Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 1053:6169ddc827ac
The format of a histogram pdf depends on the width and height specified by the user - or the default size (issue290).
gnv-artifacts/trunk@1127 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Wed, 26 May 2010 07:00:55 +0000 |
| parents | b30361464775 |
| children | 0318fda0001e |
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| 1052:b30361464775 | 1053:6169ddc827ac |
|---|---|
| 337 */ | 337 */ |
| 338 public static void exportHistogramsAsPDF( | 338 public static void exportHistogramsAsPDF( |
| 339 OutputStream out, | 339 OutputStream out, |
| 340 Chart[] histograms, | 340 Chart[] histograms, |
| 341 String pageFormat, | 341 String pageFormat, |
| 342 boolean landscape, | |
| 343 float marginLeft, | 342 float marginLeft, |
| 344 float marginRight, | 343 float marginRight, |
| 345 float marginTop, | 344 float marginTop, |
| 346 float marginBottom | 345 float marginBottom, |
| 346 CallContext context | |
| 347 ) { | 347 ) { |
| 348 log.info("export histogram as pdf."); | 348 log.info("export histogram as pdf."); |
| 349 | 349 |
| 350 if (pageFormat == null) | 350 if (pageFormat == null) |
| 351 pageFormat = DEFAULT_PAGE_SIZE; | 351 pageFormat = DEFAULT_PAGE_SIZE; |
| 354 int pageWidth = | 354 int pageWidth = |
| 355 (int) (page.getRight(marginRight) - page.getLeft(marginLeft)); | 355 (int) (page.getRight(marginRight) - page.getLeft(marginLeft)); |
| 356 int pageHeight = | 356 int pageHeight = |
| 357 (int) (page.getTop(marginTop) - page.getBottom(marginBottom)); | 357 (int) (page.getTop(marginTop) - page.getBottom(marginBottom)); |
| 358 | 358 |
| 359 // the chart width | |
| 360 int chartWidth = (Integer) context.getContextValue("chart.width"); | |
| 361 int chartHeight = (Integer) context.getContextValue("chart.height"); | |
| 362 | |
| 363 boolean landscape = chartWidth > chartHeight ? true : false; | |
| 364 | |
| 365 int width = 0; | |
| 366 int height = 0; | |
| 367 if (landscape) { | |
| 368 width = pageHeight; | |
| 369 height = pageWidth; | |
| 370 } | |
| 371 else { | |
| 372 width = pageWidth; | |
| 373 height = pageHeight; | |
| 374 } | |
| 375 | |
| 376 if (chartWidth > width) { | |
| 377 log.warn("Histogram width is too big for pdf -> resize it now."); | |
| 378 double ratio = ((double)width) / chartWidth; | |
| 379 chartWidth *= ratio; | |
| 380 chartHeight *= ratio; | |
| 381 log.debug("Resized histogram to " + chartWidth + "x" + chartHeight); | |
| 382 } | |
| 383 | |
| 384 if (chartHeight > height) { | |
| 385 log.warn("Histogram height is too big for pdf -> resize it now."); | |
| 386 double ratio = ((double)height) / chartHeight; | |
| 387 chartWidth *= ratio; | |
| 388 chartHeight *= ratio; | |
| 389 log.debug("Resized histogram to " + chartWidth + "x" + chartHeight); | |
| 390 } | |
| 391 | |
| 359 Document document = null; | 392 Document document = null; |
| 360 if (landscape) { | 393 if (landscape) { |
| 361 document = new Document(page.rotate()); | 394 document = new Document(page.rotate()); |
| 362 log.debug("Create landscape pdf."); | 395 log.debug("Create landscape pdf."); |
| 363 } | 396 } |
| 369 | 402 |
| 370 document.addCreationDate(); | 403 document.addCreationDate(); |
| 371 document.open(); | 404 document.open(); |
| 372 | 405 |
| 373 PdfContentByte content = writer.getDirectContent(); | 406 PdfContentByte content = writer.getDirectContent(); |
| 374 | |
| 375 int width = 0; | |
| 376 int height = 0; | |
| 377 if (landscape) { | |
| 378 width = pageHeight; | |
| 379 height = pageWidth; | |
| 380 } | |
| 381 else { | |
| 382 width = pageWidth; | |
| 383 height = pageHeight; | |
| 384 } | |
| 385 | 407 |
| 386 int size = histograms.length; | 408 int size = histograms.length; |
| 387 for (int i = 0; i < size; i++) { | 409 for (int i = 0; i < size; i++) { |
| 388 if (i > 0) { | 410 if (i > 0) { |
| 389 document.newPage(); | 411 document.newPage(); |
| 390 } | 412 } |
| 391 | 413 |
| 392 JFreeChart chart = histograms[i].generateChart(); | 414 JFreeChart chart = histograms[i].generateChart(); |
| 393 PdfTemplate template = content.createTemplate(width, height); | 415 PdfTemplate template = content.createTemplate(width, height); |
| 394 Graphics2D graphics = template.createGraphics(width, height); | 416 Graphics2D graphics = template.createGraphics( |
| 417 chartWidth, chartHeight); | |
| 395 Rectangle2D area = new Rectangle2D.Double( | 418 Rectangle2D area = new Rectangle2D.Double( |
| 396 0.0D, 0.0D,width,height); | 419 0.0D, 0.0D,width,height); |
| 397 | 420 |
| 398 chart.draw(graphics, area); | 421 chart.draw(graphics, area); |
| 399 graphics.dispose(); | 422 graphics.dispose(); |
| 400 content.addTemplate(template, marginLeft, marginBottom); | 423 content.addTemplate(template, marginLeft, marginBottom); |
| 401 } | 424 } |
| 402 } | 425 } |
| 403 catch (DocumentException de) { | 426 catch (DocumentException de) { |
| 404 log.error("Error while exporting chart to pdf.", de); | 427 log.error("Error while exporting histogram to pdf.", de); |
| 405 } | 428 } |
| 406 finally { | 429 finally { |
| 407 document.close(); | 430 document.close(); |
| 408 } | 431 } |
| 409 } | 432 } |