org.activiti.image.impl.DefaultProcessDiagramCanvas Maven / Gradle / Ivy
/*
* Copyright 2017 Alfresco, Inc. and/or its affiliates.
*
* 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.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
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.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;
import java.util.ArrayList;
import java.util.List;
import org.activiti.bpmn.model.AssociationDirection;
import org.activiti.bpmn.model.GraphicInfo;
import org.activiti.image.exception.ActivitiImageException;
import org.activiti.image.impl.icon.BusinessRuleTaskIconType;
import org.activiti.image.impl.icon.CompensateIconType;
import org.activiti.image.impl.icon.CompensateThrowIconType;
import org.activiti.image.impl.icon.ErrorIconType;
import org.activiti.image.impl.icon.ErrorThrowIconType;
import org.activiti.image.impl.icon.IconType;
import org.activiti.image.impl.icon.ManualTaskIconType;
import org.activiti.image.impl.icon.MessageIconType;
import org.activiti.image.impl.icon.ReceiveTaskIconType;
import org.activiti.image.impl.icon.ScriptTaskIconType;
import org.activiti.image.impl.icon.SendTaskIconType;
import org.activiti.image.impl.icon.ServiceTaskIconType;
import org.activiti.image.impl.icon.SignalIconType;
import org.activiti.image.impl.icon.SignalThrowIconType;
import org.activiti.image.impl.icon.TaskIconType;
import org.activiti.image.impl.icon.TimerIconType;
import org.activiti.image.impl.icon.UserTaskIconType;
import org.apache.batik.dom.GenericDOMImplementation;
import org.apache.batik.svggen.SVGGraphics2DIOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.DOMImplementation;
import org.w3c.dom.Document;
/**
* Represents a canvas on which BPMN 2.0 constructs can be drawn.
*
* @see org.activiti.image.impl.DefaultProcessDiagramGenerator
*/
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 = null;
// 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 TaskIconType USERTASK_IMAGE;
protected static TaskIconType SCRIPTTASK_IMAGE;
protected static TaskIconType SERVICETASK_IMAGE;
protected static TaskIconType RECEIVETASK_IMAGE;
protected static TaskIconType SENDTASK_IMAGE;
protected static TaskIconType MANUALTASK_IMAGE;
protected static TaskIconType BUSINESS_RULE_TASK_IMAGE;
protected static IconType TIMER_IMAGE;
protected static IconType COMPENSATE_THROW_IMAGE;
protected static IconType COMPENSATE_CATCH_IMAGE;
protected static IconType ERROR_THROW_IMAGE;
protected static IconType ERROR_CATCH_IMAGE;
protected static IconType MESSAGE_CATCH_IMAGE;
protected static IconType SIGNAL_CATCH_IMAGE;
protected static IconType SIGNAL_THROW_IMAGE;
protected int canvasWidth = -1;
protected int canvasHeight = -1;
protected int minX = -1;
protected int minY = -1;
protected ProcessDiagramSVGGraphics2D g;
protected FontMetrics fontMetrics;
protected boolean closed;
protected String activityFontName = "Arial";
protected String labelFontName = "Arial";
protected String annotationFontName = "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 activityFontName,
String labelFontName,
String annotationFontName) {
this.canvasWidth = width;
this.canvasHeight = height;
this.minX = minX;
this.minY = minY;
if (activityFontName != null) {
this.activityFontName = activityFontName;
}
if (labelFontName != null) {
this.labelFontName = labelFontName;
}
if (annotationFontName != null) {
this.annotationFontName = annotationFontName;
}
initialize();
}
/**
* 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) {
this.canvasWidth = width;
this.canvasHeight = height;
this.minX = minX;
this.minY = minY;
initialize();
}
public void initialize() {
// Get a DOMImplementation.
DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
// Create an instance of org.w3c.dom.Document.
String svgNS = "http://www.w3.org/2000/svg";
Document document = domImpl.createDocument(svgNS,
"svg",
null);
// Create an instance of the SVG Generator.
this.g = new ProcessDiagramSVGGraphics2D(document);
this.g.setSVGCanvasSize(new Dimension(this.canvasWidth, this.canvasHeight));
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);
ANNOTATION_FONT = new Font(annotationFontName,
Font.PLAIN,
FONT_SIZE);
USERTASK_IMAGE = new UserTaskIconType();
SCRIPTTASK_IMAGE = new ScriptTaskIconType();
SERVICETASK_IMAGE = new ServiceTaskIconType();
RECEIVETASK_IMAGE = new ReceiveTaskIconType();
SENDTASK_IMAGE = new SendTaskIconType();
MANUALTASK_IMAGE = new ManualTaskIconType();
BUSINESS_RULE_TASK_IMAGE = new BusinessRuleTaskIconType();
TIMER_IMAGE = new TimerIconType();
COMPENSATE_THROW_IMAGE = new CompensateThrowIconType();
COMPENSATE_CATCH_IMAGE = new CompensateIconType();
ERROR_THROW_IMAGE = new ErrorThrowIconType();
ERROR_CATCH_IMAGE = new ErrorIconType();
MESSAGE_CATCH_IMAGE = new MessageIconType();
SIGNAL_THROW_IMAGE = new SignalThrowIconType();
SIGNAL_CATCH_IMAGE = new SignalIconType();
}
/**
* Generates an image of what currently is drawn on the canvas.
*
* Throws an {@link ActivitiImageException} when {@link #close()} is already
* called.
*/
public InputStream generateImage() {
if (closed) {
throw new ActivitiImageException("ProcessDiagramGenerator already closed");
}
try {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
Writer out;
out = new OutputStreamWriter(stream,
"UTF-8");
g.stream(out,
true);
return new ByteArrayInputStream(stream.toByteArray());
} catch (UnsupportedEncodingException | SVGGraphics2DIOException e) {
throw new ActivitiImageException("Error while generating process image",
e);
}
}
/**
* Closes the canvas which dissallows further drawing and releases graphical
* resources.
*/
public void close() {
g.dispose();
closed = true;
}
public void drawNoneStartEvent(String id,
GraphicInfo graphicInfo) {
drawStartEvent(id,
graphicInfo,
null);
}
public void drawTimerStartEvent(String id,
GraphicInfo graphicInfo) {
drawStartEvent(id,
graphicInfo,
TIMER_IMAGE);
}
public void drawSignalStartEvent(String id,
GraphicInfo graphicInfo) {
drawStartEvent(id,
graphicInfo,
SIGNAL_CATCH_IMAGE);
}
public void drawMessageStartEvent(String id,
GraphicInfo graphicInfo) {
drawStartEvent(id,
graphicInfo,
MESSAGE_CATCH_IMAGE);
}
public void drawStartEvent(String id,
GraphicInfo graphicInfo,
IconType icon) {
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);
// calculate coordinates to center image
if (icon != null) {
int imageX = (int) Math.round(graphicInfo.getX() + (graphicInfo.getWidth() / 2) - (icon.getWidth() / 2));
int imageY = (int) Math.round(graphicInfo.getY() + (graphicInfo.getHeight() / 2) - (icon.getHeight() / 2));
icon.drawIcon(imageX,
imageY,
ICON_PADDING,
g);
}
// set element's id
g.setCurrentGroupId(id);
}
public void drawNoneEndEvent(String id,
String name,
GraphicInfo graphicInfo) {
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);
g.setStroke(END_EVENT_STROKE);
g.draw(circle);
g.setStroke(originalStroke);
g.setPaint(originalPaint);
// set element's id
g.setCurrentGroupId(id);
drawLabel(name,
graphicInfo);
}
public void drawErrorEndEvent(String id,
String name,
GraphicInfo graphicInfo) {
drawNoneEndEvent(id,
name,
graphicInfo);
int imageX = (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 4));
int imageY = (int) (graphicInfo.getY() + (graphicInfo.getHeight() / 4));
ERROR_THROW_IMAGE.drawIcon(imageX,
imageY,
ICON_PADDING,
g);
}
public void drawErrorStartEvent(String id,
GraphicInfo graphicInfo) {
drawNoneStartEvent(id,
graphicInfo);
int imageX = (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 4));
int imageY = (int) (graphicInfo.getY() + (graphicInfo.getHeight() / 4));
ERROR_THROW_IMAGE.drawIcon(imageX,
imageY,
ICON_PADDING,
g);
}
public void drawCatchingEvent(String id,
GraphicInfo graphicInfo,
boolean isInterrupting,
IconType icon,
String eventType) {
// event circles
Ellipse2D outerCircle = new Ellipse2D.Double(graphicInfo.getX(),
graphicInfo.getY(),
graphicInfo.getWidth(),
graphicInfo.getHeight());
int innerCircleSize = 4;
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) {
g.setStroke(NON_INTERRUPTING_EVENT_STROKE);
}
g.draw(outerCircle);
g.setStroke(originalStroke);
g.setPaint(originalPaint);
g.draw(innerCircle);
if (icon != null) {
// calculate coordinates to center image
int imageX = (int) (graphicInfo.getX() + (graphicInfo.getWidth() / 2) - (icon.getWidth() / 2));
int imageY = (int) (graphicInfo.getY() + (graphicInfo.getHeight() / 2) - (icon.getHeight() / 2));
if ("timer".equals(eventType)) {
// move image one pixel to center timer image
imageX++;
imageY++;
}
icon.drawIcon(imageX,
imageY,
ICON_PADDING,
g);
}
// set element's id
g.setCurrentGroupId(id);
}
public void drawCatchingCompensateEvent(String id,
String name,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingCompensateEvent(id,
graphicInfo,
isInterrupting);
drawLabel(name,
graphicInfo);
}
public void drawCatchingCompensateEvent(String id,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingEvent(id,
graphicInfo,
isInterrupting,
COMPENSATE_CATCH_IMAGE,
"compensate");
}
public void drawCatchingTimerEvent(String id,
String name,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingTimerEvent(id,
graphicInfo,
isInterrupting);
drawLabel(name,
graphicInfo);
}
public void drawCatchingTimerEvent(String id,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingEvent(id,
graphicInfo,
isInterrupting,
TIMER_IMAGE,
"timer");
}
public void drawCatchingErrorEvent(String id,
String name,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingErrorEvent(id,
graphicInfo,
isInterrupting);
drawLabel(name,
graphicInfo);
}
public void drawCatchingErrorEvent(String id,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingEvent(id,
graphicInfo,
isInterrupting,
ERROR_CATCH_IMAGE,
"error");
}
public void drawCatchingSignalEvent(String id,
String name,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingSignalEvent(id,
graphicInfo,
isInterrupting);
drawLabel(name,
graphicInfo);
}
public void drawCatchingSignalEvent(String id,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingEvent(id,
graphicInfo,
isInterrupting,
SIGNAL_CATCH_IMAGE,
"signal");
}
public void drawCatchingMessageEvent(String id,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingEvent(id,
graphicInfo,
isInterrupting,
MESSAGE_CATCH_IMAGE,
"message");
}
public void drawCatchingMessageEvent(String id,
String name,
GraphicInfo graphicInfo,
boolean isInterrupting) {
drawCatchingEvent(id,
graphicInfo,
isInterrupting,
MESSAGE_CATCH_IMAGE,
"message");
drawLabel(name,
graphicInfo);
}
public void drawThrowingCompensateEvent(String id,
GraphicInfo graphicInfo) {
drawCatchingEvent(id,
graphicInfo,
true,
COMPENSATE_THROW_IMAGE,
"compensate");
}
public void drawThrowingSignalEvent(String id,
GraphicInfo graphicInfo) {
drawCatchingEvent(id,
graphicInfo,
true,
SIGNAL_THROW_IMAGE,
"signal");
}
public void drawThrowingNoneEvent(String id,
GraphicInfo graphicInfo) {
drawCatchingEvent(id,
graphicInfo,
true,
null,
"none");
}
public void drawSequenceflow(int srcX,
int srcY,
int targetX,
int targetY,
boolean conditional) {
drawSequenceflow(srcX,
srcY,
targetX,
targetY,
conditional,
false);
}
public void drawSequenceflow(int srcX,
int srcY,
int targetX,
int targetY,
boolean conditional,
boolean highLighted) {
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);
if (conditional) {
drawConditionalSequenceFlowIndicator(line);
}
if (highLighted) {
g.setPaint(originalPaint);
}
}
public void drawAssociation(int[] xPoints,
int[] yPoints,
AssociationDirection associationDirection,
boolean highLighted) {
boolean conditional = false;
boolean isDefault = false;
drawConnection(xPoints,
yPoints,
conditional,
isDefault,
"association",
associationDirection,
highLighted);
}
public void drawSequenceflow(int[] xPoints,
int[] yPoints,
boolean conditional,
boolean isDefault,
boolean highLighted) {
drawConnection(xPoints,
yPoints,
conditional,
isDefault,
"sequenceFlow",
AssociationDirection.ONE,
highLighted);
}
public void drawConnection(int[] xPoints,
int[] yPoints,
boolean conditional,
boolean isDefault,
String connectionType,
AssociationDirection associationDirection,
boolean highLighted) {
Paint originalPaint = g.getPaint();
Stroke originalStroke = g.getStroke();
g.setPaint(CONNECTION_COLOR);
if ("association".equals(connectionType)) {
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);
}
if (conditional) {
Line2D.Double line = new Line2D.Double(xPoints[0],
yPoints[0],
xPoints[1],
yPoints[1]);
drawConditionalSequenceFlowIndicator(line);
}
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);
}
if (associationDirection.equals(AssociationDirection.BOTH)) {
Line2D.Double line = new Line2D.Double(xPoints[1],
yPoints[1],
xPoints[0],
yPoints[0]);
drawArrowHead(line);
}
g.setPaint(originalPaint);
g.setStroke(originalStroke);
}
public void drawSequenceflowWithoutArrow(int srcX,
int srcY,
int targetX,
int targetY,
boolean conditional) {
drawSequenceflowWithoutArrow(srcX,
srcY,
targetX,
targetY,
conditional,
false);
}
public void drawSequenceflowWithoutArrow(int srcX,
int srcY,
int targetX,
int targetY,
boolean conditional,
boolean highLighted) {
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);
}
if (highLighted) {
g.setPaint(originalPaint);
}
}
public void drawArrowHead(Line2D.Double line) {
int doubleArrowWidth = (int) (2 * ARROW_WIDTH);
if (doubleArrowWidth == 0) {
doubleArrowWidth = 2;
}
Polygon arrowHead = new Polygon();
arrowHead.addPoint(0,
0);
int arrowHeadPoint = (int) (-ARROW_WIDTH);
if (arrowHeadPoint == 0) {
arrowHeadPoint = -1;
}
arrowHead.addPoint(arrowHeadPoint,
-doubleArrowWidth);
arrowHeadPoint = (int) (ARROW_WIDTH);
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 length = DEFAULT_INDICATOR_WIDTH;
double halfOfLength = length / 2;
double 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);
double dy = f * Math.sin(angle);
double x1 = line.x1 + dx;
double 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) {
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(TaskIconType icon,
String id,
String name,
GraphicInfo graphicInfo) {
drawTask(id,
name,
graphicInfo);
icon.drawIcon((int) graphicInfo.getX(),
(int) graphicInfo.getY(),
ICON_PADDING,
g);
}
public void drawTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(id,
name,
graphicInfo,
false);
}
public void drawPoolOrLane(String id,
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);
}
// set element's id
g.setCurrentGroupId(id);
}
protected void drawTask(String id,
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);
}
// set element's id
g.setCurrentGroupId(id);
}
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 layouts = new ArrayList();
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.isEmpty()) {
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()));
}
break;
} 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 id,
String name,
GraphicInfo graphicInfo) {
drawTask(USERTASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawScriptTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(SCRIPTTASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawServiceTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(SERVICETASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawReceiveTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(RECEIVETASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawSendTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(SENDTASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawManualTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(MANUALTASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawBusinessRuleTask(String id,
String name,
GraphicInfo graphicInfo) {
drawTask(BUSINESS_RULE_TASK_IMAGE,
id,
name,
graphicInfo);
}
public void drawExpandedSubProcess(String id,
String name,
GraphicInfo graphicInfo,
Boolean isTriggeredByEvent) {
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 (name != null && !name.isEmpty()) {
String text = fitTextToWidth(name,
(int) graphicInfo.getWidth());
g.drawString(text,
(int) graphicInfo.getX() + 10,
(int) graphicInfo.getY() + 15);
}
// set element's id
g.setCurrentGroupId(id);
}
public void drawCollapsedSubProcess(String id,
String name,
GraphicInfo graphicInfo,
Boolean isTriggeredByEvent) {
drawCollapsedTask(id,
name,
graphicInfo,
false);
}
public void drawCollapsedCallActivity(String id,
String name,
GraphicInfo graphicInfo) {
drawCollapsedTask(id,
name,
graphicInfo,
true);
}
protected void drawCollapsedTask(String id,
String name,
GraphicInfo graphicInfo,
boolean thickBorder) {
// The collapsed marker is now visualized separately
drawTask(id,
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(String id,
GraphicInfo graphicInfo) {
// rhombus
drawGateway(graphicInfo);
int x = (int) graphicInfo.getX();
int y = (int) graphicInfo.getY();
int width = (int) graphicInfo.getWidth();
int height = (int) graphicInfo.getHeight();
// 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);
// set element's id
g.setCurrentGroupId(id);
}
public void drawExclusiveGateway(String id,
GraphicInfo graphicInfo) {
// 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;
// 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);
// set element's id
g.setCurrentGroupId(id);
}
public void drawInclusiveGateway(String id,
GraphicInfo graphicInfo) {
// 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;
// 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);
// set element's id
g.setCurrentGroupId(id);
}
public void drawEventBasedGateway(String id,
GraphicInfo graphicInfo) {
// rhombus
drawGateway(graphicInfo);
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(null,
eventInfo,
true,
null,
"eventGateway");
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);
// set element's id
g.setCurrentGroupId(id);
}
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 id,
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()) {
drawMultilineAnnotationText(text,
boxX,
boxY,
boxWidth,
boxHeight);
}
// restore originals
g.setFont(originalFont);
g.setStroke(originalStroke);
// set element's id
g.setCurrentGroupId(id);
}
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();
// 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();
double tX = graphicInfo.getX();
if (centered) {
tX += (int) (graphicInfo.getWidth() / 2 - bb.getWidth() / 2);
}
tl.draw(g,
(float) 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 connectionPerfectionizer(SHAPE_TYPE sourceShapeType,
SHAPE_TYPE targetShapeType,
GraphicInfo sourceGraphicInfo,
GraphicInfo targetGraphicInfo,
List graphicInfoList) {
Shape shapeFirst = createShape(sourceShapeType,
sourceGraphicInfo);
Shape shapeLast = createShape(targetShapeType,
targetGraphicInfo);
if (graphicInfoList != null && graphicInfoList.size() > 0) {
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());
}
// 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 ta = da / d;
Point p = new Point();
p.setLocation(a.getX1() + ta * (a.getX2() - a.getX1()),
a.getY1() + ta * (a.getY2() - a.getY1()));
return p;
}
}