MouseMoved - problem
Hi,
i've got a little problem concerning mouse handling:
Nothing happens when I check whether the mouse moves in a GlCanvas. Here the code:
@Override
public void mouseEntered(MouseEvent e)
super.mouseEntered(e);
System.out.println("MOUSE ENTERED");
@Override
public void mouseMoved(MouseEvent e)
super.mouseMoved(e);
System.out.println("MOUSE MOVED");
...When I enter in the GLCanvas with my mouse cursor, it runs fine: "MOUSE ENTERED " is shown
but when i move the mouse in the GLCanvas, nothing happens. I think that's very strange^^
Do You have a solution?
thanks
christoph
Edited by: Fachmann on Feb 23, 2010 9:31 AM
public class Listener implements GLEventListener, MouseMotionListener, MouseListenerIt's MouseListener and MouseMotionListener
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Please, for your own good, take a break from whatever it is you're working on and go through The Java™ Tutorials: [Creating a GUI with JFC/Swing|http://java.sun.com/docs/books/tutorial/uiswing/TOC.html]
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fromserver.append(msg+"\n");
public void SendCanvasObject(String str)
this.str = str;
fromserver.append(str + "\n");
Graphics g = canvas.getGraphics();
paint(g);
// Actionlistener //
public void actionPerformed(ActionEvent e)
if(e.getSource()==connect)
connect();
if(connected)
servername.setEnabled(false);
serverport.setEnabled(false);
username.setEnabled(false);
connect.setEnabled(false);
Coord = "";
else
if(e.getSource()==disconnect)
disconnect();
servername.setEnabled(true);
serverport.setEnabled(true);
username.setEnabled(true);
connect.setEnabled(true);
else
if(e.getSource()==send)
flag = true;
if(service==null)
return;
try
fromserver.append("Sending an image...\n");
service.SendCanvasObject(this,Coord);
i=0;
for(j=0;j<1000;j++)
x[j]=0;
y[j]=0;
Coord = "";
fromserver.append("\n" + "Image Sent...");
catch(RemoteException re)
fromserver.append("Error Sending Message ...\n" + re);
catch(Exception ee)
fromserver.append("Error Sending Message ...\n" + ee);
else
if(e.getSource()==sendText)
if(service==null)
return;
try
service.sendMessage(this,message.getText());
message.setText("");
catch(RemoteException exp)
fromserver.append("Remote Error Sending Message ...\n" + exp);
catch(Exception ee)
fromserver.append("Error Sending Message ...\n" + ee);
public void paint(Graphics g)
if(flag==true)
i=0;
StringTokenizer stoken = new StringTokenizer(str,"r");
String strin = "";
while(stoken.hasMoreTokens())
strin = stoken.nextToken();
fromserver.append("\n" + strin + "\n");
StringTokenizer stoken1 = new StringTokenizer(strin," ");
String strin1 = "";
j=0;
while(stoken1.hasMoreTokens())
strin1 = stoken1.nextToken();
fromserver.append("\n" + strin1 + "\n");
x[j]=Integer.parseInt(strin1.substring(0,strin1.indexOf(",")));
y[j]=Integer.parseInt(strin1.substring(strin1.indexOf(",")+1,strin1.length()));
j++;
for(int k=0;k<j-1;k++)
g.drawLine(x[k],y[k],x[k+1],y[k+1]);
i++;
import java.rmi.*;
import java.rmi.server.*;
import canvas.Drawer;
import java.util.*;
import ru.zhuk.graphics.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class FrameApplet extends Applet implements ActionListener
ChatClient f;
public void init()
Button b = new Button("Start Chat");
b.addActionListener(this);
add(b);
public void actionPerformed(ActionEvent ae)
f=new ChatClient("Chat");
f.show();
f.setSize(400,400);
here is html file which i calls from IE
<html>
<title>Micky Chat</title>
<body>
<br>
<br>
<center>
<applet code="FrameApplet.class" width=200 height=200>
</applet>
</center>
</body>
</html>
and at last a shocking thing is it is runs in Netscape displaying frames but not calling paint method.
pls. help me
thanks a lot
umeshHi Umesh!
Sorry that I cannot be too concrete about that since it has to be centuries ago when I fell over this problem.
As far as I can remember, the JDK provided by MS has no RMI built-in. These was probably one of the main reasons why Sun sued Microsoft concering its handling of Java.
Afterwards MS released a path for its Java Runtime that included RMI support, but AFAIK they never included it in the standard package. So much luck when searching for the ZIP! (-;
A little bit of googling might help, e.g.:
http://groups.google.com/groups?hl=de&lr=&ie=UTF-8&oe=UTF-8&threadm=37f8ddf6.4532124%40news.online.no&rnum=17&prev=/groups%3Fq%3Dmicrosoft%2Bjvm%2Brmi%2Bsupport%26start%3D10%26hl%3Dde%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26selm%3D37f8ddf6.4532124%2540news.online.no%26rnum%3D17
cheers,
kdi -
Having a problem saving the graphics on a canvas.
I'm having a problem saving graphics on a canvas. It draws on the canvas but when another window comes up the graphics disappear. I put in a method to take the graphics on the canvas and repaint it with the graphics. But this comes up blank. So I don't know why this is happening. It is probably the paint method but I don't know why. If anyone has any ideas could you please respond because I have had this problem for ages now and it's driving me mad and I have to get this finished or I'm going to be a lot of trouble. I'll show you the code for the class I am concerned with. It is long but most of it can be disregarded. The only parts which are relevent are the paint method and where the drawline e.t.c are called which is in the mouse release
package com.project.CSSE4;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.ImageFilter;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.io.*;
import java.util.*;
import java.net.*;
import javax.swing.*;
import java.sql.*;
public class CanvasOnly extends JPanel
implements MouseListener, MouseMotionListener
public static final int line = 1;
public static final int freehand = 2;
public static final int text = 3;
public static final int mode_paint = 0;
public static final int mode_xor = 1;
public Color drawColor;
public int drawThickness = 1;
public int drawType = 0;
public boolean fill = false;
private boolean dragging = false;
public int oldx = 0;
public int oldy = 0;
private int rectangleWidth;
private int rectangleHeight;
private tempLine draftLine;
private tempText draftText;
public Canvas pad;
public static final Font defaultFont =
new Font("Helvetica", Font.BOLD, 14);
protected boolean floatingText = false;
boolean showingPicture;
protected Image offScreen;
public JTextArea coor;
public JButton writeIn;
Connection connection;
String codeLine;
int x = 0;
int y = 0;
public CanvasOnly()
try
Class.forName("com.mysql.jdbc.Driver").newInstance();
}catch( Exception e)
System.err.println("Unable to find and load driver");
System.exit(1);
pad = new Canvas();
pad.setBackground(Color.white);
pad.setVisible(true);
pad.setSize(400, 400);
coor = new JTextArea(15, 15);
writeIn = new JButton("load TExt");
writeIn.addActionListener(new ActionListener()
public void actionPerformed(ActionEvent event1)
try
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery("SELECT * FROM submit WHERE file_name = 'cmd.java'");
rs.next();
String one1 = rs.getString("student_id");
//System.out.println("one1 :" + one1);
String two1 = rs.getString("file_name");
//System.out.println("two1 : " + two1);
InputStream textStream = rs.getAsciiStream("file");
BufferedReader textReader = new BufferedReader(
new InputStreamReader(textStream));
codeLine = textReader.readLine();
x = 0;
y = -12;
while(codeLine != null)
y = y + 12;
//fileText.append( line + "\n");
//canvasPad.drawTheString(line, x, y);
drawText(Color.black, x, y, codeLine, mode_paint);
codeLine = textReader.readLine();
textReader.close();
pad.setSize(400, y);
Timestamp three1 = rs.getTimestamp("ts");
//System.out.println(three1);
textReader.close();
rs.close();
}catch (SQLException e)
System.err.println(e);
catch(IOException ioX)
System.err.println(ioX);
//setSize(300,300);
drawColor = Color.black;
pad.addMouseListener(this);
pad.addMouseMotionListener(this);
offScreen = null;
public Image getContents()
// Returns the contents of the canvas as an Image. Only returns
// the portion which is actually showing on the screen
// If the thing showing on the canvas is a picture, just send back
// the picture
if (showingPicture)
return (offScreen);
ImageFilter filter =
new CropImageFilter(0, 0, getWidth(), getHeight());
Image newImage =
createImage(new FilteredImageSource(offScreen.getSource(),
filter));
return(newImage);
public void setImage(Image theImage)
// Fit it to the canvas
offScreen = theImage;
repaint();
showingPicture = true;
synchronized public void paint(Graphics g)
int width = 0;
int height = 0;
//The images are stored on an off screen buffer.
//offScreen is the image declared at top
if (offScreen != null)
//intislise the widt and heigth depending on if showingpicture is true
if (!showingPicture)
width = offScreen.getWidth(this);
height = offScreen.getHeight(this);
//width = getWidth(this);
//height = getHeight(this); //offScreen
else
//width = pad.getSize().width;
//height = getSize().height;
width = pad.getWidth();
//width = getSize().width;
height = pad.getHeight();
//height = getSize().height;
//Draws as much of the specified image as has already
//been scaled to fit inside the specified rectangle
//The "this" is An asynchronous update interface for receiving
//notifications about Image information as the Image is constructed
//This is causing problems
g.drawImage(offScreen, 0, 0, width, height, pad);
g.dispose();
//clear the canvas with this method
synchronized public void clear()
// The maximum size of the usable drawing canvas, for now, will be
// 1024x768
offScreen = createImage(1024, 768);
//Creates an off-screen drawable image to be used for double buffering
pad.setBackground(Color.white);
//Set the showingPicture to false for paint method
showingPicture = false;
repaint();
synchronized public void drawLine(Color color, int startx, int starty,
int endx, int endy, int thickness,
int mode)
int dx, dy;
Graphics g1 = pad.getGraphics();
Graphics g2;
//if image is not intialised to null
//the getGraphics is used for freehand drawing
//Image.getGraphics() is often used for double buffering by rendering
//into an offscreen buffer.
if (offScreen != null)
g2 = offScreen.getGraphics();
else
g2 = g1;
//mode is put into the method and XOR is final and equal to 1
if (mode == this.mode_xor)
//calls the setXOR mode for g1 and g2
//Sets the paint mode of this graphics context to alternate
//between this graphics context's current color and the
//new specified color.
g1.setXORMode(Color.white);//This will
g2.setXORMode(Color.white);
else
//Sets this graphics context's current color to the
//specified color
g1.setColor(color);
g2.setColor(color);
if (endx > startx)
dx = (endx - startx);
else
dx = (startx - endx);
if (endy > starty)
dy = (endy - starty);
else
dy = (starty - endy);
if (dx >= dy)
starty -= (thickness / 2);
endy -= (thickness / 2);
else
startx -= (thickness / 2);
endx -= (thickness / 2);
for (int count = 0; count < thickness; count ++)
g1.drawLine(startx, starty, endx, endy);
g2.drawLine(startx, starty, endx, endy);
if (dx >= dy)
{ starty++; endy++; }
else
{ startx++; endx++; }
//Disposes of this graphics context and releases any system
//resources that it is using.
g1.dispose();
g2.dispose();
//This method is not causing trouble
synchronized public void drawText(Color color, int x, int y,
String text, int mode)
Graphics g1 = pad.getGraphics();
Graphics g2;
if (offScreen != null)
g2 = offScreen.getGraphics();
else
g2 = g1;
if (mode == this.mode_xor)
g1.setXORMode(Color.white);
g2.setXORMode(Color.white);
else
g1.setColor(color);
g2.setColor(color);
g1.setFont(new Font("Times Roman", Font.PLAIN, 10));
g2.setFont(new Font("Times Roman", Font.PLAIN, 10));
g1.drawString(text, x, y);
g2.drawString(text, x, y);
g1.dispose();
g2.dispose();
//connect to database
public void connectToDB()
try
connection = DriverManager.getConnection(
"jdbc:mysql://localhost/submissions?user=root&password=football");
//may have to load in a username and password
//code "?user=spider&password=spider"
}catch(SQLException connectException)
System.out.println("Unable to connect to db");
System.exit(1);
//use this method to instatiate connectToDB method
public void init()
connectToDB();
protected void floatText(String text)
draftText = new tempText(this.drawColor,
this.oldx,
this.oldy,
text);
this.floatingText = true;
//nothing happens when the mouse is clicked
public void mouseClicked(MouseEvent e)
//When the mouse cursor enters the canvas make it the two
//straigth lines type
public void mouseEntered(MouseEvent e)
pad.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
//When mouse exits canvas set to default type
public void mouseExited(MouseEvent E)
pad.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
//used for creating the shapes and positioning thetext
public void mousePressed(MouseEvent e)
// Save the coordinates of the mouse being pressed
oldx = e.getX();
oldy = e.getY();
// If we are doing lines, rectangles, or ovals, we will show
// draft lines to suggest the final shape of the object
//Draw type is a publc int which can be changed
if (drawType == this.line)
draftLine = new tempLine(drawColor, oldx, oldy, oldx,
oldy, drawThickness);
// Set the draw mode to XOR and draw it.
drawLine(draftLine.color, draftLine.startx,
draftLine.starty, draftLine.endx,
draftLine.endy, drawThickness, this.mode_xor);
//mouse listener for when the mouse button is released
public void mouseReleased(MouseEvent e)
if (drawType == this.line)
// Erase the draft line
drawLine(draftLine.color, draftLine.startx, draftLine.starty,
draftLine.endx, draftLine.endy, drawThickness,
this.mode_xor);
// Add the real line to the canvas
//When the imput changes to "mode_paint" it is drawen
//on the canvas
drawLine(drawColor, oldx, oldy, e.getX(), e.getY(),
drawThickness, this.mode_paint);
dragging = false;
else if (drawType == this.text)
if (floatingText)
// The user wants to place the text (s)he created.
// Erase the old draft text
drawText(drawColor, draftText.x, draftText.y,
draftText.text, this.mode_xor);
String str = Integer.toString(e.getX());
String str1 = Integer.toString(e.getY());
coor.append(str + " " + str1 + "\n");
// Set the new coordinates
draftText.x = e.getX();
draftText.y = e.getY();
// Draw the permanent text
drawText(drawColor, draftText.x, draftText.y,
draftText.text, this.mode_paint);
floatingText = false;
public void mouseDragged(MouseEvent e)
if (drawType == this.freehand)
drawLine(drawColor, oldx, oldy, e.getX(), e.getY(),
drawThickness, this.mode_paint);
oldx = e.getX();
oldy = e.getY();
else
dragging = true;
if (drawType == this.line)
// Erase the old draft line
drawLine(draftLine.color, draftLine.startx, draftLine.starty,
draftLine.endx, draftLine.endy, drawThickness,
this.mode_xor);
// Draw the new draft line
draftLine.endx = e.getX();
draftLine.endy = e.getY();
drawLine(draftLine.color, draftLine.startx, draftLine.starty,
draftLine.endx, draftLine.endy, drawThickness,
this.mode_xor);
public void mouseMoved(MouseEvent e)
if (floatingText)
// When the user has entered some text to place on the
// canvas, it remains sticky with the cursor until another
// click is entered to place it.
// Erase the old draft text
drawText(drawColor, draftText.x, draftText.y,
draftText.text, this.mode_xor);
// Set the new coordinates
draftText.x = e.getX();
draftText.y = e.getY();
// Draw the new floating text
drawText(drawColor, draftText.x, draftText.y,
draftText.text, this.mode_xor);
//declare a class for the line shown before the is as wanted
class tempLine
public Color color;
public int startx;
public int starty;
public int endx;
public int endy;
public int thickness;
public tempLine(Color mycolor, int mystartx, int mystarty,
int myendx, int myendy, int mythickness)
color = mycolor;
startx = mystartx;
starty = mystarty;
endx = myendx;
endy = myendy;
thickness = mythickness;
class tempText
public Color color;
public int x;
public int y;
public String text;
public tempText(Color mycolor, int myx, int myy, String mytext)
color = mycolor;
x = myx;
y = myy;
text = mytext;
}http://www.java2s.com/ExampleCode/2D-Graphics/DemonstratingUseoftheImageIOLibrary.htm
-
JTable problem...can anybody help me...
hi i have try out some jtable program. I have done some alteration to the table that it can resize row and column via the gridline. but it seems that when i'm resizing through the gridline, the row header did not resize. I sense that the row header not syncronizing with the main table. So when i'm tried to resize, the row header didn't
can you solve my problem...
//the main program
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class Test { public static void main(String[] args)
//row headers:
String[][] rowHeaders = {{"Alpha"},{"Beta"}, {"Gamma"}};
JTable leftTable = new JTable(rowHeaders, new Object[]{""});
leftTable.setDefaultRenderer(
Object.class, leftTable.getTableHeader().getDefaultRenderer());
leftTable.setPreferredScrollableViewportSize(new Dimension(50,100));
//main table:
Object[][] sampleData = {{"Homer", "Simpson"},{"Seymour","Skinner"},{"Ned","Flanders"}};
JTable mainTable = new JTable(sampleData, new Object[]{"",""});
//scroll pane:
JScrollPane sp = new JScrollPane(
mainTable, ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
sp.setRowHeaderView(leftTable);
sp.setColumnHeaderView(null);
new TableColumnResizer(mainTable);
new TableRowResizer(mainTable);
//frame:
final JFrame f = new JFrame("Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(sp);
f.pack();
SwingUtilities.invokeLater(new Runnable(){
public void run(){ f.setLocationRelativeTo(null);
f.setVisible(true); } });
}This the TableColumnResizer.java
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.MouseInputAdapter;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.*;
public class TableColumnResizer extends MouseInputAdapter
public static Cursor resizeCursor = Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR);
private int mouseXOffset;
private Cursor otherCursor = resizeCursor;
private JTable table;
public TableColumnResizer(JTable table){
this.table = table;
table.addMouseListener(this);
table.addMouseMotionListener(this);
private boolean canResize(TableColumn column){
return column != null
&& table.getTableHeader().getResizingAllowed()
&& column.getResizable();
private TableColumn getResizingColumn(Point p){
return getResizingColumn(p, table.columnAtPoint(p));
private TableColumn getResizingColumn(Point p, int column){
if(column == -1){
return null;
int row = table.rowAtPoint(p);
if(row==-1)
return null;
Rectangle r = table.getCellRect(row, column, true);
r.grow( -3, 0);
if(r.contains(p))
return null;
int midPoint = r.x + r.width / 2;
int columnIndex;
if(table.getTableHeader().getComponentOrientation().isLeftToRight())
columnIndex = (p.x < midPoint) ? column - 1 : column;
else
columnIndex = (p.x < midPoint) ? column : column - 1;
if(columnIndex == -1)
return null;
return table.getTableHeader().getColumnModel().getColumn(columnIndex);
public void mousePressed(MouseEvent e){
table.getTableHeader().setDraggedColumn(null);
table.getTableHeader().setResizingColumn(null);
table.getTableHeader().setDraggedDistance(0);
Point p = e.getPoint();
// First find which header cell was hit
int index = table.columnAtPoint(p);
if(index==-1)
return;
// The last 3 pixels + 3 pixels of next column are for resizing
TableColumn resizingColumn = getResizingColumn(p, index);
if(!canResize(resizingColumn))
return;
table.getTableHeader().setResizingColumn(resizingColumn);
if(table.getTableHeader().getComponentOrientation().isLeftToRight())
mouseXOffset = p.x - resizingColumn.getWidth();
else
mouseXOffset = p.x + resizingColumn.getWidth();
private void swapCursor(){
Cursor tmp = table.getCursor();
table.setCursor(otherCursor);
otherCursor = tmp;
public void mouseMoved(MouseEvent e){
if(canResize(getResizingColumn(e.getPoint()))
!= (table.getCursor() == resizeCursor)){
swapCursor();
public void mouseDragged(MouseEvent e){
int mouseX = e.getX();
TableColumn resizingColumn = table.getTableHeader().getResizingColumn();
boolean headerLeftToRight =
table.getTableHeader().getComponentOrientation().isLeftToRight();
if(resizingColumn != null){
int oldWidth = resizingColumn.getWidth();
int newWidth;
if(headerLeftToRight){
newWidth = mouseX - mouseXOffset;
} else{
newWidth = mouseXOffset - mouseX;
resizingColumn.setWidth(newWidth);
Container container;
if((table.getTableHeader().getParent() == null)
|| ((container = table.getTableHeader().getParent().getParent()) == null)
|| !(container instanceof JScrollPane)){
return;
if(!container.getComponentOrientation().isLeftToRight()
&& !headerLeftToRight){
if(table != null){
JViewport viewport = ((JScrollPane)container).getViewport();
int viewportWidth = viewport.getWidth();
int diff = newWidth - oldWidth;
int newHeaderWidth = table.getWidth() + diff;
/* Resize a table */
Dimension tableSize = table.getSize();
tableSize.width += diff;
table.setSize(tableSize);
* If this table is in AUTO_RESIZE_OFF mode and has a horizontal
* scrollbar, we need to update a view's position.
if((newHeaderWidth >= viewportWidth)
&& (table.getAutoResizeMode() == JTable.AUTO_RESIZE_OFF)){
Point p = viewport.getViewPosition();
p.x =
Math.max(0, Math.min(newHeaderWidth - viewportWidth, p.x + diff));
viewport.setViewPosition(p);
/* Update the original X offset value. */
mouseXOffset += diff;
public void mouseReleased(MouseEvent e){
table.getTableHeader().setResizingColumn(null);
table.getTableHeader().setDraggedColumn(null);
} This is TableRowResizer.java
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.MouseInputAdapter;
import java.awt.*;
import java.awt.event.MouseEvent;
public class TableRowResizer extends MouseInputAdapter
public static Cursor resizeCursor = Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR);
private int mouseYOffset, resizingRow;
private Cursor otherCursor = resizeCursor;
private JTable table;
public TableRowResizer(JTable table){
this.table = table;
table.addMouseListener(this);
table.addMouseMotionListener(this);
private int getResizingRow(Point p){
return getResizingRow(p, table.rowAtPoint(p));
private int getResizingRow(Point p, int row){
if(row == -1){
return -1;
int col = table.columnAtPoint(p);
if(col==-1)
return -1;
Rectangle r = table.getCellRect(row, col, true);
r.grow(0, -3);
if(r.contains(p))
return -1;
int midPoint = r.y + r.height / 2;
int rowIndex = (p.y < midPoint) ? row - 1 : row;
return rowIndex;
public void mousePressed(MouseEvent e){
Point p = e.getPoint();
resizingRow = getResizingRow(p);
mouseYOffset = p.y - table.getRowHeight(resizingRow);
private void swapCursor(){
Cursor tmp = table.getCursor();
table.setCursor(otherCursor);
otherCursor = tmp;
public void mouseMoved(MouseEvent e){
if((getResizingRow(e.getPoint())>=0)
!= (table.getCursor() == resizeCursor)){
swapCursor();
public void mouseDragged(MouseEvent e){
int mouseY = e.getY();
if(resizingRow >= 0){
int newHeight = mouseY - mouseYOffset;
if(newHeight > 0)
table.setRowHeight(resizingRow, newHeight);
}cross-post: http://forum.java.sun.com/thread.jspa?forumID=57&threadID=755250
-
Can anybody help me in fixing the problem ? of JTable ( CODE GIVEN )
My problem is
1)when i select the combo box (2nd column) through keyboard the selected item is not visible in the cell
2) i need to press TAB key twice to go to next cell .
3) also before editing i need to press a key to start editing (caret visible) HELP ME
CODE CAN BE RUN TO SEE WHAT I MEANT
<code>
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;
import java.text.*;
public class BaseTable
public JScrollPane scrollPane;
public JTable table;
public int totalRows;
public int i,numRows,numCols;
public TableModel model;
public int rowCount;
public JComboBox box;
public BaseTable()
String[] items=new String[]{"item1","jItem2","kItem3","Item4","Item5","Item6"};
String[] columns = {"Column1","Column2","Column3","Column4","Column5","Column6","Column7","Column8","Column9"};
box=new JComboBox(items);
box.setEditable(true);
DefaultTableModel baseModel=new DefaultTableModel();
baseModel.setColumnIdentifiers(columns);
table = new JTable(baseModel)
protected void processKeyEvent(KeyEvent e)
if ( e.getID() == KeyEvent.KEY_PRESSED && e.getKeyCode() != e.VK_TAB)
int column = table.getSelectedColumn();
int row = table.getSelectedRow();
Rectangle r = getCellRect(row, column, false);
Point p = new Point( r.x, r.y );
SwingUtilities.convertPointToScreen(p, table);
try
System.out.println("PROCESS KEY EVENT Typing"+e.getKeyCode());
Robot robot = new Robot();
robot.mouseMove(p.x, p.y );
robot.mousePress(InputEvent.BUTTON1_MASK);
robot.mouseRelease(InputEvent.BUTTON1_MASK);
robot.mouseMove(0, 0 );
catch (Exception e2) {}
else
System.out.println("PROCESS KEY EVENT IN ELSE");
if(e.getKeyCode() == e.VK_TAB && table.isEditing())
((DefaultCellEditor)table.getCellEditor()).stopCellEditing();
else
super.processKeyEvent(e);
Vector vectorRow = new Vector();
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
vectorRow.addElement("");
TableCellEditor tableCellEditor_comboBox = new MyCustomTableCellEditor(box,this);
table.getColumnModel().getColumn(1).setCellEditor(tableCellEditor_comboBox);
((DefaultTableModel)table.getModel()).addRow(vectorRow);
rowCount = table.getRowCount();
((DefaultTableModel)table.getModel()).fireTableRowsInserted(rowCount,rowCount);
scrollPane = new JScrollPane(table);
scrollPane.setForeground(Color.white);
rowCount = table.getRowCount();
numCols = table.getColumnCount();
public class MyCustomTableCellEditor extends DefaultCellEditor
JTable table=null;
BaseTable baseTable=null;
JComboBox box=null;
MyCustomTableCellEditor(JComboBox editorComponent,BaseTable baseTable)
super(editorComponent);
this.table=baseTable.table;
this.baseTable=baseTable;
setClickCountToStart(0);
public Component getTableCellEditorComponent(
JTable table,
Object value,
boolean isSelected,
int row,
int column)
super.getTableCellEditorComponent(table,value,isSelected,row,column);
box=(JComboBox)getComponent();
box.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);
return box;
public static void main(String s1[])
BaseTable t=new BaseTable();
JFrame f=new JFrame();
f.getContentPane().add(t.scrollPane);
f.setSize(800,200);
f.setVisible(true);
</code>sahas@sun, you're very impolite! farukkhan was trying to help, and he's right because when you use code formatting the code is really easier to read.
Perhaps you have lost a chance for getting the answer! -
Can any one tell what is the problem in this code?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
import java.util.*;
public class AppletTest2 extends JApplet implements ActionListener,MouseMotionListener,WindowListener{
JFrame fr = new JFrame("Visual Tool -- Work Flow Editor");
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel();
JButton sButton = new JButton("Source");
JButton rButton = new JButton("Redirection");
JButton dButton = new JButton("Destination");
JButton connect = new JButton("Connect");
BasicStroke stroke = new BasicStroke(2.0f);
int flag = 1 ;
Vector lines = new Vector();
JButton sBut,rBut,dBut;
int x1 = 0 ;
int y1 = 0 ;
int x2 = 0 ;
int y2 = 0;
int x3 = 0;
int y3 = 0;
int i=0;
int j=0;
int k=0;
int l = 100;
int b = 50;
public void init(){
/*********Frame ******************/
fr.getContentPane().setLayout(new BorderLayout());
fr.setSize(700,500);
fr.getContentPane().add(panel1,BorderLayout.CENTER);
fr.getContentPane().add(panel2,BorderLayout.SOUTH);
fr.addWindowListener(this);
/*****************PANEL 1*********************/
panel1.setLayout(null);
panel1.setBounds(new Rectangle(0,0,400,400));
panel1.setBackground(new Color(105,105,205));
/************************PANEL 2 *************/
panel2.setLayout(new FlowLayout());
panel2.setBackground(new Color(105,205,159));
panel2.add(sButton);
panel2.add(rButton);
panel2.add(dButton);
panel2.add(connect);
connect.setToolTipText("Use this button after selecting From and To position to connect");
/***************************LISTENER********************/
sButton.addActionListener(this);
rButton.addActionListener(this);
dButton.addActionListener(this);
connect.addActionListener(this);
fr.setVisible(true);
fr.setResizable(false);
} // init clse
/************************** START METHOD **********************************************/
public void start(){
System.out.println("inside start");
paint(panel1.getGraphics());
/*******************************APPLET METHODS **************************************************/
public void stop(){}
public void destroy(){}
/******************************MOUSE MOTION LISTENERS METHOD*************************************/
public void mouseMoved(MouseEvent e){System.out.println("moved");}
public void mouseDragged(MouseEvent e){System.out.println("dragged");}
/***************************************ACTION EVENT IMPLEMENTAION *******************************/
public void actionPerformed(ActionEvent e){
if (e.getSource().equals(sButton)){
sourceObject("Source Object");
else if (e.getSource().equals(rButton)){
redirectionObject("Redirection");
i = i+1;
else if (e.getSource().equals(dButton)){
destinationObject("Destination");
j= j+1;
else if (e.getSource().equals(connect)){
System.out.println("am inside connect");
paint(panel1.getGraphics());
else if(e.getSource().equals(sBut)){
System.out.println("am s button");
x1 = sBut.getX() + l;
y1 = sBut.getY() + (b/2);
else if(e.getSource().equals(rBut)){
System.out.println("am r button");
x2 = rBut.getX() ;
y2 = rBut.getY()+ b/2;
System.out.println("x2 : " + x2 + "y2 :" +y2 );
else if(e.getSource().equals(dBut)){
System.out.println("am d button");
x3 = dBut.getX();
y3 = dBut.getY()+ b/2;
} // action close
/**********************Main **********************************/
public static void main(String args[]){
JApplet at = new AppletTest2();
at.init();
at.start();
/********************my methods starts here *******************/
public void sourceObject(String name){
sBut = new JButton(name);
panel1.add(sBut);
sBut.setBounds(new Rectangle(20,208,l,b));
sBut.addActionListener(this);
System.out.println("am inside the source object") ;
public void redirectionObject(String name){
rBut = new JButton(name);
panel1.add(rBut);
rBut.setBounds(new Rectangle(290,208,l,b));
rBut.addActionListener(this);
System.out.println("am inside the redirection :" + j) ;
public void destinationObject(String name){
dBut = new JButton(name);
panel1.add(dBut);
System.out.println("am inside the destination object") ;
if (j == 0)
dBut.setBounds(new Rectangle(566,60,l,b));
System.out.println("am inside the destination:" + j) ;
} else if (j == 2)
dBut.setBounds(new Rectangle(566,208,l,b));
System.out.println("am inside the destination :" + j) ;
} else if (j == 1)
dBut.setBounds(new Rectangle(566,350,l,b));
System.out.println("am inside the destination :" + j) ;
dBut.addActionListener(this);
/* public void connectObject(Object obj1,Object obj2){
System.out.println("nothing");
/************************************* PAINT **************************/
public void paint(Graphics g){
System.out.println("inside paint");
Graphics2D g2 = (Graphics2D) g;
g2.setStroke(stroke);
if(flag == 1){
System.out.println("inside flag");
int np = lines.size();
System.out.println(np);
for (int I=0; I < np; I++) {
Rectangle p = (Rectangle)lines.elementAt(I);
System.out.println("width" + p.width);
g2.setColor(Color.red);
g2.drawLine(p.x,p.y,p.width,p.height);
System.out.println(p.x +"" +""+ p.y + ""+ ""+ p.width+ "" + ""+ p.height);
flag = -1;
}else if(flag == -1){
if(x1 != 0 && y1 != 0 && x2 != 0 && y2 != 0 ){
// Graphics2D g2 = (Graphics2D) g;
// g2.setStroke(stroke);
g2.setColor(Color.red);
g2.drawLine(x1,y1,x2,y2);
lines.addElement(new Rectangle(x1,y1,x2,y2));
x1 = 0 ;y1 = 0 ;
x2 = 0 ;y2 = 0 ;
// g2.drawLine(100,100,200,200);
else if (x2 != 0 && y2 != 0 && x3 != 0 && y3 != 0 )
// Graphics2D g2 = (Graphics2D) g;
// g2.setStroke(stroke);
g2.setColor(Color.green);
g2.drawLine(x2,y2,x3,y3);
lines.addElement(new Rectangle(x2,y2,x3,y3));
x2 = 0; y2 = 0 ;
x3 = 0 ; y3 = 0 ;
else if (x1 != 0 && y1 != 0 && x3 != 0 && y3 != 0)
// Graphics2D g2 = (Graphics2D) g;
// g2.setStroke(stroke);
g2.setColor(Color.red);
g2.drawLine(x1,y1,x3,y3);
lines.addElement(new Rectangle(x1,y1,x3,y3));
x1 = 0; y1 = 0 ;
x3 = 0 ; y3 = 0 ;
// repaint();
/********************************WINDOW LISTENER IMPLEMENTATION *****************************/
public void windowActivated(WindowEvent we) {
flag = 1;
paint(panel1.getGraphics());
System.out.println("windowActivated -- event 1");
//start();
public void windowClosed(WindowEvent we) {
System.out.println("windowClosed -- 2");
public void windowClosing(WindowEvent we){
System.out.println("windowClosing -- 3");
public void windowDeactivated(WindowEvent we) {
System.out.println("windowDeactivated -- 4");
public void windowDeiconified(WindowEvent we) {
flag = 1;
System.out.println("windowDeiconified -- 5");
paint(panel1.getGraphics());
public void windowIconified(WindowEvent we) {
System.out.println("windowIconified -- 6");
//paint(panel1.getGraphics());
public void windowOpened(WindowEvent we) {
// flag = 1;
// paint(panel1.getGraphics());
System.out.println("windowopened -- 7");
The problem am facing here is that when i minimize the frame and maximize , my old lines are getting disappared.
For avoiding that i am storing the old coordinates and
try to redraw , when maximize.
but the lines are coming for flash of second and disappearing once again ?
can any one help?
thanks allVery interestingly the same code is repainting in
Linux SUSE,jdk1.3.
but not in WINNT , jdk 1.3
Any reason ?
Is the swing 100 % platform independenet ?????
Does swing also uses native thread ??? -
Dear experts,
While working on a program,i am having a problem which is just killing me.This is a simple drawing program.On clicking draw button,user
can do free hand drawing.On clicking line he can stretch line to any
coordinate.Similarily do erasing etc.
Problem underlies in rectangle part.I am using some conditions.
Conditions are based on analysis.Fixx and Fixy are the points
when mouse is pressed.
Prevx and Prevy are coordinates which are stored before retrieving
newer ones.x and y are new coordinates.
I have marked the relevant code as part of code for easy understanding.
Problem is in behaviour for rectangle.If i draw twoards either side
it works well but the moment i drag right ,left,up down ,i get
patched near origin(fixed point) from where mouse was pressed ie
fixx,fixy.
I recommend if this could be copied as it is and run,the problem will come to light better.
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.*;
public class FProf extends JPanel implements MouseListener,ActionListener,MouseMotionListener
JFrame main_window;
int draw_mode,erase_mode,line_mode,box_mode;
double fixx,fixy;
double initx,inity;
double x,y;
JButton b_draw;
JButton b_erase;
JButton b_line;
JButton b_rec;
JPanel draw_panel;
JPanel bt_panel;
Graphics2D g2;
Point p;//Mouse pointer
Image image=null;
double prevx,prevy;
double c1,c2,c3,c4,c5,c6,c7,c8;
Stroke[] linestyles = new Stroke[] {
new BasicStroke(25.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL),
new BasicStroke(25.0f, BasicStroke.CAP_SQUARE,BasicStroke.JOIN_MITER),
new BasicStroke(1.0f, BasicStroke.CAP_ROUND,BasicStroke.JOIN_MITER),
new BasicStroke(25.0f, BasicStroke.CAP_ROUND,
BasicStroke.JOIN_ROUND), };
FProf()
draw_mode=0; //Inactive
erase_mode=0; //Inactive
addMouseListener(this);
addMouseMotionListener(this);
GridLayout l=new GridLayout(4,4);
main_window=new JFrame("Fountain Prof V.200");
bt_panel=new JPanel();
b_draw=new JButton ("Draw");
b_draw.addActionListener(this);
b_erase=new JButton("Erase");
b_erase.addActionListener(this);
b_line=new JButton("Line");
b_line.addActionListener(this);
b_rec=new JButton ("Box");
b_rec.addActionListener(this);
main_window.getContentPane().setLayout(new BorderLayout());
main_window.getContentPane().add("Center",this);
bt_panel.setLayout(l);
bt_panel.add(b_draw);
bt_panel.add(b_erase);
bt_panel.add(b_line);
bt_panel.add(b_rec);
main_window.getContentPane().add("East",bt_panel);
main_window.setSize(800,600);
main_window.show();
private void draw()
if ((erase_mode==1) &&(draw_mode==0) &&(line_mode==0)&&(box_mode==0)) {
g2.setPaintMode();
g2.setColor(Color.white);
g2.setStroke(linestyles[3]); // Select the line style to use
g2.draw(new Line2D.Double(initx,inity,x,y));
repaint();
else if ((draw_mode==1) && (line_mode==0) &&(erase_mode==0)&&(box_mode==0))
g2.setPaintMode();
g2.setColor(Color.black);
g2.setStroke(linestyles[2]); // Select the line style to use
g2.draw(new Line2D.Double(initx,inity,x,y));
repaint();
else if ((draw_mode==0) && (erase_mode==0) &&(line_mode==1)&&(box_mode==0))
repaint();
else if ((draw_mode==0) && (erase_mode==0) &&(line_mode==0)&&(box_mode==1))
repaint();
public void paintComponent(Graphics g)
super.paintComponent(g);
if (image == null)
System.out.print(getHeight());
g2=(Graphics2D) g;
image = createImage(getWidth(), getHeight());
g2 = (Graphics2D)image.getGraphics();
g2.setColor(Color.white);
g2.fillRect(0, 0, getWidth(), getHeight());
g2.setColor(Color.black);
Rectangle r = g.getClipBounds();
g.drawImage(image, r.x, r.y, r.width+r.x, r.height+r.y, r.x, r.y, r.width+r.x, r.height+r.y, null);
public void mouseReleased(MouseEvent e)
public void mouseEntered(MouseEvent e)
public void mouseExited(MouseEvent e)
public void change_cursor()
Toolkit tk=Toolkit.getDefaultToolkit();
if ((draw_mode==1)&&(erase_mode==0)) {
Image img=tk.getImage("Pen.gif");
Cursor dym=tk.createCustomCursor(img,new Point(10,10),null);
setCursor(dym);
else if ((erase_mode==1)&&(draw_mode==0)) {
Image img=tk.getImage("eraser.gif");
Cursor dym=tk.createCustomCursor(img,new Point(10,10),null);
setCursor(dym);
public void mouseClicked(MouseEvent e)
public void mouseDragged(MouseEvent e)
Point p;
if ((draw_mode ==1)||(erase_mode==1)) {
initx=x;inity=y;
p=e.getPoint();
x=p.getX();
y=p.getY();
draw();
if ((line_mode==1)&&(box_mode==0)) {
if (mousehasmoved(e)) {
prevx=x;prevy=y;
p=e.getPoint();
x=p.getX();
y=p.getY();
g2 = (Graphics2D)image.getGraphics();
g2.setColor(Color.black);
g2.setXORMode(Color.white);
g2.draw(new Line2D.Double(fixx,fixy,prevx,prevy)); //erasing previous line
draw();
g2.draw(new Line2D.Double(fixx,fixy,x,y)); //redrawing newer one
draw();
if ((line_mode==0)&&(box_mode==1)) {
if (mousehasmoved(e)) {
prevx=x;prevy=y;
p=e.getPoint();
x=p.getX();
y=p.getY();
g2 = (Graphics2D)image.getGraphics();
g2.setColor(Color.black);
g2.setXORMode(Color.white);
if ((x<=fixx) && (y>=fixy)) {
c1=x;c2=fixy;c3=fixx-x;c4=y-fixy;c5=prevx;c6=fixy;c7=fixx-prevx;c8=prevy-fixy;
else if ((x>=fixx)&&(y>=fixy)) {
c1=fixx;c2=fixy;c3=x-fixx;c4=y-fixy;c5=fixx;c6=fixy;c7=prevx-fixx;c8=prevy-fixy;
else if ((x>=fixx)&&(y<=fixy)) {
c1=fixx;c2=y;c3=x-fixx;c4=fixy-y;c5=fixx;c6=prevy;c7=prevx-fixx;c8=fixy-prevy;
else if ((x<=fixx)&&(y<=fixy)) {
c1=x;c2=y;c3=fixx-x;c4=fixy-y;c5=prevx;c6=prevy;c7=fixx-prevx;c8=fixy-prevy;
g2.draw(new Rectangle2D.Double(c5,c6,c7,c8));
draw();
g2.draw(new Rectangle2D.Double(c1,c2,c3,c4));
draw();
}public void mouseMoved(MouseEvent e)
p=e.getPoint();
x=p.getX();
y=p.getY();
main_window.setTitle("X- "+x+" "+"Y- "+y);
initx=x;inity=y; //Get me current position
if ((draw_mode==1)||(erase_mode==1)) {
//change_cursor();
else {
setCursor(Cursor.getDefaultCursor());
public void mousePressed(MouseEvent ex)
if ((draw_mode==0) && (erase_mode==0) &&((line_mode==1)||(box_mode==1))) {
fixx=ex.getX();fixy=ex.getY();
public void actionPerformed(ActionEvent ev)
Object ob=ev.getSource();
if (ob==b_draw) {
draw_mode=1;erase_mode=0;line_mode=0;
box_mode=0;
if (ob==b_erase) {
erase_mode=1;draw_mode=0;line_mode=0;
box_mode=0;
if (ob==b_line) {
erase_mode=0;draw_mode=0;line_mode=1;
box_mode=0;
if (ob==b_rec) {
erase_mode=0;draw_mode=0;line_mode=0;box_mode=1;
public static void main(String args[])
new FProf();
public boolean mousehasmoved (MouseEvent e)
return((initx != e.getX()) ||(inity!=e.getY()));
}}change your mouseDragged method to something like:
public void mouseDragged(MouseEvent e)
Point p;
if ((draw_mode == 1) || (erase_mode == 1))
initx = x;
inity = y;
p = e.getPoint();
x = p.getX();
y = p.getY();
draw();
if ((line_mode == 1) && (box_mode == 0))
if (mousehasmoved(e))
prevx = x;
prevy = y;
p = e.getPoint();
x = p.getX();
y = p.getY();
g2 = (Graphics2D) image.getGraphics();
g2.setColor(Color.black);
g2.setXORMode(Color.white);
g2.draw(new Line2D.Double(fixx, fixy, prevx, prevy)); // erasing
// previous
// line
draw();
g2.draw(new Line2D.Double(fixx, fixy, x, y)); // redrawing
// newer one
draw();
if ((line_mode == 0) && (box_mode == 1))
if (mousehasmoved(e))
prevx = x;
prevy = y;
p = e.getPoint();
x = p.getX();
y = p.getY();
g2 = (Graphics2D) image.getGraphics();
g2.setColor(Color.black);
g2.setXORMode(Color.white);
* calculate the former rectangle - it does not depend to
* the new rectangle!
if((prevx <= fixx) && (prevy >= fixy))
c5 = prevx;
c6 = fixy;
c7 = fixx - prevx;
c8 = prevy - fixy;
else
if ((prevx >= fixx) && (prevy >= fixy))
c5 = fixx;
c6 = fixy;
c7 = prevx - fixx;
c8 = prevy - fixy;
else
if ((prevx >= fixx) && (prevy <= fixy))
c5 = fixx;
c6 = prevy;
c7 = prevx - fixx;
c8 = fixy - prevy;
else
if ((prevx <= fixx) && (prevy <= fixy))
c5 = prevx;
c6 = prevy;
c7 = fixx - prevx;
c8 = fixy - prevy;
* calculate the new rectangle here
if ((x <= fixx) && (y >= fixy))
c1 = x;
c2 = fixy;
c3 = fixx - x;
c4 = y - fixy;
else
if ((x >= fixx) && (y >= fixy))
c1 = fixx;
c2 = fixy;
c3 = x - fixx;
c4 = y - fixy;
else
if ((x >= fixx) && (y <= fixy))
c1 = fixx;
c2 = y;
c3 = x - fixx;
c4 = fixy - y;
else
if ((x <= fixx) && (y <= fixy))
c1 = x;
c2 = y;
c3 = fixx - x;
c4 = fixy - y;
g2.draw(new Rectangle2D.Double(c5, c6, c7, c8));
draw();
g2.draw(new Rectangle2D.Double(c1, c2, c3, c4));
draw();
}why?
You calculated the former rectangle in dependence to the newly created one. It does not depend on that, but needs its own if statements. I'm sure you will understand what I mean when looking at the method. -
Display .gif In Applet Problem
I have been making a game. Very simply, the game has a main class and another truely important class that extends JFrame, it is the map. In it i need to upload .gif files and display them. It worked up until recently because i needed to make a sepperate class. I know how to use the getImage() for Images and the the way for ImageIcons, but for some reason, they never display (they display just whiteness). My Code is as follows
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import java.io.*;
// when this puppy reads from a file, it'll be able to have 55 15 x 15 terrains per row
// 35 15 x 15 terrains per column
// arrows by everythign that u would need to consider in finding the problem
// this is not the main class
public class GameMap extends JPanel implements MouseListener, MouseMotionListener, KeyListener{
public static final int MAX_BULLETS = 200;
public static final int MAX_PLAYERS = 50;
public static final int SPLAT_SIZE = 15;
public static final int PLAYER_SIZE = 15;
public static final int MAX_MESSAGES = 10;
public static final int ROBOT_SIZE = 15;
private static final int rowTerrains = 35;
private static final int columnTerrains = 55;
private static int currentBullets = 0;
private static int currentPlayers = 0;
private static int bulletRotation = 0;
private static int aimX, aimY;
private boolean mapLoaded;
private boolean writingMessage;
private boolean imagesLoaded;
private int messageRotation;
private int tileCoord;
private String messageText = "";
private String currentMap;
private Bullet bullet[] = new Bullet[MAX_BULLETS];
private Player player[] = new Player[MAX_PLAYERS];
private Message message[] = new Message[MAX_MESSAGES];
private Color backgroundColor = new Color(81, 141, 23);
private Image offscreenMap; // offscreen image of map
private Graphics mapGraphics;
private ImageIcon yellowSplat1, yellowSplat2, yellowSplat3, yellowSplat4, yellowSplat5, bluePlayerBack, bluePlayerFront, bluePlayerRight, bluePlayerLeft, grass, tree, mountain, robot1;
private Terrain terrain[] = new Terrain[(rowTerrains * columnTerrains)];
public GameMap(){
this(800, 450);
public GameMap(int width, int height){
addMouseListener(this);
addMouseMotionListener(this);
addKeyListener(this); // use method requestFocusInWindow() for this to work
setPreferredSize(new Dimension(width, height));
setBackground(backgroundColor);
for (int x = 0; x < bullet.length; x++){
bullet[x] = new Bullet();
for (int x = 0; x < player.length; x++){
player[x] = new Player();
for (int x = 0; x < message.length; x++){
message[x] = new Message();
for (int x = 0, currentX = 0, currentY = 0; x < (rowTerrains * columnTerrains); x++){
terrain[x] = new Terrain();
terrain[x].setX(currentX);
terrain[x].setY(currentY);
currentX += 15;
if (currentX > columnTerrains * 15){
currentX = 0;
currentY += 15;
player[0].drawPlayer(0, 0);
//loadMap("Map1.txt"); // this is called to load the map right when this object is initialized
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D g2d = (Graphics2D)g;
Composite originalComposite = g2d.getComposite();
if (imagesLoaded == false){
yellowSplat1 = new ImageIcon("yellow1.gif");
yellowSplat2 = new ImageIcon("yellow2.gif");
yellowSplat3 = new ImageIcon("yellow3.gif");
yellowSplat4 = new ImageIcon("yellow4.gif");
yellowSplat5 = new ImageIcon("yellow5.gif");
bluePlayerBack = new ImageIcon("BlueBack.gif");
bluePlayerFront = new ImageIcon("BlueFront.gif");
bluePlayerLeft = new ImageIcon("BlueLeft.gif");
bluePlayerRight = new ImageIcon("BlueRight.gif");
grass = new ImageIcon("Grass.gif");
tree = new ImageIcon("Tree.gif");
mountain = new ImageIcon("Mountain.gif");
robot1 = new ImageIcon("Robot1.gif");
if (mapLoaded == false){ // so a map is loaded when game is started
loadMap("Map1.txt");
mapLoaded = true;
g.drawImage(offscreenMap, 0, 0, this);
for (int x = 0; x < bullet[0].totalBullets; x++){
if (bullet[x].getArrived()){
//find splat type and display it
g2d.setComposite(makeComposite(0.5f));
switch (bullet[x].getSplatType()){
case 0:
yellowSplat1.paintIcon(this, g2d, bullet[x].getDestX() - SPLAT_SIZE / 2, bullet[x].getDestY() - SPLAT_SIZE / 2);
break;
case 1:
yellowSplat2.paintIcon(this, g2d, bullet[x].getDestX() - SPLAT_SIZE / 2, bullet[x].getDestY() - SPLAT_SIZE / 2);
break;
case 2:
yellowSplat3.paintIcon(this, g2d, bullet[x].getDestX() - SPLAT_SIZE / 2, bullet[x].getDestY() - SPLAT_SIZE / 2);
break;
case 3:
yellowSplat4.paintIcon(this, g2d, bullet[x].getDestX() - SPLAT_SIZE / 2, bullet[x].getDestY() - SPLAT_SIZE / 2);
break;
case 4:
yellowSplat5.paintIcon(this, g2d, bullet[x].getDestX() - SPLAT_SIZE / 2, bullet[x].getDestY() - SPLAT_SIZE / 2);
break;
else{
g2d.setComposite(originalComposite);
g2d.setColor(Color.yellow);
g2d.fillOval(bullet[x].getX(), bullet[x].getY(), 3, 3);
g2d.setComposite(originalComposite);
g.setColor(Color.yellow);
for (int x = 0; x < player[0].totalPlayers; x++){
if (player[x].getPlayerPosition().equals("Back")){
bluePlayerBack.paintIcon(this, g2d, player[x].getX(), player[x].getY());
else if (player[x].getPlayerPosition().equals("Right")){
bluePlayerRight.paintIcon(this, g2d, player[x].getX(), player[x].getY());
else if (player[x].getPlayerPosition().equals("Left")){
bluePlayerLeft.paintIcon(this, g2d, player[x].getX(), player[x].getY());
else if (player[x].getPlayerPosition().equals("Front")){
bluePlayerFront.paintIcon(this, g2d, player[x].getX(), player[x].getY());
else{
g2d.fillOval(player[x].getX(), player[x].getY(), 15, 15);
if (writingMessage){
g2d.setColor(new Color(0, 0, 130));
g2d.setComposite(makeComposite(0.5f));
g2d.draw3DRect(8, 7, 800, 17, true);
g2d.setComposite(originalComposite);
g2d.setColor(Color.yellow);
g2d.drawString(messageText, message[0].getX(), 20);
for (int x = 0; x < MAX_MESSAGES; x++){
if (message[x].isDisplayed()){
g2d.drawString(message[x].getMessage(), message[x].getX(), message[x].getY());
private AlphaComposite makeComposite(float alpha) {
int type = AlphaComposite.SRC_OVER;
return(AlphaComposite.getInstance(type, alpha));
public void drawBullet(int aimX, int aimY){
bullet[bulletRotation].drawBullet(player[0].getX() + PLAYER_SIZE / 2, player[0].getY() + PLAYER_SIZE / 2, aimX, aimY);
player[0].setPlayerPosition(bullet[bulletRotation].getPlayerPosition());
bulletRotation++;
if (bulletRotation >= MAX_BULLETS){
bulletRotation = 0;
public void loadMap(String map){
mapLoaded = false;
currentMap = map;
try{
BufferedReader in = new BufferedReader(new FileReader(map));
String input, string1, string2;
for (int x = 0; x < terrain.length; x++){
terrain[x].setFilled(false);
for (int x = 0, currentArray; x < terrain.length; x++){
if ((input = in.readLine()) != null) {
StringTokenizer st = new StringTokenizer(input);
currentArray = Integer.parseInt(st.nextToken());
terrain[currentArray].setTerrainType(st.nextToken());
terrain[currentArray].setFilled(true);
else{
break;
in.close();
offscreenMap = createImage(size().width, size().height);
mapGraphics = offscreenMap.getGraphics();
//mapGraphics.clearRect(0, 0, size().width, size().height);
// everything from here down is to be painted to mapGraphics... but it doesn't get this far cuz of an error
for (int x = 0; x < terrain.length; x++){
if (terrain[x].getTerrainType().equals("Grass")){
grass.paintIcon(this, mapGraphics, terrain[x].getX(), terrain[x].getY());
System.out.println("terrain(" + x + ") is Grass");
else if (terrain[x].getTerrainType().equals("Tree")){
tree.paintIcon(this, mapGraphics, terrain[x].getX(), terrain[x].getY());
System.out.println("terrain(" + x + ") is Tree");
else if (terrain[x].getTerrainType().equals("Mountain")){
mountain.paintIcon(this, mapGraphics, terrain[x].getX(), terrain[x].getY());
System.out.println("terrain(" + x + ") is Mountain");
catch (FileNotFoundException e){
System.out.println("Map not found");
catch (IOException e){
System.out.println("IOException Error!");
// **** mouse Listener ****//
public void mouseClicked(MouseEvent e){}
public void mousePressed(MouseEvent e){}
public void mouseReleased(MouseEvent e){
if (e.getButton() == 1){
//System.out.println("player[0].movePlayer(" + e.getX() + ", " + e.getY() + ")");
aimX = e.getX();
aimY = e.getY();
movePlayer(aimX, aimY);
else if (e.getButton() == 3){
aimX = e.getX();
aimY = e.getY();
drawBullet(aimX, aimY);
public void mouseEntered(MouseEvent e){
if (isFocusOwner() != true){
requestFocusInWindow();
public void mouseExited(MouseEvent e){}
// **** end mouse listener ****//
// **** mouse motion listener ****//
public void mouseDragged(MouseEvent e){}
public void mouseMoved(MouseEvent e){}
// **** end mouse motion listener ****/
public void keyPressed(KeyEvent e){}
public void keyReleased(KeyEvent e){}
public void keyTyped(KeyEvent e){}
}I removed a few unnecessary methods from this code to make it easier to view. EVERYTHING works except for the images displaying. The reason i'm having this problem now is i just redid my workspace and copied the code and i think some glitch stopped it from compiling correctly all along so now i experience this problem in the applet viewer. Though, even before, i couldn't get anything to display in an applet.
And yes, everything is in the same place as the html file.
Thanks for your help!Here's a way to keep track of and paint images with a simple Rectangle array. And also a way to remove lengthy initialization code blocks from paintComponent. Move the images by moving the rectangles.
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class GameMapRx
public static void main(String[] args)
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new GameMapPanel());
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
class GameMapPanel extends JPanel
Image[] images;
Rectangle[] rects;
boolean firstTime;
final int PAD;
public GameMapPanel()
loadImages();
firstTime = true;
PAD = 20;
protected void paintComponent(Graphics g)
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
int w = getWidth();
int h = getHeight();
if(firstTime)
initializeGameMap(w, h);
for(int i = 0; i < rects.length; i++)
Rectangle r = rects;
g.drawImage(images[i], r.x, r.y, this);
g2.draw(r);
private void loadImages()
String path = "images/duke/";
String ext = ".gif";
images = new Image[10];
for(int i = 0; i < images.length; i++)
try
URL url = getClass().getResource(path + "T" + (i + 1) + ext);
images[i] = ImageIO.read(url);
catch(MalformedURLException mue)
System.out.println("Bad URL: " + mue.getMessage());
catch(IOException ioe)
System.out.println("Unable to read: " + ioe.getMessage());
private void initializeGameMap(int w, int h)
rects = new Rectangle[images.length];
int imageWidth = images[0].getWidth(this);
int imageHeight = images[0].getHeight(this);
int cols = (w - 2*PAD) / imageWidth;
int xInc = imageWidth + (w - cols * imageWidth) / (cols + 1);
int x0 = (w - cols * imageWidth -
(cols - 1) * ((w - cols * imageWidth) / (cols + 1))) / 2;
for(int i = 0; i < images.length; i++)
int x = x0 + xInc * (i % cols);
int rows = i / cols;
int y = PAD + (imageHeight + PAD) * rows;
rects[i] = new Rectangle(x, y, imageWidth, imageHeight);
firstTime = false; -
Problem in moving Rotated Shape object
Hi All,
I want to move the rotated shape object based on the mouse movement
m able to move the object which is not rotated, but m facing the problem when i move the rotated object its moving position is not correct . I am expecting to maintain both shape objects movement is same, i mean if i did mouse movement to right rotated object moves upwards and normal object moves towards right insted of moving both r moving towards to right.
Pls help me
the following code is m using to moving the object
The one which in red color is not rotated and the one which is in black color has rotated.
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
import com.clinapps.LDPConstants;
public class MoveRotatedObj extends JFrame
public MoveRotatedObj()
JPanel pane = new Dorairaj();
add(pane);
public static void main(String[] args)
MoveRotatedObj f = new MoveRotatedObj();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(400, 400);
f.setLocation(200, 200);
f.setVisible(true);
static class Dorairaj extends JPanel
implements
MouseListener,
MouseMotionListener
Shape o = null;
Rectangle2D rect = new Rectangle2D.Double(
10, 10, 100, 100);
Graphics2D g2 = null;
boolean flag = true;
int x=10,y=10,x1, y1, x2, y2;
AffineTransform af = new AffineTransform();
AffineTransform originalAt = new AffineTransform();
int origin = 0;
public Dorairaj()
addMouseListener(this);
addMouseMotionListener(this);
protected void paintComponent(Graphics g)
super.paintComponent(g);
g2 = (Graphics2D) g;
g2.draw(new Rectangle2D.Double(0,0,500,500));
g2.translate(origin, origin);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
rect = new Rectangle2D.Double(
x, y, 150, 100);
g2.setColor(Color.RED);
g2.draw(rect);
g2.setColor(Color.black);
originalAt = g2.getTransform();
g2.rotate(Math.toRadians(270), 200, 200);
g2.draw(rect);
g2.setTransform(originalAt);
* Invoked when a mouse button has been pressed on a component.
public void mousePressed(MouseEvent e)
e.translatePoint(-origin, -origin);
x1 = e.getX();
y1 = e.getY();
public void mouseDragged(MouseEvent e)
x2 = e.getX();
y2 = e.getY();
x = x + x2 - x1;
y = y + y2 - y1;
x1 = x2;
y1 = y2;
repaint();
public void mouseMoved(MouseEvent e)
* Invoked when the mouse button has been clicked (pressed and released)
* on a component.
public void mouseClicked(MouseEvent e)
repaint();
* Invoked when a mouse button has been released on a component.
public void mouseReleased(MouseEvent e)
* Invoked when the mouse enters a component.
public void mouseEntered(MouseEvent e)
* Invoked when the mouse exits a component.
public void mouseExited(MouseEvent e)
Edited by: DoraiRaj on Sep 16, 2009 12:51 PM
Edited by: DoraiRaj on Sep 16, 2009 1:00 PM
Edited by: DoraiRaj on Sep 16, 2009 1:07 PMThanks for replay and suggestion morgalr,
I mean MoveRotatedObj1 is MoveRotatedObj only jsut m maintaing a copy on my system like MoveRotatedObj1.
finally i solved my problem like this ,
Is this correct approach m followinig or not pls let me know .
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JPanel;
import com.clinapps.LDPConstants;
public class MoveRotatedObj extends JFrame
public MoveRotatedObj()
JPanel pane = new Dorairaj();
add(pane);
public static void main(String[] args)
MoveRotatedObj f = new MoveRotatedObj();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(400, 400);
f.setLocation(200, 200);
f.setVisible(true);
static class Dorairaj extends JPanel
implements
MouseListener,
MouseMotionListener
Shape o = null;
Rectangle2D rect = new Rectangle2D.Double(
10, 10, 100, 100);
Rectangle2D rect1 = new Rectangle2D.Double(
10, 10, 100, 100);
Graphics2D g2 = null;
boolean flag = true;
double lx, ly;
int x = 10, y = 10, x1, y1, x2, y2;
int l = 20, m = 20;
int angle = 270;
AffineTransform af = new AffineTransform();
AffineTransform originalAt = new AffineTransform();
int origin = 0;
public Dorairaj()
addMouseListener(this);
addMouseMotionListener(this);
protected void paintComponent(Graphics g)
super.paintComponent(g);
g2 = (Graphics2D) g;
g2.draw(new Rectangle2D.Double(
0, 0, 500, 500));
g2.translate(origin, origin);
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
rect = new Rectangle2D.Double(
x, y, 150, 100);
g2.setColor(Color.RED);
g2.draw(rect);
rect1 = new Rectangle2D.Double(
l, m, 150, 100);
g2.setColor(Color.black);
originalAt = g2.getTransform();
g2.rotate(Math.toRadians(angle), 200, 200);
g2.draw(rect1);
g2.setTransform(originalAt);
public void mousePressed(MouseEvent e)
e.translatePoint(-origin, -origin);
x1 = e.getX();
y1 = e.getY();
public void mouseDragged(MouseEvent e)
boolean left, right, up, bottm;
int dx, dy;
left = right = up = bottm = false;
x2 = e.getX();
y2 = e.getY();
dx = x2 - x1;
dy = y2 - y1;
x = x + dx;
y = y + dy;
up = dy < 0;
bottm = dy > 0;
left = dx < 0;
right = dx > 0;
if (left || right)
// b += dx;
m += dx;
if (up || bottm)
// a -= dy;
l -= dy;
x1 = x2;
y1 = y2;
repaint();
public void mouseMoved(MouseEvent e)
public void mouseClicked(MouseEvent e)
repaint();
public void mouseReleased(MouseEvent e)
public void mouseEntered(MouseEvent e)
public void mouseExited(MouseEvent e)
}
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