Java tutorial
/* GanttProject is an opensource project management tool. License: GPL3 Copyright (C) 2011 GanttProject Team This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ package org.ganttproject.impex.htmlpdf.itext; import com.itextpdf.text.Document; import com.itextpdf.text.Rectangle; import com.itextpdf.text.pdf.PdfTemplate; import com.itextpdf.text.pdf.PdfWriter; import net.sourceforge.ganttproject.GanttExportSettings; import net.sourceforge.ganttproject.chart.ChartModel; import net.sourceforge.ganttproject.chart.TimelineChart; import net.sourceforge.ganttproject.chart.export.ChartDimensions; import net.sourceforge.ganttproject.chart.export.ChartImageVisitor; import org.ganttproject.impex.htmlpdf.fonts.TTFontCache; import java.awt.*; /** * Provides functions for writing charts to PDF writer. * * @author dbarashev (Dmitry Barashev) */ class ChartWriter implements ChartImageVisitor { private final Document myDoc; private final TimelineChart myChart; private final GanttExportSettings myExportSettings; private final PdfWriter myWriter; private final TTFontCache myFontCache; private float myScale; private float myYShift; private PdfTemplate myTemplate; private Graphics2D myGraphics; private final String myCharset; private final FontSubstitutionModel mySubstitutions; ChartWriter(TimelineChart chart, PdfWriter writer, Document doc, GanttExportSettings exportSettings, TTFontCache fontCache, FontSubstitutionModel substitutionModel, String charset) { myChart = chart; myWriter = writer; myDoc = doc; myExportSettings = exportSettings; myFontCache = fontCache; myCharset = charset; mySubstitutions = substitutionModel; } protected ChartModel getModel() { return myChart.getModel(); } void write() { setupChart(myExportSettings); myChart.buildImage(myExportSettings, this); myGraphics.dispose(); myWriter.getDirectContent().addTemplate(myTemplate, myScale, 0, 0, myScale, myDoc.leftMargin(), myYShift); } private Graphics2D getGraphics(ChartDimensions d) { if (myGraphics == null) { myTemplate = myWriter.getDirectContent().createTemplate(d.getFullWidth(), d.getChartHeight()); Rectangle page = myDoc.getPageSize(); final float width = page.getWidth() - myDoc.leftMargin() - myDoc.rightMargin(); final float height = page.getHeight() - myDoc.bottomMargin() - myDoc.topMargin(); final float xscale = width / d.getFullWidth(); final float yscale = height / d.getChartHeight(); myScale = Math.min(xscale, yscale); myYShift = height - d.getChartHeight() * myScale + myDoc.bottomMargin(); myGraphics = myTemplate.createGraphics(d.getFullWidth(), d.getChartHeight(), myFontCache.getFontMapper(mySubstitutions, myCharset)); myGraphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF); } return myGraphics; } protected void setupChart(GanttExportSettings settings) { // myChart.gmyModel.setBounds(myModel.getMaxBounds()); } @Override public void acceptLogo(ChartDimensions d, Image logo) { Graphics2D g = getGraphics(d); g.setBackground(Color.WHITE); g.clearRect(0, 0, d.getTreeWidth(), d.getLogoHeight()); g.drawImage(logo, 0, 0, null); } @Override public void acceptTable(ChartDimensions d, Component header, Component table) { Graphics2D g = getGraphics(d); g.translate(0, d.getLogoHeight()); header.print(g); g.translate(0, d.getTableHeaderHeight()); table.print(g); } @Override public void acceptChart(ChartDimensions d, ChartModel model) { Graphics2D g = getGraphics(d); g.translate(d.getTreeWidth(), -d.getLogoHeight() - d.getTableHeaderHeight()); g.clip(new java.awt.Rectangle(d.getChartWidth(), d.getChartHeight())); model.paint(g); } }