - barHeight,
- (values[i] * scale) + 1, barHeight + 1);
- }
- cx += (values[i] * scale) + 4;
-
- // draw the value at the end of the bar
- g.setColor(g.getColor().darker());
- g.drawString(Integer.toString(values[i]), cx, cy);
- }
- }
-
- private void paintVertical(Graphics g) {
- int barWidth = maxLabelWidth;
-
- for (int i = 0; i < columns; i++) {
-
- // X coordinate for this label and bar (centered)
- int widthOfItems = (barWidth + barSpacing) * columns - barSpacing;
- int cx = Math.max((getSize().width - widthOfItems) / 2, 0);
- cx += (maxLabelWidth + barSpacing) * i;
-
- // Y coordinate for this label and bar
- int cy = getSize().height - metrics.getHeight()
- - metrics.getDescent() - 4;
-
- // draw the label
- g.setColor(Color.black);
- g.drawString(labels[i], cx, cy);
- cy -= metrics.getHeight() - 3;
-
- // draw the shadow
- g.fillRect(cx + 4, cy - (values[i] * scale) - 4,
- barWidth, (values[i] * scale));
-
- // draw the bar
- g.setColor(colors[i]);
- if (styles[i] == STRIPED) {
- for (int k=0; k <= values[i] * scale; k+=2) {
- g.drawLine(cx, cy - k,
- cx + barWidth, cy - k);
- }
- } else {
- g.fillRect(cx, cy - (values[i] * scale),
- barWidth + 1, (values[i] * scale) + 1);
- }
- cy -= (values[i] * scale) + 5;
-
- // draw the value on top of the bar
- g.setColor(g.getColor().darker());
- g.drawString(Integer.toString(values[i]), cx, cy);
- }
- }
-
- public String getAppletInfo() {
- return "Title: Bar Chart \n"
- + "Author: Sami Shaio \n"
- + "A simple bar chart demo.";
- }
-
- public String[][] getParameterInfo() {
- String[][] info = {
- {"title", "string", "The title of bar graph. Default is 'Chart'"},
- {"scale", "int", "The scale of the bar graph. Default is 10."},
- {"columns", "int", "The number of columns/rows. Default is 5."},
- {"orientation", "{VERTICAL, HORIZONTAL}",
- "The orienation of the bar graph. Default is VERTICAL."},
- {"c#", "int", "Subsitute a number for #. "
- + "The value/size of bar #. Default is 0."},
- {"c#_label", "string", "The label for bar #. "
- + "Default is an empty label."},
- {"c#_style", "{SOLID, STRIPED}", "The style of bar #. "
- + "Default is SOLID."},
- {"c#_color", "{RED, GREEN, BLUE, PINK, ORANGE, MAGENTA, CYAN, "
- + "WHITE, YELLOW, GRAY, DARKGRAY}",
- "The color of bar #. Default is GRAY."}
- };
- return info;
- }
- }
-