figures.java

java实现的版画图程序

package drawfigure;

import java.util.*;
import java.awt.*;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: 金京铭</p>
 * @author 孙明辉
 * @version 1.0
 */

public class Figures {
	Vector figureGroup;
	public Figures() {
		figureGroup = new Vector();
	}

	public boolean add(Object o) {
		return figureGroup.add(o);
	}
	public Object get(int index) {
		return figureGroup.get(index);
	}
	public int size() {
		return figureGroup.size();
	}

	public void remove(Figure f) {
		figureGroup.remove(f);
	}
	public Figure remove(int index) {
		return (Figure) figureGroup.remove(index);
	}

	public void removeAllElements() {
		figureGroup.removeAllElements();
	}
	/**
	 * 通过点p获得图形，如果该点同时在两个图形内，则返回最近画的那个
	 * @param p
	 * @return
	 */
	public Figure getFigureFromPoint(Point p) {
		Figure currFigure;
		for (int i = figureGroup.size() - 1; i >= 0; i--) {
			currFigure=(Figure) figureGroup.get(i);
			if (currFigure.pointInside(p)||currFigure.pointInControlRect(p)) {
				return currFigure;
			}
		}
		return null;
	}
	/**
	 * 设置所有的Figure为未选中状态
	 *
	 */
	public void unSelectedAll() {
		for (int i = 0; i < figureGroup.size(); i++) {
			((Figure) figureGroup.get(i)).unSelected();
		}
	}
	/**
	 * 获得鼠标形状
	 * @param p
	 * @return Cursor
	 */
	public Cursor getCursor(Point p) {
		Figure tmpFigure;
		for (int i = figureGroup.size() - 1; i >= 0; i--) {
			tmpFigure = (Figure) figureGroup.get(i);
			if ((tmpFigure.isSelected())
				&& (tmpFigure.pointInside(p)
					||(tmpFigure.pointInControlRect(p)))) {
				return tmpFigure.getCursor(p);
			}
		}
		return new Cursor(Cursor.DEFAULT_CURSOR);
	}
	/**
	 * 打印所有的Figure信息到控制台
	 *
	 */
	public void printAllFigures() {
		Figure f;
		for (int i = 0; i < figureGroup.size(); i++) {
			f = (Figure) figureGroup.get(i);
			System.out.println("<" + i + ">");
			System.out.println("  FigureType=" + f.getClass().getName());
			System.out.println("  startPoint=" + f.getStartPoint());
			System.out.println("  endPoint=" + f.getEndPoint());
			System.out.println("  isFirstDraw=" + f.isFirstDraw());
			System.out.println("  isSelected=" + f.isSelected());
			System.out.println("  isMoving=" + f.isMoving());
			System.out.println("  isResizing=" + f.isResizing());
			System.out.println("  isDrawing=" + f.isDrawing());
		}
	}
}