1 /******************************************************************************* 2 * Copyright (c) 2000, 2009 IBM Corporation and others. 3 * All rights reserved. This program and the accompanying materials 4 * are made available under the terms of the Eclipse Public License v1.0 5 * which accompanies this distribution, and is available at 6 * http://www.eclipse.org/legal/epl-v10.html 7 * 8 * Contributors: 9 * IBM Corporation - initial API and implementation 10 *******************************************************************************/ 11 package org.eclipse.test.performance.ui; 12 13 import java.util.*; 14 15 import org.eclipse.swt.graphics.Color; 16 import org.eclipse.swt.graphics.GC; 17 import org.eclipse.swt.graphics.Image; 18 import org.eclipse.swt.graphics.Point; 19 import org.eclipse.swt.graphics.Rectangle; 20 import org.eclipse.test.internal.performance.data.Dim; 21 22 public class LineGraph { 23 24 StringBuffer fAreaBuffer; 25 26 private static class GraphItem { 27 28 String title; 29 String description=null; 30 double value; 31 Color color; 32 boolean displayDescription=false; 33 34 GraphItem(String title, String description,double value, Color color,boolean display) { 35 this(title, description, value, color); 36 this.displayDescription=display; 37 } 38 39 GraphItem(String title, String description, double value, Color color) { 40 this.title= title; 41 this.value= value; 42 this.color= color; 43 this.description= description; 44 } 45 46 Point getSize(GC g) { 47 Point e1= g.stringExtent(this.description); 48 Point e2= g.stringExtent(this.title); 49 return new Point(Math.max(e1.x, e2.x), e1.y+e2.y); 50 } 51 } 52 53 static final int PADDING= 15; 54 55 56 String fTitle; 57 List fItems; 58 Dim fDimension; 59 60 61 public LineGraph(String title, Dim dim) { 62 this.fTitle= title; 63 this.fItems= new ArrayList(); 64 this.fDimension= dim; 65 } 66 67 public void paint(Image im) { 68 69 Rectangle bounds= im.getBounds(); 70 71 GC g= new GC(im); 72 73 Point ee= g.stringExtent(this.fTitle); 74 int titleHeight= ee.y; 75 76 double maxItem= getMaxItem(); 77 double minItem= getMinItem(); 78 79 int max= (int) (Math.ceil(maxItem * (maxItem < 0 ? 0.9 : 1.2))); 80 int min= (int) (Math.floor(minItem * (minItem < 0 ? 1.2 : 0.9))); 81 82 String smin= this.fDimension.getDisplayValue(min); 83 Point emin= g.stringExtent(smin); 84 85 String smax= this.fDimension.getDisplayValue(max); 86 Point emax= g.stringExtent(smax); 87 88 int labelWidth= Math.max(emin.x, emax.x) + 2; 89 90 int top= PADDING; 91 int bottom= bounds.height - titleHeight - PADDING; 92 int left= PADDING + labelWidth; 93 94 GraphItem lastItem= (GraphItem) this.fItems.get(this.fItems.size()-1); 95 int right= bounds.width - lastItem.getSize(g).x - PADDING/2; 96 97 // draw the title 98 //g.drawString(fTitle, (bounds.width - titleWidth) / 2, titleHeight, true); 99 100 // draw the max and min values 101 g.drawString(smin, PADDING/2+labelWidth-emin.x, bottom-titleHeight, true); 102 g.drawString(smax, PADDING/2+labelWidth-emax.x, top, true); 103 104 // draw the vertical and horizontal lines 105 g.drawLine(left, top, left, bottom); 106 g.drawLine(left, bottom, right, bottom); 107 108 Color oldbg= g.getBackground(); 109 Color oldfg= g.getForeground(); 110 111 int n= this.fItems.size(); 112 int xincrement= n > 1 ? (right-left) / (n-1) : 0; 113 114 int graduations= max - min; 115 if (graduations == 0) 116 graduations= 1; 117 118 int lastx= 0; 119 int lasty= 0; 120 121 int xposition= left; 122 123 for (int i= 0; i < n; i++) { 124 GraphItem thisItem= (GraphItem) this.fItems.get(i); 125 126 int yposition= (int) (bottom - (((thisItem.value-min) * (bottom-top)) / graduations)); 127 128 if (i > 0) // don't draw for first segment 129 g.drawLine(lastx, lasty, xposition, yposition); 130 131 g.setBackground(thisItem.color); 132 g.setForeground(thisItem.color); 133 g.fillOval(xposition-2, yposition-2, 5, 5); 134 135 if (this.fAreaBuffer == null) 136 this.fAreaBuffer= new StringBuffer(); 137 138 this.fAreaBuffer.append("\r<area shape=\"CIRCLE\" coords=\""+(xposition-2)+','+(yposition-2)+','+5+" alt=\""+ thisItem.title+": "+thisItem.description+"\""+ " title=\""+ thisItem.title+": "+thisItem.description+"\">"); 139 140 141 int shift; 142 if (i > 0 && yposition < lasty) 143 shift= 3; // below dot 144 else 145 shift= -(2*titleHeight+3); // above dot 146 if (thisItem.displayDescription){ 147 g.drawString(thisItem.title, xposition+2, yposition+shift, true); 148 g.drawString(thisItem.description, xposition+2, yposition+shift+titleHeight, true); 149 } 150 g.setBackground(oldbg); 151 g.setForeground(oldfg); 152 153 lastx= xposition; 154 lasty= yposition; 155 xposition+= xincrement; 156 } 157 158 g.dispose(); 159 } 160 161 public void addItem(String name, String description, double value, Color col) { 162 addItem(name, description, value, col,false); 163 } 164 165 public void addItem(String name, String description, double value, Color col, boolean display) { 166 this.fItems.add(new GraphItem(name, description, value, col,display)); 167 } 168 169 public double getMaxItem() { 170 double maxItem= 0; 171 for (int i= 0; i < this.fItems.size(); i++) { 172 GraphItem graphItem= (GraphItem) this.fItems.get(i); 173 if (graphItem.value > maxItem) 174 maxItem= graphItem.value; 175 } 176 if (maxItem == 0) 177 return 1; 178 return maxItem; 179 } 180 181 public double getMinItem() { 182 double minItem= getMaxItem(); 183 for (int i= 0; i < this.fItems.size(); i++) { 184 GraphItem graphItem= (GraphItem) this.fItems.get(i); 185 if (graphItem.value < minItem) 186 minItem= graphItem.value; 187 } 188 if (minItem == 0) 189 return -1; 190 return minItem; 191 } 192 public String getAreas() { 193 if (this.fAreaBuffer != null) { 194 String s= this.fAreaBuffer.toString(); 195 this.fAreaBuffer= null; 196 return s; 197 } 198 return null; 199 } 200 } 201
