Source Code Cross Referenced for BarChart.java in  » IDE-Netbeans » cvsclient » org » netbeans » lib » profiler » ui » charts » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » IDE Netbeans » cvsclient » org.netbeans.lib.profiler.ui.charts 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003:         *
004:         * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005:         *
006:         * The contents of this file are subject to the terms of either the GNU
007:         * General Public License Version 2 only ("GPL") or the Common
008:         * Development and Distribution License("CDDL") (collectively, the
009:         * "License"). You may not use this file except in compliance with the
010:         * License. You can obtain a copy of the License at
011:         * http://www.netbeans.org/cddl-gplv2.html
012:         * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013:         * specific language governing permissions and limitations under the
014:         * License.  When distributing the software, include this License Header
015:         * Notice in each file and include the License file at
016:         * nbbuild/licenses/CDDL-GPL-2-CP.  Sun designates this
017:         * particular file as subject to the "Classpath" exception as provided
018:         * by Sun in the GPL Version 2 section of the License file that
019:         * accompanied this code. If applicable, add the following below the
020:         * License Header, with the fields enclosed by brackets [] replaced by
021:         * your own identifying information:
022:         * "Portions Copyrighted [year] [name of copyright owner]"
023:         *
024:         * Contributor(s):
025:         * The Original Software is NetBeans. The Initial Developer of the Original
026:         * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
027:         * Microsystems, Inc. All Rights Reserved.
028:         *
029:         * If you wish your version of this file to be governed by only the CDDL
030:         * or only the GPL Version 2, indicate your decision by adding
031:         * "[Contributor] elects to include this software in this distribution
032:         * under the [CDDL or GPL Version 2] license." If you do not indicate a
033:         * single choice of license, a recipient has the option to distribute
034:         * your version of this file under either the CDDL, the GPL Version 2 or
035:         * to extend the choice of license to its licensees as provided above.
036:         * However, if you add GPL Version 2 code and therefore, elected the GPL
037:         * Version 2 license, then the option applies only if the new code is
038:         * made subject to such option by the copyright holder.
039:         */
040:
041:        package org.netbeans.lib.profiler.ui.charts;
042:
043:        import java.awt.BasicStroke;
044:        import java.awt.Color;
045:        import java.awt.Dimension;
046:        import java.awt.Font;
047:        import java.awt.Graphics;
048:        import java.awt.Graphics2D;
049:        import java.awt.Image;
050:        import java.awt.Insets;
051:        import java.awt.Paint;
052:        import java.awt.Polygon;
053:        import java.awt.RenderingHints;
054:        import java.awt.Stroke;
055:        import java.awt.event.ComponentEvent;
056:        import java.awt.event.ComponentListener;
057:        import java.util.LinkedList;
058:        import java.util.List;
059:        import javax.accessibility.Accessible;
060:        import javax.accessibility.AccessibleContext;
061:        import javax.swing.BorderFactory;
062:        import javax.swing.JComponent;
063:        import javax.swing.JFrame;
064:        import javax.swing.SwingUtilities;
065:        import javax.swing.event.AncestorEvent;
066:        import javax.swing.event.AncestorListener;
067:
068:        /**
069:         *
070:         * @author Jiri Sedlacek
071:         */
072:        public class BarChart extends JComponent implements  ComponentListener,
073:                AncestorListener, ChartModelListener, Accessible {
074:            //~ Instance fields ----------------------------------------------------------------------------------------------------------
075:
076:            List horizAxisXes = new LinkedList();
077:            int horizAxisHeight = 0;
078:            int horizLegendWidth = 0;
079:            int vertAxisWidth = 0;
080:            int vertLegendHeight = 0;
081:            private AccessibleContext accessibleContext;
082:            private BarChartModel model;
083:            private Graphics2D offScreenGraphics;
084:            private Image offScreenImage;
085:            private Insets insets;
086:            private Paint axisMeshPaint = new Color(80, 80, 80, 50);
087:            private Paint axisPaint = Color.BLACK;
088:            private Paint fillPaint = Color.CYAN;
089:            private Paint outlinePaint = Color.BLACK;
090:            private Stroke axisStroke = new BasicStroke(1f);
091:            private Stroke outlineStroke = new BasicStroke(1f,
092:                    BasicStroke.CAP_SQUARE, BasicStroke.JOIN_ROUND);
093:            private boolean draw3D = false;
094:            private boolean modelIncorrect = true;
095:            private boolean offScreenImageInvalid;
096:            private boolean offScreenImageSizeInvalid;
097:            private int drawHeight;
098:            private int drawWidth;
099:            private int leftOffset = 0;
100:            private int maxHeight;
101:            private int rightOffset = 0;
102:            private int topOffset = 0;
103:            private int xSpacing = 0;
104:
105:            //~ Constructors -------------------------------------------------------------------------------------------------------------
106:
107:            /** Creates a new instance of BarChart */
108:            public BarChart() {
109:                offScreenImageSizeInvalid = true;
110:                addAncestorListener(this );
111:                addComponentListener(this );
112:            }
113:
114:            //~ Methods ------------------------------------------------------------------------------------------------------------------
115:
116:            public void setAccessibleContext(AccessibleContext accessibleContext) {
117:                this .accessibleContext = accessibleContext;
118:            }
119:
120:            public AccessibleContext getAccessibleContext() {
121:                return accessibleContext;
122:            }
123:
124:            // --- Public interface ------------------------------------------------------
125:            public void setDraw3D(boolean draw3D) {
126:                if (this .draw3D != draw3D) {
127:                    this .draw3D = draw3D;
128:                    chartDataChanged();
129:                }
130:            }
131:
132:            public boolean getDraw3D() {
133:                return draw3D;
134:            }
135:
136:            public void setFillPaint(Paint fillPaint) {
137:                if (!this .fillPaint.equals(fillPaint)) {
138:                    this .fillPaint = fillPaint;
139:                    chartDataChanged();
140:                }
141:            }
142:
143:            public Paint getFillPaint() {
144:                return fillPaint;
145:            }
146:
147:            public void setFont(Font font) {
148:                if (!getFont().equals(font)) {
149:                    super .setFont(font);
150:                    chartDataChanged();
151:                }
152:            }
153:
154:            public void setLeftOffset(int leftOffset) {
155:                if (this .leftOffset != leftOffset) {
156:                    this .leftOffset = leftOffset;
157:                    chartDataChanged();
158:                }
159:            }
160:
161:            public int getLeftOffset() {
162:                return leftOffset;
163:            }
164:
165:            public void setModel(BarChartModel model) {
166:                // automatically unregister itself as a ChartModelListener from current model
167:                if (this .model != null) {
168:                    this .model.removeChartModelListener(this );
169:                }
170:
171:                // automatically register itself as a ChartModelListener for new model
172:                if (model != null) {
173:                    model.addChartModelListener(this );
174:                }
175:
176:                // set new model
177:                this .model = model;
178:
179:                // process data change
180:                chartDataChanged();
181:            }
182:
183:            public BarChartModel getModel() {
184:                return model;
185:            }
186:
187:            public void setOutlinePaint(Paint outlinePaint) {
188:                if (!this .outlinePaint.equals(outlinePaint)) {
189:                    this .outlinePaint = outlinePaint;
190:                    chartDataChanged();
191:                }
192:            }
193:
194:            public Paint getOutlinePaint() {
195:                return outlinePaint;
196:            }
197:
198:            public void setOutlineStroke(Stroke outlineStroke) {
199:                if (!this .outlineStroke.equals(outlineStroke)) {
200:                    this .outlineStroke = outlineStroke;
201:                    chartDataChanged();
202:                }
203:            }
204:
205:            public Stroke getOutlineStroke() {
206:                return outlineStroke;
207:            }
208:
209:            public void setRightOffset(int rightOffset) {
210:                if (this .rightOffset != rightOffset) {
211:                    this .rightOffset = rightOffset;
212:                    chartDataChanged();
213:                }
214:            }
215:
216:            public int getRightOffset() {
217:                return rightOffset;
218:            }
219:
220:            public void setTopOffset(int topOffset) {
221:                if (this .topOffset != topOffset) {
222:                    this .topOffset = topOffset;
223:                    chartDataChanged();
224:                }
225:            }
226:
227:            public int getTopOffset() {
228:                return topOffset;
229:            }
230:
231:            public void setXSpacing(int xSpacing) {
232:                if (this .xSpacing != xSpacing) {
233:                    this .xSpacing = xSpacing;
234:                    chartDataChanged();
235:                }
236:            }
237:
238:            public int getXSpacing() {
239:                return xSpacing;
240:            }
241:
242:            public void ancestorAdded(AncestorEvent event) {
243:                chartDataChanged();
244:            }
245:
246:            public void ancestorMoved(AncestorEvent event) {
247:            }
248:
249:            public void ancestorRemoved(AncestorEvent event) {
250:            }
251:
252:            // Used for public chart update & listener implementation
253:            public void chartDataChanged() {
254:                if (model != null) {
255:                    // assume model is incorrect
256:                    modelIncorrect = true;
257:
258:                    // check model correctness
259:                    String[] xItems = model.getXLabels();
260:                    int[] yItems = model.getYValues();
261:
262:                    if (xItems == null) {
263:                        throw new RuntimeException("X labels cannot be null!"); // NOI18N
264:                    }
265:
266:                    if (yItems == null) {
267:                        throw new RuntimeException("Y values cannot be null!"); // NOI18N
268:                    }
269:
270:                    if ((xItems.length - 1) != yItems.length) {
271:                        throw new RuntimeException(
272:                                "Incorrect x-y values count!"); // NOI18N
273:                    }
274:
275:                    // model is correct
276:                    modelIncorrect = false;
277:
278:                    // update max yvalue
279:                    maxHeight = getMaxY(yItems);
280:
281:                    // update axes metrics
282:                    if ((getFont() != null) && (getGraphics() != null)
283:                            && (getGraphics().getFontMetrics() != null)) {
284:                        horizAxisHeight = getFont().getSize() + 10;
285:                        horizLegendWidth = (int) getGraphics().getFontMetrics()
286:                                .getStringBounds(model.getXAxisDesc(),
287:                                        getGraphics()).getWidth();
288:
289:                        int maxYMarkWidth = (int) getGraphics()
290:                                .getFontMetrics().getStringBounds(
291:                                        Integer.toString(maxHeight) + "0",
292:                                        getGraphics()).getWidth() + 10;
293:                        int vertLegendWidth = (int) getGraphics()
294:                                .getFontMetrics().getStringBounds(
295:                                        model.getYAxisDesc(), getGraphics())
296:                                .getWidth();
297:                        vertLegendHeight = getFont().getSize();
298:                        vertAxisWidth = Math.max(maxYMarkWidth,
299:                                vertLegendWidth + 4);
300:                    } else {
301:                        horizAxisHeight = 0;
302:                        horizLegendWidth = 0;
303:                        vertAxisWidth = 0;
304:                    }
305:                }
306:
307:                // paintComponent() may be running and would clear offScreenImageInvalid flag,
308:                // so this code has to be invoked later
309:                SwingUtilities.invokeLater(new Runnable() {
310:                    public void run() {
311:                        offScreenImageInvalid = true;
312:                        repaint();
313:                    }
314:                });
315:            }
316:
317:            public void componentHidden(ComponentEvent e) {
318:            }
319:
320:            public void componentMoved(ComponentEvent e) {
321:            }
322:
323:            public void componentResized(ComponentEvent e) {
324:                offScreenImageSizeInvalid = true;
325:                repaint();
326:            }
327:
328:            // ---------------------------------------------------------------------------
329:
330:            // --- ComponentListener & AncestorListener implementation ---------------------
331:            public void componentShown(ComponentEvent e) {
332:            }
333:
334:            // ---------------------------------------------------------------------------
335:
336:            // --- Static tester ---------------------------------------------------------
337:
338:            /**
339:             * @param args the command line arguments
340:             */
341:            public static void main(String[] args) {
342:                BarChart barChart = new BarChart();
343:
344:                BarChartModel barChartModel = new AbstractBarChartModel() {
345:                    public String[] getXLabels() {
346:                        return new String[] { "37", "41", "45", "49", "53",
347:                                "57" };
348:                    } // NOI18N
349:
350:                    public String getXAxisDesc() {
351:                        return "[ms]";
352:                    } // NOI18N
353:
354:                    public String getYAxisDesc() {
355:                        return "[freq]";
356:                    } // NOI18N
357:
358:                    public int[] getYValues() {
359:                        return new int[] { 55, 60, 90, 80, 10 };
360:                    }
361:                };
362:
363:                barChart.setModel(barChartModel);
364:
365:                barChart.setBackground(Color.WHITE);
366:                barChart.setBorder(BorderFactory.createEmptyBorder(10, 10, 10,
367:                        10));
368:                barChart.setPreferredSize(new Dimension(300, 200));
369:
370:                barChart.setDraw3D(true);
371:                barChart.setLeftOffset(20);
372:                barChart.setRightOffset(5);
373:                barChart.setTopOffset(30);
374:                barChart.setXSpacing(10);
375:
376:                JFrame frame = new JFrame("BarChart Tester"); // NOI18N
377:                frame.getContentPane().add(barChart);
378:                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
379:                frame.pack();
380:                frame.setVisible(true);
381:            }
382:
383:            // ---------------------------------------------------------------------------
384:
385:            // --- Internal implementation -----------------------------------------------
386:            public void paintComponent(Graphics g) {
387:                // super.paintComponent
388:                super .paintComponent(g);
389:
390:                // check if ChartModel is assigned
391:                if ((model == null) || modelIncorrect) {
392:                    return;
393:                }
394:
395:                // check if the offScreenImage has to be updated
396:                if (offScreenImageSizeInvalid) {
397:                    updateOffScreenImageSize();
398:                }
399:
400:                // paint component to the offScreenImage
401:                if (offScreenImageInvalid) {
402:                    drawChart(offScreenGraphics);
403:                }
404:
405:                // paint offScreenImage to the output Graphics
406:                g.drawImage(offScreenImage, insets.left, insets.top, this );
407:            }
408:
409:            protected void drawBar(Graphics2D g2, int startX, int startY,
410:                    int width, int height) {
411:                Polygon topSide = null;
412:                Polygon rightSide = null;
413:
414:                g2.setPaint(fillPaint);
415:                g2.fillRect(startX, startY, width, height);
416:
417:                if (draw3D) {
418:                    topSide = new Polygon();
419:                    topSide.addPoint(startX, startY);
420:                    topSide
421:                            .addPoint(startX + (width / 3), startY
422:                                    - (width / 3));
423:                    topSide.addPoint(startX + width + (width / 3), startY
424:                            - (width / 3));
425:                    topSide.addPoint(startX + width, startY);
426:
427:                    rightSide = new Polygon();
428:                    rightSide.addPoint(startX + width, startY);
429:                    rightSide.addPoint(startX + width + (width / 3), startY
430:                            - (width / 3));
431:                    rightSide.addPoint(startX + width + (width / 3),
432:                            (startY + height) - (width / 3));
433:                    rightSide.addPoint(startX + width, startY + height);
434:
435:                    if (fillPaint instanceof  Color) {
436:                        g2.setPaint(((Color) fillPaint).brighter());
437:                    }
438:
439:                    g2.fillPolygon(topSide);
440:
441:                    if (fillPaint instanceof  Color) {
442:                        g2.setPaint(((Color) fillPaint).darker());
443:                    }
444:
445:                    g2.fillPolygon(rightSide);
446:                }
447:
448:                g2.setStroke(outlineStroke);
449:                g2.setPaint(outlinePaint);
450:                g2.drawRect(startX, startY, width, height);
451:
452:                if (draw3D) {
453:                    g2.drawPolygon(topSide);
454:                    g2.drawPolygon(rightSide);
455:                }
456:            }
457:
458:            protected void drawChart(Graphics2D g2) {
459:                // clear component area
460:                g2.setColor(getBackground());
461:                g2.fillRect(0, 0, drawWidth + 1, drawHeight + 1);
462:
463:                // fetch data from model
464:                String[] xItems = model.getXLabels();
465:                int[] yItems = model.getYValues();
466:
467:                // process only if data available and component has valid size
468:                if ((yItems.length > 0) && (drawWidth > 0) && (drawHeight > 0)) {
469:                    // default outline stroke
470:                    int outlineStrokeWidth = 0;
471:
472:                    // most likely stroke will be descendant of BasicStroke, set correct stroke width
473:                    if (outlineStroke instanceof  BasicStroke) {
474:                        outlineStrokeWidth = (int) Math
475:                                .ceil((((BasicStroke) outlineStroke)
476:                                        .getLineWidth() - 1) / 2);
477:                    }
478:
479:                    // initialize basic scene description
480:                    int barsCount = yItems.length; // number of bars to be drawn
481:                    int drawableWidth = drawWidth // effective width of drawing area
482:                            - vertAxisWidth // width of vertical axis
483:                            - horizLegendWidth // width of horizontal axis legend
484:                            - leftOffset // extra left spacing (between vertical axis and first bar)
485:                            - rightOffset // extra right spacing (betweel last bar and end of horizontal axis)
486:                            - (barsCount * xSpacing) // spacing between bars + one more before horizontal axis legend
487:                            - ((horizLegendWidth == 0) ? 0 : 5) // extra space before horizontal axis legend
488:                            - (outlineStrokeWidth * 2); // effective stroke width
489:                    int drawableHeight = drawHeight // effective height of drawing area
490:                            - topOffset // extra top spacing (between highest bar and end of vertical axis)
491:                            - horizAxisHeight // height of horizontal axis
492:                            - (outlineStrokeWidth * 2); // effective stroke width
493:
494:                    // initialize drawing status
495:                    int drawnWidth = 0;
496:                    int horizontal3DCorrection = 0;
497:                    int vertical3DCorrection = 0;
498:                    int currentX = vertAxisWidth + leftOffset
499:                            + outlineStrokeWidth;
500:                    horizAxisXes.clear();
501:
502:                    if (draw3D) {
503:                        horizontal3DCorrection = drawableWidth / barsCount / 3;
504:                        drawableWidth -= horizontal3DCorrection;
505:                        vertical3DCorrection = drawableWidth / barsCount / 3;
506:                        drawableHeight -= vertical3DCorrection;
507:                    }
508:
509:                    // draw vertical chart axis
510:                    drawVerticalAxis(g2, vertical3DCorrection, yItems);
511:
512:                    // draw each bar
513:                    for (int i = 0; i < barsCount; i++) {
514:                        int width = (int) ((drawableWidth - drawnWidth) / (barsCount - i));
515:                        int height = (int) ((drawableHeight * yItems[i]) / (float) maxHeight);
516:                        int horizLegendX = ((i == 0) ? Math.max(currentX
517:                                - (xSpacing / 2), vertAxisWidth)
518:                                : (currentX - (xSpacing / 2)));
519:                        drawBar(g2, currentX, drawHeight - horizAxisHeight
520:                                - height - outlineStrokeWidth, width, height);
521:                        horizAxisXes.add(new Integer(horizLegendX));
522:                        currentX += (width + xSpacing);
523:                        drawnWidth += width;
524:                    }
525:
526:                    horizAxisXes.add(new Integer(Math.min(currentX
527:                            - (xSpacing / 2), drawWidth)));
528:
529:                    // draw horizontal chart axis
530:                    drawHorizontalAxis(g2, horizAxisXes, xItems);
531:                }
532:
533:                // offScreen image is now valid
534:                offScreenImageInvalid = false;
535:            }
536:
537:            protected void drawHorizontalAxis(Graphics2D g2, List horizAxisXes,
538:                    String[] xItems) {
539:                g2.setPaint(axisPaint);
540:                g2.setStroke(axisStroke);
541:
542:                g2.drawLine(vertAxisWidth - 3, drawHeight - horizAxisHeight,
543:                        drawWidth, drawHeight - horizAxisHeight);
544:
545:                for (int i = 0; i < horizAxisXes.size(); i++) {
546:                    int x = ((Integer) horizAxisXes.get(i)).intValue();
547:                    g2.drawLine(x, drawHeight - horizAxisHeight + 1, x,
548:                            drawHeight - horizAxisHeight + 3);
549:                    drawHorizontalAxisLegendItem(g2, x, xItems[i]);
550:                }
551:
552:                g2.drawString(model.getXAxisDesc(), drawWidth
553:                        - horizLegendWidth - 2, drawHeight - 5);
554:            }
555:
556:            protected void drawHorizontalAxisLegendItem(Graphics2D g2, int x,
557:                    String string) {
558:                int legendWidth = (int) g2.getFontMetrics().getStringBounds(
559:                        string, g2).getWidth();
560:                int legendX = Math.min(x - (legendWidth / 2), drawWidth
561:                        - legendWidth - horizLegendWidth - 3);
562:                g2.drawString(string, legendX, drawHeight - 5);
563:            }
564:
565:            protected void drawVerticalAxis(Graphics2D g2,
566:                    int vertical3DCorrection, int[] yItems) {
567:                g2.setPaint(axisPaint);
568:                g2.setStroke(axisStroke);
569:
570:                g2.drawLine(vertAxisWidth, 0, vertAxisWidth, drawHeight
571:                        - horizAxisHeight);
572:
573:                double factor = (double) (drawHeight - horizAxisHeight
574:                        - topOffset - vertical3DCorrection)
575:                        / (double) (maxHeight);
576:                long optimalUnits = DecimalAxisUtils
577:                        .getOptimalUnits(factor, 30);
578:
579:                long firstMark = 0;
580:                long currentMark = firstMark;
581:                int markPosition = drawHeight - horizAxisHeight
582:                        - (int) (currentMark * factor);
583:
584:                while (markPosition >= (vertLegendHeight + 5)) {
585:                    g2.setPaint(axisPaint);
586:                    g2.setStroke(axisStroke);
587:                    g2.drawLine(vertAxisWidth - 3, markPosition,
588:                            vertAxisWidth - 1, markPosition);
589:
590:                    drawVerticalAxisLegendItem(g2, markPosition, Long
591:                            .toString(currentMark));
592:
593:                    g2.setPaint(axisMeshPaint);
594:                    g2.drawLine(vertAxisWidth, markPosition, vertAxisWidth
595:                            + drawWidth, markPosition);
596:
597:                    currentMark += optimalUnits;
598:                    markPosition = drawHeight - horizAxisHeight
599:                            - (int) (currentMark * factor);
600:                }
601:
602:                g2.setPaint(axisPaint);
603:                g2.drawString(model.getYAxisDesc(), 2, vertLegendHeight);
604:            }
605:
606:            protected void drawVerticalAxisLegendItem(Graphics2D g2, int y,
607:                    String string) {
608:                int legendWidth = (int) g2.getFontMetrics().getStringBounds(
609:                        string, g2).getWidth();
610:                int legendHeight = vertLegendHeight;
611:                int legendX = vertAxisWidth - legendWidth - 5;
612:                int legendY = Math.max((y + (legendHeight / 2)) - 2,
613:                        (2 * legendHeight) + 3);
614:                g2.drawString(string, legendX, legendY);
615:            }
616:
617:            protected void updateOffScreenImageSize() {
618:                insets = getInsets();
619:
620:                drawWidth = getWidth() - insets.left - insets.right;
621:                drawHeight = getHeight() - insets.top - insets.bottom - 1;
622:
623:                offScreenImage = createImage(drawWidth + 1, drawHeight + 1);
624:                offScreenGraphics = (Graphics2D) offScreenImage.getGraphics();
625:
626:                offScreenGraphics.setRenderingHint(
627:                        RenderingHints.KEY_ANTIALIASING,
628:                        RenderingHints.VALUE_ANTIALIAS_ON);
629:
630:                offScreenImageSizeInvalid = false;
631:                offScreenImageInvalid = true;
632:            }
633:
634:            private int getMaxY(int[] yItems) {
635:                int max = Integer.MIN_VALUE;
636:
637:                for (int i = 0; i < yItems.length; i++) {
638:                    if (max < yItems[i]) {
639:                        max = yItems[i];
640:                    }
641:                }
642:
643:                return max;
644:            }
645:
646:            // ---------------------------------------------------------------------------
647:        }
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