bundles/org.eclipse.test.performance.ui/src/org/eclipse/test/performance/ui/BarGraph.java - platform/eclipse.platform.releng.buildtools - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2009 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.test.performance.ui;

 import java.text.NumberFormat;
 import java.util.ArrayList;
 import java.util.List;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Color;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.widgets.Display;

 public class BarGraph {

 	private static final int MARGIN= 5; // margin on all four sides
 	private static final int BARHEIGHT= 8; // height of bar
 	private static final int GAP= 10; // gap between bars
 	private static final int TGAP= 5; // gap between lines and labels

 	private static final boolean NO_SCALE= true; //

 	// if NO_SCALE is true the following values are used:
 	private static final double RATIO= 0.6; // fraction of width reserved for bar graph; needs tweaking
 	private static final int FROM_END= 20; // a break (//) is shown this far from end of bar
 	private static final int SLANT= 8; // slant of break
 	private static final int GAP2= 5; // width of break

 	private StringBuffer fAreaBuffer;

 	private static class BarItem {

 		String title;
 		double value;
 		String url;
 		String slowdownExpected;
 		boolean significant;

 		BarItem(String t, double[] stats, String u, String slow, boolean sig) {
 			this.title= t;
 			this.value= stats[0]==0 ? 0 : -stats[0] * 100;
 			this.url= u;
 			this.slowdownExpected= slow;
 			this.significant= sig;
 		}
 	}

 	private String fTitle;
 	private List fItems;

 	BarGraph(String title) {
 		this.fTitle= title;
 		this.fItems= new ArrayList();
 	}

 	public void addItem(String name, double[] stats, String url, String slow, boolean significant) {
 		this.fItems.add(new BarItem(name, stats, url, slow, significant));
 	}

 	public int getHeight() {
 		int n= this.fItems.size();
 		int textHeight= 16;
 		int titleHeight= 0;
 		if (this.fTitle != null)
 			titleHeight= textHeight + GAP;
 		return MARGIN + titleHeight + n * (GAP + BARHEIGHT) + GAP + textHeight + MARGIN;
 	}

 	public void paint(Display display, int width, int height, GC gc) {

 		NumberFormat nf= NumberFormat.getInstance();

 		BarItem[] bars= (BarItem[]) this.fItems.toArray(new BarItem[this.fItems.size()]);

 		// draw white background
 		Color bg= display.getSystemColor(SWT.COLOR_WHITE);
 		gc.setBackground(bg);
 		gc.fillRectangle(0, 0, width, height);

 		// determine the widths of the bar and the label areas
 		int w;
 		if (NO_SCALE) {
 			// we use a fixed width
 			w= (int) (RATIO * width);
 		} else {
 			// we calculate the max width
 			int maxNameLength= 0;
 			for (int i= 0; i < bars.length; i++) {
 				Point es= gc.stringExtent(bars[i].title);
 				maxNameLength= Math.max(maxNameLength, es.x);
 			}
 			w= width - maxNameLength - TGAP - 2 * MARGIN;
 		}

 		Color fg= display.getSystemColor(SWT.COLOR_BLACK);

 		int vstart= 0; // start rows here
 		if (this.fTitle != null) {
 			vstart= gc.stringExtent(this.fTitle).y + GAP;
 			gc.drawString(this.fTitle, MARGIN, MARGIN, true); // draw title left aligned
 		}

 		int center= MARGIN + w / 2;
 		int w2= w / 2 - gc.stringExtent("-999.9").x - TGAP; // reserve space //$NON-NLS-1$

 		// determine maximum of values
 		double max= 0.0;
 		for (int i= 0; i < bars.length; i++)
 			max= Math.max(max, Math.abs(bars[i].value));

 		double d;
 		if (NO_SCALE) {
 			d= 25;
 			max= 125;
 		} else {
 			if (max > 400.0) {
 				d= 200;
 			} else if (max > 200.0) {
 				d= 100;
 			} else if (max > 100.0) {
 				d= 50;
 			} else if (max > 50) {
 				d= 25;
 			} else if (max > 25) {
 				d= 10;
 			} else if (max > 10) {
 				d= 5;
 			} else if (max > 5) {
 				d= 2.5;
 			} else {
 				d= 1.0;
 			}
 		}

 		// draw striped background
 		int y= MARGIN + vstart;
 		Color lightblue= new Color(display, 237, 243, 254);
 		gc.setBackground(lightblue);
 		for (int i= 0; i < bars.length; i++)
 			if (i % 2 == 0)
 				gc.fillRectangle(0, y + i * (BARHEIGHT + GAP), width, BARHEIGHT + GAP);

 		// draw grid
 		int yy= y + bars.length * (BARHEIGHT + GAP);
 		gc.drawLine(center, y, center, yy + TGAP);
 		Color grey= display.getSystemColor(SWT.COLOR_GRAY);
 		for (int i= 1; d * i < max; i++) {

 			double xx= d * i;
 			int x= (int) ((xx / max) * w2);

 			gc.setForeground(grey);
 			gc.drawLine(center - x, y, center - x, yy + TGAP);
 			gc.drawLine(center + x, y, center + x, yy + TGAP);

 			gc.setForeground(fg);

 			String s3= nf.format(-xx) + "%"; //$NON-NLS-1$
 			Point es3= gc.stringExtent(s3);
 			gc.drawString(s3, center - x - es3.x / 2, yy + TGAP, true);

 			String s4= nf.format(xx) + "%"; //$NON-NLS-1$
 			Point es4= gc.stringExtent(s4);
 			gc.drawString(s4, center + x - es4.x / 2, yy + TGAP, true);
 		}
 		gc.drawLine(0, yy, w, yy);

 		nf.setMaximumFractionDigits(1);

 		// link color
 		Color blue= display.getSystemColor(SWT.COLOR_BLUE);
 		// draw bars
 //		Color green= display.getSystemColor(SWT.COLOR_GREEN);
 //		Color red= display.getSystemColor(SWT.COLOR_RED);
 		Color green = new Color(display, 95, 191, 95);
 		Color red = new Color(display, 225, 50, 50);
 		Color gray= display.getSystemColor(SWT.COLOR_GRAY);
 		Color yellow= display.getSystemColor(SWT.COLOR_YELLOW);
 		Color white= display.getSystemColor(SWT.COLOR_WHITE);
 		for (int i= 0; i < bars.length; i++) {

 			BarItem bar= bars[i];
 			double delta = bar.value;
 			double orgDelta= delta;

 			boolean clamped= false;
 			if (NO_SCALE) {
 				if (delta > max) {
 					delta= max;
 					clamped= true;
 				} else if (delta < -max) {
 					delta= -max;
 					clamped= true;
 				}
 			}

 			int barLength= (int) (delta / max * w2);

 			if (delta < 0) {
 				if (bar.slowdownExpected != null) {
 					gc.setBackground(gray);
 				} else if (!bar.significant) {
 					gc.setBackground(yellow);
 				} else  {
 					gc.setBackground(red);
 				}
 			} else if (!bar.significant) {
 				gc.setBackground(yellow);
 			} else {
 				gc.setBackground(green);
 			}

 			if (barLength > 0) {
 				gc.fillRectangle(center, y + (GAP / 2), barLength, BARHEIGHT);
 				gc.drawRectangle(center, y + (GAP / 2), barLength, BARHEIGHT);
 			} else if (barLength < 0) {
 				gc.fillRectangle(center+barLength, y + (GAP / 2), -barLength, BARHEIGHT);
 				gc.drawRectangle(center+barLength, y + (GAP / 2), -barLength, BARHEIGHT);
 			}

 			if (clamped) {

 				int h2= (BARHEIGHT + GAP);
 				int x= center + barLength;
 				if (barLength > 0)
 					x-= FROM_END;
 				else
 					x+= FROM_END - GAP2 - SLANT;
 				int[] pts= new int[] { x, y + h2 - 1, x + SLANT, y + 1, x + SLANT + GAP2, y + 1, x + GAP2, y + h2 - 1};
 				if (i % 2 == 0)
 					gc.setBackground(lightblue);
 				else
 					gc.setBackground(white);
 				gc.fillPolygon(pts);
 				gc.drawLine(pts[0], pts[1], pts[2], pts[3]);
 				gc.drawLine(pts[4], pts[5], pts[6], pts[7]);
 			}

 			String label= nf.format(orgDelta);
 			Point labelExtent= gc.stringExtent(label);
 			int labelxpos= center + barLength;
 			int labelvpos= y + (BARHEIGHT + GAP - labelExtent.y) / 2;
 			if (orgDelta > 0.0) {
 				gc.drawString(label, labelxpos + TGAP, labelvpos, true);
 			} else {
 				gc.drawString(label, labelxpos - TGAP - labelExtent.x, labelvpos, true);
 			}

 			int x= MARGIN + w + TGAP;
 			String title= bar.title;
 			boolean hasURL= bar.url != null;
 			Color oldfg= gc.getForeground();
 			if (hasURL) {
 				gc.setForeground(blue);
 				Point e= gc.stringExtent(title);
 				gc.drawLine(x, labelvpos + e.y - 1, x + e.x, labelvpos + e.y - 1);
 			}
 			gc.drawString(title, x, labelvpos, true);
 			if (hasURL)
 				gc.setForeground(oldfg);

 			int y0= y;
 			y+= BARHEIGHT + GAP;

 			if (hasURL) {
 				if (this.fAreaBuffer == null)
 					this.fAreaBuffer= new StringBuffer();
 				this.fAreaBuffer.append("		echo '<area shape=\"RECT\" coords=\"0," + y0 + ',' + width + ',' + y + "\" href=\"" + bar.url + "\">';\n");
 			}
 		}

 		lightblue.dispose();
 		red.dispose();
 		green.dispose();
 	}

 	public String getAreas() {
 		if (this.fAreaBuffer != null) {
 			String s= this.fAreaBuffer.toString();
 			this.fAreaBuffer= null;
 			return s;
 		}
 		return null;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2009 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.test.performance.ui;

	import java.text.NumberFormat;
	import java.util.ArrayList;
	import java.util.List;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Color;
	import org.eclipse.swt.graphics.GC;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.widgets.Display;

	public class BarGraph {

	private static final int MARGIN= 5; // margin on all four sides
	private static final int BARHEIGHT= 8; // height of bar
	private static final int GAP= 10; // gap between bars
	private static final int TGAP= 5; // gap between lines and labels

	private static final boolean NO_SCALE= true; //

	// if NO_SCALE is true the following values are used:
	private static final double RATIO= 0.6; // fraction of width reserved for bar graph; needs tweaking
	private static final int FROM_END= 20; // a break (//) is shown this far from end of bar
	private static final int SLANT= 8; // slant of break
	private static final int GAP2= 5; // width of break

	private StringBuffer fAreaBuffer;

	private static class BarItem {

	String title;
	double value;
	String url;
	String slowdownExpected;
	boolean significant;

	BarItem(String t, double[] stats, String u, String slow, boolean sig) {
	this.title= t;
	this.value= stats[0]==0 ? 0 : -stats[0] * 100;
	this.url= u;
	this.slowdownExpected= slow;
	this.significant= sig;
	}
	}

	private String fTitle;
	private List fItems;

	BarGraph(String title) {
	this.fTitle= title;
	this.fItems= new ArrayList();
	}

	public void addItem(String name, double[] stats, String url, String slow, boolean significant) {
	this.fItems.add(new BarItem(name, stats, url, slow, significant));
	}

	public int getHeight() {
	int n= this.fItems.size();
	int textHeight= 16;
	int titleHeight= 0;
	if (this.fTitle != null)
	titleHeight= textHeight + GAP;
	return MARGIN + titleHeight + n * (GAP + BARHEIGHT) + GAP + textHeight + MARGIN;
	}

	public void paint(Display display, int width, int height, GC gc) {

	NumberFormat nf= NumberFormat.getInstance();

	BarItem[] bars= (BarItem[]) this.fItems.toArray(new BarItem[this.fItems.size()]);

	// draw white background
	Color bg= display.getSystemColor(SWT.COLOR_WHITE);
	gc.setBackground(bg);
	gc.fillRectangle(0, 0, width, height);

	// determine the widths of the bar and the label areas
	int w;
	if (NO_SCALE) {
	// we use a fixed width
	w= (int) (RATIO * width);
	} else {
	// we calculate the max width
	int maxNameLength= 0;
	for (int i= 0; i < bars.length; i++) {
	Point es= gc.stringExtent(bars[i].title);
	maxNameLength= Math.max(maxNameLength, es.x);
	}
	w= width - maxNameLength - TGAP - 2 * MARGIN;
	}

	Color fg= display.getSystemColor(SWT.COLOR_BLACK);

	int vstart= 0; // start rows here
	if (this.fTitle != null) {
	vstart= gc.stringExtent(this.fTitle).y + GAP;
	gc.drawString(this.fTitle, MARGIN, MARGIN, true); // draw title left aligned
	}

	int center= MARGIN + w / 2;
	int w2= w / 2 - gc.stringExtent("-999.9").x - TGAP; // reserve space //$NON-NLS-1$

	// determine maximum of values
	double max= 0.0;
	for (int i= 0; i < bars.length; i++)
	max= Math.max(max, Math.abs(bars[i].value));

	double d;
	if (NO_SCALE) {
	d= 25;
	max= 125;
	} else {
	if (max > 400.0) {
	d= 200;
	} else if (max > 200.0) {
	d= 100;
	} else if (max > 100.0) {
	d= 50;
	} else if (max > 50) {
	d= 25;
	} else if (max > 25) {
	d= 10;
	} else if (max > 10) {
	d= 5;
	} else if (max > 5) {
	d= 2.5;
	} else {
	d= 1.0;
	}
	}

	// draw striped background
	int y= MARGIN + vstart;
	Color lightblue= new Color(display, 237, 243, 254);
	gc.setBackground(lightblue);
	for (int i= 0; i < bars.length; i++)
	if (i % 2 == 0)
	gc.fillRectangle(0, y + i * (BARHEIGHT + GAP), width, BARHEIGHT + GAP);

	// draw grid
	int yy= y + bars.length * (BARHEIGHT + GAP);
	gc.drawLine(center, y, center, yy + TGAP);
	Color grey= display.getSystemColor(SWT.COLOR_GRAY);
	for (int i= 1; d * i < max; i++) {

	double xx= d * i;
	int x= (int) ((xx / max) * w2);

	gc.setForeground(grey);
	gc.drawLine(center - x, y, center - x, yy + TGAP);
	gc.drawLine(center + x, y, center + x, yy + TGAP);

	gc.setForeground(fg);

	String s3= nf.format(-xx) + "%"; //$NON-NLS-1$
	Point es3= gc.stringExtent(s3);
	gc.drawString(s3, center - x - es3.x / 2, yy + TGAP, true);

	String s4= nf.format(xx) + "%"; //$NON-NLS-1$
	Point es4= gc.stringExtent(s4);
	gc.drawString(s4, center + x - es4.x / 2, yy + TGAP, true);
	}
	gc.drawLine(0, yy, w, yy);

	nf.setMaximumFractionDigits(1);

	// link color
	Color blue= display.getSystemColor(SWT.COLOR_BLUE);
	// draw bars
	// Color green= display.getSystemColor(SWT.COLOR_GREEN);
	// Color red= display.getSystemColor(SWT.COLOR_RED);
	Color green = new Color(display, 95, 191, 95);
	Color red = new Color(display, 225, 50, 50);
	Color gray= display.getSystemColor(SWT.COLOR_GRAY);
	Color yellow= display.getSystemColor(SWT.COLOR_YELLOW);
	Color white= display.getSystemColor(SWT.COLOR_WHITE);
	for (int i= 0; i < bars.length; i++) {

	BarItem bar= bars[i];
	double delta = bar.value;
	double orgDelta= delta;

	boolean clamped= false;
	if (NO_SCALE) {
	if (delta > max) {
	delta= max;
	clamped= true;
	} else if (delta < -max) {
	delta= -max;
	clamped= true;
	}
	}

	int barLength= (int) (delta / max * w2);

	if (delta < 0) {
	if (bar.slowdownExpected != null) {
	gc.setBackground(gray);
	} else if (!bar.significant) {
	gc.setBackground(yellow);
	} else {
	gc.setBackground(red);
	}
	} else if (!bar.significant) {
	gc.setBackground(yellow);
	} else {
	gc.setBackground(green);
	}

	if (barLength > 0) {
	gc.fillRectangle(center, y + (GAP / 2), barLength, BARHEIGHT);
	gc.drawRectangle(center, y + (GAP / 2), barLength, BARHEIGHT);
	} else if (barLength < 0) {
	gc.fillRectangle(center+barLength, y + (GAP / 2), -barLength, BARHEIGHT);
	gc.drawRectangle(center+barLength, y + (GAP / 2), -barLength, BARHEIGHT);
	}

	if (clamped) {

	int h2= (BARHEIGHT + GAP);
	int x= center + barLength;
	if (barLength > 0)
	x-= FROM_END;
	else
	x+= FROM_END - GAP2 - SLANT;
	int[] pts= new int[] { x, y + h2 - 1, x + SLANT, y + 1, x + SLANT + GAP2, y + 1, x + GAP2, y + h2 - 1};
	if (i % 2 == 0)
	gc.setBackground(lightblue);
	else
	gc.setBackground(white);
	gc.fillPolygon(pts);
	gc.drawLine(pts[0], pts[1], pts[2], pts[3]);
	gc.drawLine(pts[4], pts[5], pts[6], pts[7]);
	}

	String label= nf.format(orgDelta);
	Point labelExtent= gc.stringExtent(label);
	int labelxpos= center + barLength;
	int labelvpos= y + (BARHEIGHT + GAP - labelExtent.y) / 2;
	if (orgDelta > 0.0) {
	gc.drawString(label, labelxpos + TGAP, labelvpos, true);
	} else {
	gc.drawString(label, labelxpos - TGAP - labelExtent.x, labelvpos, true);
	}

	int x= MARGIN + w + TGAP;
	String title= bar.title;
	boolean hasURL= bar.url != null;
	Color oldfg= gc.getForeground();
	if (hasURL) {
	gc.setForeground(blue);
	Point e= gc.stringExtent(title);
	gc.drawLine(x, labelvpos + e.y - 1, x + e.x, labelvpos + e.y - 1);
	}
	gc.drawString(title, x, labelvpos, true);
	if (hasURL)
	gc.setForeground(oldfg);

	int y0= y;
	y+= BARHEIGHT + GAP;

	if (hasURL) {
	if (this.fAreaBuffer == null)
	this.fAreaBuffer= new StringBuffer();
	this.fAreaBuffer.append(" echo '<area shape=\"RECT\" coords=\"0," + y0 + ',' + width + ',' + y + "\" href=\"" + bar.url + "\">';\n");
	}
	}

	lightblue.dispose();
	red.dispose();
	green.dispose();
	}

	public String getAreas() {
	if (this.fAreaBuffer != null) {
	String s= this.fAreaBuffer.toString();
	this.fAreaBuffer= null;
	return s;
	}
	return null;
	}
	}