dive4elements/gnv-client: gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java comparison

comparison gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 1050:7f3154331bc1

Use the chart size/height to export it to pdf. The chart's aspect ratio keeps alive if the size exceeds the maximum page size (issue290). gnv-artifacts/trunk@1124 c6561f87-3c4e-4783-a992-168aeb5c3f6f

author	Ingo Weinzierl <ingo.weinzierl@intevation.de>
date	Tue, 25 May 2010 15:41:31 +0000
parents	22c18083225e
children	b30361464775

comparison

equal deleted inserted replaced

-:778d86255d76
+:7f3154331bc1
 import com.lowagie.text.Rectangle;
 import com.lowagie.text.pdf.PdfContentByte;
 import com.lowagie.text.pdf.PdfTemplate;
 import com.lowagie.text.pdf.PdfWriter;
+import de.intevation.artifacts.CallContext;
 import de.intevation.artifactdatabase.XMLUtils;
 import de.intevation.gnv.chart.Chart;
 String       pageFormat,
 boolean      landscape,
 float        marginLeft,
 float        marginRight,
 float        marginTop,
-float        marginBottom
+float        marginBottom,
+CallContext  context
 ) {
 log.info("export chart as pdf.");
 if (pageFormat == null)
 pageFormat = DEFAULT_PAGE_SIZE;
+// max size of the chart
 Rectangle page = PageSize.getRectangle(pageFormat);
 int pageWidth  = (int) (page.getRight(marginRight) - page.getLeft(marginLeft));
 int pageHeight = (int) (page.getTop(marginTop) - page.getBottom(marginBottom));
+// the chart width
+int chartWidth  = (Integer) context.getContextValue("chart.width");
+int chartHeight = (Integer) context.getContextValue("chart.height");
+int width  = 0;
+int height = 0;
+if (landscape) {
+width  = pageHeight;
+height = pageWidth;
+}
+else {
+width  = pageWidth;
+height = pageHeight;
+}
+if (chartWidth > width) {
+log.warn("Width of the chart is too big for pdf -> resize it now.");
+double ratio = ((double)width) / chartWidth;
+chartWidth  *= ratio;
+chartHeight *= ratio;
+log.debug("Resized chart to " + chartWidth + "x" + chartHeight);
+}
+if (chartHeight > height) {
+log.warn("Height of the chart is too big for pdf -> resize it now.");
+double ratio = ((double)height) / chartHeight;
+chartWidth  *= ratio;
+chartHeight *= ratio;
+log.debug("Resized chart to " + chartWidth + "x" + chartHeight);
+}
 Document document = null;
 if (landscape) {
 document = new Document(page.rotate());
 log.debug("Create landscape pdf.");
 try {
 PdfWriter writer = PdfWriter.getInstance(document, out);
 document.addSubject(chart.getTitle().getText());
+document.addCreationDate();
+document.open();
+PdfContentByte content  = writer.getDirectContent();
+PdfTemplate template = content.createTemplate(width, height);
+Graphics2D  graphics = template.createGraphics(width, height);
+Rectangle2D area = new Rectangle2D.Double(
+0.0D, 0.0D, chartWidth, chartHeight);
+chart.draw(graphics, area);
+graphics.dispose();
+content.addTemplate(template, marginLeft, marginBottom);
+}
+catch (DocumentException de) {
+log.error("Error while exporting chart to pdf.", de);
+}
+finally {
+document.close();
+}
+}
+/**
+* A method to export <code>JFreeChart</code> histograms as PDF to an
+* <code>OutputStream</code>. Each histogram contained in histograms is
+* drawn to an own page in the resulting pdf.
+*
+* @param out OutputStream
+* @param histograms JFreeChart histograms
+* @param pageFormat String to specify a page format, {@link
+* #DEFAULT_PAGE_SIZE} is used if no pageFormat is given
+* @param landscape If this is true, the pdf is delivered in landscape
+* format
+* @param marginLeft Space to left border
+* @param marginRight Space to right border
+* @param marginTop Space to upper border
+* @param marginBottom Space to lower border
+*/
+public static void exportHistogramsAsPDF(
+OutputStream out,
+Chart[]      histograms,
+String       pageFormat,
+boolean      landscape,
+float        marginLeft,
+float        marginRight,
+float        marginTop,
+float        marginBottom
+) {
+log.info("export histogram as pdf.");
+if (pageFormat == null)
+pageFormat = DEFAULT_PAGE_SIZE;
+Rectangle page = PageSize.getRectangle(pageFormat);
+int pageWidth  =
+(int) (page.getRight(marginRight) - page.getLeft(marginLeft));
+int pageHeight =
+(int) (page.getTop(marginTop) - page.getBottom(marginBottom));
+Document document = null;
+if (landscape) {
+document = new Document(page.rotate());
+log.debug("Create landscape pdf.");
+}
+else
+document = new Document(page);
+try {
+PdfWriter writer = PdfWriter.getInstance(document, out);
 document.addCreationDate();
 document.open();
 PdfContentByte content  = writer.getDirectContent();
 else {
 width  = pageWidth;
 height = pageHeight;
 }
-PdfTemplate template = content.createTemplate(width, height);
-Graphics2D  graphics = template.createGraphics(width, height);
-Rectangle2D area = new Rectangle2D.Double(0.0D, 0.0D,width,height);
-chart.draw(graphics, area);
-graphics.dispose();
-content.addTemplate(template, marginLeft, marginBottom);
-}
-catch (DocumentException de) {
-log.error("Error while exporting chart to pdf.", de);
-}
-finally {
-document.close();
-}
-}
-/**
-* A method to export <code>JFreeChart</code> histograms as PDF to an
-* <code>OutputStream</code>. Each histogram contained in histograms is
-* drawn to an own page in the resulting pdf.
-*
-* @param out OutputStream
-* @param histograms JFreeChart histograms
-* @param pageFormat String to specify a page format, {@link
-* #DEFAULT_PAGE_SIZE} is used if no pageFormat is given
-* @param landscape If this is true, the pdf is delivered in landscape
-* format
-* @param marginLeft Space to left border
-* @param marginRight Space to right border
-* @param marginTop Space to upper border
-* @param marginBottom Space to lower border
-*/
-public static void exportHistogramsAsPDF(
-OutputStream out,
-Chart[]      histograms,
-String       pageFormat,
-boolean      landscape,
-float        marginLeft,
-float        marginRight,
-float        marginTop,
-float        marginBottom
-) {
-log.info("export histogram as pdf.");
-if (pageFormat == null)
-pageFormat = DEFAULT_PAGE_SIZE;
-Rectangle page = PageSize.getRectangle(pageFormat);
-int pageWidth  =
-(int) (page.getRight(marginRight) - page.getLeft(marginLeft));
-int pageHeight =
-(int) (page.getTop(marginTop) - page.getBottom(marginBottom));
-Document document = null;
-if (landscape) {
-document = new Document(page.rotate());
-log.debug("Create landscape pdf.");
-}
-else
-document = new Document(page);
-try {
-PdfWriter writer = PdfWriter.getInstance(document, out);
-document.addCreationDate();
-document.open();
-PdfContentByte content  = writer.getDirectContent();
-int width  = 0;
-int height = 0;
-if (landscape) {
-width  = pageHeight;
-height = pageWidth;
-}
-else {
-width  = pageWidth;
-height = pageHeight;
-}
 int size = histograms.length;
 for (int i = 0; i < size; i++) {
 if (i > 0) {
 document.newPage();
 }

Mercurial > dive4elements > gnv-client

comparison gnv-artifacts/src/main/java/de/intevation/gnv/exports/ChartExportHelper.java @ 1050:7f3154331bc1