import javaawt;
import javaawtevent;
import javautil;
import javaxswing;
import javaawtgeom;
import javaio;
import javasqlConnection;
class Point implements Serializable
{
int x,y;
Color col;
int tool;
int boarder;
Point(int x, int y, Color col, int tool, int boarder)
{
thisx = x;
thisy = y;
thiscol = col;
thistool = tool;
thisboarder = boarder;
}
}
class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener
{
int x = -1, y = -1;
int con = 1;//画笔大小
int Econ = 5;//橡皮大小
int toolFlag = 0;//toolFlag:工具标记
//toolFlag工具对应表：
//（0--画笔）；（1--橡皮）；（2--清除）；
//（3--直线）；（4--圆）；（5--矩形）；
Color c = new Color(0,0,0); //画笔颜色
BasicStroke size = new BasicStroke(con,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);//画笔粗细
Point cutflag = new Point(-1, -1, c, 6, con);//截断标志
Vector paintInfo = null;//点信息向量组
int n = 1;
FileInputStream picIn = null;
FileOutputStream picOut = null;
ObjectInputStream VIn = null;
ObjectOutputStream VOut = null;
// 工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除/
Panel toolPanel;
Button eraser, drLine,drCircle,drRect;
Button clear ,pen;
Choice ColChoice,SizeChoice,EraserChoice;
Button colchooser;
Label 颜色,大小B,大小E;
//保存功能
Button openPic,savePic;
FileDialog openPicture,savePicture;
paintboard(String s)
{
super(s);
addMouseMotionListener(this);
addMouseListener(this);
paintInfo = new Vector();
/各工具按钮及选择项/
//颜色选择
ColChoice = new Choice();
ColChoiceadd("black");
ColChoiceadd("red");
ColChoiceadd("blue");
ColChoiceadd("green");
ColChoiceaddItemListener(this);
//画笔大小选择
SizeChoice = new Choice();
SizeChoiceadd("1");
SizeChoiceadd("3");
SizeChoiceadd("5");
SizeChoiceadd("7");
SizeChoiceadd("9");
SizeChoiceaddItemListener(this);
//橡皮大小选择
EraserChoice = new Choice();
EraserChoiceadd("5");
EraserChoiceadd("9");
EraserChoiceadd("13");
EraserChoiceadd("17");
EraserChoiceaddItemListener(this);
////////////////////////////////////////////////////
toolPanel = new Panel();
clear = new Button("清除");
eraser = new Button("橡皮");
pen = new Button("画笔");
drLine = new Button("画直线");
drCircle = new Button("画圆形");
drRect = new Button("画矩形");
openPic = new Button("打开图画");
savePic = new Button("保存图画");
colchooser = new Button("显示调色板");
//各组件事件监听
clearaddActionListener(this);
eraseraddActionListener(this);
penaddActionListener(this);
drLineaddActionListener(this);
drCircleaddActionListener(this);
drRectaddActionListener(this);
openPicaddActionListener(this);
savePicaddActionListener(this);
colchooseraddActionListener(this);
颜色 = new Label("画笔颜色",LabelCENTER);
大小B = new Label("画笔大小",LabelCENTER);
大小E = new Label("橡皮大小",LabelCENTER);
//面板添加组件
toolPaneladd(openPic);
toolPaneladd(savePic);
toolPaneladd(pen);
toolPaneladd(drLine);
toolPaneladd(drCircle);
toolPaneladd(drRect);
toolPaneladd(颜色); toolPaneladd(ColChoice);
toolPaneladd(大小B); toolPaneladd(SizeChoice);
toolPaneladd(colchooser);
toolPaneladd(eraser);
toolPaneladd(大小E); toolPaneladd(EraserChoice);
toolPaneladd(clear);
//工具面板到APPLET面板
add(toolPanel,BorderLayoutNORTH);
setBounds(60,60,900,600); setVisible(true);
validate();
//dialog for save and load
openPicture = new FileDialog(this,"打开图画",FileDialogLOAD);
openPicturesetVisible(false);
savePicture = new FileDialog(this,"保存图画",FileDialogSAVE);
savePicturesetVisible(false);
openPictureaddWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{ openPicturesetVisible(false); }
});
savePictureaddWindowListener(new WindowAdapter()
{
@Override
public void windowClosing(WindowEvent e)
{ savePicturesetVisible(false); }
});
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{ Systemexit(0);}
});
}
public void paint(Graphics g)
{
Graphics2D g2d = (Graphics2D)g;
Point p1,p2;
n = paintInfosize();
if(toolFlag==2)
gclearRect(0,0,getSize()width,getSize()height);//清除
for(int i=0; i<n ;i++){
p1 = (Point)paintInfoelementAt(i);
p2 = (Point)paintInfoelementAt(i+1);
size = new BasicStroke(p1boarder,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);
g2dsetColor(p1col);
g2dsetStroke(size);
if(p1tool==p2tool)
{
switch(p1tool)
{
case 0://画笔
Line2D line1 = new Line2DDouble(p1x, p1y, p2x, p2y);
g2ddraw(line1);
break;
case 1://橡皮
gclearRect(p1x, p1y, p1boarder, p1boarder);
break;
case 3://画直线
Line2D line2 = new Line2DDouble(p1x, p1y, p2x, p2y);
g2ddraw(line2);
break;
case 4://画圆
Ellipse2D ellipse = new Ellipse2DDouble(p1x, p1y, Mathabs(p2x-p1x) , Mathabs(p2y-p1y));
g2ddraw(ellipse);
break;
case 5://画矩形
Rectangle2D rect = new Rectangle2DDouble(p1x, p1y, Mathabs(p2x-p1x) , Mathabs(p2y-p1y));
g2ddraw(rect);
break;
case 6://截断，跳过
i=i+1;
break;
default :
}//end switch
}//end if
}//end for
}
public void itemStateChanged(ItemEvent e)
{
if(egetSource()==ColChoice)//预选颜色
{
String name = ColChoicegetSelectedItem();
switch (name) {
case "black":
c = new Color(0,0,0);
break;
case "red":
c = new Color(255,0,0);
break;
case "green":
c = new Color(0,255,0);
break;
case "blue":
c = new Color(0,0,255);
break;
}
}
else if(egetSource()==SizeChoice)//画笔大小
{
String selected = SizeChoicegetSelectedItem();
switch (selected) {
case "1":
con = 1;
size = new BasicStroke(con,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);
break;
case "3":
con = 3;
size = new BasicStroke(con,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);
break;
case "5":
con = 5;
size = new BasicStroke(con,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);
break;
case "7":
con = 7;
size = new BasicStroke(con,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);
break;
case "9":
con = 9;
size = new BasicStroke(con,BasicStrokeCAP_BUTT,BasicStrokeJOIN_BEVEL);
break;
}
}
else if(egetSource()==EraserChoice)//橡皮大小
{
String Esize = EraserChoicegetSelectedItem();
if(Esize=="5")
{ Econ = 52; }
else if(Esize=="9")
{ Econ = 92; }
else if(Esize=="13")
{ Econ = 132; }
else if(Esize=="17")
{ Econ = 173; }
}
}
public void mouseDragged(MouseEvent e)
{
Point p1 ;
switch(toolFlag){
case 0://画笔
x = (int)egetX();
y = (int)egetY();
p1 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p1);
repaint();
break;
case 1://橡皮
x = (int)egetX();
y = (int)egetY();
p1 = new Point(x, y, null, toolFlag, Econ);
paintInfoaddElement(p1);
repaint();
break;
default :
}
}
public void mouseMoved(MouseEvent e) {}
public void update(Graphics g)
{
paint(g);
}
public void mousePressed(MouseEvent e)
{
Point p2;
switch(toolFlag){
case 3://直线
x = (int)egetX();
y = (int)egetY();
p2 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p2);
break;
case 4: //圆
x = (int)egetX();
y = (int)egetY();
p2 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p2);
break;
case 5: //矩形
x = (int)egetX();
y = (int)egetY();
p2 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p2);
break;
default :
}
}
public void mouseReleased(MouseEvent e)
{
Point p3;
switch(toolFlag){
case 0://画笔
paintInfoaddElement(cutflag);
break;
case 1: //eraser
paintInfoaddElement(cutflag);
break;
case 3://直线
x = (int)egetX();
y = (int)egetY();
p3 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p3);
paintInfoaddElement(cutflag);
repaint();
break;
case 4: //圆
x = (int)egetX();
y = (int)egetY();
p3 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p3);
paintInfoaddElement(cutflag);
repaint();
break;
case 5: //矩形
x = (int)egetX();
y = (int)egetY();
p3 = new Point(x, y, c, toolFlag, con);
paintInfoaddElement(p3);
paintInfoaddElement(cutflag);
repaint();
break;
default:
}
}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void actionPerformed(ActionEvent e)
{
if(egetSource()==pen)//画笔
{toolFlag = 0;}
if(egetSource()==eraser)//橡皮
{toolFlag = 1;}
if(egetSource()==clear)//清除
{
toolFlag = 2;
paintInforemoveAllElements();
repaint();
}
if(egetSource()==drLine)//画线
{toolFlag = 3;}
if(egetSource()==drCircle)//画圆
{toolFlag = 4;}
if(egetSource()==drRect)//画矩形
{toolFlag = 5;}
if(egetSource()==colchooser)//调色板
{
Color newColor = JColorChoosershowDialog(this,"调色板",c);
c = newColor;
}
if(egetSource()==openPic)//打开图画
{
openPicturesetVisible(true);
if(openPicturegetFile()!=null)
{
int tempflag;
tempflag = toolFlag;
toolFlag = 2 ;
repaint();
try{
paintInforemoveAllElements();
File filein = new File(openPicturegetDirectory(),openPicturegetFile());
picIn = new FileInputStream(filein);
VIn = new ObjectInputStream(picIn);
paintInfo = (Vector)VInreadObject();
VInclose();
repaint();
toolFlag = tempflag;
}
catch(ClassNotFoundException IOe2)
{
repaint();
toolFlag = tempflag;
Systemoutprintln("can not read object");
}
catch(IOException IOe)
{
repaint();
toolFlag = tempflag;
Systemoutprintln("can not read file");
}
}
}
if(egetSource()==savePic)//保存图画
{
savePicturesetVisible(true);
try{
File fileout = new File(savePicturegetDirectory(),savePicturegetFile());
picOut = new FileOutputStream(fileout);
VOut = new ObjectOutputStream(picOut);
VOutwriteObject(paintInfo);
VOutclose();
}
catch(IOException IOe)
{
Systemoutprintln("can not write object");
}
}
}
}//end paintboard
public class Pb
{
public static void main(String args[])
{ new paintboard("画图程序"); }
}
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