Posted on 2007-04-26 11:54
G_G 閱讀(516)
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Swing
?圖象拖動（簡單）
???
代碼 上 哈? 解釋不多 ！！！?? ??
??? ^_^??
package?src.jframe;
import?javax.swing.JFrame;
import?javax.swing.JOptionPane;
import?java.awt.Event;
import?java.awt.Graphics;
import?java.awt.Point;
import?java.awt.Rectangle;
import?java.awt.event.MouseEvent;
import?java.awt.event.MouseListener;
import?java.awt.event.MouseMotionListener;
import?java.awt.event.WindowEvent;
import?java.awt.event.WindowListener;
import?java.util.ArrayList;
public?class?MyFrame?implements?MouseListener,MouseMotionListener?{
????//圖象集合
????private?ArrayList?list?=?new?ArrayList();
????//當(dāng)前?拖動?圖象
????private?Rectangle?re?=?null?;
????
????
????private??JFrame?jf?;
????{?
????????jf?=?new?JFrame(){
????????????public?void?paint(Graphics?g){
????????????????super.paint(g);
????????????????for(int?i=0;i<list.size();i++){
????????????????????Rectangle?ne?=????(Rectangle)list.get(i);
????????????????????this.getGraphics().drawRect(ne.x,ne.y,ne.height,ne.width);
????????????????????System.out.println("ok");
????????????????}
????????????}
????????};
????????jf.addWindowListener(new?WindowListener(){
????????????public?void?windowActivated(WindowEvent?e)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????
????????????}
????????????public?void?windowClosed(WindowEvent?e)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????
????????????}
????????????public?void?windowClosing(WindowEvent?e)?{
????????????????System.exit(0);
????????????????
????????????}
????????????public?void?windowDeactivated(WindowEvent?e)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????
????????????}
????????????public?void?windowDeiconified(WindowEvent?e)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????
????????????}
????????????public?void?windowIconified(WindowEvent?e)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????
????????????}
????????????public?void?windowOpened(WindowEvent?e)?{
????????????????//?TODO?Auto-generated?method?stub
????????????????
????????????}
????????????
????????});
????????jf.setBounds(400,400,400,400);
????????jf.addMouseListener(this);
????????jf.addMouseMotionListener(this);
????????jf.setVisible(true);
????}
????
?????public?JFrame?getFrame(){
?????????return?this.jf?;
?????}
????
????//雙擊?花出圖象
????public?void?mouseClicked(MouseEvent?e)?{
????????if(e.getClickCount()?==?2){
????????Point?po?=?e.getPoint()?;
????????Rectangle?ne?=?new?Rectangle();
????????ne.setBounds((int)po.getX(),(int)po.getY(),20,20);
????????System.out.println("ko1");
????????addList(ne);??//添加入?集合
????????}
????}
????private?void?addList(Rectangle?ne)?{
????????list.add(ne);
????????this.jf.repaint();
????}
????
????public?void?mouseEntered(MouseEvent?e)?{
????}
????public?void?mouseExited(MouseEvent?e)?{
????
????}
????//?拖動選取
????public?void?mousePressed(MouseEvent?e)?{
????????this.re?=?null?;
????????for(int?i=0;i<this.list.size();i++){
????????????Rectangle?re?=?(Rectangle)list.get(i);
????????????if(?re.contains((int)e.getX(),(int)e.getY())?){
????????????????this.re?=?re;
????????????}
????????}
????}
????public?void?mouseReleased(MouseEvent?e)?{
????}
????//關(guān)鍵?拖動?***********************
????public?void?mouseDragged(MouseEvent?e)?{
????????????if(this.re?!=?null){
????????????????this.re.setBounds((int)e.getX(),(int)e.getY(),20,20);
????????????????this.jf.repaint();
????????????}
????}
????public?void?mouseMoved(MouseEvent?e)?{
????}
????
????public?static?void?main(String[]args){
????????
????????JFrame?jf?=?(new?MyFrame()).getFrame();
????}
}
圖象的縮放Graphics2D *******
????protected?void?paintComponent(Graphics?g)?
{
????????Graphics2D?g2d?=?(Graphics2D)g;
????????double?bh?=????fh?/?1200?;
????????double?bw?=???fw?/?600;
????????g2d.scale(bh,bw);
????????getDisplayUpdate().draw(g2d,?this);
????????this.setBackground(this.getBg());
????}
????