/***
DrawFrame 类文件内容：
Email:[email protected]
*****/
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Checkbox;
import java.awt.CheckboxGroup;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Label;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.ArrayList;
import javax.swing.JOptionPane;
public class DrawFrame extends Frame {
CheckboxGroup cbg = new CheckboxGroup();
CheckboxGroup shapecbg = new CheckboxGroup();
CheckboxGroup shapeFillcbg = new CheckboxGroup();
Button btn_String =new Button("插入文字");
DrawPanel drawPanel = new DrawPanel(this);
public void setFrame() {
Button btn_clear = new Button("清屏");
btn_clear.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
drawPanel.shapes.removeAll(drawPanel.shapes);
drawPanel.repaint();
drawPanel.shape = null;
}
});
Label lab1 = new Label("ControlGroup");
btn_clear.setBackground(Color.LIGHT_GRAY);
Panel paramPanel = new Panel();
paramPanel.setLayout(new GridLayout(3, 3));
Checkbox cb1 = new Checkbox("Black", cbg, true);
Checkbox cb2 = new Checkbox("Red", cbg, false);
Checkbox cb3 = new Checkbox("Blue", cbg, false);
Checkbox shapecb1 = new Checkbox("线", shapecbg, true);
Checkbox shapecb2 = new Checkbox("圆", shapecbg, false);
Checkbox shapecb3 = new Checkbox("方", shapecbg, false);
Checkbox shapeFillcb1 = new Checkbox("实心", shapeFillcbg, false);
Checkbox shapeFillcb2 = new Checkbox("空心", shapeFillcbg, true);
paramPanel.add(cb1);
paramPanel.add(cb2);
paramPanel.add(cb3);
paramPanel.add(lab1);
paramPanel.add(shapecb1);
paramPanel.add(shapecb2);
paramPanel.add(shapecb3);
//paramPanel.add(new Label());
paramPanel.add(btn_clear);
paramPanel.add(shapeFillcb1);
paramPanel.add(shapeFillcb2);
btn_String.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
String str=JOptionPane.showInputDialog("输入字符 ");
drawPanel.str=str;
}
});
paramPanel.add(btn_String);
paramPanel.setBackground(Color.LIGHT_GRAY);
this.add(paramPanel, BorderLayout.NORTH);
this.add(drawPanel,BorderLayout.CENTER);
this.setSize(400, 400);
this.setLocation(200, 200);
this.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
this.setVisible(true);
}
public static void main(String[] args) {
DrawFrame dp=new DrawFrame();
dp.setFrame();
}
}
DrawPanel 文件代码：
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Panel;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseWheelListener;
import java.util.ArrayList;
public class DrawPanel extends Panel {
DrawFrame df;
ArrayList<Shape> shapes =new ArrayList<Shape>();
//Graphics g = getGraphics();
Shape shape = null;
String str = null;
public DrawPanel(DrawFrame df){
this.df=df;
this.setBackground(Color.yellow);
this.addMouseListener(new MousePaint1());
this.addMouseMotionListener(new MousePaint2());
}
public void paint(Graphics g) {
if(shape!= null)shape.draw(g);
this.drawShape(g);
}
private Color getColor() {
if(df.cbg.getSelectedCheckbox().getLabel()=="Blue")
return Color.blue;
if(df.cbg.getSelectedCheckbox().getLabel()=="Red")
return Color.red;
if(df.cbg.getSelectedCheckbox().getLabel()=="Black")
return Color.black;
return Color.black;
}
private Shape getShape() {
//System.out.println("return share");
if(str != null)
return new Word();
if(df.shapecbg.getSelectedCheckbox().getLabel()=="线")
return new Line();
if(df.shapecbg.getSelectedCheckbox().getLabel()=="方")
return new Rec();
if(df.shapecbg.getSelectedCheckbox().getLabel()=="圆")
return new Circular();
return new Line();
}
private boolean getFill(){
if(df.shapeFillcbg.getSelectedCheckbox().getLabel()=="实心")
return true;
return false;
}
private void drawShape(Graphics g){
for(int i=0; i<shapes.size(); i++){
shapes.get(i).draw(g);
}
}
class MousePaint1 extends MouseAdapter {
public void mousePressed(MouseEvent e) {
shape=getShape();
//shape=new Shape();
shape.x = e.getX();
shape.y = e.getY();
shape.c = getColor();
shape.fill=getFill();
shape.str=str;
//shape.g = g;
//System.out.println("Press");
}
public void mouseReleased(MouseEvent e) {
if(shape != null)
shapes.add(shape);
shape = null;
str = null;
repaint();
System.out.println(shapes.size());
}
}
class MousePaint2 extends MouseMotionAdapter {
public void mouseDragged(MouseEvent e) {
shape.x1=e.getX();
shape.y1=e.getY();
//shape.draw(g);
repaint();
//System.out.println("draw current");
}
public void mouseMoved(MouseEvent e) {
}
}
}
Shape 文件代码，这是所有图形的父类，以此实现多态：
import java.awt.Color;
import java.awt.Graphics;
public class Shape {
int x;
int y;
int x1;
int y1;
int width;
int height;
Color c;
String str = null;
boolean fill = false;
//Graphics g;
public void draw(Graphics g) {
//System.out.println("shape draws");
//g.draw3DRect(20, 20, 20, 20, true);
}
public int getDrawX(){
if(x>x1)return x1;
return x;
}
public int getDrawY(){
if(y>y1)return y1;
return y;
}
public int getWidth() {
return Math.abs(x-x1);
}
public int getHeight() {
return Math.abs(y-y1);
}
}
Line 文件代码：
import java.awt.Color;
import java.awt.Graphics;
public class Line extends Shape {
public void draw(Graphics g) {
//System.out.println("draw line");
Color currcolor=g.getColor();
g.setColor(c);
g.drawLine(x, y, x1, y1);
g.setColor(currcolor);
}
}
Rec 文件代码：
import java.awt.Color;
import java.awt.Graphics;
public class Rec extends Shape {
public void draw(Graphics g) {
Color currcolor=g.getColor();
g.setColor(c);
if(this.fill==true){
g.fill3DRect(this.getDrawX(),this.getDrawY(), this.getWidth(), this.getHeight(), true);
}
else
g.draw3DRect(this.getDrawX(),this.getDrawY(), this.getWidth(), this.getHeight(), true);
g.setColor(currcolor);
}
}
Word 文件代码：
import java.awt.Color;
import java.awt.Graphics;
public class Word extends Shape {
public void draw(Graphics g) {
Color currcolor=g.getColor();
g.setColor(c);
g.drawString(str, x, y);
System.out.println("word");
g.setColor(currcolor);
}
}
