graphicszoomer.java

基于java Swing的一款简单的2D图形绘制软件程序

import java.awt.Shape;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;

/**
 * 
 */

/**
 * @author squirrel
 *
 */
public class GraphicsZoomer {

	public Shape zoom(ShapeEntity object,int io)
	{
		Shape shape = null;
		int shapeType = object.getShapeType();
		if(shapeType == 0 || shapeType == 1)
			shape =  this.zoomLine(object, io);
		else if(shapeType == 2)
			shape = this.zoomEllipse(object, io);
		else if(shapeType == 3)
			shape = this.zoomRectangle(object, io);
		
		return shape;
	}
	
	private Shape zoomLine(ShapeEntity object,int io)
	{	
		int resizeX = 10 * io;
		int resizeY = 10 * io;
		
		double beginX = object.getBeginX() - resizeX;
		double beginY = object.getBeginY() - resizeY;
		
		double endX = object.getEndX() + resizeX;
		double endY = object.getEndY() + resizeX;
		
		
		object.setBeginX(beginX);
		object.setBeginY(beginY);
		object.setEndX(endX);
		object.setEndY(endY);
		
		Shape shape = new Line2D.Double(beginX,beginY,endX,endY);
		return shape;
	}
	
	private Shape zoomEllipse(ShapeEntity object,int io)
	{
		int resizeX = 10 * io;
		int resizeY = 10 * io;
		
		double beginX = object.getBeginX() - resizeX;
		double beginY = object.getBeginY() - resizeY;
		
		double endX = object.getEndX() + resizeX;
		double endY = object.getEndY() + resizeX;
		
		object.setBeginX(beginX);
		object.setBeginY(beginY);
		object.setEndX(endX);
		object.setEndY(endY);
		
		double width = endX - beginX;
		
		double height = endY - beginY;
		
		Shape shape = new Ellipse2D.Double(beginX,beginY,width,height);
		return shape;
	}
	
	private Shape zoomRectangle(ShapeEntity object, int io)
	{
		int resizeX = 10 * io;
		int resizeY = 10 * io;
		
		double beginX = object.getBeginX() - resizeX;
		double beginY = object.getBeginY() - resizeY;
		
		double endX = object.getEndX() + resizeX;
		double endY = object.getEndY() + resizeX;
		
		object.setBeginX(beginX);
		object.setBeginY(beginY);
		object.setEndX(endX);
		object.setEndY(endY);
		
		double width = endX - beginX;
		double height = endY - beginY;
		
		Shape shape = new Rectangle2D.Double(beginX,beginY,width,height);
		return shape;
	}
}