Drawing program __javaio of Javaswing graphic interface programming

Package three.day.frame;

Import java.awt.*;
Import java.awt.event.*;
Import java.awt.geom.*;
Import java.io.*;
Import java.util.*;
Import javax.swing.*;


Class Point1 implements Serializable {
int x, position of y;//mouse
Color col;//Paint Selected colors
int tool;//Paint Select which graphic to draw
int boarder;//line width


Point1 (int x, int y, Color col, int tool, int boarder) {
this.x = x;
This.y = y;
This.col = col;
This.tool = tool;
This.boarder = boarder;
}
}


Class Paintboard1 extends Frame implements ActionListener, Mousemotionlistener,
MouseListener, ItemListener {
int x =-1, y = -1;//Initialize mouse position
int con = 1;//brush size
int Econ = 5;//Eraser Size


int toolflag = 0;//toolflag: Tool tag
Toolflag tool corresponding Table:
(0--brush); (1--eraser); (2--clear);
(3--line); (4--circle); (5--rectangle);


Color c = new color (0, 0, 0); Brush color
Basicstroke size = new Basicstroke (Con, Basicstroke.cap_butt,
Basicstroke.join_bevel);//Brush thickness
Point1 Cutflag = new Point1 ( -1,-1, C, 6, con);/TRUNCATE flag


Vector paintinfo = null;//point Information Vectors Group
int n = 1;


FileInputStream picin = null;
FileOutputStream picout = null;


ObjectInputStream VIn = null;
ObjectOutputStream VOut = null;


* Tool Panel--brushes, lines, circles, rectangles, polygons, erasers, clear/
Panel Toolpanel;
Button Eraser, Drline, drcircle, Drrect;
Button Clear, pen;
Choice Colchoice, Sizechoice, Eraserchoice;
Button Colchooser;
Label color, size b, size E;
Save feature
Button Openpic, Savepic;
FileDialog openpicture, SavePicture;


Paintboard1 (String s) {
Super (s);
Addmousemotionlistener (this);
Addmouselistener (this);


Paintinfo = new Vector ();


/* All tools buttons and options * *
Color selection
Colchoice = new Choice ();
Colchoice.add ("Black");
Colchoice.add ("Red");
Colchoice.add ("Blue");
Colchoice.add ("green");
Colchoice.additemlistener (this);
Brush size Selection
Sizechoice = new Choice ();
Sizechoice.add ("1");
Sizechoice.add ("3");
Sizechoice.add ("5");
Sizechoice.add ("7");
Sizechoice.add ("9");
Sizechoice.additemlistener (this);
Eraser Size Selection
Eraserchoice = new Choice ();
Eraserchoice.add ("5");
Eraserchoice.add ("9");
Eraserchoice.add ("13");
Eraserchoice.add ("17");
Eraserchoice.additemlistener (this);
// //////////////////////////////////////////////////
Toolpanel = new Panel ();


Clear = New button ("purge");
Eraser = New button ("Eraser");
Pen = New button ("brush");
Drline = New button ("Draw straight line");
drcircle = New button ("Draw Round");
Drrect = New button ("Draw rectangle");


Openpic = New button ("Open drawing");
Savepic = New button ("Save Picture");


Colchooser = New button ("Display palette");


Individual component Event Monitoring
Clear.addactionlistener (this);
Eraser.addactionlistener (this);
Pen.addactionlistener (this);
Drline.addactionlistener (this);
Drcircle.addactionlistener (this);
Drrect.addactionlistener (this);
Openpic.addactionlistener (this);
Savepic.addactionlistener (this);
Colchooser.addactionlistener (this);


color = new Label ("Brush Color", label.center);
Size B = new Label ("Brush size", label.center);
Size E = new Label ("Eraser Size", label.center);
Panel Add component
Toolpanel.add (Openpic);
Toolpanel.add (Savepic);


Toolpanel.add (pen);
Toolpanel.add (Drline);
Toolpanel.add (drcircle);
Toolpanel.add (Drrect);


Toolpanel.add (color);
Toolpanel.add (Colchoice);
Toolpanel.add (size B);
Toolpanel.add (Sizechoice);
Toolpanel.add (Colchooser);


Toolpanel.add (Eraser);
Toolpanel.add (size e);
Toolpanel.add (Eraserchoice);


Toolpanel.add (Clear);
Tool Panel to Applet panel
Add (Toolpanel, Borderlayout.north);


SetBounds (230, 50, 900, 650);
SetVisible (TRUE);
Validate ();
dialog for Save and load


Openpicture = new FileDialog (This, "open drawing", filedialog.load);
Openpicture.setvisible (FALSE);
SavePicture = new FileDialog (this, "Save Picture", Filedialog.save);
Savepicture.setvisible (FALSE);


Openpicture.addwindowlistener (New Windowadapter () {
public void windowclosing (WindowEvent e) {
Openpicture.setvisible (FALSE);
}
});


Savepicture.addwindowlistener (New Windowadapter () {
public void windowclosing (WindowEvent e) {
Savepicture.setvisible (FALSE);
}
});


Addwindowlistener (New Windowadapter () {
public void windowclosing (WindowEvent e) {
System.exit (0);
}
});


}


public void Paint (Graphics g) {
System.out.println ("Paint");
Graphics2D g2d = (graphics2d) g;


Point1 P1, p2;


n = paintinfo.size ();


if (Toolflag = 2)
G2d.clearrect (0, 0, GetSize (). width-100, GetSize (). height-100);/clear


for (int i = 0; i < n-1; i++) {
P1 = (Point1) paintinfo.elementat (i);
P2 = (Point1) paintinfo.elementat (i + 1);
size = new Basicstroke (P1.boarder, Basicstroke.cap_butt,
Basicstroke.join_bevel);


G2d.setcolor (P1.col);
G2d.setstroke (size);


if (P1.tool = = P2.tool) {
Switch (p1.tool) {
Case 0://Brushes


Line2D line1 = new Line2d.double (p1.x, P1.y, p2.x, P2.Y);
G2d.draw (line1);
Break


Case 1://Eraser
G.clearrect (p1.x, P1.y, P1.boarder, P1.boarder);
Break


Case 3://draw a straight line
Line2D line2 = new Line2d.double (p1.x, P1.y, p2.x, P2.Y);
G2d.draw (line2);
Break


Case 4://Draw Circle
ellipse2d ellipse = new Ellipse2d.double (p1.x, P1.Y,
Math.Abs (p2.x-p1.x), Math.Abs (P2.Y-P1.Y));
G2d.draw (ellipse);
Break


Case 5://Draw a rectangle
Rectangle2D rect = new Rectangle2d.double (p1.x, P1.Y,
Math.Abs (p2.x-p1.x), Math.Abs (P2.Y-P1.Y));
G2d.draw (rect);
Break


Case 6://truncated, skipped
i = i + 1;
Break


Default
}//End Switch
}//End If
}//End for
}


public void itemstatechanged (ItemEvent e) {
System.out.println ("itemstatechanged");
if (e.getsource () = = colchoice)/Preselection color
{
String name = Colchoice.getselecteditem ();


if (name = = "Black") {
c = new Color (0, 0, 0);
else if (name = = "Red") {
c = new Color (255, 0, 0);
else if (name = = "Green") {
c = new Color (0, 255, 0);
else if (name = = "Blue") {
c = new Color (0, 0, 255);
}
else if (e.getsource () = = Sizechoice)//Brush size
{
String selected = Sizechoice.getselecteditem ();


if (selected = = "1") {
con = 1;
size = new Basicstroke (Con, Basicstroke.cap_butt,
Basicstroke.join_bevel);


else if (selected = "3") {
con = 3;
size = new Basicstroke (Con, Basicstroke.cap_butt,
Basicstroke.join_bevel);


else if (selected = "5") {
con = 5;
size = new Basicstroke (Con, Basicstroke.cap_butt,
Basicstroke.join_bevel);


else if (selected = "7") {
con = 7;
size = new Basicstroke (Con, Basicstroke.cap_butt,
Basicstroke.join_bevel);


else if (selected = "9") {
con = 9;
size = new Basicstroke (Con, Basicstroke.cap_butt,
Basicstroke.join_bevel);


}
else if (e.getsource () = = Eraserchoice)//Eraser Size
{
String esize = Eraserchoice.getselecteditem ();


if (esize = = "5") {
Econ = 5 * 2;
else if (esize = "9") {
Econ = 9 * 2;
else if (esize = "13") {
Econ = 13 * 2;
else if (esize = "17") {
Econ = 17 * 3;
}


}


}


public void mousedragged (MouseEvent e) {
System.out.println ("mousedragged");
Point1 P1;
Switch (Toolflag) {
Case 0://Brushes
x = (int) e.getx ();
y = (int) e.gety ();
P1 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p1);
Repaint ();
Break


Case 1://Eraser
x = (int) e.getx ();
y = (int) e.gety ();
P1 = new Point1 (x, y, NULL, Toolflag, Econ);
Paintinfo.addelement (p1);
Repaint ();
Break


Default
}
}


public void mousemoved (MouseEvent e) {
}


public void Update (Graphics g) {
SYSTEM.OUT.PRINTLN ("Update");
Paint (g);
}


public void mousepressed (MouseEvent e) {
System.out.println ("mousepressed");
Point1 P2;
Switch (Toolflag) {
Case 3://Line
x = (int) e.getx ();
y = (int) e.gety ();
P2 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p2);
Break


Case 4://Round
x = (int) e.getx ();
y = (int) e.gety ();
P2 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p2);
Break


Case 5://Rectangle
x = (int) e.getx ();
y = (int) e.gety ();
P2 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p2);
Break


Default
}
}


public void mousereleased (MouseEvent e) {
System.out.println ("mousereleased");
Point1 P3;
Switch (Toolflag) {
Case 0://brushes
Paintinfo.addelement (Cutflag);
Break


Case 1://Eraser
Paintinfo.addelement (Cutflag);
Break


Case 3://Straight Line
x = (int) e.getx ();
y = (int) e.gety ();
P3 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p3);
Paintinfo.addelement (Cutflag);
Repaint ();
Break


Case 4://Round
x = (int) e.getx ();
y = (int) e.gety ();
P3 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p3);
Paintinfo.addelement (Cutflag);
Repaint ();
Break


Case 5://Rectangle
x = (int) e.getx ();
y = (int) e.gety ();
P3 = new Point1 (x, Y, C, toolflag, con);
Paintinfo.addelement (p3);
Paintinfo.addelement (Cutflag);
Repaint ();
Break


Default
}
}


public void mouseentered (MouseEvent e) {
}


public void mouseexited (MouseEvent e) {
}


public void mouseclicked (MouseEvent e) {
}


public void actionperformed (ActionEvent e) {
System.out.println ("actionperformed");
if (e.getsource () = = pen)//Brush
{
System.out.println ("pen");
Toolflag = 0;
}


if (e.getsource () = = eraser)//Eraser
{
System.out.println ("Eraser");
Toolflag = 1;
}


if (e.getsource () = clear)//purge
{
System.out.println ("clear");
Toolflag = 2;
Paintinfo.removeallelements ();
Repaint ();
}


if (e.getsource () = = Drline)//Draw line
{
System.out.println ("Drline");
Toolflag = 3;
}


if (e.getsource () = = drcircle)//Draw Circle
{
System.out.println ("drcircle");
Toolflag = 4;
}


if (e.getsource () = = Drrect)//Draw a rectangle
{
System.out.println ("Drrect");
Toolflag = 5;
}


if (e.getsource () = = Colchooser)//Palette
{
System.out.println ("Colchooser");
Color Newcolor = Jcolorchooser.showdialog (This, "My palette", C);
c = Newcolor;
}


if (e.getsource () = = openpic)//Open drawing
{


Openpicture.setvisible (TRUE);


if (openpicture.getfile ()!= null) {
int Tempflag;
Tempflag = Toolflag;
Toolflag = 2;
Repaint ();


try {
Paintinfo.removeallelements ();
File Filein = new file (Openpicture.getdirectory (),
Openpicture.getfile ());
Picin = new FileInputStream (Filein);
VIn = new ObjectInputStream (picin);
Paintinfo = (Vector) vin.readobject ();
Vin.close ();
Repaint ();
Toolflag = Tempflag;


}


catch (ClassNotFoundException IOe2) {
Repaint ();
Toolflag = Tempflag;
System.out.println ("Can not read object");
catch (IOException IOe) {
Repaint ();
Toolflag = Tempflag;
System.out.println ("Can not read file");
}
}


}


if (e.getsource () = = Savepic)//Save Picture
{
Savep