开源OA协同办公系统，集成Flowable流程引擎 可拖拽创建个性表单

package com.pointlion.back.oa.service.flowImg; import org.flowable.bpmn.model.AssociationDirection; import org.flowable.bpmn.model.GraphicInfo; import org.flowable.image.exception.FlowableImageException; import org.flowable.image.util.ReflectUtil; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.imageio.ImageIO; import java.awt.*; import java.awt.font.FontRenderContext; import java.awt.font.LineBreakMeasurer; import java.awt.font.TextAttribute; import java.awt.font.TextLayout; import java.awt.geom.*; 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; /** * @Description: CustomProcessDiagramCanvas * @Author: 丶Lion * @Date: 2019/10/15 0015 9:55 * @Version 1.0 */ public class CustomProcessDiagramCanvas { private static final Logger LOG = LoggerFactory.getLogger(CustomProcessDiagramCanvas.class); /** * 形状类型：长方形、菱形、椭圆 */ 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 RUNNING_HIGHLIGHT_COLOR = Color.RED; protected static Color HIGHLIGHT_COLOR = Color.GREEN; protected static Color LABEL_COLOR = new Color(112, 146, 190); // protected static Color LABEL_COLOR = Color.blue; 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 = new Font("微软雅黑", Font.ITALIC, 11); 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 //TODO 边框宽度修改 //protected static Stroke THICK_TASK_BORDER_STROKE = new BasicStroke(3.0f); protected static Stroke THICK_TASK_BORDER_STROKE = new BasicStroke(2.0f); 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 COMPENSATE_THROW_IMAGE; protected static BufferedImage COMPENSATE_CATCH_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 CustomProcessDiagramCanvas(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 CustomProcessDiagramCanvas(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