arrowshell.java

一个可视化编辑器的基础结构

package org.goshawk.workflow.GUI.ShapeShell;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.MenuItem;
import java.awt.Polygon;
import java.awt.PopupMenu;
import java.awt.Shape;
import java.awt.geom.Line2D;
import java.util.Map;

import org.goshawk.workflow.GUI.Action.DeleteArrowAction;

public class ArrowShell extends ShapeShell
{
	private int fx;
	private int fy;
	private int endx;
	private int endy;
	private ShapeShell startNode;
	private ShapeShell endNode;
	private Polygon triangle = null;
	private Line2D line = null;
	private PopupMenu popupMenu = null;

	public ArrowShell(int fx, int fy, int endx, int endy)
	{
		this.fx = fx;
		this.fy = fy;
		this.endx = endx;
		this.endy = endy;
		triangle = (Polygon) drawArrow(fx,fy,endx,endy,15);
		line = new Line2D.Double(fx,fy,endx,endy);
	}

	public ArrowShell(ShapeShell start,ShapeShell end)
	{
		this.fx = start.getCenterX();
		this.fy = start.getCenterY();
		this.endx = end.getCenterX();
		this.endy = end.getCenterY();
		triangle = (Polygon) drawArrow(fx,fy,endx,endy,15);
		line = new Line2D.Double(fx,fy,endx,endy);
		this.startNode = start;
		this.endNode =end;
	}
	
	public boolean contains(int x, int y)
	{
		return triangle.contains(x,y)||lineCotains(x,y);
	}

	public Shape getShape()
	{
		System.out.println("该图形没有Shape,如有疑问请与作者联系");
		return null;
	}

	public void setShape(Shape shape) throws ShapeShellException
	{
		System.out.println("该图形没有Shape,如有疑问请与作者联系");
	}

	public int getHeight(){return 0;}

	public void setHeight(int height){}

	public int getWidth(){return 0;}

	public void setWidth(int width){}

	public int getX(){return 0;}

	public void setX(int x){}

	public int getY(){return 0;}

	public void setY(int y){}

	public int getCenterX(){return 0;}

	public int getCenterY(){return 0;}

	public void paint(Graphics g)
	{
		Graphics2D g2 = (Graphics2D) g;
		g2.fill(triangle);
		g2.draw(line);
		if(isSelected)
		{
			g2.setColor(selectedColor);
			g2.fillRect(fx-2,fy-2,4,4);
			g2.fillRect(endx-2,endy-2,4,4);
		}
	}

	public PopupMenu getPopupMenu()
	{
		popupMenu = new PopupMenu("1");
		MenuItem deleteItem = new MenuItem("删除");
		deleteItem.addActionListener(new DeleteArrowAction(this));
		popupMenu.add(deleteItem);
		return popupMenu;
	}

	public void setPopupMenu(PopupMenu menu){}

	public Object clone(){return null;}

	public void editShape(int mousex, int mousey){}

	private Shape drawArrow(int startX,int startY,int endX,int endY,int size)
	{
		double xx=0,yy=0,xx1=0,yy1=0,xx2=0,yy2=0;
		int myWidth=0;
		int myHeight=0;
		xx=endX-(endX-startX)*myWidth/Math.pow((double)(endX-startX)*(endX-startX)+(double)(endY-startY)*(endY-startY),1/2d);
		yy=endY-(endY-startY)*myHeight/(Math.pow((double)(endX-startX)*(endX-startX)+(double)(endY-startY)*(endY-startY),1/2d));
		xx1=xx-size*Math.cos(Math.atan(((double)yy-startY)/((double)xx-startX))-radians(30));
		yy1=yy-size*Math.sin(Math.atan(((double)yy-startY)/((double)xx-startX))-radians(30));
		xx2=xx-size*Math.sin(radians(60)-Math.atan(((double)(yy-startY))/((double)(xx-startX))));
		yy2=yy-size*Math.cos(radians(60)-Math.atan(((double)(yy-startY))/((double)(xx-startX))));
		if(startX+myWidth>endX+myWidth) {
		  xx1=xx+size*Math.cos(Math.atan(((double)yy-startY)/((double)xx-startX))-radians(30));
		  yy1=yy+size*Math.sin(Math.atan(((double)yy-startY)/((double)xx-startX))-radians(30));
		  xx2=xx+size*Math.sin(radians(60)-Math.atan(((double)(yy-startY))/((double)(xx-startX))));
		  yy2=yy+size*Math.cos(radians(60)-Math.atan(((double)(yy-startY))/((double)(xx-startX))));
		}	
		return new Polygon(new int[] {(int)xx2,(int)xx1,(int)xx}, new int[] {(int)yy2,(int)yy1,(int)yy}, 3);
	}
	public double radians(int degrees)// 该函数用于将角度转化为弧度
	{
		return ((double) degrees) * Math.PI / 180.0;
	}

	public void addOtherShape(ShapeShell shape)
	{
	}

	public Map getOtherShapes()
	{
		return null;
	}

	public Map setOtherShapes(Map shapes)
	{
		return null;
	}

	public ShapeShell getOtherShape(String id)
	{
		return null;
	}

	public ShapeShell removeOtherShape(String id)
	{
		return null;
	}

	public ShapeShell getEndNode()
	{
		return endNode;
	}

	public void setEndNode(ShapeShell endNode)
	{
		this.endNode = endNode;
		endx = endNode.getCenterX();
		endy = endNode.getCenterY();
		triangle = (Polygon) drawArrow(fx,fy,endx,endy,15);
		line = line = new Line2D.Double(fx,fy,endx,endy);
	}

	public ShapeShell getStartNode()
	{
		return startNode;
	}

	public void setStartNode(ShapeShell startNode)
	{
		this.startNode = startNode;
		fx = startNode.getCenterX();
		fy = startNode.getCenterY();
		triangle = (Polygon) drawArrow(fx,fy,endx,endy,15);
		line = line = new Line2D.Double(fx,fy,endx,endy);
	}
	
	private boolean lineCotains(double x,double y)
	{
		/*double startx = fx;
		double starty = fy;
		double endx = this.endx;
		double endy = this.endy;
		double k1 = (y-starty)/(x-startx);
		double k2 = (endy-starty)/(endx-startx);
		return k1==k2;*/
		return false;
	}
	
}