Subitha Sangar

Hi, Michael Dunn. Thank you so much for your help. i did the same way and it is working fine.

I am going to save the drawing into an arraylist and save that arraylist as a file. my coding under savefile() is bellow. when i use the button from paintpanel it is working fine and i can able to save it... but i should use the menu and get the event from menu. i donno how to get the menu even from PMenuBar.java. Please give me an idea how can i call this save method from PMenuBar. my savefile() in DrawareaPanel is bellow.

public void savefile()
{
JFileChooser filecho = new JFileChooser(".");
filecho.setDialogTitle("Save File As");
int action = fichooser.showSaveDialog(this);

if (action != JFileChooser.APPROVE_OPTION) {
// When canceled.
return;
}


File file = filecho.getSelectedFile();

if (file.exists()) {
action = JOptionPane.showConfirmDialog(this,"File exists, overwrite the file?");
if (action != JOptionPane.YES_OPTION)
return;
}


try {
ObjectOutputStream out =
new ObjectOutputStream(new FileOutputStream(file));
//out.writeObject(getBackground());
out.writeObject(arrayline);
out.close();
}
catch (IOException e) {
JOptionPane.showMessageDialog(this,
"Error :\t" + e.getMessage());
}
}

Thanks for your help. If i have another menu item call "save" and i have one class savefile() in DrawareaPanel then how can i call savefile() from PMenuBar. Please give me an idea. Thanks in advance. My programes are below.

1) PaintMain.java ================== import javax.swing.*; public class PaintMain { public static void main(String args[]) { JFrame frame = new JFrame("draw"); PMenuBar menucontent = new PMenuBar(); frame.setJMenuBar(menucontent.createMenuBar()); PaintPanel toolitem = new PaintPanel(); frame.add(toolitem); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } } 2) PMenuBar.java ================== import javax.swing.*; import java.awt.*; import java.awt.event.*; public class PMenuBar implements ActionListener { JMenuItem save = new JMenuItem("Save"); JMenuBar createMenuBar() { JMenuBar menubar = new JMenuBar(); JMenu filemenu = new JMenu("File"); filemenu.add(Save); save.addActionListener(this); menubar.add(filemenu); return menubar; } public void actionPerformed(ActionEvent e) { JMenuItem menuitem = (JMenuItem)e.getSource(); if(menuitem == save) { // here i want to call savefile() in DrawareaPanel } } } 3) PaintPanel.java ==================== import javax.swing.*; import java.awt.*; import java.awt.event.*; public class PaintPanel extends JPanel implements ActionListener { private JButton linebt, ovalbt, flovalbt; private DrawareaPanel drawareapanelb; public PaintPanel() { linebt = new JButton("Line"); ovalbt = new JButton("Oval"); flovalbt = new JButton("Fill Oval"); JPanel pnlbt = new JPanel(); pnlbt.setBackground( Color.YELLOW ); pnlbt.add(linebt); pnlbt.add(ovalbt); pnlbt.add(flovalbt); drawareapanelb = new DrawareaPanel(); setLayout(new BorderLayout()); add(pnlbt, BorderLayout.NORTH); add(drawareapanelb, BorderLayout.CENTER); linebt.addActionListener(this); ovalbt.addActionListener(this); flovalbt.addActionListener(this); } public void actionPerformed(ActionEvent event) { if(event.getSource() == linebt) { drawareapanelb.findbutton("linebut"); } if(event.getSource() == ovalbt) { drawareapanelb.findbutton("ovalbut"); } if(event.getSource() == flovalbt) { drawareapanelb.findbutton("flovalbut"); } } } 4) DrawareaPanel.java ======================== import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.*; public class DrawareaPanel extends JPanel implements MouseListener, MouseMotionListener { int x1, y1, x2, y2; public String button; public Color colour = Color.black; public DrawareaPanel() { addMouseListener(this); addMouseMotionListener(this); } public void savefile() { // my save file codes are here } public void mousePressed(MouseEvent e) { x1 = e.getX(); y1 = e.getY(); } public void mouseDragged(MouseEvent e) { x2 = e.getX(); y2 = e.getY(); repaint(); } public void mouseReleased(MouseEvent e){ repaint(); } public void mouseClicked(MouseEvent e){} public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} public void mouseMoved(MouseEvent e){} public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2=(Graphics2D) g; g2.setColor(colour); if(button == "linebut"){ g2.drawLine(x1, y1, x2 , y2); } if(button == "ovalbut"){ g2.drawOval(x1, y1, x2 - x1, y2 - y1); } if(button == "flovalbut"){ g2.fillOval(x1, y1, x2 - x1, y2 - y1); } } public void findbutton(String a) { button = a; } public void findcolour(Color b) { colour = b; } }

Hi i am a basic leaner in java. Anyone please help me how can i change the colour when i choose the coloritem from menubar. May be my OOPs comcept is wrong. But i should keep 4 different programs. Please tell me how i have to use the OOP concept to keep 4 programs and do this work. My 4 programes are bellow. Advance thanks for your help.

1) PaintMain.java ================ import javax.swing.*; public class PaintMain { public static void main(String args[]) { JFrame frame = new JFrame("draw"); PMenuBar menucontent = new PMenuBar(); frame.setJMenuBar(menucontent.createMenuBar()); PaintPanel toolitem = new PaintPanel(); frame.add(toolitem); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } } 2) PMenuBar.java ================== import javax.swing.*; import java.awt.*; import java.awt.event.*; public class PMenuBar implements ActionListener { JMenuItem redb = new JMenuItem("Red"); JMenuItem greenb = new JMenuItem("Green"); JMenuItem yellowb = new JMenuItem("Blue"); JMenuBar createMenuBar() { JMenuBar menubar = new JMenuBar(); JMenu filemenu = new JMenu("Color Chooser"); filemenu.add(redb); filemenu.add(greenb); filemenu.add(yellowb); redb.addActionListener(this); greenb.addActionListener(this); yellowb.addActionListener(this); menubar.add(filemenu); return menubar; } public void actionPerformed(ActionEvent e) { JMenuItem menuitem = (JMenuItem)e.getSource(); if(menuitem == redb) { } if(menuitem == greenb) { } if(menuitem == yellowb) { } } } 3) PaintPanel.java ==================== import javax.swing.*; import java.awt.*; import java.awt.event.*; public class PaintPanel extends JPanel implements ActionListener { private JButton linebt, ovalbt, flovalbt; private DrawareaPanel drawareapanelb; public PaintPanel() { linebt = new JButton("Line"); ovalbt = new JButton("Oval"); flovalbt = new JButton("Fill Oval"); JPanel pnlbt = new JPanel(); pnlbt.setBackground( Color.YELLOW ); pnlbt.add(linebt); pnlbt.add(ovalbt); pnlbt.add(flovalbt); drawareapanelb = new DrawareaPanel(); setLayout(new BorderLayout()); add(pnlbt, BorderLayout.NORTH); add(drawareapanelb, BorderLayout.CENTER); linebt.addActionListener(this); ovalbt.addActionListener(this); flovalbt.addActionListener(this); } public void actionPerformed(ActionEvent event) { if(event.getSource() == linebt) { drawareapanelb.findbutton("linebut"); } if(event.getSource() == ovalbt) { drawareapanelb.findbutton("ovalbut"); } if(event.getSource() == flovalbt) { drawareapanelb.findbutton("flovalbut"); } } } 4) DrawareaPanel.java ======================== import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.*; public class DrawareaPanel extends JPanel implements MouseListener, MouseMotionListener { int x1, y1, x2, y2; public String button; public Color colour = Color.black; public DrawareaPanel() { addMouseListener(this); addMouseMotionListener(this); } public void mousePressed(MouseEvent e) { x1 = e.getX(); y1 = e.getY(); } public void mouseDragged(MouseEvent e) { x2 = e.getX(); y2 = e.getY(); repaint(); } public void mouseReleased(MouseEvent e){ repaint(); } public void mouseClicked(MouseEvent e){} public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} public void mouseMoved(MouseEvent e){} public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2=(Graphics2D) g; g2.setColor(colour); if(button == "linebut"){ g2.drawLine(x1, y1, x2 , y2); } if(button == "ovalbut"){ g2.drawOval(x1, y1, x2 - x1, y2 - y1); } if(button == "flovalbut"){ g2.fillOval(x1, y1, x2 - x1, y2 - y1); } } public void findbutton(String a) { button = a; } public void findcolour(Color b) { colour = b; } }

EDIT by mw: Added Code Tags to original poster's indentation.
[ January 16, 2006: Message edited by: marc weber ]

Thanks for your idea Jeff.

How to save a paragraph (multi line) in a string.. then im going to display that string as a showMessageDialog. My problem is i can save in a string as a single line or use the special symbol like \n or \t. if i do so i have to type every thing in a line.. how can i type is like a paragraph and then show the message.

String details = " fffffffffffffffffffffffffffffffff ffffffffffffffff
ffffffffffffffff fffffffff fffffffffffffff ffffffff"

JOptionPane.showMessageDialog(null,ab,"deatails",JOptionPane.INFORMATION_MESSAGE);

Any one could please help me to give idea "how to draw a rectangle using mouse in Jpanel" and it should allow to draw more than one rectangle or other shapes.. if anyone have sample code please give it and help me... thanks in advance.

Any one could please help me to give idea "how to draw a rectangle using mouse in Jpanel" and it should allow to draw more than one rectangle or other shapes.. if anyone have sample code please give it and help me... thanks in advance.