简单画图程序设计.doc

2011年01月16日 星期日设为主页加入收藏帮助|留言交流| 退出 首页 |主题阅读 |tags |精彩目录 |精品文苑 |会员浏览 我的图书馆 休闲怡情|艺术音画美女笑话小游戏壁纸风景 健康养生|健身食疗治病中医减肥经穴亚健康 生活情感|哲理情感家居母婴美食美容百宝箱 文教社会|读书人文历史社会教育职场电脑 简单的画图程序 （转载） jhl666666 收录于2011-01-16 阅读数：查看 收藏数：6公众公开原文来源 tags： java 图像编程 修改 以文找文 推荐给好友 如何对文章标记，添加批注？一共有10个类，其中GBase和HBase分别是图元的基类和操作基类，比较重要的类是GraphicList和PointerHandler，这个是图形操作主要类，DefaultGraphic是矩形，Line是线，目前只做了这么两个图形，对应还有操作类(句柄)，DrawPanel是画布，没什么重要的，只是分配了操作图元的句柄而以，好了，废话少说，看代码：DrawPanel.java=package drawing;import java.awt.*;import java.awt.event.*;import javax.swing.JFrame;import drawing.Handler.*;import javax.swing.JPanel;/* Title: * Description: * Copyright: Copyright (c) 2005* Company: * author not attributable* version 1.0*/public class DrawPanel extends JPanel implements MouseListener, MouseMotionListener public GraphicsList graphicsList; public int ActiveTool; public Cursor Cursor; HBase tools = new HBase(int) HandlerType.NumberOfDrawTools; public DrawPanel() graphicsList = new GraphicsList(); tools = new HBase(int) HandlerType.NumberOfDrawTools; tools(int) HandlerType.Pointer = new PointerHandler(); tools(int) HandlerType.DefaultGraphics = new HBase(); toolsHandlerType.Line = new LineHandler(); setDoubleBuffered(true); addMouseListener(this); addMouseMotionListener(this); ActiveTool = HandlerType.Pointer; setBackground(Color.white); /*由mousePressed(),mouseReleased()取得示拖曳的开始与结束坐标*/ public void mousePressed(MouseEvent e) if (e.getButton() = e.BUTTON1) tools(int) ActiveTool.OnMouseDown(this, e); public void mouseReleased(MouseEvent e) if (e.getButton() = e.BUTTON1) tools(int) ActiveTool.OnMouseUp(this, e); public void mouseEntered(MouseEvent e) public void mouseExited(MouseEvent e) public void mouseClicked(MouseEvent e) if (e.getClickCount() = 2) if( e.getButton()=e.BUTTON1 ) ActiveTool = HandlerType.DefaultGraphics; else ActiveTool = HandlerType.Line; /*mouseMoved(),mouseDragged()取得鼠标移动的每一个坐标，并调用repaint()方法*/ public void mouseMoved(MouseEvent e) tools(int) ActiveTool.OnMouseMove(this, e); repaint(); public void mouseDragged(MouseEvent e) tools(int) ActiveTool.OnMouseDrag(this, e); repaint(); public void update(Graphics g) g.setColor(Color.white); g.fillRect(0, 0, getWidth(), getHeight(); paint(g); public void paint(Graphics g) g.setColor(Color.white); g.fillRect(0, 0, getWidth(), getHeight(); if (graphicsList != null) graphicsList.Draw(g); DrawNetSelection(g); /* * DrawNetSelection * * param g Graphics */ private void DrawNetSelection(Graphics g) g.setColor(Color.BLACK); if (NetRectangle != null & DrawNetRectangle) g.drawRect(NetRectangle.x, NetRectangle.y, NetRectangle.width, NetRectangle.height); /* * setDrawNetRectangle * * param b boolean */ boolean DrawNetRectangle = false; public void setDrawNetRectangle(boolean b) DrawNetRectangle = b; public boolean IsDrawNetRectangle() return DrawNetRectangle; /* * setNetRectangle * * param rectangle Rectangle */ Rectangle NetRectangle; public void setNetRectangle(Rectangle rectangle) NetRectangle = rectangle; public Rectangle getNetRectangle() return NetRectangle; public static void main(String args) new DrawTool(); =DrawTool.java(显示窗体)=package drawing;import java.awt.Toolkit;import javax.swing.SwingUtilities;import javax.swing.UIManager;import java.awt.Dimension;import javax.swing.JPanel;import java.awt.BorderLayout;import javax.swing.JFrame;import javax.swing.JButton;import java.awt.*;/* Title: * Description: * Copyright: Copyright (c) 2005* Company: * author not attributable* version 1.0*/public class DrawTool extends JFrame JPanel contentPane; BorderLayout borderLayout1 = new BorderLayout(); DrawPanel drawpanel = new DrawPanel(); public DrawTool() try setDefaultCloseOperation(EXIT_ON_CLOSE); jbInit(); catch (Exception exception) exception.printStackTrace(); /* * Component initialization. * * throws java.lang.Exception */ private void jbInit() throws Exception contentPane = (JPanel) getContentPane(); contentPane.setLayout(borderLayout1); setSize(new Dimension(400, 300); setTitle(糊涂仙); show(); contentPane.add(drawpanel, java.awt.BorderLayout.CENTER); =GraphicList.java=package drawing;import java.util.ArrayList;import java.awt.Graphics;import drawing.Graphics.GBase;import java.awt.Point;import java.awt.Rectangle;import drawing.Graphics.DefaultGraphic;/* Title: * Description: * Copyright: Copyright (c) 2005* Company: * author not attributable* version 1.0*/public class GraphicsList ArrayList graphicslist = new ArrayList(); public GraphicsList() public void Draw(Graphics g) for (int i = 0; i graphicslist.size(); i+) GBase o = (GBase) graphicslist.get(i); o.Draw(g); public void Add(GBase o) graphicslist.add(0, o); public void Remove(GBase o) o.OnDelete(); graphicslist.remove(o); if (o instanceof DefaultGraphic) for (int i = 0; i (DefaultGraphic) o).getJoinLines().size(); i+) if (graphicslist.contains(DefaultGraphic) o).getJoinLines(). get(i) graphicslist.remove(DefaultGraphic) o).getJoinLines().get( i); for (int i = 0; i = graphicslist.size() return null; return (GBase) graphicslist.get(index); / / 选中图元的总数/ public int getSelectionCount() int n = 0; for (int i = 0; i graphicslist.size(); i+) GBase o = (GBase) graphicslist.get(i); if (o.IsSelected() n+; return n; / / 获取选中的图元/ / / public GBase GetSelectedObject(int index) int n = -1; for (int i = 0; i graphicslist.size(); i+) GBase o = (GBase) graphicslist.get(i); if (o.IsSelected() n+; if (n = index) return o; return null; / / 选中矩形范围内的所有图元/ / public void SelectInRectangle(Rectangle rectangle) UnselectAll(); for (int i = 0; i graphicslist.size(); i+) GBase o = (GBase) graphicslist.get(i); if (o.IntersectsWith(rectangle) o.setSelected(true); / / 取消选中所有图元/ public void UnselectAll() for (int i = 0; i graphicslist.size(); i+) GBase o = (GBase) graphicslist.get(i); if (o.IsSelected() o.setSelected(false); / / 选中所有图元/ public void SelectAll() for (int i = 0; i graphicslist.size(); i+) GBase o = (GBase) graphicslist.get(i); if (o.IsSelected() o.setSelected(true); / / 删除选中的图元/ / public boolean DeleteSelection() boolean result = false; int n = graphicslist.size(); for (int i = n - 1; i = 0; i-) if (GBase) graphicslist.get(i).IsSelected() Object oe = graphicslist.get(i); if (graphicslist.contains(oe) (GBase) oe).OnDelete(); graphicslist.remove(oe); if (oe instanceof DefaultGraphic) for (int j = 0; j (DefaultGraphic) oe).getJoinLines().size(); j+) if (graphicslist.contains(DefaultGraphic) oe). getJoinLines(). get(j) graphicslist.remove(DefaultGraphic) oe). getJoinLines().get( j); for (int j = 0; j (DefaultGraphic) oe).getSplitLines().size(); j+) if (graphicslist.contains(DefaultGraphic) oe). getSplitLines(). get(j) graphicslist.remove(DefaultGraphic) oe). getSplitLines().get( j); result = true; return result; / / 将选中图元置前/ / public boolean MoveSelectionToFront() int n; int i; ArrayList tempList; tempList = new ArrayList(); n = graphicslist.size(); for (i = n - 1; i = 0; i-) if (GBase) graphicslist.get(i).IsSelected() tempList.add(graphicslist.get(i); graphicslist.remove(i); n = tempList.size(); for (i = 0; i 0); / / 将选中图元置后/ / public boolean MoveSelectionToBack() int n; int i; ArrayList tempList; tempList = new ArrayList(); n = graphicslist.size(); for (i = n - 1; i = 0; i-) if (GBase) graphicslist.get(i).IsSelected() tempList.add(graphicslist.get(i); graphicslist.remove(i); n = tempList.size(); for (i = n - 1; i = 0; i-) graphicslist.add(tempList.get(i); return (n 0); / / 获得某一点的图元/ / / / public GBase GetAt(int x, int y) for (int i = 0; i = 0) return (GBase) get(i); return null; =GBase.java=package drawing.Graphics;import java.awt.*;import java.util.ArrayList; /* * Title: * * Description: * * Copyright: Copyright (c) 2005 * * Company: * * author not attributable * version 1.0 */ public abstract class GBase public void Draw(Graphics g) public void DrawTracker(Graphics g) if (!IsSelected() return; for (int i = 1; i = getHandleCount(); i+) g.setColor(Color.BLACK); g.fillRect(GetHandleRectangle(i).x,GetHandleRectangle(i).y,GetHandleRectangle(i).width,GetHandleRectangle(i).height); public Point GetHandle(int handleNumber) return null; public Cursor GetHandleCursor(int handleNumber) return null; public Rectangle GetHandleRectangle(int handleNumber) Point point = GetHandle(handleNumber); return new Rectangle(point.x - 3, point.y - 3, 7, 7); public int getHandleCount() return 0; public void HintShow(Graphics g) public int HitTest(Point point) return 0; public boolean IntersectsWith(Rectangle rectangle) return false; public Point getmaxPoint() return null; public void Move(int deltaX, int deltaY) public void MoveHandleTo(Point point, int handleNumber) public void Normalize() public void OnDelete() boolean selected=false; public boolean IsSelected() return selected; public void setSelected(boolean Selected) selected=Selected; public Point GetMiddlePoint() return null; public Point GetPointOfIntersection(Point point) return null; / / 获得正常的矩形(给出点时,可能会给出一个反向的,此时矩形的起始点并非最小点,此时要进行计算找到最小点,以最小点为坐标绘制矩形) / / / / / / public static Rectangle GetNormalizedRectangle(int x1, int y1, int x2, int y2) if (x2 x1) int tmp = x2; x2 = x1; x1 = tmp; if (y2 y1) int tmp = y2; y2 = y1; y1 = tmp; return new Rectangle(x1, y1, x2 - x1, y2 - y1); / / 获取正常的矩形 / / / / public static Rectangle GetNormalizedRectangle(Point p1, Point p2) return DefaultGraphic.GetNormalizedRectangle(p1.x, p1.y, p2.x, p2.y); / / 获取正常的矩形 / / / public static Rectangle GetNormalizedRectangle(Rectangle r) return DefaultGraphic.GetNormalizedRectangle(r.x, r.y, r.x + r.width, r.y + r.height); public static Point GetPointOfIntersection(Rectangle rect, Point pos) Point posCenter = new Point(rect.x+ rect.width / 2, rect.y + rect.height / 2); Point posResult = new Point(); if (pos.y= rect.y + rect.height) & (pos.x = rect.x) & (pos.x posCenter.y) return new Point(pos.x, rect.y + rect.height); else return new Point(pos.x, rect.y); if (pos.y=posCenter.y) if (pos.x posCenter.x) return new Point(rect.x, posCenter.y); else return new Point(rect.x + rect.width, posCenter.y); /bottom and top /bottom a = pos.y - posCenter.y; b = posCenter.x - pos.x; c = rect.height; d = rect.width; c = c / d; a = a / b; if (pos.x = c & pos.y rect.y + rect.height) posResult.y = rect.y + rect.height; posResult.x = posCenter.x - rect.height / 2 * (posCenter.x - pos.x) / (pos.y - posCenter.y); return posResult; /right a = pos.y - posCenter.y; b = pos.x - posCenter.x; c = rect.height; d = rect.width; a = a / b; c