/* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.activiti.image.impl;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Point;
import java.awt.Polygon;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.font.FontRenderContext;
import java.awt.font.LineBreakMeasurer;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.geom.AffineTransform;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Path2D;
import java.awt.geom.PathIterator;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
import org.activiti.bpmn.model.AssociationDirection;
import org.activiti.bpmn.model.GraphicInfo;
import org.activiti.image.exception.ActivitiImageException;
import org.activiti.image.util.ReflectUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Represents a canvas on which BPMN 2.0 constructs can be drawn.
*
* Some of the icons used are licensed under a Creative Commons Attribution 2.5
* License, see http://www.famfamfam.com/lab/icons/silk/
*
* @see org.activiti.engine.impl.bpmn.diagram.DefaultProcessDiagramGenerator
* @author Joram Barrez
*/
public class DefaultProcessDiagramCanvas {
protected static final Logger LOGGER = LoggerFactory.getLogger(DefaultProcessDiagramCanvas.class);
public enum SHAPE_TYPE {Rectangle, Rhombus, Ellipse}
// Predefined sized
protected static final int ARROW_WIDTH = 5;
protected static final int CONDITIONAL_INDICATOR_WIDTH = 16;
protected static final int DEFAULT_INDICATOR_WIDTH = 10;
protected static final int MARKER_WIDTH = 12;
protected static final int FONT_SIZE = 11;
protected static final int FONT_SPACING = 2;
protected static final int TEXT_PADDING = 3;
protected static final int ANNOTATION_TEXT_PADDING = 7;
protected static final int LINE_HEIGHT = FONT_SIZE + FONT_SPACING;
// Colors
protected static Color TASK_BOX_COLOR = new Color(249, 249, 249);
protected static Color SUBPROCESS_BOX_COLOR = new Color(255, 255, 255);
protected static Color EVENT_COLOR = new Color(255, 255, 255);
protected static Color CONNECTION_COLOR = new Color(88, 88, 88);
protected static Color CONDITIONAL_INDICATOR_COLOR = new Color(255, 255, 255);
protected static Color HIGHLIGHT_COLOR = Color.RED;
protected static Color LABEL_COLOR = new Color(112, 146, 190);
protected static Color TASK_BORDER_COLOR = new Color(187, 187, 187);
protected static Color EVENT_BORDER_COLOR = new Color(88, 88, 88);
protected static Color SUBPROCESS_BORDER_COLOR = new Color(0, 0, 0);
// Fonts
protected static Font LABEL_FONT = null;
protected static Font ANNOTATION_FONT = new Font("Arial", Font.PLAIN, FONT_SIZE);
protected static Font TASK_FONT = new Font("Arial", Font.PLAIN, FONT_SIZE);
// Strokes
protected static Stroke THICK_TASK_BORDER_STROKE = new BasicStroke(3.0f);
protected static Stroke GATEWAY_TYPE_STROKE = new BasicStroke(3.0f);
protected static Stroke END_EVENT_STROKE = new BasicStroke(3.0f);
protected static Stroke MULTI_INSTANCE_STROKE = new BasicStroke(1.3f);
protected static Stroke EVENT_SUBPROCESS_STROKE = new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1.0f, new float[] { 1.0f }, 0.0f);
protected static Stroke NON_INTERRUPTING_EVENT_STROKE = new BasicStroke(1.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1.0f, new float[] { 4.0f, 3.0f }, 0.0f);
protected static Stroke HIGHLIGHT_FLOW_STROKE = new BasicStroke(1.3f);
protected static Stroke ANNOTATION_STROKE = new BasicStroke(2.0f);
protected static Stroke ASSOCIATION_STROKE = new BasicStroke(2.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 1.0f, new float[] { 2.0f, 2.0f }, 0.0f);
// icons
protected static int ICON_PADDING = 5;
protected static BufferedImage USERTASK_IMAGE;
protected static BufferedImage SCRIPTTASK_IMAGE;
protected static BufferedImage SERVICETASK_IMAGE;
protected static BufferedImage RECEIVETASK_IMAGE;
protected static BufferedImage SENDTASK_IMAGE;
protected static BufferedImage MANUALTASK_IMAGE;
protected static BufferedImage BUSINESS_RULE_TASK_IMAGE;
protected static BufferedImage SHELL_TASK_IMAGE;
protected static BufferedImage MULE_TASK_IMAGE;
protected static BufferedImage CAMEL_TASK_IMAGE;
protected static BufferedImage TIMER_IMAGE;
protected static BufferedImage ERROR_THROW_IMAGE;
protected static BufferedImage ERROR_CATCH_IMAGE;
protected static BufferedImage MESSAGE_THROW_IMAGE;
protected static BufferedImage MESSAGE_CATCH_IMAGE;
protected static BufferedImage SIGNAL_CATCH_IMAGE;
protected static BufferedImage SIGNAL_THROW_IMAGE;
protected int canvasWidth = -1;
protected int canvasHeight = -1;
protected int minX = -1;
protected int minY = -1;
protected BufferedImage processDiagram;
protected Graphics2D g;
protected FontMetrics fontMetrics;
protected boolean closed;
protected ClassLoader customClassLoader;
protected String activityFontName = "Arial";
protected String labelFontName = "Arial";
/**
* Creates an empty canvas with given width and height.
*
* Allows to specify minimal boundaries on the left and upper side of the
* canvas. This is useful for diagrams that have white space there.
* Everything beneath these minimum values will be cropped.
* It's also possible to pass a specific font name and a class loader for the icon images.
*
*/
public DefaultProcessDiagramCanvas(int width, int height, int minX, int minY, String imageType,
String activityFontName, String labelFontName, ClassLoader customClassLoader) {
this.canvasWidth = width;
this.canvasHeight = height;
this.minX = minX;
this.minY = minY;
if (activityFontName != null) {
this.activityFontName = activityFontName;
}
if (labelFontName != null) {
this.labelFontName = labelFontName;
}
this.customClassLoader = customClassLoader;
initialize(imageType);
}
/**
* Creates an empty canvas with given width and height.
*
* Allows to specify minimal boundaries on the left and upper side of the
* canvas. This is useful for diagrams that have white space there (eg
* Signavio). Everything beneath these minimum values will be cropped.
*
* @param minX
* Hint that will be used when generating the image. Parts that fall
* below minX on the horizontal scale will be cropped.
* @param minY
* Hint that will be used when generating the image. Parts that fall
* below minX on the horizontal scale will be cropped.
*/
public DefaultProcessDiagramCanvas(int width, int height, int minX, int minY, String imageType) {
this.canvasWidth = width;
this.canvasHeight = height;
this.minX = minX;
this.minY = minY;
initialize(imageType);
}
public void initialize(String imageType) {
if ("png".equalsIgnoreCase(imageType)) {
this.processDiagram = new BufferedImage(canvasWidth, canvasHeight, BufferedImage.TYPE_INT_ARGB);
} else {
this.processDiagram = new BufferedImage(canvasWidth, canvasHeight, BufferedImage.TYPE_INT_RGB);
}
this.g = processDiagram.createGraphics();
if ("png".equalsIgnoreCase(imageType) == false) {
this.g.setBackground(new Color(255, 255, 255, 0));
this.g.clearRect(0, 0, canvasWidth, canvasHeight);
}
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setPaint(Color.black);
Font font = new Font(activityFontName, Font.BOLD, FONT_SIZE);
g.setFont(font);
this.fontMetrics = g.getFontMetrics();
LABEL_FONT = new Font(labelFontName, Font.ITALIC, 10);
try {
USERTASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/userTask.png", customClassLoader));
SCRIPTTASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/scriptTask.png", customClassLoader));
SERVICETASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/serviceTask.png", customClassLoader));
RECEIVETASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/receiveTask.png", customClassLoader));
SENDTASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/sendTask.png", customClassLoader));
MANUALTASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/manualTask.png", customClassLoader));
BUSINESS_RULE_TASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/businessRuleTask.png", customClassLoader));
SHELL_TASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/shellTask.png", customClassLoader));
CAMEL_TASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/camelTask.png", customClassLoader));
MULE_TASK_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/muleTask.png", customClassLoader));
TIMER_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/timer.png", customClassLoader));
ERROR_THROW_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/error-throw.png", customClassLoader));
ERROR_CATCH_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/error.png", customClassLoader));
MESSAGE_THROW_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/message-throw.png", customClassLoader));
MESSAGE_CATCH_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/message.png", customClassLoader));
SIGNAL_THROW_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/signal-throw.png", customClassLoader));
SIGNAL_CATCH_IMAGE = ImageIO.read(ReflectUtil.getResourceAsStream("org/activiti/icons/signal.png", customClassLoader));
} catch (IOException e) {
LOGGER.warn("Could not load image for process diagram creation: {}", e.getMessage());
}
}
/**
* Generates an image of what currently is drawn on the canvas.
*
* Throws an {@link ActivitiException} when {@link #close()} is already
* called.
*/
public InputStream generateImage(String imageType) {
if (closed) {
throw new ActivitiImageException("ProcessDiagramGenerator already closed");
}
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
// Try to remove white space
minX = (minX <= 5) ? 5 : minX;
minY = (minY <= 5) ? 5 : minY;
BufferedImage imageToSerialize = processDiagram;
if (minX >= 0 && minY >= 0) {
imageToSerialize = processDiagram.getSubimage(minX - 5, minY - 5, canvasWidth - minX + 5, canvasHeight - minY + 5);
}
ImageIO.write(imageToSerialize, imageType, out);
} catch (IOException e) {
throw new ActivitiImageException("Error while generating process image", e);
} finally {
try {
if (out != null) {
out.close();
}
} catch(IOException ignore) {
// Exception is silently ignored
}
}
return new ByteArrayInputStream(out.toByteArray());
}
/**
* Generates an image of what currently is drawn on the canvas.
*
* Throws an {@link ActivitiException} when {@link #close()} is already
* called.
*/
public BufferedImage generateBufferedImage(String imageType) {
if (closed) {
throw new ActivitiImageException("ProcessDiagramGenerator already closed");
}
// Try to remove white space
minX = (minX <= 5) ? 5 : minX;
minY = (minY <= 5) ? 5 : minY;
BufferedImage imageToSerialize = processDiagram;
if (minX >= 0 && minY >= 0) {
imageToSerialize = processDiagram.getSubimage(minX - 5, minY - 5, canvasWidth - minX + 5, canvasHeight - minY + 5);
}
return imageToSerialize;
}
/**
* Closes the canvas which dissallows further drawing and releases graphical
* resources.
*/
public void close() {
g.dispose();
closed = true;
}
public void drawNoneStartEvent(GraphicInfo graphicInfo) {
drawStartEvent(graphicInfo, null, 1.0);
}
public void drawTimerStartEvent(GraphicInfo graphicInfo, double scaleFactor) {
drawStartEvent(graphicInfo, TIMER_IMAGE, scaleFactor);
}
public void drawSignalStartEvent(GraphicInfo graphicInfo, double scaleFactor) {
drawStartEvent(graphicInfo, SIGNAL_CATCH_IMAGE, scaleFactor);
}
public void drawStartEvent(GraphicInfo graphicInfo, BufferedImage image, double scaleFactor) {
Paint originalPaint = g.getPaint();
g.setPaint(EVENT_COLOR);
Ellipse2D circle = new Ellipse2D.Double(graphicInfo.getX(), graphicInfo.getY(),
graphicInfo.getWidth(), graphicInfo.getHeight());
g.fill(circle);
g.setPaint(EVENT_BORDER_COLOR);
g.draw(circle);
g.setPaint(originalPaint);
if (image != null) {
g.drawImage(image, (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 4)),
(int) (graphicInfo.getY() + (graphicInfo.getHeight() / 4)),
(int) (image.getWidth() / scaleFactor), (int) (image.getHeight() / scaleFactor), null);
}
}
public void drawNoneEndEvent(GraphicInfo graphicInfo, double scaleFactor) {
Paint originalPaint = g.getPaint();
Stroke originalStroke = g.getStroke();
g.setPaint(EVENT_COLOR);
Ellipse2D circle = new Ellipse2D.Double(graphicInfo.getX(), graphicInfo.getY(),
graphicInfo.getWidth(), graphicInfo.getHeight());
g.fill(circle);
g.setPaint(EVENT_BORDER_COLOR);
if (scaleFactor == 1.0) {
g.setStroke(END_EVENT_STROKE);
} else {
g.setStroke(new BasicStroke(2.0f));
}
g.draw(circle);
g.setStroke(originalStroke);
g.setPaint(originalPaint);
}
public void drawErrorEndEvent(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawErrorEndEvent(graphicInfo, scaleFactor);
if (scaleFactor == 1.0) {
drawLabel(name, graphicInfo);
}
}
public void drawErrorEndEvent(GraphicInfo graphicInfo, double scaleFactor) {
drawNoneEndEvent(graphicInfo, scaleFactor);
g.drawImage(ERROR_THROW_IMAGE, (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 4)),
(int) (graphicInfo.getY() + (graphicInfo.getHeight() / 4)),
(int) (ERROR_THROW_IMAGE.getWidth() / scaleFactor),
(int) (ERROR_THROW_IMAGE.getHeight() / scaleFactor), null);
}
public void drawErrorStartEvent(GraphicInfo graphicInfo, double scaleFactor) {
drawNoneStartEvent(graphicInfo);
g.drawImage(ERROR_CATCH_IMAGE, (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 4)),
(int) (graphicInfo.getY() + (graphicInfo.getHeight() / 4)),
(int) (ERROR_CATCH_IMAGE.getWidth() / scaleFactor),
(int) (ERROR_CATCH_IMAGE.getHeight() / scaleFactor), null);
}
public void drawCatchingEvent(GraphicInfo graphicInfo, boolean isInterrupting,
BufferedImage image, String eventType, double scaleFactor) {
// event circles
Ellipse2D outerCircle = new Ellipse2D.Double(graphicInfo.getX(), graphicInfo.getY(),
graphicInfo.getWidth(), graphicInfo.getHeight());
int innerCircleSize = (int) (4 / scaleFactor);
if (innerCircleSize == 0) {
innerCircleSize = 1;
}
int innerCircleX = (int) graphicInfo.getX() + innerCircleSize;
int innerCircleY = (int) graphicInfo.getY() + innerCircleSize;
int innerCircleWidth = (int) graphicInfo.getWidth() - (2 * innerCircleSize);
int innerCircleHeight = (int) graphicInfo.getHeight() - (2 * innerCircleSize);
Ellipse2D innerCircle = new Ellipse2D.Double(innerCircleX, innerCircleY, innerCircleWidth, innerCircleHeight);
Paint originalPaint = g.getPaint();
Stroke originalStroke = g.getStroke();
g.setPaint(EVENT_COLOR);
g.fill(outerCircle);
g.setPaint(EVENT_BORDER_COLOR);
if (isInterrupting == false)
g.setStroke(NON_INTERRUPTING_EVENT_STROKE);
g.draw(outerCircle);
g.setStroke(originalStroke);
g.setPaint(originalPaint);
g.draw(innerCircle);
if (image != null) {
int imageX = (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 4));
int imageY = (int) (graphicInfo.getY() + (graphicInfo.getHeight() / 4));
if (scaleFactor == 1.0 && "timer".equals(eventType)) {
// move image one pixel to center timer image
imageX--;
imageY--;
}
g.drawImage(image, imageX, imageY, (int) (image.getWidth() / scaleFactor),
(int) (image.getHeight() / scaleFactor), null);
}
}
public void drawCatchingTimerEvent(String name, GraphicInfo graphicInfo, boolean isInterrupting, double scaleFactor) {
drawCatchingTimerEvent(graphicInfo, isInterrupting, scaleFactor);
drawLabel(name, graphicInfo);
}
public void drawCatchingTimerEvent(GraphicInfo graphicInfo, boolean isInterrupting, double scaleFactor) {
drawCatchingEvent(graphicInfo, isInterrupting, TIMER_IMAGE, "timer", scaleFactor);
}
public void drawCatchingErrorEvent(String name, GraphicInfo graphicInfo, boolean isInterrupting, double scaleFactor) {
drawCatchingErrorEvent(graphicInfo, isInterrupting, scaleFactor);
drawLabel(name, graphicInfo);
}
public void drawCatchingErrorEvent(GraphicInfo graphicInfo, boolean isInterrupting, double scaleFactor) {
drawCatchingEvent(graphicInfo, isInterrupting, ERROR_CATCH_IMAGE, "error", scaleFactor);
}
public void drawCatchingSignalEvent(String name, GraphicInfo graphicInfo, boolean isInterrupting, double scaleFactor) {
drawCatchingSignalEvent(graphicInfo, isInterrupting, scaleFactor);
drawLabel(name, graphicInfo);
}
public void drawCatchingSignalEvent(GraphicInfo graphicInfo, boolean isInterrupting, double scaleFactor) {
drawCatchingEvent(graphicInfo, isInterrupting, SIGNAL_CATCH_IMAGE, "signal", scaleFactor);
}
public void drawThrowingSignalEvent(GraphicInfo graphicInfo, double scaleFactor) {
drawCatchingEvent(graphicInfo, true, SIGNAL_THROW_IMAGE, "signal", scaleFactor);
}
public void drawThrowingNoneEvent(GraphicInfo graphicInfo, double scaleFactor) {
drawCatchingEvent(graphicInfo, true, null, "none", scaleFactor);
}
public void drawSequenceflow(int srcX, int srcY, int targetX, int targetY, boolean conditional, double scaleFactor) {
drawSequenceflow(srcX, srcY, targetX, targetY, conditional, false, scaleFactor);
}
public void drawSequenceflow(int srcX, int srcY, int targetX, int targetY, boolean conditional, boolean highLighted, double scaleFactor) {
Paint originalPaint = g.getPaint();
if (highLighted)
g.setPaint(HIGHLIGHT_COLOR);
Line2D.Double line = new Line2D.Double(srcX, srcY, targetX, targetY);
g.draw(line);
drawArrowHead(line, scaleFactor);
if (conditional) {
drawConditionalSequenceFlowIndicator(line, scaleFactor);
}
if (highLighted)
g.setPaint(originalPaint);
}
public void drawAssociation(int[] xPoints, int[] yPoints, AssociationDirection associationDirection, boolean highLighted, double scaleFactor) {
boolean conditional = false, isDefault = false;
drawConnection(xPoints, yPoints, conditional, isDefault, "association", associationDirection, highLighted, scaleFactor);
}
public void drawSequenceflow(int[] xPoints, int[] yPoints, boolean conditional, boolean isDefault, boolean highLighted, double scaleFactor) {
drawConnection(xPoints, yPoints, conditional, isDefault, "sequenceFlow", AssociationDirection.ONE, highLighted, scaleFactor);
}
public void drawConnection(int[] xPoints, int[] yPoints, boolean conditional, boolean isDefault, String connectionType,
AssociationDirection associationDirection, boolean highLighted, double scaleFactor) {
Paint originalPaint = g.getPaint();
Stroke originalStroke = g.getStroke();
g.setPaint(CONNECTION_COLOR);
if (connectionType.equals("association")) {
g.setStroke(ASSOCIATION_STROKE);
} else if (highLighted) {
g.setPaint(HIGHLIGHT_COLOR);
g.setStroke(HIGHLIGHT_FLOW_STROKE);
}
for (int i=1; i<xPoints.length; i++) {
Integer sourceX = xPoints[i - 1];
Integer sourceY = yPoints[i - 1];
Integer targetX = xPoints[i];
Integer targetY = yPoints[i];
Line2D.Double line = new Line2D.Double(sourceX, sourceY, targetX, targetY);
g.draw(line);
}
if (isDefault){
Line2D.Double line = new Line2D.Double(xPoints[0], yPoints[0], xPoints[1], yPoints[1]);
drawDefaultSequenceFlowIndicator(line, scaleFactor);
}
if (conditional) {
Line2D.Double line = new Line2D.Double(xPoints[0], yPoints[0], xPoints[1], yPoints[1]);
drawConditionalSequenceFlowIndicator(line, scaleFactor);
}
if (associationDirection.equals(AssociationDirection.ONE) || associationDirection.equals(AssociationDirection.BOTH)) {
Line2D.Double line = new Line2D.Double(xPoints[xPoints.length-2], yPoints[xPoints.length-2], xPoints[xPoints.length-1], yPoints[xPoints.length-1]);
drawArrowHead(line, scaleFactor);
}
if (associationDirection.equals(AssociationDirection.BOTH)) {
Line2D.Double line = new Line2D.Double(xPoints[1], yPoints[1], xPoints[0], yPoints[0]);
drawArrowHead(line, scaleFactor);
}
g.setPaint(originalPaint);
g.setStroke(originalStroke);
}
public void drawSequenceflowWithoutArrow(int srcX, int srcY, int targetX, int targetY, boolean conditional, double scaleFactor) {
drawSequenceflowWithoutArrow(srcX, srcY, targetX, targetY, conditional, false, scaleFactor);
}
public void drawSequenceflowWithoutArrow(int srcX, int srcY, int targetX, int targetY, boolean conditional, boolean highLighted, double scaleFactor) {
Paint originalPaint = g.getPaint();
if (highLighted)
g.setPaint(HIGHLIGHT_COLOR);
Line2D.Double line = new Line2D.Double(srcX, srcY, targetX, targetY);
g.draw(line);
if (conditional) {
drawConditionalSequenceFlowIndicator(line, scaleFactor);
}
if (highLighted)
g.setPaint(originalPaint);
}
public void drawArrowHead(Line2D.Double line, double scaleFactor) {
int doubleArrowWidth = (int) (2 * ARROW_WIDTH / scaleFactor);
if (doubleArrowWidth == 0) {
doubleArrowWidth = 2;
}
Polygon arrowHead = new Polygon();
arrowHead.addPoint(0, 0);
int arrowHeadPoint = (int) (-ARROW_WIDTH / scaleFactor);
if (arrowHeadPoint == 0) {
arrowHeadPoint = -1;
}
arrowHead.addPoint(arrowHeadPoint, -doubleArrowWidth);
arrowHeadPoint = (int) (ARROW_WIDTH / scaleFactor);
if (arrowHeadPoint == 0) {
arrowHeadPoint = 1;
}
arrowHead.addPoint(arrowHeadPoint, -doubleArrowWidth);
AffineTransform transformation = new AffineTransform();
transformation.setToIdentity();
double angle = Math.atan2(line.y2 - line.y1, line.x2 - line.x1);
transformation.translate(line.x2, line.y2);
transformation.rotate((angle - Math.PI / 2d));
AffineTransform originalTransformation = g.getTransform();
g.setTransform(transformation);
g.fill(arrowHead);
g.setTransform(originalTransformation);
}
public void drawDefaultSequenceFlowIndicator(Line2D.Double line, double scaleFactor) {
double length = DEFAULT_INDICATOR_WIDTH / scaleFactor, halfOfLength = length/2, f = 8;
Line2D.Double defaultIndicator = new Line2D.Double(-halfOfLength, 0, halfOfLength, 0);
double angle = Math.atan2(line.y2 - line.y1, line.x2 - line.x1);
double dx = f * Math.cos(angle), dy = f * Math.sin(angle),
x1 = line.x1 + dx, y1 = line.y1 + dy;
AffineTransform transformation = new AffineTransform();
transformation.setToIdentity();
transformation.translate(x1, y1);
transformation.rotate((angle - 3 * Math.PI / 4));
AffineTransform originalTransformation = g.getTransform();
g.setTransform(transformation);
g.draw(defaultIndicator);
g.setTransform(originalTransformation);
}
public void drawConditionalSequenceFlowIndicator(Line2D.Double line, double scaleFactor) {
if (scaleFactor > 1.0) return;
int horizontal = (int) (CONDITIONAL_INDICATOR_WIDTH * 0.7);
int halfOfHorizontal = horizontal / 2;
int halfOfVertical = CONDITIONAL_INDICATOR_WIDTH / 2;
Polygon conditionalIndicator = new Polygon();
conditionalIndicator.addPoint(0, 0);
conditionalIndicator.addPoint(-halfOfHorizontal, halfOfVertical);
conditionalIndicator.addPoint(0, CONDITIONAL_INDICATOR_WIDTH);
conditionalIndicator.addPoint(halfOfHorizontal, halfOfVertical);
AffineTransform transformation = new AffineTransform();
transformation.setToIdentity();
double angle = Math.atan2(line.y2 - line.y1, line.x2 - line.x1);
transformation.translate(line.x1, line.y1);
transformation.rotate((angle - Math.PI / 2d));
AffineTransform originalTransformation = g.getTransform();
g.setTransform(transformation);
g.draw(conditionalIndicator);
Paint originalPaint = g.getPaint();
g.setPaint(CONDITIONAL_INDICATOR_COLOR);
g.fill(conditionalIndicator);
g.setPaint(originalPaint);
g.setTransform(originalTransformation);
}
public void drawTask(BufferedImage icon, String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(name, graphicInfo);
g.drawImage(icon, (int) (graphicInfo.getX() + ICON_PADDING / scaleFactor),
(int) (graphicInfo.getY() + ICON_PADDING / scaleFactor),
(int) (icon.getWidth() / scaleFactor), (int) (icon.getHeight() / scaleFactor), null);
}
public void drawTask(String name, GraphicInfo graphicInfo) {
drawTask(name, graphicInfo, false);
}
public void drawPoolOrLane(String name, GraphicInfo graphicInfo) {
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
g.drawRect(x, y, width, height);
// Add the name as text, vertical
if(name != null && name.length() > 0) {
// Include some padding
int availableTextSpace = height - 6;
// Create rotation for derived font
AffineTransform transformation = new AffineTransform();
transformation.setToIdentity();
transformation.rotate(270 * Math.PI/180);
Font currentFont = g.getFont();
Font theDerivedFont = currentFont.deriveFont(transformation);
g.setFont(theDerivedFont);
String truncated = fitTextToWidth(name, availableTextSpace);
int realWidth = fontMetrics.stringWidth(truncated);
g.drawString(truncated, x + 2 + fontMetrics.getHeight(), 3 + y + availableTextSpace - (availableTextSpace - realWidth) / 2);
g.setFont(currentFont);
}
}
protected void drawTask(String name, GraphicInfo graphicInfo, boolean thickBorder) {
Paint originalPaint = g.getPaint();
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
// Create a new gradient paint for every task box, gradient depends on x and y and is not relative
g.setPaint(TASK_BOX_COLOR);
int arcR = 6;
if (thickBorder)
arcR = 3;
// shape
RoundRectangle2D rect = new RoundRectangle2D.Double(x, y, width, height, arcR, arcR);
g.fill(rect);
g.setPaint(TASK_BORDER_COLOR);
if (thickBorder) {
Stroke originalStroke = g.getStroke();
g.setStroke(THICK_TASK_BORDER_STROKE);
g.draw(rect);
g.setStroke(originalStroke);
} else {
g.draw(rect);
}
g.setPaint(originalPaint);
// text
if (name != null && name.length() > 0) {
int boxWidth = width - (2 * TEXT_PADDING);
int boxHeight = height - 16 - ICON_PADDING - ICON_PADDING - MARKER_WIDTH - 2 - 2;
int boxX = x + width/2 - boxWidth/2;
int boxY = y + height/2 - boxHeight/2 + ICON_PADDING + ICON_PADDING - 2 - 2;
drawMultilineCentredText(name, boxX, boxY, boxWidth, boxHeight);
}
}
protected void drawMultilineCentredText(String text, int x, int y, int boxWidth, int boxHeight) {
drawMultilineText(text, x, y, boxWidth, boxHeight, true);
}
protected void drawMultilineAnnotationText(String text, int x, int y, int boxWidth, int boxHeight) {
drawMultilineText(text, x, y, boxWidth, boxHeight, false);
}
protected void drawMultilineText(String text, int x, int y, int boxWidth, int boxHeight, boolean centered) {
// Create an attributed string based in input text
AttributedString attributedString = new AttributedString(text);
attributedString.addAttribute(TextAttribute.FONT, g.getFont());
attributedString.addAttribute(TextAttribute.FOREGROUND, Color.black);
AttributedCharacterIterator characterIterator = attributedString.getIterator();
int currentHeight = 0;
// Prepare a list of lines of text we'll be drawing
List<TextLayout> layouts = new ArrayList<TextLayout>();
String lastLine = null;
LineBreakMeasurer measurer = new LineBreakMeasurer(characterIterator, g.getFontRenderContext());
TextLayout layout = null;
while (measurer.getPosition() < characterIterator.getEndIndex() && currentHeight <= boxHeight) {
int previousPosition = measurer.getPosition();
// Request next layout
layout = measurer.nextLayout(boxWidth);
int height = ((Float)(layout.getDescent() + layout.getAscent() + layout.getLeading())).intValue();
if(currentHeight + height > boxHeight) {
// The line we're about to add should NOT be added anymore, append three dots to previous one instead
// to indicate more text is truncated
if (layouts.size() > 0) {
layouts.remove(layouts.size() - 1);
if(lastLine.length() >= 4) {
lastLine = lastLine.substring(0, lastLine.length() - 4) + "...";
}
layouts.add(new TextLayout(lastLine, g.getFont(), g.getFontRenderContext()));
}
} else {
layouts.add(layout);
lastLine = text.substring(previousPosition, measurer.getPosition());
currentHeight += height;
}
}
int currentY = y + (centered ? ((boxHeight - currentHeight) /2) : 0);
int currentX = 0;
// Actually draw the lines
for(TextLayout textLayout : layouts) {
currentY += textLayout.getAscent();
currentX = x + (centered ? ((boxWidth - ((Double)textLayout.getBounds().getWidth()).intValue()) /2) : 0);
textLayout.draw(g, currentX, currentY);
currentY += textLayout.getDescent() + textLayout.getLeading();
}
}
protected String fitTextToWidth(String original, int width) {
String text = original;
// remove length for "..."
int maxWidth = width - 10;
while (fontMetrics.stringWidth(text + "...") > maxWidth && text.length() > 0) {
text = text.substring(0, text.length() - 1);
}
if (!text.equals(original)) {
text = text + "...";
}
return text;
}
public void drawUserTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(USERTASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawScriptTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(SCRIPTTASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawServiceTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(SERVICETASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawReceiveTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(RECEIVETASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawSendTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(SENDTASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawManualTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(MANUALTASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawBusinessRuleTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(BUSINESS_RULE_TASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawCamelTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(CAMEL_TASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawMuleTask(String name, GraphicInfo graphicInfo, double scaleFactor) {
drawTask(MULE_TASK_IMAGE, name, graphicInfo, scaleFactor);
}
public void drawExpandedSubProcess(String name, GraphicInfo graphicInfo, Boolean isTriggeredByEvent, double scaleFactor) {
RoundRectangle2D rect = new RoundRectangle2D.Double(graphicInfo.getX(), graphicInfo.getY(),
graphicInfo.getWidth(), graphicInfo.getHeight(), 8, 8);
// Use different stroke (dashed)
if (isTriggeredByEvent) {
Stroke originalStroke = g.getStroke();
g.setStroke(EVENT_SUBPROCESS_STROKE);
g.draw(rect);
g.setStroke(originalStroke);
} else {
Paint originalPaint = g.getPaint();
g.setPaint(SUBPROCESS_BOX_COLOR);
g.fill(rect);
g.setPaint(SUBPROCESS_BORDER_COLOR);
g.draw(rect);
g.setPaint(originalPaint);
}
if (scaleFactor == 1.0 && name != null && !name.isEmpty()) {
String text = fitTextToWidth(name, (int) graphicInfo.getWidth());
g.drawString(text, (int) graphicInfo.getX() + 10, (int) graphicInfo.getY() + 15);
}
}
public void drawCollapsedSubProcess(String name, GraphicInfo graphicInfo, Boolean isTriggeredByEvent) {
drawCollapsedTask(name, graphicInfo, false);
}
public void drawCollapsedCallActivity(String name, GraphicInfo graphicInfo) {
drawCollapsedTask(name, graphicInfo, true);
}
protected void drawCollapsedTask(String name, GraphicInfo graphicInfo, boolean thickBorder) {
// The collapsed marker is now visualized separately
drawTask(name, graphicInfo, thickBorder);
}
public void drawCollapsedMarker(int x, int y, int width, int height) {
// rectangle
int rectangleWidth = MARKER_WIDTH;
int rectangleHeight = MARKER_WIDTH;
Rectangle rect = new Rectangle(x + (width - rectangleWidth) / 2, y + height - rectangleHeight - 3, rectangleWidth, rectangleHeight);
g.draw(rect);
// plus inside rectangle
Line2D.Double line = new Line2D.Double(rect.getCenterX(), rect.getY() + 2, rect.getCenterX(), rect.getMaxY() - 2);
g.draw(line);
line = new Line2D.Double(rect.getMinX() + 2, rect.getCenterY(), rect.getMaxX() - 2, rect.getCenterY());
g.draw(line);
}
public void drawActivityMarkers(int x, int y, int width, int height, boolean multiInstanceSequential, boolean multiInstanceParallel, boolean collapsed) {
if (collapsed) {
if (!multiInstanceSequential && !multiInstanceParallel) {
drawCollapsedMarker(x, y, width, height);
} else {
drawCollapsedMarker(x - MARKER_WIDTH / 2 - 2, y, width, height);
if (multiInstanceSequential) {
drawMultiInstanceMarker(true, x + MARKER_WIDTH / 2 + 2, y, width, height);
} else {
drawMultiInstanceMarker(false, x + MARKER_WIDTH / 2 + 2, y, width, height);
}
}
} else {
if (multiInstanceSequential) {
drawMultiInstanceMarker(true, x, y, width, height);
} else if (multiInstanceParallel) {
drawMultiInstanceMarker(false, x, y, width, height);
}
}
}
public void drawGateway(GraphicInfo graphicInfo) {
Polygon rhombus = new Polygon();
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
rhombus.addPoint(x, y + (height / 2));
rhombus.addPoint(x + (width / 2), y + height);
rhombus.addPoint(x + width, y + (height / 2));
rhombus.addPoint(x + (width / 2), y);
g.draw(rhombus);
}
public void drawParallelGateway(GraphicInfo graphicInfo, double scaleFactor) {
// rhombus
drawGateway(graphicInfo);
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
if (scaleFactor == 1.0) {
// plus inside rhombus
Stroke orginalStroke = g.getStroke();
g.setStroke(GATEWAY_TYPE_STROKE);
Line2D.Double line = new Line2D.Double(x + 10, y + height / 2, x + width - 10, y + height / 2); // horizontal
g.draw(line);
line = new Line2D.Double(x + width / 2, y + height - 10, x + width / 2, y + 10); // vertical
g.draw(line);
g.setStroke(orginalStroke);
}
}
public void drawExclusiveGateway(GraphicInfo graphicInfo, double scaleFactor) {
// rhombus
drawGateway(graphicInfo);
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
int quarterWidth = width / 4;
int quarterHeight = height / 4;
if (scaleFactor == 1.0) {
// X inside rhombus
Stroke orginalStroke = g.getStroke();
g.setStroke(GATEWAY_TYPE_STROKE);
Line2D.Double line = new Line2D.Double(x + quarterWidth + 3, y + quarterHeight + 3, x + 3 * quarterWidth - 3, y + 3 * quarterHeight - 3);
g.draw(line);
line = new Line2D.Double(x + quarterWidth + 3, y + 3 * quarterHeight - 3, x + 3 * quarterWidth - 3, y + quarterHeight + 3);
g.draw(line);
g.setStroke(orginalStroke);
}
}
public void drawInclusiveGateway(GraphicInfo graphicInfo, double scaleFactor) {
// rhombus
drawGateway(graphicInfo);
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
int diameter = width / 2;
if (scaleFactor == 1.0) {
// circle inside rhombus
Stroke orginalStroke = g.getStroke();
g.setStroke(GATEWAY_TYPE_STROKE);
Ellipse2D.Double circle = new Ellipse2D.Double(((width - diameter) / 2) + x, ((height - diameter) / 2) + y, diameter, diameter);
g.draw(circle);
g.setStroke(orginalStroke);
}
}
public void drawEventBasedGateway(GraphicInfo graphicInfo, double scaleFactor) {
// rhombus
drawGateway(graphicInfo);
if (scaleFactor == 1.0) {
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
double scale = .6;
GraphicInfo eventInfo = new GraphicInfo();
eventInfo.setX(x + width*(1-scale)/2);
eventInfo.setY(y + height*(1-scale)/2);
eventInfo.setWidth(width*scale);
eventInfo.setHeight(height*scale);
drawCatchingEvent(eventInfo, true, null, "eventGateway", scaleFactor);
double r = width / 6.;
// create pentagon (coords with respect to center)
int topX = (int)(.95 * r); // top right corner
int topY = (int)(-.31 * r);
int bottomX = (int)(.59 * r); // bottom right corner
int bottomY = (int)(.81 * r);
int[] xPoints = new int[]{ 0, topX, bottomX, -bottomX, -topX };
int[] yPoints = new int[]{ -(int)r, topY, bottomY, bottomY, topY };
Polygon pentagon = new Polygon(xPoints, yPoints, 5);
pentagon.translate(x+width/2, y+width/2);
// draw
g.drawPolygon(pentagon);
}
}
public void drawMultiInstanceMarker(boolean sequential, int x, int y, int width, int height) {
int rectangleWidth = MARKER_WIDTH;
int rectangleHeight = MARKER_WIDTH;
int lineX = x + (width - rectangleWidth) / 2;
int lineY = y + height - rectangleHeight - 3;
Stroke orginalStroke = g.getStroke();
g.setStroke(MULTI_INSTANCE_STROKE);
if (sequential) {
g.draw(new Line2D.Double(lineX, lineY, lineX + rectangleWidth, lineY));
g.draw(new Line2D.Double(lineX, lineY + rectangleHeight / 2, lineX + rectangleWidth, lineY + rectangleHeight / 2));
g.draw(new Line2D.Double(lineX, lineY + rectangleHeight, lineX + rectangleWidth, lineY + rectangleHeight));
} else {
g.draw(new Line2D.Double(lineX, lineY, lineX, lineY + rectangleHeight));
g.draw(new Line2D.Double(lineX + rectangleWidth / 2, lineY, lineX + rectangleWidth / 2, lineY + rectangleHeight));
g.draw(new Line2D.Double(lineX + rectangleWidth, lineY, lineX + rectangleWidth, lineY + rectangleHeight));
}
g.setStroke(orginalStroke);
}
public void drawHighLight(int x, int y, int width, int height) {
Paint originalPaint = g.getPaint();
Stroke originalStroke = g.getStroke();
g.setPaint(HIGHLIGHT_COLOR);
g.setStroke(THICK_TASK_BORDER_STROKE);
RoundRectangle2D rect = new RoundRectangle2D.Double(x, y, width, height, 20, 20);
g.draw(rect);
g.setPaint(originalPaint);
g.setStroke(originalStroke);
}
public void drawTextAnnotation(String text, GraphicInfo graphicInfo) {
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
Font originalFont = g.getFont();
Stroke originalStroke = g.getStroke();
g.setFont(ANNOTATION_FONT);
Path2D path = new Path2D.Double();
x += .5;
int lineLength = 18;
path.moveTo(x + lineLength, y);
path.lineTo(x, y);
path.lineTo(x, y + height);
path.lineTo(x + lineLength, y + height);
path.lineTo(x + lineLength, y + height -1);
path.lineTo(x + 1, y + height -1);
path.lineTo(x + 1, y + 1);
path.lineTo(x + lineLength, y + 1);
path.closePath();
g.draw(path);
int boxWidth = width - (2 * ANNOTATION_TEXT_PADDING);
int boxHeight = height - (2 * ANNOTATION_TEXT_PADDING);
int boxX = x + width/2 - boxWidth/2;
int boxY = y + height/2 - boxHeight/2;
if (text != null && text.isEmpty() == false) {
drawMultilineAnnotationText(text, boxX, boxY, boxWidth, boxHeight);
}
// restore originals
g.setFont(originalFont);
g.setStroke(originalStroke);
}
public void drawLabel(String text, GraphicInfo graphicInfo){
drawLabel(text, graphicInfo, true);
}
public void drawLabel(String text, GraphicInfo graphicInfo, boolean centered){
float interline = 1.0f;
// text
if (text != null && text.length()>0) {
Paint originalPaint = g.getPaint();
Font originalFont = g.getFont();
g.setPaint(LABEL_COLOR);
g.setFont(LABEL_FONT);
int wrapWidth = 100;
int textY = (int) (graphicInfo.getY() + graphicInfo.getHeight());
// TODO: use drawMultilineText()
AttributedString as = new AttributedString(text);
as.addAttribute(TextAttribute.FOREGROUND, g.getPaint());
as.addAttribute(TextAttribute.FONT, g.getFont());
AttributedCharacterIterator aci = as.getIterator();
FontRenderContext frc = new FontRenderContext(null, true, false);
LineBreakMeasurer lbm = new LineBreakMeasurer(aci, frc);
while (lbm.getPosition() < text.length()) {
TextLayout tl = lbm.nextLayout(wrapWidth);
textY += tl.getAscent();
Rectangle2D bb = tl.getBounds();
int tX = (int) graphicInfo.getX();
if (centered)
tX += (int) (graphicInfo.getWidth() / 2 - bb.getWidth() / 2);
tl.draw(g, tX, textY);
textY += tl.getDescent() + tl.getLeading() + (interline - 1.0f) * tl.getAscent();
}
// restore originals
g.setFont(originalFont);
g.setPaint(originalPaint);
}
}
/**
* This method makes coordinates of connection flow better.
* @param sourceShapeType
* @param targetShapeType
* @param sourceGraphicInfo
* @param targetGraphicInfo
* @param graphicInfoList
*
*/
public List<GraphicInfo> connectionPerfectionizer(SHAPE_TYPE sourceShapeType, SHAPE_TYPE targetShapeType, GraphicInfo sourceGraphicInfo, GraphicInfo targetGraphicInfo, List<GraphicInfo> graphicInfoList) {
Shape shapeFirst = createShape(sourceShapeType, sourceGraphicInfo);
Shape shapeLast = createShape(targetShapeType, targetGraphicInfo);
GraphicInfo graphicInfoFirst = graphicInfoList.get(0);
GraphicInfo graphicInfoLast = graphicInfoList.get(graphicInfoList.size()-1);
if (shapeFirst != null) {
graphicInfoFirst.setX(shapeFirst.getBounds2D().getCenterX());
graphicInfoFirst.setY(shapeFirst.getBounds2D().getCenterY());
}
if (shapeLast != null) {
graphicInfoLast.setX(shapeLast.getBounds2D().getCenterX());
graphicInfoLast.setY(shapeLast.getBounds2D().getCenterY());
}
Point p = null;
if (shapeFirst != null) {
Line2D.Double lineFirst = new Line2D.Double(graphicInfoFirst.getX(), graphicInfoFirst.getY(), graphicInfoList.get(1).getX(), graphicInfoList.get(1).getY());
p = getIntersection(shapeFirst, lineFirst);
if (p != null) {
graphicInfoFirst.setX(p.getX());
graphicInfoFirst.setY(p.getY());
}
}
if (shapeLast != null) {
Line2D.Double lineLast = new Line2D.Double(graphicInfoLast.getX(), graphicInfoLast.getY(), graphicInfoList.get(graphicInfoList.size()-2).getX(), graphicInfoList.get(graphicInfoList.size()-2).getY());
p = getIntersection(shapeLast, lineLast);
if (p != null) {
graphicInfoLast.setX(p.getX());
graphicInfoLast.setY(p.getY());
}
}
return graphicInfoList;
}
/**
* This method creates shape by type and coordinates.
* @param shapeType
* @param graphicInfo
* @return Shape
*/
private static Shape createShape(SHAPE_TYPE shapeType, GraphicInfo graphicInfo) {
if (SHAPE_TYPE.Rectangle.equals(shapeType)) {
// source is rectangle
return new Rectangle2D.Double(graphicInfo.getX(), graphicInfo.getY(), graphicInfo.getWidth(), graphicInfo.getHeight());
} else if (SHAPE_TYPE.Rhombus.equals(shapeType)) {
// source is rhombus
Path2D.Double rhombus = new Path2D.Double();
rhombus.moveTo(graphicInfo.getX(), graphicInfo.getY() + graphicInfo.getHeight() / 2);
rhombus.lineTo(graphicInfo.getX() + graphicInfo.getWidth() / 2, graphicInfo.getY() + graphicInfo.getHeight());
rhombus.lineTo(graphicInfo.getX() + graphicInfo.getWidth(), graphicInfo.getY() + graphicInfo.getHeight() / 2);
rhombus.lineTo(graphicInfo.getX() + graphicInfo.getWidth() / 2, graphicInfo.getY());
rhombus.lineTo(graphicInfo.getX(), graphicInfo.getY() + graphicInfo.getHeight() / 2);
rhombus.closePath();
return rhombus;
} else if (SHAPE_TYPE.Ellipse.equals(shapeType)) {
// source is ellipse
return new Ellipse2D.Double(graphicInfo.getX(), graphicInfo.getY(), graphicInfo.getWidth(), graphicInfo.getHeight());
} else {
// unknown source element, just do not correct coordinates
}
return null;
}
/**
* This method returns intersection point of shape border and line.
*
* @param shape
* @param line
* @return Point
*/
private static Point getIntersection(Shape shape, Line2D.Double line) {
if (shape instanceof Ellipse2D) {
return getEllipseIntersection(shape, line);
} else if (shape instanceof Rectangle2D || shape instanceof Path2D) {
return getShapeIntersection(shape, line);
} else {
// something strange
return null;
}
}
/**
* This method calculates ellipse intersection with line
* @param shape
* Bounds of this shape used to calculate parameters of inscribed into this bounds ellipse.
* @param line
* @return Intersection point
*/
private static Point getEllipseIntersection(Shape shape, Line2D.Double line) {
double angle = Math.atan2(line.y2 - line.y1, line.x2 - line.x1);
double x = shape.getBounds2D().getWidth()/2 * Math.cos(angle) + shape.getBounds2D().getCenterX();
double y = shape.getBounds2D().getHeight()/2 * Math.sin(angle) + shape.getBounds2D().getCenterY();
Point p = new Point();
p.setLocation(x, y);
return p;
}
/**
* This method calculates shape intersection with line.
*
* @param shape
* @param line
* @return Intersection point
*/
private static Point getShapeIntersection(Shape shape, Line2D.Double line) {
PathIterator it = shape.getPathIterator(null);
double[] coords = new double[6];
double[] pos = new double[2];
Line2D.Double l = new Line2D.Double();
while (!it.isDone()) {
int type = it.currentSegment(coords);
switch (type) {
case PathIterator.SEG_MOVETO:
pos[0] = coords[0];
pos[1] = coords[1];
break;
case PathIterator.SEG_LINETO:
l = new Line2D.Double(pos[0], pos[1], coords[0], coords[1]);
if (line.intersectsLine(l)) {
return getLinesIntersection(line, l);
}
pos[0] = coords[0];
pos[1] = coords[1];
break;
case PathIterator.SEG_CLOSE:
break;
default:
// whatever
}
it.next();
}
return null;
}
/**
* This method calculates intersections of two lines.
* @param a Line 1
* @param b Line 2
* @return Intersection point
*/
private static Point getLinesIntersection(Line2D a, Line2D b) {
double d = (a.getX1()-a.getX2())*(b.getY2()-b.getY1()) - (a.getY1()-a.getY2())*(b.getX2()-b.getX1());
double da = (a.getX1()-b.getX1())*(b.getY2()-b.getY1()) - (a.getY1()-b.getY1())*(b.getX2()-b.getX1());
// double db = (a.getX1()-a.getX2())*(a.getY1()-b.getY1()) - (a.getY1()-a.getY2())*(a.getX1()-b.getX1());
double ta = da/d;
// double tb = db/d;
Point p = new Point();
p.setLocation(a.getX1()+ta*(a.getX2()-a.getX1()), a.getY1()+ta*(a.getY2()-a.getY1()));
return p;
}
}