Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 1087:92fce3b3d07f
Centered histograms in pdf exports.
gnv-artifacts/trunk@1189 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
|---|---|
| date | Thu, 10 Jun 2010 09:23:33 +0000 |
| parents | f2127cd0fe31 |
| children | f953c9a559d8 |
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| 1086:f2127cd0fe31 | 1087:92fce3b3d07f |
|---|---|
| 357 | 357 |
| 358 if (pageFormat == null) | 358 if (pageFormat == null) |
| 359 pageFormat = DEFAULT_PAGE_SIZE; | 359 pageFormat = DEFAULT_PAGE_SIZE; |
| 360 | 360 |
| 361 Rectangle page = PageSize.getRectangle(pageFormat); | 361 Rectangle page = PageSize.getRectangle(pageFormat); |
| 362 int pageWidth = | 362 float pageWidth = page.getWidth(); |
| 363 (int) (page.getRight(marginRight) - page.getLeft(marginLeft)); | 363 float pageHeight = page.getHeight(); |
| 364 int pageHeight = | |
| 365 (int) (page.getTop(marginTop) - page.getBottom(marginBottom)); | |
| 366 | 364 |
| 367 // the chart width | 365 // the chart width |
| 368 int chartWidth = (Integer) context.getContextValue("chart.width"); | 366 int chartWidth = (Integer) context.getContextValue("chart.width"); |
| 369 int chartHeight = (Integer) context.getContextValue("chart.height"); | 367 int chartHeight = (Integer) context.getContextValue("chart.height"); |
| 370 | 368 |
| 371 boolean landscape = chartWidth > chartHeight ? true : false; | 369 boolean landscape = chartWidth > chartHeight ? true : false; |
| 372 | 370 |
| 373 int width = 0; | 371 float width = 0; |
| 374 int height = 0; | 372 float height = 0; |
| 375 if (landscape) { | 373 if (landscape) { |
| 376 width = pageHeight; | 374 width = pageHeight; |
| 377 height = pageWidth; | 375 height = pageWidth; |
| 378 } | 376 } |
| 379 else { | 377 else { |
| 380 width = pageWidth; | 378 width = pageWidth; |
| 381 height = pageHeight; | 379 height = pageHeight; |
| 382 } | 380 } |
| 383 | 381 |
| 384 if (chartWidth > width) { | 382 float spaceX = width - marginLeft - marginRight; |
| 383 if (chartWidth > spaceX) { | |
| 385 log.warn("Histogram width is too big for pdf -> resize it now."); | 384 log.warn("Histogram width is too big for pdf -> resize it now."); |
| 386 double ratio = ((double)width) / chartWidth; | 385 double ratio = ((double)spaceX) / chartWidth; |
| 387 chartWidth *= ratio; | 386 chartWidth *= ratio; |
| 388 chartHeight *= ratio; | 387 chartHeight *= ratio; |
| 389 log.debug("Resized histogram to " + chartWidth + "x" + chartHeight); | 388 log.debug("Resized chart to " + chartWidth + "x" + chartHeight); |
| 390 } | 389 } |
| 391 | 390 |
| 392 if (chartHeight > height) { | 391 float spaceY = height - marginTop - marginBottom; |
| 392 if (chartHeight > spaceY) { | |
| 393 log.warn("Histogram height is too big for pdf -> resize it now."); | 393 log.warn("Histogram height is too big for pdf -> resize it now."); |
| 394 double ratio = ((double)height) / chartHeight; | 394 double ratio = ((double)spaceY) / chartHeight; |
| 395 chartWidth *= ratio; | 395 chartWidth *= ratio; |
| 396 chartHeight *= ratio; | 396 chartHeight *= ratio; |
| 397 log.debug("Resized histogram to " + chartWidth + "x" + chartHeight); | 397 log.debug("Resized chart to " + chartWidth + "x" + chartHeight); |
| 398 } | 398 } |
| 399 | 399 |
| 400 Document document = null; | 400 Document document = null; |
| 401 if (landscape) { | 401 if (landscape) { |
| 402 document = new Document(page.rotate()); | 402 document = new Document(page.rotate()); |
| 419 document.newPage(); | 419 document.newPage(); |
| 420 } | 420 } |
| 421 | 421 |
| 422 JFreeChart chart = histograms[i].generateChart(); | 422 JFreeChart chart = histograms[i].generateChart(); |
| 423 PdfTemplate template = content.createTemplate(width, height); | 423 PdfTemplate template = content.createTemplate(width, height); |
| 424 Graphics2D graphics = template.createGraphics( | 424 Graphics2D graphics = template.createGraphics(width, height); |
| 425 | |
| 426 double[] origin = getCenteredAnchor( | |
| 427 marginLeft, marginRight, marginBottom, marginTop, | |
| 428 width, height, | |
| 425 chartWidth, chartHeight); | 429 chartWidth, chartHeight); |
| 430 | |
| 426 Rectangle2D area = new Rectangle2D.Double( | 431 Rectangle2D area = new Rectangle2D.Double( |
| 427 0.0D, 0.0D, chartWidth, chartHeight); | 432 origin[0], origin[1], chartWidth, chartHeight); |
| 428 | 433 |
| 429 chart.draw(graphics, area); | 434 chart.draw(graphics, area); |
| 430 graphics.dispose(); | 435 graphics.dispose(); |
| 431 content.addTemplate(template, marginLeft, marginBottom); | 436 content.addTemplate(template, 0f, 0f); |
| 432 } | 437 } |
| 433 } | 438 } |
| 434 catch (DocumentException de) { | 439 catch (DocumentException de) { |
| 435 log.error("Error while exporting histogram to pdf.", de); | 440 log.error("Error while exporting histogram to pdf.", de); |
| 436 } | 441 } |