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CHART.SRC
资源名称：ertos.rar [点击查看]
上传用户：sunrenlu
上传日期：2022-06-13
资源大小：1419k
文件大小：17k
源码类别：
操作系统开发
开发平台：
DOS
- /*
- * @(#)Chart.java 1.6f 95/03/27 Sami Shaio
- *
- * Copyright (c) 1994-1995 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and
- * without fee is hereby granted.
- * Please refer to the file http://java.sun.com/copy_trademarks.html
- * for further important copyright and trademark information and to
- * http://java.sun.com/licensing.html for further important licensing
- * information for the Java (tm) Technology.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- *
- * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
- * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
- * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
- * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
- * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
- * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
- * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). SUN
- * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
- * HIGH RISK ACTIVITIES.
- */
- import java.awt.Graphics;
- import java.awt.Color;
- import java.awt.Font;
- import java.awt.FontMetrics;
- import java.io.*;
- import java.lang.*;
- import java.net.URL;
- public class Chart extends java.applet.Applet {
- static final int VERTICAL = 0;
- static final int HORIZONTAL = 1;
- static final int SOLID = 0;
- static final int STRIPED = 1;
- int orientation;
- String title;
- Font titleFont;
- FontMetrics titleFontMetrics;
- int titleHeight = 15;
- int columns;
- int values[];
- Object colors[];
- Object labels[];
- int styles[];
- int scale = 10;
- int maxLabelWidth = 0;
- int barWidth;
- int barSpacing = 10;
- int max = 0;
- public synchronized void init() {
- String rs;
- titleFont = new java.awt.Font("Courier", Font.BOLD, 12);
- titleFontMetrics = getFontMetrics(titleFont);
- title = getParameter("title");
- if (title == null) {
- title = "Chart";
- }
- rs = getParameter("columns");
- if (rs == null) {
- columns = 5;
- } else {
- columns = Integer.parseInt(rs);
- }
- rs = getParameter("scale");
- if (rs == null) {
- scale = 10;
- } else {
- scale = Integer.parseInt(rs);
- }
- rs = getParameter("orientation");
- if (rs == null) {
- orientation = VERTICAL;
- } else if (rs.toLowerCase().equals("vertical")) {
- orientation = VERTICAL;
- } else if (rs.toLowerCase().equals("horizontal")) {
- orientation = HORIZONTAL;
- } else {
- orientation = VERTICAL;
- }
- values = new int[columns];
- colors = new Color[columns];
- labels = new String[columns];
- styles = new int[columns];
- for (int i=0; i < columns; i++) {
- // parse the value for this column
- rs = getParameter("C" + (i+1));
- if (rs != null) {
- try {
- values[i] = Integer.parseInt(rs);
- } catch (NumberFormatException e) {
- values[i] = 0;
- }
- }
- if (values[i] > max) {
- max = values[i];
- }
- // parse the label for this column
- rs = getParameter("C" + (i+1) + "_label");
- labels[i] = (rs == null) ? "" : rs;
- maxLabelWidth = Math.max(titleFontMetrics.stringWidth((String)(labels[i])),
- maxLabelWidth);
- // parse the bar style
- rs = getParameter("C" + (i+1) + "_style");
- if (rs == null || rs.toLowerCase().equals("solid")) {
- styles[i] = SOLID;
- } else if (rs.toLowerCase().equals("striped")) {
- styles[i] = STRIPED;
- } else {
- styles[i] = SOLID;
- }
- // parse the color attribute for this column
- rs = getParameter("C" + (i+1) + "_color");
- if (rs != null) {
- if (rs.equals("red")) {
- colors[i] = Color.red;
- } else if (rs.equals("green")) {
- colors[i] = Color.green;
- } else if (rs.equals("blue")) {
- colors[i] = Color.blue;
- } else if (rs.equals("pink")) {
- colors[i] = Color.pink;
- } else if (rs.equals("orange")) {
- colors[i] = Color.orange;
- } else if (rs.equals("magenta")) {
- colors[i] = Color.magenta;
- } else if (rs.equals("cyan")) {
- colors[i] = Color.cyan;
- } else if (rs.equals("white")) {
- colors[i] = Color.white;
- } else if (rs.equals("yellow")) {
- colors[i] = Color.yellow;
- } else if (rs.equals("gray")) {
- colors[i] = Color.gray;
- } else if (rs.equals("darkGray")) {
- colors[i] = Color.darkGray;
- } else {
- colors[i] = Color.gray;
- }
- } else {
- colors[i] = Color.gray;
- }
- }
- switch (orientation) {
- case VERTICAL:
- default:
- barWidth = maxLabelWidth;
- resize(Math.max(columns * (barWidth + barSpacing),
- titleFontMetrics.stringWidth(title)) +
- titleFont.getSize() + 5,
- (max * scale) + (2 * titleFont.getSize()) + 5 + titleFont.getSize());
- break;
- case HORIZONTAL:
- barWidth = titleFont.getSize();
- resize(Math.max((max * scale) + titleFontMetrics.stringWidth("" + max),
- titleFontMetrics.stringWidth(title)) + maxLabelWidth + 5,
- (columns * (barWidth + barSpacing)) + titleFont.getSize() + 10);
- break;
- }
- }
- public synchronized void paint(Graphics g) {
- int i, j;
- int cx, cy;
- char l[] = new char[1];
- // draw the title centered at the bottom of the bar graph
- g.setColor(Color.black);
- i = titleFontMetrics.stringWidth(title);
- g.setFont(titleFont);
- g.drawString(title, Math.max((size().width - i)/2, 0),
- size().height - titleFontMetrics.getDescent());
- for (i=0; i < columns; i++) {
- switch (orientation) {
- case VERTICAL:
- default:
- // set the next X coordinate to account for the label
- // being wider than the bar size().width.
- cx = (Math.max((barWidth + barSpacing),maxLabelWidth) * i) +
- barSpacing;
- // center the bar chart
- cx += Math.max((size().width - (columns *
- (barWidth + (2 * barSpacing))))/2,0);
- // set the next Y coordinate to account for the size().height
- // of the bar as well as the title and labels painted
- // at the bottom of the chart.
- cy = size().height - (values[i] * scale) - 1 - (2 * titleFont.getSize());
- // draw the label
- g.setColor(Color.black);
- g.drawString((String)labels[i], cx,
- size().height - titleFont.getSize() - titleFontMetrics.getDescent());
- // draw the shadow bar
- if (colors[i] == Color.black) {
- g.setColor(Color.gray);
- }
- g.fillRect(cx + 5, cy - 3, barWidth, (values[i] * scale));
- // draw the bar with the specified color
- g.setColor((Color)(colors[i]));
- switch (styles[i]) {
- case SOLID:
- default:
- g.fillRect(cx, cy, barWidth, (values[i] * scale));
- break;
- case STRIPED:
- {
- int steps = (values[i] * scale) / 2;
- int ys;
- for (j=0; j < steps; j++) {
- ys = cy + (2 * j);
- g.drawLine(cx, ys, cx + barWidth, ys);
- }
- }
- break;
- }
- g.drawString("" + values[i],
- cx,
- cy - titleFontMetrics.getDescent());
- break;
- case HORIZONTAL:
- // set the Y coordinate
- cy = ((barWidth + barSpacing) * i) + barSpacing;
- // set the X coordinate to be the size().width of the widest
- // label
- cx = maxLabelWidth + 1;
- cx += Math.max((size().width - (maxLabelWidth + 1 +
- titleFontMetrics.stringWidth("" +
- max) +
- (max * scale))) / 2, 0);
- // draw the labels and the shadow
- g.setColor(Color.black);
- g.drawString((String)labels[i], cx - maxLabelWidth - 1,
- cy + titleFontMetrics.getAscent());
- if (colors[i] == Color.black) {
- g.setColor(Color.gray);
- }
- g.fillRect(cx + 3,
- cy + 5,
- (values[i] * scale),
- barWidth);
- // draw the bar in the current color
- g.setColor((Color)(colors[i]));
- switch (styles[i]) {
- case SOLID:
- default:
- g.fillRect(cx,
- cy,
- (values[i] * scale),
- barWidth);
- break;
- case STRIPED:
- {
- int steps = (values[i] * scale) / 2;
- int ys;
- for (j=0; j < steps; j++) {
- ys = cx + (2 * j);
- g.drawLine(ys, cy, ys, cy + barWidth);
- }
- }
- break;
- }
- g.drawString("" + values[i],
- cx + (values[i] * scale) + 3,
- cy + titleFontMetrics.getAscent());
- break;
- }
- }
- }
- }
