一个用JAVA做的简单的画图程序

package com.sunking.tp.swing; import java.awt.Color; import java.awt.Component; import java.awt.Cursor; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Point; import java.awt.Rectangle; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.util.Vector; import javax.swing.JPanel; import javax.swing.SwingUtilities; import javax.swing.event.MouseInputListener; import com.sunking.tp.framework.AssoicatorLine; import com.sunking.tp.framework.Desktop; import com.sunking.tp.framework.JTPComponent; import com.sunking.tp.framework.JTPMenuFactory; import com.sunking.tp.tool.SelectionTool; import com.sunking.tp.tool.Tool; /** * * <p>Title: </p> * <p>Description: 画图桌面</p> * <p>Copyright: Copyright (c) 2007</p> * <p>Company: </p> * @author <a href="mailto:tommorowisbetter@hotmail.com">Better</a> * @version 1.1 */ public class JTPDesktopPane extends JPanel implements Desktop, java.io.Serializable { private static final long serialVersionUID = -3000000000000000009L; /** * */ // BasicStroke stroke=new BasicStroke(1.0f,BasicStroke.CAP_BUTT, // BasicStroke.JOIN_ROUND,140.0f,new float[]{1.0f},150.0f); /** *拖动框 */ Rectangle dragRec = null; /** *当前选取的连线 */ AssoicatorLine selectedLine = null; /** *所有连线 */ AssoicatorLine assoicatorLines[] = null; /** *最大尺寸 */ Dimension maxSize = new Dimension(0, 0); /** *当前工具 */ Tool tool; /** *默认工具 */ transient Tool defaultTool; /** *右键弹出菜单生成器 */ transient JTPMenuFactory jtpMenuFactory; /** * 最后生成的btt */ JTPComponent lastBtt; public static Color bg; /////////////// // public void mouseDragged(MouseEvent e) // { // System.out.print("txxxxx"); // } // // public void mouseMoved(MouseEvent e) // { // // } //////////////// public JTPDesktopPane() { this.setLayout(null); //this.addMouseMotionListener(this); setTool(getDefaultTool()); //setBackground(UIManager.getColor("Desktop.background")); setBackground(Color.white); bg=this.getBackground(); } /** *添加鼠标监听器 * @param l */ public void addMouseInputListener(MouseInputListener l) { this.addMouseListener(l); this.addMouseMotionListener(l); } /** *移除鼠标监听器 * @param l */ public void removeMouseInputListener(MouseInputListener l) { this.removeMouseListener(l); this.removeMouseMotionListener(l); } /** *取得某点上的组件 * @param p * @return */ public JTPComponent getJTPComponent(Point p) { for (int i = 0; i < getComponentCount(); i++) { Component c = getComponent(i); Point p1 = SwingUtilities.convertPoint(this, p, c); if ( (c instanceof JTPComponent) && c.contains(p1)) { return (JTPComponent) c; } } return null; } /** *取得某点上的组件,但排除传入的组件 * @param Point * @param Compoent * @return JTPComponent */ public JTPComponent getJTPComponentExcept(Point p,Component exceptC) { for (int i = 0; i < getComponentCount(); i++) { Component c = getComponent(i); Point p1 = SwingUtilities.convertPoint(this, p, c); if ( (c instanceof JTPComponent) && c.contains(p1) && !c.equals(exceptC)) { return (JTPComponent) c; } } return null; } /** *如果进入了某个控件区域,鼠标指针换成相应的形状 * @param Point p * @return boolean */ public Cursor getEnteredComponentCursor(Point p) { for (int i = 0; i < getComponentCount(); i++) { Component c = getComponent(i); Point p1 = SwingUtilities.convertPoint(this, p, c); if ( (c instanceof JTPComponent) && c.contains(p1)) { int handleIndex = ( (JTPComponent) c).getHandle(p1); if (((JTPComponent)c).isSelected() && handleIndex != -1){ return ( (JTPComponent) c).getAdjustCursor(handleIndex); } else{ return new Cursor(Cursor.HAND_CURSOR); } } } if (assoicatorLines != null && p != null) { for (int i = 0; i < assoicatorLines.length; i++) { if (assoicatorLines[i].contains(p)) { return new Cursor(Cursor.HAND_CURSOR); } } } return Cursor.getDefaultCursor(); } /** *取得当前选取的组件 * @return */ public JTPComponent[] getSelectionJTPComponent() { Vector vSelection = new Vector(); for (int i = 0; i < getComponentCount(); i++) { Component c = getComponent(i); if (c instanceof JTPComponent) { JTPComponent tc = (JTPComponent) c; if (tc.isSelected()) { vSelection.add(tc); } } } JTPComponent tpc[] = new JTPComponent[vSelection.size()]; vSelection.copyInto(tpc); return tpc; } /** *添加选取的组件 * @param c */ public void addSelection(JTPComponent c) { c.setSelect(true); } /** *移除选取的组件 * @param c */ public void removeSelection(JTPComponent c) { c.setSelect(false); } /** *设置工具 * @param t */ public void setTool(Tool t) { getDefaultTool().disabledTool(); if (tool != null) { tool.disabledTool(); } this.tool = t; if (t != null) { t.enabledTool(); } else { getDefaultTool().enabledTool(); } repaint(); } /** *取得当前工具 * @return */ public Tool getTool() { if (tool != null) { return tool; } return getDefaultTool(); } /** *取得默认工具 * @return */ public Tool getDefaultTool() { if (defaultTool == null) { defaultTool = new SelectionTool(this); } return defaultTool; } /** *激发连接器更新 */ public void fireAssoicatorChanged() { assoicatorLines = getAssoicatorLines(); this.setPreferredSize(maxSize); repaint(); if (getParent() != null) { getParent().doLayout(); } } /** *鼠标点击选取 * @param p */ public void mouseSelect(Point p) { selectedLine = null; JTPComponent tp = getJTPComponent(p); if (tp != null) { tp.setSelect(true); } else { if (assoicatorLines != null && p != null) { for (int i = 0; i < assoicatorLines.length; i++) { if (assoicatorLines[i].contains(p)) { selectedLine = assoicatorLines[i]; } } } } repaint(); } /** *鼠标拉框选取 * @param rec */ public void mouseSelect(Rectangle rec) { dragRec = rec; if (dragRec == null) { repaint(); return; } for (int i = 0; i < getComponentCount(); i++) { Component c = getComponent(i); if (c instanceof JTPComponent) { if (c.getBounds().intersects(rec)) {