Java tutorial
/******************************************************************************* * Copyright (c) 2007, 2008 Edgar Espina. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * *******************************************************************************/ package net.hydromatic.clapham.chart.draw2d; import java.awt.Dimension; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import net.hydromatic.clapham.chart.AbstractChart; import net.hydromatic.clapham.chart.AbstractChartOptions; import net.hydromatic.clapham.chart.ChartOptions; import net.hydromatic.clapham.graph.Grammar; import net.hydromatic.clapham.graph.NodeType; import org.deved.antlride.ui.AntlrPreferenceConstants; import org.eclipse.draw2d.ColorConstants; import org.eclipse.draw2d.FigureUtilities; import org.eclipse.draw2d.Graphics; import org.eclipse.draw2d.SWTGraphics; import org.eclipse.draw2d.geometry.PointList; import org.eclipse.draw2d.geometry.Rectangle; import org.eclipse.jface.resource.ColorRegistry; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.ImageLoader; import org.eclipse.swt.widgets.Display; public class Draw2dChart extends AbstractChart { private Graphics graphics; // private TracePath tracePath; public Draw2dChart(Grammar grammar) { super(grammar); } public void setGraphics(Graphics graphics) { this.graphics = graphics; graphics.setFont(getDefaultFont()); } private ChartOptions createOptions(Font font) { return new AbstractChartOptions() { public int stringWidth(String text) { int size = FigureUtilities.getTextExtents(text, getDefaultFont()).width + symbolGapWidth() * 6; return size; } public int fontHeight() { int size = FigureUtilities.getTextExtents("A", getDefaultFont()).height; return size; } }; } public ChartOptions createOptions() { return createOptions(getDefaultFont()); } public ChartOptions createOptions(String fontName) { // TODO: create a font throw new UnsupportedOperationException(fontName); } @Override public void draw(String symbolName) { // tracePath = new TracePath(getOptions()); super.draw(symbolName); // int[] colors = { SWT.COLOR_RED, SWT.COLOR_GREEN, SWT.COLOR_BLUE, // SWT.COLOR_CYAN, SWT.COLOR_GRAY, SWT.COLOR_MAGENTA, // SWT.COLOR_YELLOW, SWT.COLOR_DARK_RED, SWT.COLOR_DARK_GREEN, // SWT.COLOR_DARK_BLUE, SWT.COLOR_DARK_CYAN, SWT.COLOR_DARK_GRAY, // SWT.COLOR_DARK_MAGENTA }; // // Color foregroundColor = graphics.getForegroundColor(); // // System.out.println(tracePath); // // Path p = tracePath.first(); // Map<String, Collection<Path>> trace = tracePath.trace(p); // List<Path> pl = new ArrayList<Path>(); // pl.add(p); // pl.addAll(trace.get("alt")); // int c = 0; // int l = Math.min(pl.size(), colors.length); // while (c < l) { // trace = tracePath.trace(pl.get(c)); // Collection<Path> t = trace.get("path"); // System.out.println(c + ". " + pl.get(c) + "->" + t); // graphics.setForegroundColor(Display.getDefault().getSystemColor( // colors[c++])); // graphics.setLineWidth(2); // for (Path path : t) { // path.draw(graphics); // } // // if (trace.get("alt").size() > 0) { // // p = trace.get("alt").iterator().next(); // // } else { // // break; // // } // } // graphics.setForegroundColor(foregroundColor); // graphics.setLineWidth(1); } @Override protected void internalDrawRoundRectangle(int x, int y, int width, int height, int arcWidth, int arcHeight) { Rectangle r = Rectangle.SINGLETON; r.x = x; r.y = y; r.width = width; r.height = height; graphics.drawRoundRectangle(r, arcWidth, arcHeight); } public void drawAndExport(String symbolName, File output) { OutputStream out = null; Dimension size = size(symbolName); Image image = null; GC gc = null; Graphics g = null; try { out = new BufferedOutputStream(new FileOutputStream(output)); image = new Image(Display.getDefault(), size.width, size.height); Color color = JFaceResources.getColorRegistry().get(AntlrPreferenceConstants.EDITOR_BACKGROUND_COLOR); image.setBackground(color == null ? ColorConstants.white : color); gc = new GC(image); g = new SWTGraphics(gc); g.translate(0, 0); setGraphics(g); draw(symbolName); ImageLoader imageLoader = new ImageLoader(); imageLoader.data = new ImageData[] { image.getImageData() }; imageLoader.save(out, SWT.IMAGE_PNG); } catch (FileNotFoundException e) { e.printStackTrace(); } finally { if (g != null) { g.dispose(); } if (gc != null) { gc.dispose(); } if (image != null) { image.dispose(); } if (out != null) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } } } @Override protected void internalDrawArc(int x, int y, int width, int height, int startAngle, int arcAngle) { // tracePath.add(new ArcPath(x, y, width, height, startAngle, arcAngle)); Color foregroundColor = graphics.getForegroundColor(); Color otherColor = JFaceResources.getColorRegistry().get(AntlrPreferenceConstants.EDITOR_OTHERS_COLOR); graphics.setForegroundColor(otherColor); graphics.drawArc(x, y, width, height, startAngle, arcAngle); graphics.setForegroundColor(foregroundColor); } @Override protected void internalDrawArrow(int x1, int y1, int x2, int y2, int[] xpoints, int[] ypoints) { Color foregroundColor = graphics.getForegroundColor(); Color backgroundColor = graphics.getBackgroundColor(); Color fgColor = JFaceResources.getColorRegistry().get(AntlrPreferenceConstants.EDITOR_OTHERS_COLOR); graphics.setForegroundColor(fgColor); internalDrawLine(x1, y1, x2, y2); PointList pointList = new PointList(xpoints.length); for (int i = 0; i < xpoints.length; i++) { pointList.addPoint(xpoints[i], ypoints[i]); } graphics.setBackgroundColor(fgColor); graphics.fillPolygon(pointList); graphics.setBackgroundColor(backgroundColor); graphics.setForegroundColor(foregroundColor); } protected void internalDrawLine(int x1, int y1, int x2, int y2) { Color foregroundColor = graphics.getForegroundColor(); Color fgColor = JFaceResources.getColorRegistry().get(AntlrPreferenceConstants.EDITOR_OTHERS_COLOR); graphics.setForegroundColor(fgColor); graphics.drawLine(x1, y1, x2, y2); graphics.setForegroundColor(foregroundColor); // tracePath.add(new LinePath(x1, y1, x2, y2)); } protected void internalDrawRectangle(int x, int y, int width, int height) { Color foregroundColor = graphics.getForegroundColor(); Color fgColor = JFaceResources.getColorRegistry().get(AntlrPreferenceConstants.EDITOR_OTHERS_COLOR); graphics.setForegroundColor(fgColor); graphics.drawRectangle(x, y, width, height); graphics.setForegroundColor(foregroundColor); } protected void internalDrawString(NodeType nodeType, String name, int x, int y) { ColorRegistry colorRegistry = JFaceResources.getColorRegistry(); String colorKey; if (nodeType == NodeType.TERM) { colorKey = AntlrPreferenceConstants.EDITOR_STRING_COLOR; } else if (nodeType == NodeType.NONTERM) { if (Character.isUpperCase(name.charAt(0))) { colorKey = AntlrPreferenceConstants.EDITOR_LEXER_RULE_COLOR; } else { colorKey = AntlrPreferenceConstants.EDITOR_RULE_COLOR; } } else { colorKey = AntlrPreferenceConstants.EDITOR_OTHERS_COLOR; } // tracePath.add(new LabeledPath(name, x, y)); Color prevColor = graphics.getForegroundColor(); Color color = colorRegistry.get(colorKey); graphics.setForegroundColor(color); graphics.drawString(name, x, y); graphics.setForegroundColor(prevColor); } private org.eclipse.swt.graphics.Font getDefaultFont() { return Display.getDefault().getSystemFont(); } public int fontHeightCorrectness() { return 0; } }